vitocal 300-g technicalguidefeb2010

7/30/2019 Vitocal 300-g Technicalguidefeb2010

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VIESMANN VITOCAL 300-GBrine/water and water/water heat pump

Single and two-stage, from 21 kW

Heat pump with electric drive for DHW and central heating inmono-mode or dual mode heating systems.

VITOCAL 300-G Type BW/BWS, WW

Type BW/BWS:Brine/water heat pump, 21.2 to 42.8 kW.

Type WW:Water/water heat pump, 28.1 to 57.4 kW.

Type BW/WW:For single stage operation or operation at stage 1 of a two-stage heat pump.

Type BWS: As stage 2 of a two-stage heat pump for increased output inconjunction with type BW/WW.

Highly flexible due to combination with modules of differentoutput.

Easier handling through small and light modules.

5457 919 GB 2/2010

Technical guide


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Index

1. Vitocal 300-G 1. 1 Product description ..................................................................................................... 4 Benefits of type BW/BWS, WW .............................................................................. 4 Delivered condition ................................................................................................. 4

1. 2 Specification ............................................................................................................... 5 Specification ............................................................................................................ 5 Dimensions of type BW/BWS, WW ......................................................................... 7 Output diagrams ..................................................................................................... 8

2. Installation accessories 2. 1 Primary circuit ............................................................................................................. 11 Sensor well set, primary circuit ............................................................................... 11 Brine circuit pressure switch ................................................................................... 11 Brine accessory pack .............................................................................................. 11 Primary pump .......................................................................................................... 12 Brine distributor for geothermal collectors .............................................................. 13 Brine distributor for geothermal probes/geothermal collectors ............................... 14 Heat transfer medium Tyfocor ................................................................................ 16 Filling station ........................................................................................................... 16

2. 2 Secondary circuit ........................................................................................................ 17

Secondary pump ..................................................................................................... 17 Safety equipment block ........................................................................................... 18

2. 3 Cooling ........................................................................................................................ 19 Contact humidistat .................................................................................................. 19 Natural cooling extension kit ................................................................................... 19 2-way motorised ball valve (DN 32) ........................................................................ 19 Three-way diverter valve (R 1) ............................................................................. 19 Room temperature sensor ...................................................................................... 19 Frost stat ................................................................................................................. 19 Fan convectors Vitoclima 200-C ............................................................................. 19

2. 4 DHW heating via an external heat exchanger ............................................................ 22 2-way motorised ball valve (DN 32) ........................................................................ 22 Cylinder primary pump ............................................................................................ 22

3. Design information 3. 1 Power supply and tariffs ............................................................................................. 22

Application procedure ............................................................................................. 223. 2 Positioning requirements ............................................................................................ 22

Minimum clearances ............................................................................................... 23 Min. space requirement .......................................................................................... 23 Electrical connections ............................................................................................. 23

3. 3 Hydraulic connections ................................................................................................. 26 Connections on the primary side brine/water (stages 1 and 2) ............................... 26 Connections on the primary side water/water (stages 1 and 2) .............................. 28 Connections on secondary side for two-stage heat pumps .................................... 31

3. 4 System versions ......................................................................................................... 333. 5 Sizing the heat pump .................................................................................................. 34

Mono-mode operation ............................................................................................. 34 Mono-energetic operation ....................................................................................... 35 Dual mode operation ............................................................................................... 35 Supplement for DHW heating ................................................................................. 35 Supplement for setback mode ................................................................................ 36

3. 6 Heat source for brine/water heat pumps ..................................................................... 36 Frost protection ....................................................................................................... 36 Geothermal collector ............................................................................................... 36 Geothermal probe ................................................................................................... 39 Expansion vessel for primary circuit ....................................................................... 40 Pipework, primary circuit ......................................................................................... 41 Pump output supplements (percentage) for operation with Tyfocor ....................... 43

3. 7 Heat source for water/water heat pumps .................................................................... 43 Groundwater ........................................................................................................... 43 Calculating the required groundwater volume ........................................................ 44 Permits for a groundwater/water heat pump system .............................................. 44 Sizing the heat exchanger, primary circuit/separating heat exchanger .................. 45 Cooling water .......................................................................................................... 45

3. 8 Central heating/central cooling ................................................................................... 46 Heating circuit ......................................................................................................... 46 Heating circuit and heat distribution ........................................................................ 46 Cooling operation .................................................................................................... 47

Index

2 VIESMANN VITOCAL 300-G 5 4 5 7 9 1 9 G B


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3. 9 Systems with heating water buffer cylinder ................................................................ 47 Heating water buffer cylinder operated in parallel ................................................... 47 Heating water buffer cylinder for optimised runtimes .............................................. 48 Heating water buffer cylinder for bridging periods when the supply is blocked ...... 48

3.10 Water quality ............................................................................................................... 48 Heating water .......................................................................................................... 48

3.11 DHW heating .............................................................................................................. 49 DHW connection ..................................................................................................... 49 Function description regarding DHW heating ......................................................... 49 Hydraulic connection, primary store system ........................................................... 50

3.12 Cooling operation ........................................................................................................ 53 Types and configuration .......................................................................................... 53 Cooling function Natural cooling ............................................................................. 53 Hydraulic connection, natural cooling function ........................................................ 53

3.13 Swimming pool water heating ..................................................................................... 56 Hydraulic connection, swimming pool ..................................................................... 56 Sizing the plate heat exchanger .............................................................................. 57

3.14 Connection of solar thermal systems .......................................................................... 57 Sizing the solar expansion vessel ........................................................................... 58

4. Heat pump control unit 4. 1 Vitotronic 200, type WO1A ......................................................................................... 59 Structure and functions ........................................................................................... 59 Time switch ............................................................................................................. 59 Setting the operating programs ............................................................................... 60 Frost protection function ......................................................................................... 60 Heating and cooling curve settings (slope and level) .............................................. 60 Heating systems with heating water buffer cylinder or low loss header .................. 61 Outside temperature sensor ................................................................................... 61 Specification Vitotronic 200, type WO1A ................................................................ 61

4. 2 Control unit accessories ............................................................................................. 62 Contactor relay ........................................................................................................ 62 Contact temperature sensor as system flow temperature sensor ........................... 63 Cylinder temperature sensor ................................................................................... 63 Thermostat for controlling the swimming pool temperature .................................... 63 Contact temperature sensor ................................................................................... 63 Mixer motor ............................................................................................................. 64 Extension kit for one heating circuit with mixer with integral mixer motor ............... 64 Extension kit for one heating circuit with mixer for separate mixer motor ............... 65 Immersion thermostat ............................................................................................. 65 Contact thermostat .................................................................................................. 65 Vitotrol 200A ........................................................................................................... 66 Room temperature sensor for separate cooling circuit ........................................... 66 KM BUS distributor ................................................................................................. 67 External extension H1 ............................................................................................. 67 Vitocom 100, type GSM .......................................................................................... 67 Vitocom 300, type FA5, FI2, GP2 ........................................................................... 68 LON communication module ................................................................................... 69 LON connecting cable for data exchange between control units ............................ 70 Extension of the connecting cable .......................................................................... 70 Terminator ............................................................................................................... 70

5. Keyword index .............................................................................................................................................. 71

Index (cont.)

VITOCAL 300-G VIESMANN 3 5 4 5 7 9 1 9 G B


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1.1 Product descriptionHeat pumps with electric drive for DHW and central heating in mono-mode, mono-energetic or dual mode operation.The brine/water heat pumps extract heat from the ground with the helpof geothermal collectors or probes.The ground provides almost completely stable temperatures all theyear round, enabling the heat pumps to operate virtually independentlyof the outside temperature. They can cover the entire heat demand of a building, even on colder days.

The water/water heat pumps with delivery and return wells gain heatfrom the groundwater which offers stable temperatures, enabling theheat pumps to achieve constantly high COPs.Consequently they are suitable for year round heating operation andDHW provision.

Benefits of type BW/BWS, WW

A Hermetically sealed Compliant scroll compressor B Condenser C Evaporator D Only type BW/WW:

Weather-compensated, digital heat pump control unitVitotronic 200, type WO1A

Mono-mode for central and DHW heating. Menu-guided heat pump control unit Vitotronic 200, type WO1A, for

weather-compensated heating mode. Max. flow temperature of 60 C for high DHW convenience and ideal

for modernising an existing radiator heating system. High COP to EN 14511: up to 4.8 (brine 0 C/water 35 C). Low operating costs with the highest efficiency at every operating

point through the innovative RCD (Refrigerant Cycle Diagnostic)system with electronic expansion valve.

Especially suitable for low heating system temperatures, e.g. under-floor heating.

Highly flexible due to combination with modules of different output. Low noise and vibration emissions through 3-D sound concept Convenient for applying for subsidies: with integral energy state-

ment. Easier handling through small and light modules. Higher output can be achieved through cascade arrangement:

21.2 to 342.4 kW Type BWS:

As stage 2 of a two-stage heat pump for increased output in conjunction with type BW and WW.

Delivered conditionType BW Compact heat pump design (with soft starter). Epoxy-coated casing. CFC-free, non-combustible refrigerant R 410A (refrigerant mixture,

comprising 50 % R 32 and 50 % R 125). Evaporator and condenser made from copper-soldered stainless

steel plate heat exchanger (1.4401), for the heating circuit and brine/groundwater circuit.

Electronic expansion valve and patented refrigerant distribution. New refrigerant RCD (Refrigerant Cycle Diagnostic) circuit diagnos-

tic system.

Outside temperature sensor, flow and return temperature sensorsplus sensors for the primary circuit flow and return.

With fitted weather-compensated digital heat pump control unitVitotronic 200, type WO1A

Type WW Heat pump type BW Water/water heat pump conversion kit (frost stat for primary circuit

and flow limiter for well circuit)

Type BWS Heat pump type BW without heat pump control unit

Vitocal 300-G



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1.2 Specification

Specification

Type BW/BWS

BW/BWS 121 129 145Output data to DIN EN 14511 (0/35 C, 5 K spread)Rated heating output kW 21.2 28.8 42.8Refrigerating capacity kW 17.0 23.3 34.2Power consumption kW 4.48 5.96 9.28Coefficient of performance (COP) 4.73 4.83 4.6Output data to DIN EN 255 (0/35 C, 10 K spread)Rated heating output kW 21.5 29.2 43.5Refrigerating capacity kW 17.5 23.8 35.0Power consumption kW 4.33 5.75 9.16Coefficient of performance (COP) 4.97 5.08 4.8Brine (primary circuit)Content l 7.3 9.1 12.7Min. flow rate (t = 5 K) l/h 3300 4200 6500Pressure drop mbar 90 120 200

Max. flow temperature C 25 25 25Min. flow temperature C 5 5 5Heating water (secondary circuit)Content l 7.3 9.1 12.7Min. flow rate (t = 10 K) l/h 1900 2550 3700Pressure drop mbar 30 48 60Max. flow temperature C 60 60 60

Type WWWW 121 129 145Output data to DIN EN 14511 (10/35 C, 5 K spread)Rated heating output kW 28.1 37.1 58.9Refrigerating capacity kW 23.7 31.4 48.9Power consumption kW 4.73 6.2 10.7Coefficient of performance (COP) 5.94 6.0 5.5Brine (primary circuit)Content l 7.3 9.1 12.7Min. flow rate (t = 4 K) l/h 5200 7200 10600Pressure drop mbar 200 300 440Max. inlet temperature C 25 25 25Min. inlet temperature C -5 -5 -5Heating water (secondary circuit)Content l 7.3 9.1 12.7Min. flow rate (t = 10 K) l/h 1900 2550 3700Pressure drop mbar 30 48 60Max. flow temperature C 60 60 60

Type BW/BWS, WWBW/BWS, WW 121 129 145

Rated voltage, heat pump compressor stage 2 (type BWS) V 3/PE 400 V/50 HzRated current, compressor A 16 22 34Starting current, compressor (with starting current limiter) A


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BW/BWS, WW 121 129 145Refrigerant circuit Refrigerant R 410 AFill volume kg 6.5 7.3 10.0Compressor Type Hermetically sealed scroll compressor Permiss. operating pressure, high pressure side bar 43 43 43Permiss. operating pressure, low pressure side bar 28 28 28Permiss. operating pressure Primary circuit bar 3 3 3Secondary circuit bar 3 3 3Dimensions Total length mm 1085 1085 1085Total width mm 780 780 780Total height (with open control unit) mm 1267 1267 1267Connections Primary flow and return G 2 2 2Heating flow and return G 2 2 2Weight Heat pump stage 1 (type BW/WW) kg 282 305 345Heat pump stage 2 (type BWS) kg 277 300 340

Sound power level at 0/35 C(test with reference to DIN EN ISO 9614-2) dB(A) 42 44 44

Vitocal 300-G (cont.)



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Dimensions of type BW/BWS, WW

6 0

1 0 7 4

8 7

1 2 6 7

1 0 7 4

780 780

1 0 2 5

6 0

230

540

270

1 0 2 5

230

540

270

8 6 8 6 8 8 1 7 1

3 0 1

8 8

1 7 1

3 0 1

= 300

400 V

230 V< 42 V

400 V

230 V< 42 V

Type BWS on the left; type BW/WW on the right



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Output diagrams

Type 121

G

Water or brine temperature in C

O u t p u

t i n

k W

151050-5

35

30

25

20

15

10

5

0

Water or brine temperature in C151050-5

0

1

2

3

4

5

6

78

A

B

C

DEFDE

F

D

G

E

C o e

f f i c i e n

t o f p e r

f o r m a n c e

( C O P )

D

EF

G

F

G

A Heating outputB Refrigerating capacityC Power consumptionD THV = 35 CE THV = 45 CF THV = 55 CG THV = 60 CTHV Heating circuit flow temperature

NoteData for the COP was calculated with reference to DIN EN 14511.




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Type 129

F


O u t p u

t i n

k W

151050-5

35

30

25

20

15

10

5

0


0

1

2

3

4

5

6

7

8

A

B

C

DEF

D

E

F

D

FE

C o e f

f i c i e n t o f p e r f o r m a n c e

( C O P )

D

E

40

45

G

G

G

G





1


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Type 145

G


O u t p u

t i n

k W

151050-5

70

60

50

40

30

20

10

0


0

1

2

3

4

56

7

A

B

C

D

EF

DE

F

D

FE

C o e

f f i c i e n

t o f p e r

f o r m a n c e

( C O P )

D

EF

G

G

G






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2.1 Primary circuit

Sensor well set, primary circuit

Part no. 7460 714For on-site primary circuit pipework.

Components: Pipe with connection R1 (2 pce) Sensor well for temperature sensors (flow and return)

NoteThe temperature sensors are included in the standard delivery of theheat pump.

Brine circuit pressure switch

Part no. 9532 663

NoteCannot be used in conjunction with potassium carbonate-based heat transfer medium.

Brine accessory packOnly for single stage heat pump type BW 121 and BW 129. For systems with a brine circuit pump (primary pump) in the brine

return. Suitable for Viessmann heat transfer medium "Tyfocor" based on

ethylene glycol (see chapter "Heat transfer medium"). Brine accessory pack for single and two-stage heat pumps, ther-

mally insulated with vapour diffusion-proof material.

Components: Air separator Safety valve (3 bar) Pressure gauge Drain & fill valves (2 pce) Fittings for installing the primary pump Shut-off valves Wall mounting bracket Thermal insulation (vapour diffusion-proof) Expansion vessel Subject to part no., with or without circulation pump

Heat pump type BW 121 BW 129 BW 145Expansion vessel 35 l 50 l on-site

Part no. for brine acces-sory pack

Without circulation pump(Connection set for on-site

circulation pump G 2)

Z008 585 Z008 586 on-site

With Wilo high efficiencycirculation pump, typeStratos Para (3 - 11 m),230 V~(Connection set for on-sitecirculation pump G 1)

Z008 594

With Wilo standard circu-lation pump:

Type TOP S 30/7,400 V~(Connection set for on-site circulation pumpG 2)

Z008 591

Type TOP S 30/10,

400 V~(Connection set for on-site circulation pumpG 2)

Z008 592

Circulation pump curvesSee chapter "Primary pump".

Installation accessories


2


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86

1 9 2

1 9 2

F

K

A

M

L C

B

B

C

GH

E D

B

G

1

G 1

G 1

G 1

360

670

N

A Primary circuit flow (heat pump brine inlet)B Ball valveC Drain & fill valveD Pressure switch connectionE Air separator

F Primary circuit flow (brine inlet, brine accessory pack)

G Pressure gaugeH Safety valve (3 bar)K Primary circuit return (brine outlet, brine accessory pack)L Expansion vessel connectionM Primary circuit return (heat pump brine outlet)

N Primary pump

Assembly and installation information Fit the brine accessory pack horizontally to ensure the correct func-

tion of the air separator. Fit the air blow-off connector above the brine accessory pack. Check the circulation pump for an adequate residual head (see

curves).Position the pump cable entry so that it points downwards or to thel.h. or r.h. side, or turn the pump head if required.

If the brine circuit pressure switch is not connected, the brine acces-sory pack can also be installed in the external interconnecting duct(waterproof).

Primary pumpFor installation in the primary circuit return (brine return)

Components: Circulation pump 400 V~ Thermal insulation (vapour diffusion-proof) Contactor relay

Heat pump type BW 121 BW 129 BW 145Circulation pump part no.

Wilo standard cir-culation pump,type TOP S 30/7,400 V~

Z007 441 on-site

Wilo standard cir-culation pump,type TOP S 30/10,400 V~

Z007 442

NoteFor operation with water/Tyfocor, the pump output supplementsshould be taken into account (see page 43).

Installation accessories (cont.)



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Wilo standard circulation pump curves

( 2 ) m i n . ( 3

)

Pump rate in m/h0 1 2 3 4 5 6

H e a

d i n m

0

1

2

3

4

5

6

7

8

87

m a x . ( 1 )

Type TOP S 30/7, 400 V~

( 2 )

m i n . ( 3 )

Pump rate in m/h0 1 2 3 4 5 6

H e a

d i n m

0

1

2

3

4

56

7

8

87

m a x . ( 1

)

9 10 11 12

9

10

11

12

Type TOP S 30/10, 400 V~

Wilo high efficiency circulation pump curvesOnly in conjuction with brine accessory pack.

H e a

d

i n m

Pump rate in m/h0 1 2 3 4 5

02468

1012

Pump rate in m/h

O u t p u

t i n

W

0 1 2 3 4 5

200

406080

100120140160

10 m8 m

6 m

4 m

2 m

max.

Type Stratos Para (3 - 11 m), 230 V~

Brine distributor for geothermal collectors(Vitocal rated heating output: max. 37.1 kW)

Part no. 7143 762Brass brine distributor, pre-assembled on two anti-vibration mounts.Can be fitted to the house wall, in the cellar duct or in the central serviceduct.

Components: 2 headers for flow and return Flow and return connections for 10 brine circuits, ball valves and

locking ring fittings (PE 20 2.0)

2 quick-acting air vent valves 1 drain & fill valve per header

Up to 4 brine distributors can be connected to each flow and return.



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33

545670

55

63

2 0 0 5 2

1 "

1 "

A Header G 1 (flow)B Header G 1 (return)C Locking ring fittings for PE 20 2.0 mm

D Ball valve for filling and drainingE Ball valves for shutting off the individual circuitsF Sound-absorbing panel

Connection versions

10 9 8 7 6 5 4 3 2 1

1 2 3 4 5 6 7 8 9 10

VL

RL

RL Brine returnVL Brine flow

2019 18 17 16 15 14 13 12 11

11 12 13 14 15 16 17 18 19 20

10 9 8 7 6 5 4 3 2 1

1 2 3 4 5 6 7 8 9 10

A Brine flowB Brine return

NoteFor the allocation of brine distributor to heat pump type, see table indesign information, "Heat sources for brine/water heat pumps",

page 37.

Brine distributor for geothermal probes/geothermal collectors

Locking ring fit-tings

Number of brine circuits Part no.Geothermalprobes

Geothermalcollectors

PE 25 x 2.3 2 7373 332 3 7373 331 4 7182 043

PE 32 x 2.9 2 2 7373 3303 3 7373 3294 4 7143 763

Brine distributor for geothermal probes/geothermal collectorsNickel-plated brine distributor. Can be fitted to the house wall, in thecellar duct or in the central service duct.

Components:

Header for separate flow and return Flow and return connections for 2, 3 or 4 brine circuits, ball valves

and locking ring fittings (PE 25 2.3 or PE 32 2.9) Installation accessories 2 drain & fill valves

Up to 4 brine distributors can be connected to each flow and return.Brine distributors for 2, 3 and 4 brine circuits can be combined in anyorder.




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B

A C

D

F

E

80

8

0

175

Brine distributor for 2 brine circuits

255

80

1 3 0

B

A C

F

D

E


335

80

1

3 0


A Union nut G 2 for ball valve connection, locking ring fitting or afurther module

B Ball valve for filling and drainingC Header G 1D Locking ring fittings for PE 32 2.9 mm or PE 25 2.3 mmE 2" end cap with G plugF Ball valves for shutting off the individual circuits

Connection versions

4

RL

1 2 3VL

14 3 2

Example for 4 brine circuits


VL

RL

41 2 3

14 3 2

85 6 7

58 7 6

Example for 8 brine circuits


Note

For the allocation of brine distributor to heat pump type, see tables indesign information, "Heat sources for brine/water heat pumps",

pages 37 and 39.



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Heat transfer medium Tyfocor 30 l in a disposable container

Part no. 9532 655 200 l in a disposable container

Part no. 9542 602

Light green ready mixed medium for the primary circuit, down to 15 C, based on ethylene glycol with corrosion inhibitors.

Filling station

Part no. 7188 625For filling the primary circuit.

Components: Self-priming impeller pump (30 l/min) Dirt filter, inlet side

Hose, inlet side (0.5 m) Connection hose (2 pce, each 2.5 m) Packing crate (can be used as flushing tank)




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2.2 Secondary circuit

Secondary pump

Secondary pump (DHW and central heat-

ing) Wilo standard circulation pump, type RS25/6-3, 230 V~(only for Vitocal with rated heating output up to28.8 kW)

Part no. 7338 850

Secondary pump (central heating) Grundfos, type UPS 25-60, 230 V~ Part no. 7338 851Laing EC Vario 25/180 G (class B), 230 V~ Part no. 7374 788

Wilo standard circulation pump curves

0 1 2 3Pump rate in m/h

0

1

2

3

4

5

6

H e a

d i n m

4

m a x . ( 1 ) m i n . ( 3 )

( 2 )

0 1 2 3

Pump rate in m/h

0

10

20

30

40

50

60

O u t p u

t i n

W

4

70max. (1)

min. (3)

(2)

Type RS 25/6-3, 230 V~

Grundfos curves

3

2

1

0.50.0 1.0 1.5 2.0 2.50

1.0

2.0

3.0

UPS 25-60

3.0 3.5 4.0

4.0

Flow rate in m/h

H e a

d i n m

4.5 5.0

5.0

6.0

Type UPS 25-60, 230 V~

Laing curves

0.00

Flow rate in m/h

H e a

d i n m

12345

0.5 1.5 2.51.0 2.0 3.0

E6 vario

E4 vario

6

Type E4/E6 Vario 25/180, 230 V~

0.00

Flow rate in m/h

H e a

d i n m

E4 auto

12345

0.5 1.5 2.51.0 2.0 3.0 3.5

6

E6 auto

Type E4/E6 Auto 25/180, 230 V~



2


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2.3 Cooling

Contact humidistat

Part no. 7181 418 Dew point contact switch to prevent the formation of condensate

Natural cooling extension kit

Part no. 7179 172Components:

PCB for processing signals and controlling the natural cooling func-tion

Connection plug Installation accessories

2-way motorised ball valve (DN 32)

Part no. 7180 573 With electric drive (230 V~)

Connection R 1"

Three-way diverter valve (R 1)

Part no. 7165 482 With electric drive (230 V~) Connection R 1

Room temperature sensor

Part no. 7408 012For a separate cooling circuit.

For specification see chapter on control unit accessories (frompage 62)

Frost stat

Part no. 7179 164Safety switch to protect the cooling heat exchanger from frost.

Fan convectors Vitoclima 200-C With three-way control valve With 4-pipe heat exchanger for heating and cooling For wall mounting

Fan convector Vitoclima 200-C Type V202H V203H V206H V209HZ004 926 Z004 927 Z004 928 Z004 929

Plinth for floor mounting 7267 205 Air filter (5 pce) 7428 521 7428 522 7428 523



2


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Specification

Fan convectors Vitoclima 200-C Type V202H V203H V206H V209HCooling capacity kW 2.0 3.4 5.6 8.8Output kW 2.0 3.7 5.3 9.4Power supply [terminals] 1/N/PE 230 V/50 HzFan power consumption at speed V1 W 45 57 107 188at speed V2 W 37 47 81 132at speed V3 W 27 39 64 112at speed V4 W 19 36 55 101at speed V5 W 16 33 41 90Cooling valve kv value m 3/h 1.6 1.6 1.6 2.5Connection R 1/2 R 1/2 R 1/2 R 3/4Heating valve kv value m 3/h 1.6 1.6 1.6 1.6Connection R 1/2 R 1/2 R 1/2 R 1/2Condensate connection mm 18.5 18.5 18.5 18.5Thermostatically activated servomotor

Max. permiss. ambient temperature C 50 50 50 50Max. permiss. media temperature C 110 110 110 110Power consumption W 3 3 3 3Rated current mA 13 13 13 13Weight kg 20 30 39 50

Factory-set fan speed

Dimensions

7 3

c

1 0 0

231204

90170

ab

Front and side view

A Plinth (accessory)

Type Dimensions in mma b c

V202H 768 762 478V203H 1138 1132 478V206H 1508 1502 478V209H 1508 1502 578




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1 0 0

a

b c

d

Wall mounting (front view)

A Air outletB TopC 4 fixing holes 7 8 mmD BottomE Floor F Air inlet

Type Dimensions in mma b c d

V202H 500 430 360 150V203H 870 430 360 150V206H 1240 430 360 150V209H 1240 530 365 157

1 0 0

1 0 0g

hgh

220 220ab

ab

c d e f

c d e f

Position of the hydraulic connections (side view, both sides)

A R.H.B L.H.C Heating return connectionD Cooling return connectionE Heating flow connectionF Cooling flow connection

Type Dimensions in mma b c d e f g h k

V202H 98 56 237 254 390 408 147 189 518V203H 98 56 237 254 390 408 147 189 518V206H 98 56 237 254 390 408 147 189 548V209H 83 40 235 246 495 506 145 188 618



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2.4 DHW heating via an external heat exchanger

2-way motorised ball valve (DN 32)

Part no. 7180 573 With electric drive (230 V~) Connection R 1"

Cylinder primary pumpFor DHW heating via a plate heat exchanger (on-site). Grundfos UPS 25-60 B

Part no. 7820 403 Grundfos UPS 32-80 B

Part no. 7820 404

Curves

Pump rate in m/h0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

3

2

1

0

1.0

2.0

3.0

4.05.0

6.0

UPS 25-60B

H e a

d i n m

Type UPS 25-60 B, 230 V~

Pump rate in m/h1 2 3 4 5 6 7 8 9 10 110

H e a

d i n m

0

1

2

3

4

5

6

7

8

9UPS 32-80 B

Type UPS 32-80 B, 230 V~

Design information

3.1 Power supply and tariffs According to current Federal tariffs [Germany], the electrical demandfor heat pumps is considered domestic usage. Where heat pumps areused to heat buildings, the local power supply company must first givepermission [check with your local power supply company].Check the connection conditions specified by your local power supplyutility for the stated equipment details. It i s crucial to establish whether a mono-mode and/or mono-energetic heat pump operation is feasiblein the supply area.

It is also important to obtain information about standing charges andenergy tariffs, about the options for utilising off-peak electricity duringthe night and about any power-off periods.

Address any questions relating to these issues to your customer's localpower supply utility.

Application procedureThe following details are required to assess the effect of the heat pumpoperation on the grid of your local power supply utility: User address Location where the heat pump is to be used Type of demand in accordance with general tariffs

(domestic, agricultural, commercial, professional and other use)

Intended heat pump operating mode Heat pump manufacturer Type of heat pump Connected load in kW (from rated voltage and rated current) Max. starting current in A Max. heat load of the building in kW

3.2 Positioning requirements

The installation room must be dry and safe from the risk of frost. Never install the appliance in living spaces or directly next to, below

or above quiet rooms/bedrooms.

Maintain the minimum clearances and minimum room volume (seethe following chapter).

Sound insulation measures: Heat pump installation on anti-vibration platforms or plinths (see

next chapter).

Reduction of reverberative surfaces, particularly on walls and ceil-ings. Rough structural renders absorb more sound than tiles. If quietness is a particularly important consideration, apply sound-

absorbing material to the walls and ceilings (commercially availa-ble).

Hydraulic connections:




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Always make hydraulic heat pump connections flexible and stress-free (e.g. by using Viessmann heat pump accessories).

Apply anti-vibration fixings to pipework and installations. To prevent condensation, thermally insulate lines and components

in the primary circuit with vapour diffusion-proof materials.

Minimum clearances

Note Additional strain relief clamps are required for the power cables if the

clearance behind the heat pump is more than 80 mm. Observe clearances required for installation and maintenance

400 400

1

5 0 0

A

Type BW, WW

A Clearance depends on on-site installation and location

400

1

5 0 0

A

= 300 400

Type BW/BWS, WW, type BWS (stage 2) is always positioned to theleft of type BW, WW (stage 1)

A Clearance depends on on-site installation and location

Min. space requirement According to DIN EN 378 the minimum volume for the installation roomdepends on the amount and the consistency of the refrigerant.

Vmin =mmax

G

Vmin Minimum room volume in m 3

mmax max. amount of refrigerant in kgG Practical limit in accordance with DIN EN 378, subject to the

refrigerant constituency

Refrigerant Practical limit in kg/m 3

R 407 C 0.31R 410 A 0.44R 134 A 0.25

NoteIf several heat pumps are to be installed in one room, add the minimumroom volumes of the individual appliances together.

Taking into account the refrigerant used and the fill volume, thefollowing minimum room volumes result:Rated heating output Min. space requirement21.2 kW 15 m 3

28.8 kW 17 m 3

42.8 kW 23 m 3

Electrical connections

Observe the technical connection requirements specified by your local power supply utility.

Your local power supply utility will provide you with details regardingthe required metering and switching equipment.

A separate electricity meter should be provided for the heat pump.

Viessmann heat pumps operate with 400 V~ (in some countries230 V models are also available).The control circuit requires a power supply of 230 V~.The control circuit fuse (6.3 A) is located in the heat pump controlunit.

Design information (cont.)


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Power-OFFIt is possible for the power supply utility to shut down the compressor and instantaneous heating water heater (if installed). The ability tocarry out such a shutdown may be a power supply utility requirementfor providing a lower tariff.

This must not shut down the power supply to the heat pump controlunit.

Single stage heat pump

D

E

C

FO

A

UP

RSG

HK

L

M

A Heat pump type BW, WWC DHW cylinder D Outside temperature sensor, sensor lead (2 x 0.75 mm 2)E DHW circulation pump, power cable (3 x 1.5 mm 2)F Cylinder temperature sensor, sensor lead (2 x 0.75 mm 2)G Junction boxH Motorised two-way valve, normally closedK Cylinder primary pump (DHW side), power cable (3 x 1.5 mm 2 )L Circulation pump for cylinder heating (heating water side), power

cable (3 x 1.5 mm2

)or Three-way diverter valve, power cable (5 x 1.5 mm 2)Recommendation: use the circulation pump for cylinder heatingas hydraulic balancing is better achieved than with the three-waydiverter valve.

M Circulation pump, primary circuit (brine), power cable (3 x1.5 mm 2 or for circulation pump with thermal circuit breaker 5 x 1.5 mm 2)If a 400 V~ circulation pump is used, it should be connected via acontactor relay.

O Secondary pump, power cable (3 x 1.5 mm 2)Further circulation pumps are required for heating water buffer cylinders, heating circuits with mixers and external heat sources;see system scheme, page 33.

P Instantaneous heating water heater (on site): An instantaneous heating water heater (on site) can only beinstalled outside the heat pump. The flow temperature sensor system must be installed in the direction of flow downstream of the instantaneous heating water heater. Power cable: See details provided by manufacturer Control via heat pump control unit

R Heat pump control unit power cable, 230 V~, 50 Hz (5 x1.5 mm 2) with power-OFF contact

S Compressor power cable, 400 V~ (see table)U Electricity meter/mains

Type WW: Note the following additional components: Well pump (If a 400 V~ well pump is used, it should be connected

via a contactor relay.)

Flow limiter Frost stat Separating heat exchanger

NoteFor heating water buffer cylinders, heating circuits with mixers, exter-nal heat sources (gas/oil/wood) etc., additional supply and control

cables and sensor leads must be factored in.Check the core cross-section of the power cables and enlarge if required.

Recommended power cables:Type Heat pump control unit

(230 V~)Compressor (400 V~)

Max. cable lengthBW 121, WW 121 5 x 1.5 mm 2 4 x 2.5 mm 2 50 mBW 129, WW 129 5 x 1.5 mm 2 4 x 4.0 mm 2 50 mBW 145, WW 145 5 x 1.5 mm 2 4 x 6.0 mm 2 40 m

Line lengths in the heat pump plus wall clearance:Type BW, WW BWSHeat pump control unit power supply (230 V~) 1.0 m A connecting cable is used for the power sup-

plyCompressor power supply (400 V~) 1.0 m 1.0 m

Additional power cables 1.5 m Connecting cable




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Two-stage heat pump

D

E

C

FM

O

A

U

B

NP

RS

TG

HK

L

A Heat pump type BW, WW (stage 1)B Heat pump type BWS (stage 2)C DHW cylinder D Outside temperature sensor, sensor lead (2 x 0.75 mm 2)E DHW circulation pump, power cable (3 x 1.5 mm 2)F Cylinder temperature sensor, sensor lead (2 x 0.75 mm 2)G Junction boxH Motorised two-way valve, normally closedK Cylinder primary pump (DHW side), power cable (3 x 1.5 mm 2 )L Circulation pump for cylinder heating (heating water side), power

cable (3 x 1.5 mm 2 )or Three-way diverter valve, power cable (5 x 1.5 mm 2)Recommendation: use the circulation pump for cylinder heatingas hydraulic balancing is better achieved than with the three-way

diverter valve.Two circulation pumps for cylinder heating are required for thetwo-stage heat pump (one for every stage; see page 31).

M Circulation pump, primary circuit (brine), power cable (3 x1.5 mm 2 or for circulation pump with thermal circuit breaker 5 x 1.5 mm 2)If a 400 V~ circulation pump is used, i t should be connected via acontactor relay.With the two-stage heat pump, either a common primary pumpcan be used for both stages, or a separate primary pump can beused for each stage.

N Electrical connecting cables between heat pump stage 1 and 2(standard delivery)

O Secondary pump, power cable (3 x 1.5 mm 2)Two secondary pumps are required for the two-stage heat pump(one for every stage; see page 31).Further circulation pumps are required for heating water buffer cylinders, heating circuits with mixers and external heat sources;see system scheme, page 33.

P Instantaneous heating water heater (on site): An instantaneous heating water heater (on site) can only beinstalled outside the heat pump. The flow temperature sensor system must be installed in the direction of flow downstream of the instantaneous heating water heater. Power cable: See details provided by manufacturer Control via heat pump control unit

R Heat pump control unit power cable, 230 V~, 50 Hz (5 x1.5 mm 2) with power-OFF contact

S Compressor power cable, type BW, WW, 400 V~ (see table)T Compressor power cable, type BWS, 400 V~ (see table)U Electricity meter/mains

Type WW: Note the following additional components: Well pump (If a 400 V~ well pump is used, it should be connected

via a contactor relay.)

Flow limiter Frost stat Separating heat exchanger

NoteFor heating water buffer cylinders, heating circuits with mixers, exter-nal heat sources (gas/oil/wood) etc., additional supply and control

cables and sensor leads must be factored in.Check the core cross-section of the power cables and enlarge if required.

Recommended power cables:Type Heat pump control unit

(230 V~)Compressor (400 V~)

Max. cable lengthBW 121, WW 121 5 x 1.5 mm 2 4 x 2.5 mm 2 50 mBWS 121 4 x 2.5 mm 2 50 mBW 129, WW 129 5 x 1.5 mm 2 4 x 4.0 mm 2 50 mBWS 129 4 x 4.0 mm 2 50 mBW 145, WW 145 5 x 1.5 mm 2 4 x 6.0 mm 2 40 mBWS 145 4 x 6.0 mm 2 40 m

Line lengths in the heat pump plus wall clearance:Type BW, WW BWSHeat pump control unit power supply (230 V~) 1.0 m A connecting cable is used for the power sup-

plyCompressor power supply (400 V~) 1.0 m 1.0 m

Additional power cables 1.5 m Connecting cable



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3.3 Hydraulic connections

Connections on the primary side brine/water (stages 1 and 2)

Single stage heat pump (type BW)

wPP

wW

wQP

wU

qT

1

2

P

P Primary circuit interface (see system examples)

Required equipmentPos. Description1 Heat pump2 Heat pump control unitqT Primary pumpwP Brine accessory packwQ Pressure switch, primary circuitwW Brine distributor for geothermal probes/collectorswU Geothermal probes/collectors

Two-stage heat pumps (type BW+BWS)

Two primary pumps

wW

9wU

1

2

wPP

wQP P

wQP

qZ

qU

P

wT qT





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Equipment requiredPos. Description1 Heat pump stage 12 Heat pump control unit9 Heat pump stage 2qT Primary pump (heat pump stage 1)qZ Flow temperature sensor, primary circuitqU Return temperature sensor, primary circuitwP Brine accessory packwQ Pressure switch, primary circuitwW Brine distributor, geothermal probes/collectorswT Primary pump (heat pump stage 2)wU Geothermal probes/collectors

One common primary pump (on site)

wW

9wU

1

2

wPP

wQP

qT

P

wQP

qZ

qU

P

P Primary circuit interface

Equipment requiredPos. Description1 Heat pump stage 12 Heat pump control unit9 Heat pump stage 2qT Common primary pumpqZ Flow temperature sensor, primary circuitqU Return temperature sensor, primary circuitwP Brine accessory packwQ Pressure switch, primary circuitwW Brine distributor, geothermal probes/collectorswU Geothermal probes/collectors



3


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Connections on the primary side water/water (stages 1 and 2)

Single stage heat pump (type WW)

wU wIwZ

wW

wE

wR

wP

qT

qO1

2

P

wQP

P


Equipment requiredPos. Description1 Heat pump2 Heat pump control unitqT Primary pumpqO Frost stat, primary circuit (conversion kit standard delivery)wP Brine accessory packwQ Pressure switch, primary circuitwW Separating heat exchanger, primary circuitwE Flow limiter, well circuit ( (conversion kit standard delivery), remove jumper when connecting)wR Dirt trapwZ Well pump (suction pump for groundwater; connect via on-site contactor with fuse protection)wU Delivery wellwI Return well




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Two-stage heat pumps (type WW+BWS)

Two primary pumps

2

wU wIwZ

wW

wE

wR

wP

qO

9

wT

1

P

wQP

qZ

qU

P

qT


Equipment requiredPos. Description1 Heat pump stage 1 with conversion kit water/water heat pump2 Heat pump control unit9 Heat pump stage 2qT Primary pump (heat pump stage 1)qZ Flow temperature sensor, primary circuitqU Return temperature sensor, primary circuitqO Frost stat, primary circuit (component of conversion kit)wP Brine accessory packwQ Pressure switch, primary circuitwW Heat exchanger, primary circuitwE Flow limiter, well circuit (component of conversion kit; remove jumper when connecting)wR Dirt trapwT Primary pump (heat pump stage 2)wZ Well pump (suction pump for groundwater; connection via on-site contactor with fuse protection)wU Delivery wellwI Return well



3


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One common primary pump (on site)

9 1

2

wU wIwZ

wW

wE

wR

wPP

qO

qT

qZ

qU

P

wQ

P


Equipment requiredPos. Description1 Heat pump stage 1 with conversion kit water/water heat pump2 Heat pump control unit9 Heat pump stage 2

qT Common primary pumpqZ Flow temperature sensor, primary circuitqU Return temperature sensor, primary circuitqO Frost stat, primary circuit (component of conversion kit)wP Brine accessory packwQ Pressure switch, primary circuitwW Heat exchanger, primary circuitwE Flow limiter, well circuit (component of conversion kit; remove jumper when connecting)wR Dirt trapwZ Well pump (suction pump for groundwater; connection via on-site contactor with fuse protection)wU Delivery wellwI Return well




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Connections on secondary side for two-stage heat pumps

1 qE

qW

9

6qP

2

wT

3

8

P

qU

qZ

H

P

C

W

5

qT

qQ

C Cooling interfaceH Heating interface

P Primary circuit interface (see primary circuit)W DHW interface (see DHW heating)

Equipment requiredPos. Description Heat source1 Heat pump stage 12 Heat pump control unit3 Outside temperature sensor 5 Circulation pump for cylinder heating (heating water side), heat pump stage 16 Secondary pump, heat pump stage 19 Heat pump stage 2qP Secondary pump, heat pump stage 2qQ Circulation pump for cylinder heating (heating water side), heat pump stage 2qW Safety equipment block with safety assemblyqE Expansion vesselqT Primary pump, heat pump stage 1

qZ Flow temperature sensor, primary circuitqU Return temperature sensor, primary circuitwT Primary pump, heat pump stage 2

Two-stage heat pump cascade A heat pump cascade consists of a lead appliance and up to 3 lag heatpumps. In a two-stage heat pump cascade, the lead appliance and lagheat pumps each consist of one heat pump stage 1 and one heat pumpstage 2.The electrical connection is made at the heat pump stage 1 via KMBUS at external extension H1 (accessory).

NoteWith external extension H1 (accessory), the swimming pool water heating function can be enabled in addition to the heat pump cascadeconnection.



3


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2

2

2

2

9

1

9

1

9

1

9

1

q P

6

I V

I I I

I I

I

H P W

C q U q Z

q U q Z

q U q Z

q U q Z

5

q Q

5

q Q

5

5

q Q

q P

6

q P

6

q P

6

3

3

3

3

w T

q T

w T

q T

w T

q T

w T

q T

q Q

C Cooling interfaceH Heating interfaceP Primary circuit interface

W DHW interfaceI Lead appliance (two-stage) of the heat pump cascadeII to IV Lag heat pump (two-stage) 1 to 3

Equipment requiredPos. Description Heat source1 Heat pump stage 12 Heat pump control unit3 Outside temperature sensor 5 Circulation pump for cylinder heating (heating water side), heat pump stage 16 Secondary pump, heat pump stage 19 Heat pump stage 2qP Secondary pump, heat pump stage 2qQ Circulation pump for cylinder heating (heating water side), heat pump stage 2qT Primary pump, heat pump stage 1qZ Flow temperature sensor, primary circuitqU Return temperature sensor, primary circuitwT Primary pump, heat pump stage 2




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3.4 System versions

X Requirement0 Option

Parameter "Systemscheme"

0 1 2 3 4 5 6 7 8 9 10 11

Versions a b c a b c b c b c b c b c b c b c b c b cHeating operation and DHW heatingHeating cir-cuit A1 with-out mixer

X X X X X X X X X X X X X X

Heating cir-cuit withmixer M2

X X X X X X X X X X X X X X X X

Heating cir-cuit M3 withmixer

X X X X X X X X

DHW cylin-

der X X X X X X X X X X X X

Heating water buffer cylin-der

X X X X X X X X X X X X X X X X X X X X

External heatsource

X X X X X X X X X X

Cooling mode (only one cooling circuit possible)Heating circ.

A1 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Heating cir-cuit M2

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Heating cir-cuit M3

0 0 0 0 0 0 0 0

Separate

cooling circuit0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Swimming pool water heatingSwimmingpool (onlywith externalextensionH1)

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Solar DHW heatingSolar (onlywith Vitosolic100/200)

0 0 0 0 0 0 0 0 0 0 0 0

Cascade operationLead appli-ance

XX X X X X X X X X X X X X X X X X X X X X X

Lag heatpump X



3


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Example:

System version 6b: Heating circuit without mixer A1, heating circuitwith mixer M2, DHW cylinder, heating water buffer cylinder

For further examples, see "Heat pump system examples".

3.5 Sizing the heat pump

NoteSizing is of particular relevance to heat pump systems that are to be operated in mono-mode, since oversized equipment will incur dispropor-tionate system costs. Therefore avoid oversizing!

First establish the standard heat load of the building HL. For discus-sions with customers and for the preparation of a quotation, in mostcases estimating the heat load is adequate.

As with all heating systems, determine the standard heat load of thebuilding in accordance with DIN EN 12831 before selecting the appro-priate heat pump.

Mono-mode operation

According to DIN EN 12831, the heat pump system in mono-modemust, as sole heat source, be able to cover the entire heating demandof the building.

When sizing the heat pump, observe the following: Take supplements to the heat load of the building to cover power-

OFF periods into account. [In Germany] the power supply utility maycut off the power supply to heat pumps for up to 3 2 hours withina 24 hour period.Observe additional individual arrangements for customers with spe-cial tariffs.

The building inertia means that 2 hours of power-OFF periods are

not taken into consideration.

NoteHowever, the "enable time" between power-OFF periods must be at least as long as the preceding power-OFF period.

Estimate of the heat load based on the heated areaThe heated surface area (in m 2) is multiplied by the following specificheat demand:

Passive house 10 W/m 2

Low energy house 40 W/m 2

New build (to EnEV) 50 W/m 2

House (built prior to 1995 with standard thermal insu-lation)

80 W/m 2

Older house (without thermal insulation) 120 W/m 2

Theoretical sizing with the power supply blocked for 3 2 hour periodsExample:For a new building with good thermal insulation (50 W/m 2) and aheated area of 170 m 2

Estimated heat load: 8.4 kW Maximum blocking time of 3 2 hours at a minimum outside tem-

perature in accordance with DIN EN 12831

24 h, therefore, result in a daily heat volume of: 8.4 kW 24 h = 202 kWh

To cover the maximum daily heat amount, only 18 h/day are availablefor heat pump operation on account of the power-OFF periods. Thebuilding inertia means that 2 hours of the period during which power is blocked are not taken into consideration. 202 kWh / (18 + 2) h = 10.1 kW

In other words, the heat pump output would need to be increased by20 %, if power-OFF periods of 3 2 hours per day were to beapplied.Frequently, power-OFF periods are only invoked if there is a need todo so. Please contact the customer's power supply utility to enquireabout power-OFF periods.




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Mono-energetic operationIn heating mode, the heat pump system is supplemented by an instan-taneous heating water heater (on site). The control unit switches theinstantaneous heating water heater on, subject to the outside temper-ature (dual mode temperature) and heat load.

NoteThat part of the electric power drawn by the instantaneous heating water heater will generally not be charged at special tariffs.

Sizing of typical system configurations: The heat pump heating output must be designed for approx. 70 to

85 % of the maximum required heat load of the building in accord-ance with DIN EN 12831.

The heat pump covers approx. 95 % of the annual heat load. Blocking periods must not to be taken into consideration.

NoteCompared to mono-mode operation, the heat pump will run for longer due to its smaller size. To compensate for this, increase the size of the

heat source for brine/water heat pumps.For a geothermal probe system, an annual extraction rate of 100 kWh/m p.a. should not be exceeded.

Instantaneous heating water heater (on site) An electric instantaneous heating water heater can be integrated in theheating water flow as an auxiliary heat source. The instantaneousheating water heater is connected and protected via a separate power supply connection.

The heat pump control unit regulates this function. The instantaneousheating water heater can be enabled separately for central heating andDHW heating.If enabled the respective parameter, the heat pump control unit starts

stages 1, 2 or 3 of the instantaneous heating water heater, subject tothe prevailing heat demand. As soon as the maximum flow tempera-ture in the secondary circuit is reached, the heat pump control unitswitches the instantaneous heating water heater off.Parameter "Stage at power-OFF" restricts the output stage of theinstantaneous heating water heater for the duration of the power-OFFperiod.To limit the total power consumption, the heat pump control unit stopsthe instantaneous heating water heater for a few seconds directlybefore the compressor starts. Each stage is subsequently started indi-vidually one after the other in intervals of 10 s.If the instantaneous heating water heater is on and the differentialbetween flow and return temperatures in the secondary circuit doesnot rise by at least 1 K within 24 h, the heat pump control unit displaysa fault message.

Dual mode operation

External heat sourceThe heat pump control unit enables the heat pump to operate in dualmode with an external heat source, e.g. oil boiler.The external heat source is hydraulically connected to let the heatpump also be used as a return temperature raising facility for the boiler.System separation is provided either with a low loss header or heatingwater buffer cylinder.For optimum heat pump operation, the external heat source must beintegrated via a mixer into the heating water flow. A quick reaction isachieved by directly controlling this mixer via the heat pump controlunit.If the outside temperature (long-term average) is below the dual modetemperature, the heat pump control unit starts the external heatsource. In case of direct heat demand from the consumers (e.g. for frost protection or if the heat pump is faulty), the external heat sourceis also started above the dual mode temperature.

In addition, the external heat source can be enabled for DHW heat-ing.

NoteThe heat pump control unit does not contain any safety function for the external heat source. To prevent excessive temperatures in theheat pump flow and return in case of a fault, high limit safety cut-outsmust be provided to stop the external heat source (switching threshold 70 C).

Supplement for DHW heating

For general house building, a max. DHW consumption of approx.50 litre per person per day at approx. 45 C is assumed. This represents an additional heat load of approx. 0.25 kW per per-

son given a heat-up time of 8 h. This supplement will only be taken into consideration if the sum total

of the additional heat load is greater than 20 % of the heat load cal-culated in accordance with DIN EN 12831.

DHW demand at a DHW temper-ature of 45 C

Specific available heat Recommended heat load sup-plement for DHW heating *1

in l/d per person in Wh/d per person in kW/personLow demand 15 to 30 600 to 1200 0.08 to 0.15

Standard demand*2 30 to 60 1200 to 2400 0.15 to 0.30

*1 With a DHW cylinder heat-up time of 8 h.*2 Select a higher supplement if the actual DHW demand exceeds the stated values.



3


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or Reference temperature of 45 C

Specific available heat Recommended heat load sup-plement for DHW heating *1

in l/d per person in Wh/d per person in kW/person Apartment(billing according to demand)

30 approx. 1200 approx. 0.150

Apartment(flat rate billing)

45 approx. 1800 approx. 0.225

Detached house *2

(average demand)50 approx. 2000 approx. 0.250

Supplement for setback mode A supplement for setback mode in accordance with DIN EN 12831 isnot required as the heat pump control unit is equipped with a temper-ature limiter for setback mode.In addition, the control unit is equipped with start optimisation, whichmeans that there is also no need for a supplement for heating up fromsetback mode.

Both functions must be enabled in the control unit. If any of the sup-plements are omitted because of the activated control unit functionsthen this must be documented when the system is handed over to theoperator.If these supplements are to be taken into account in spite of the controloptions, calculate them in accordance with DIN EN 12831.

3.6 Heat source for brine/water heat pumps

Frost protectionTo safeguard a trouble-free heat pump operation, use anti-freezebased on glycol in the primary circuit. This must protect against frostdown to at least -15 C and contain suitable anti-corrosion inhibitors.Ready-mixed solutions ensure an even distribution of concentrate.For the primary circuit, we recommend the ready-mixed solution "Tyfo-cor" which is based in ethylene glycol.

NoteWhen selecting the anti-freeze, always observe the stipulations of theauthorising body.

Geothermal collector The thermal properties of the upper layer of the earth, such as the

volumetric thermal capacity and thermal conductivity, are largelydependent on the consistency and properties of the ground.The wetter the soil, the higher the proportion of mineral constituents(quartz or feldspar) of the soil and the smaller the proportion of pores,the better the storage characteristics and thermal conductivity.The specific extraction rate q E for the ground lies between approx. 10and 35 W/m 2.

Dry sandy soil qE = 1015 W/m 2

Damp sandy soil qE = 1520 W/m 2

Dry loamy soil qE = 2025 W/m 2

Damp loamy soil qE = 2530 W/m 2

Ground with groundwater qE = 3035 W/m 2

These details enable the required ground area to be calculated subjectto the heat load of the building and the refrigerating capacity K of theheat pump. K = WP P WP K is the difference between the heat pump heating output ( HP ) andits power consumption (P HP ).

Manifolds and headersThe manifold and the header should be installed so that they areaccessible for future inspections, e.g in their own distribution ductsoutside the house or in the basement window duct.Every pipe circuit should be able to be isolated individually on the flowand return side to enable the collector to be filled and vented.

1500 mm

C

F FD E

AB

GH

1 . 2 -

1 . 5 m

Example of a common duct

A Access point 7 600 mmB Concrete ringsC Primary flowD Primary returnE Brine distributor F Collector pipesG Crushed stoneH Drainage

*1 With a DHW cylinder heat-up time of 8 h.*2 Select a higher supplement if the actual DHW demand exceeds the stated values.




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2

Example of a wall outlet

A To the heat pumpB BuildingC FoundationsD DrainageE SealF Pipe liner G Crushed stoneH PE 32 3.0 (2.9)K Ground

All pipes, profiles etc. must be made from corrosion-resistant materi-als. Flow and return lines transport cold brine (brine temperature 3.0 W/(m K))

70

Individual rocks Gravel, sand (dry) < 20Gravel, sand (aquiferous) 55-65Clay, loam (damp) 30-40Chalk (solid) 45-60

Sandstone 55-65 Acidic magmatite (e.g. granite) 55-70Basic magmatite (e.g. basalt) 35-55Gneiss 60-70

Rough sizingBasis for sizing is the refrigerating capacity K of the heat pump atoperating point B0/W35 .Required probe length l = K/ E ( E = average extraction rate subjectto ground conditions).The detailed sizing depends on the ground structure and the water-carrying ground strata, and can only be determined following a localinspection by the drilling contractor.

NoteThe reduction of the number of drilled holes in favour of probe depthincreases the pressure drop to be overcome and the required pumprate.

Information regarding dual mode parallel and mono-energetic operationIn case of dual mode parallel and mono-energetic operation, consider the higher heat source load (see "Sizing"). As a guide, a geothermal

probe system should not exceed an extraction of 100 kWh/m a p.a.

Required geothermal probes and brine distributors at E = 50 W/m, probe (to VDI 4640) for 2000 operating hours (estimated sizing)Heat pump type K PE 32 2.9

Overall pipe length Geothermal probes Brine distributor kW m Length in m Part no.

Single stage heat pumpBW 121 17 340 4 85 2 7143 763BW 129 23.3 466 5 93 1 7143 763

2 7373 329BW 145 34.2 820 8 103 4 7143 763Two-stage, both stages with the same outputBW+BWS 121+121 34 820 8 103 4 7143 763BW+BWS 129+129 46.6 1120 11 102 on-siteBW+BWS 145+145 68.4 1640 17 96 on-siteTwo-stage, stages with different outputBW+BWS 121+129 40.3 970 10 97 on-siteBW+BWS 121+145 51.2 1230 13 95 on-site

BW+BWS 129+145 57.5 1380 14 99 on-site



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Brine distributors for two-stage heat pump (BW+BWS) and singlestage heat pump type BW 145 The brine distributors for geothermal probes must be designed and sized by a specialist contractor (e.g. Viessmann geothermal depart-ment or an engineering consultancy). The guide values given aboveinclude an additional 20 %.

Example calculations for sizing the heat source

Selection of the heat pump

Building heat load (net heat load) 4.8 kWDHW heating supplement for a 3-person household

0.75 kW (see chapter "DHW heating supplement": 0.75 kW < 20 % of building heatload)

Power-OFF periods3 2 h/d (only 4 h are taken into consideration, see chapter "Mono-mode opera-tion")

Total heat load of the building 5.76 kWSystem temperature (at min. outside temp. 14 C) 45/40 CHeat pump operating point B0/W35

The heat pump with a heating output of 6.2 kW (incl. supplement for power-OFF periods, excl. DHW heating), refrigerating capacity K = 4.9 kW corresponds to the required output.

Sizing the geothermal probe as double U-pipe Average extraction rate E= 50 W/m probe length K = 4.9 kWProbe length L = K/ E = 4900 W/50 W/m = 98 m 100 mSelected pipe for the probe: PE 32 3.0 (2.9) with 0.531 l/m

Required amount of heat transfer medium (V R)Take the content of the geothermal probe including all supply lines, plus the volume of fittings and the heat pump into consideration.Provide manifolds when using > 1 probe. Size the supply line larger than the pipe circuits; we recommend PE 32 to PE 63. Geothermal probe as double U-shaped pipe Supply line: 10 m (2 5 m) with PE 32 3.0 (2.9)

VR = 2 Probe length L 2 Pipeline volume + Supply line length Pipeline volume= 2 100 m 2 0.531 l/m + 10 m 0.531 l/m = 217.7 l

Selected: 220 litre (incl. heat transfer medium in the fittings and the heat pump)

Pressure drop of the geothermal probeHeat transfer medium: Tyfocor Flow rate, heat pumps with 6.2 kW: 900 l/hFlow rate per U-shaped pipe: 900 l/h : 2 = 450 l/h

p = R value pipe length R value (resistance value) for PE 32 3.0 (2.9) (see tables Pressuredrop for pipelines): At 450 l/h 46.9 Pa/m At 900 l/h 190 Pa/m

p Double U-shaped pipe probe = 46.9 Pa/m 2 100 m = 9380 Pa p Supply line = 190 Pa/m 10 m = 1900 Pa p permissible = 40000 Pa = 400 mbar (max. ext. pressure drop, primary side) p Double U-shaped pipe probe + p supply line = 9380 Pa + 1900 Pa = 11280 Pa 112 mbar

Result:The intended geothermal probe can be used with a heat pump with 6.2 kW rated heating output, since p =

p double U-shaped pipe probe + p supply line does not exceed the value for p permissible .

Expansion vessel for primary circuit A diaphragm expansion vessel with a capacity of 25 l is sufficient upto a supply line length of 20 m and up to a size of PE 40.

Detailed calculations are required for greater lengths.

V A = Total system volume (brine) in litresVN = Rated volume of the diaphragm expansion vessel in litresVZ = Increase in volume during system heat-up in litres

= V A = Expansion factor ( for Tyfocor = 0.01)

VV = Safety hydraulic seal (heat transfer medium Tyfocor) in litres= V A (hydraulic seal: 0.005), at least 3 l (to DIN 4807)




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pe = Permiss. terminal pressure in bar = p si 0.1 p si = 0.9 p si

p si = Safety valve blow-off pressure = 3 bar VN = VZ + VV

P e P st (P e + 1)

p st = Nitrogen pre-charge pressure = 1.5 bar

Expansion vessel capacity for geothermal collector V A= Geothermal collector content incl. supply line + heat pump content = 130 lVZ = V A = 130 l 0.01 = 1.3 lVV = V A 0.005 = 130 l 0.005 = 0.65 l selected 3 l

1.3 litres + 3.0 litres2.7 bar 1.5 bar (2.7 bar + 1) = 13.25 litresVN =

Expansion vessel capacity for geothermal collector V A= Geothermal collector content incl. supply line + heat pump content = 220 lVZ = V A = 220 l 0.01 = 2.2 lVV = V A 0.005 = 220 l 0.005 = 1.1 l selected 3 l

2.2 litres + 3.0 litres2.7 bar 1.5 bar (2.5 bar + 1) = 15.17 litresVN =

Pipework, primary circuit

Pressure dropThe areas in the following tables with a grey background are subjectto laminar flow, thereafter turbulent flow.For optimum heat extraction from the ground, we recommend sizingthe pipework in the turbulent area.

R value (resistance value): R value = pressure drop/m line The specified R values refer to Tyfocor heat transfer medium:

Kinematic viscosity = 4.0 mm 2/s Density = 1050 kg/m 3

PE pipe 20 2.0 mm, PN 10Flow rate R value for Tyfocor l/h Pa/m

100 77.4120 92.9140 108.4160 123.9180 139.4200 154.9220 170.3240 185.8260 201.3280 216.8300 232.3320 247.8340 263.3360 278.7380 294.2400 309.7


100 27.5120 32.9140 38.4160 43.9180 49.4200 54.9220 60.4240 65.9260 71.4280 76.9300 82.3320 87.8340 93.3360 98.8380 104.3400 109.8420 115.3440 120.8460 126.3480 131.7500 137.2520 142.7540 246.3560 262.4


300 31.2320 33.3340 35.4360 37.5

380 39.5400 41.6420 43.7440 45.8460 47.9480 49.9



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Flow rate R value for Tyfocor l/h Pa/m

500 52.0520 54.1540 56.2560 58.3580 60.3600 62.4620 64.5640 66.6660 68.7680 70.7700 122.5720 128.7740 135.0760 141.5780 148.1800 154.8820 161.6840 168.6860 175.7880 182.9900 190.2920 197.7940 205.3960 213.0980 220.8

1000 228.71020 236.81040 245.01060 253.31080 261.71100 270.21120 278.91140 287.71160 296.61180 305.61200 314.71240 333.31280 352.31320 371.81360 391.71400 412.11440 433.01480 454.21520 475.91560 498.11600 520.61640 543.61680 567.0

1720 590.91760 615.11800 639.81840 664.91880 690.41920 716.31960 742.62000 769.3


1500 165.81600 209.62000 274.0

2100 305.52300 383.62400 389.12500 404.22700 479.5


1500 56.91600 61.72000 96.02100 102.82300 117.82400 128.82500 141.82700 163.73000 189.13200 216.53600 202.83900 315.14200 356.25200 530.25400 569.95500 596.06200 739.86300 771.37200 1000.17800 1257.79200 1568.79300 1596.1

12600 2794.815600 18600


1500 17.81600 25.32000 30.1

2100 34.02300 42.72400 45.22500 48.02700 56.23000 63.03200 69.93600 84.93900 102.84200 121.95200 161.75400 187.75500 191.86200 227.46300 239.8

7200 316.57800 367.29200 493.29300 509.6

12600 956.315600 1315.218600 1808.4




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Volumes in PE pipes, PN 10

External pipe wallthickness

DN Volume per m pipe

mm l20 2.0 15 0.20125 2.3 20 0.32732 3.0 (2.9) 25 0.53140 2.3 32 0.98440 3.7 32 0.83550 2.9 40 1.59550 4.6 40 1.30863 5.8 50 2.07063 3.6 50 2.445

Pump output supplements (percentage) for operation with Tyfocor

NoteCirculation pump curves, see chapter "Primary pump".

Design flow rate A = water + f Q (in %)Design residual headH A = H water + f H (in %)Select the pump with the higher pump rates A and H A.

NoteThe supplements only comprise the corrections for the circulation

pumps. System curve or data corrections can be determined with thehelp of technical literature or information provided by the valve manu-facturer.Viessmann heat transfer medium "Tyfocor" (ready-mixed for temper-atures down to 15 C) has a ethylene glycol volume ratio of 28.6 %(calculated as 30 %).

Volume ratio ethylene glycol % 25 30 35 40 45 50At an operating temperature of 0 C

f Q % 7 8 10 12 14 17 f H % 5 6 7 8 9 10At an operating temperature of +2.5 C

f Q % 7 8 9 11 13 16

f H % 5 6 6 7 8 10At an operating temperature of +7.5 C

f Q % 6 7 8 9 11 13 f H % 5 6 6 6 7 9

3.7 Heat source for water/water heat pumps

Groundwater Water/water heat pumps utilise the energy content of groundwater or cooling water.



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D

B

H

F

K

LM

O

N

G

E F

A

-14.0 mmin. 5 m

-12.0 m-14.0 m

-15.0 m-16.0 m

-20.0 m-21.0 m

-23.0 m-24.0 m

-15.0 m

-11.0 m

approx. 1.3 m

C

A Flow limiter, well circuitB Primary pump (integrated subject to type)C To the heat pumpD Frost stat, primary circuitE Heat exchanger, primary circuitF Well shaftG Supply pipe

H Non-return valveK Well pumpL Delivery wellM Flow direction of the groundwater N Return wellO Pressure pipe

Water/water heat pumps achieve high performance factors. Ground-water offers an almost constant temperature of 7 to 12 C all year round. Therefore the temperature level needs to be raised only a littlehigher (compared to other heat sources) in order for it to be able to beutilised for heating purposes.Depending on the design, the heat pump cools the groundwater by upto 5 K, although its consistency remains otherwise unchanged. On account of the costs for pumping systems, for detached houses

and two-family homes, we recommend the pump groundwater fromdepths of not more than approx. 15 m (see the above diagram). For commercial or large scale systems pumping from even greater depths could still be viable.

Maintain a distance of 5 m between the point of extraction (deliverywell) and the point of re-entry (return well). Supply and return wellsmust be located in the line of flow of the groundwater to prevent a"flow short circuit". Construct the return well so that the water exitsbelow the groundwater level.

Due to fluctuating water quality, we generally recommend a systemseparation between wells and heat pump.

The groundwater flow and return lines to/from the heat pump mustbe protected against frost and must slope towards the well.

Calculating the required groundwater volumeThe required ground water flow rate depends on the heat pump outputand the rate of ground water cooling.For the minimum flow rates, see the heat pump specification (e.g.minimum flow rate for Vitocal 300-G, type WW 121 = 5.2 m 3/h).

When sizing the primary pumps observe that higher flow rates resultin increased internal pressure drop.

Permits for a groundwater/water heat pump systemThis project requires permission from the "local water authority" [checklocal regulations].Where buildings must be connected to the public water system, theutilisation of the groundwater as a heat source for heat pumps must

be authorised by your local authority [check local regulations].

Permits can be subject to certain stipulations.




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Sizing the heat exchanger, primary circuit/separating heat exchanger

8 C

6 C 4 C

10 C

A B

A Water B Brine (antifreeze mixture)

NoteFill primary circuit with anti-freeze mixture (brine, min. 5C).

The operational reliability of a water/water heat pump improves whenit is used with a primary circuit heat exchanger. Subject to the correctsizing of the primary pump and the optimum layout of the primary cir-cuit, the coefficient of performance of the water/water heat pump willbe reduced by a maximum of 0.4.We recommend the use of the threaded stainless steel plate heatexchanger from the Viessmann Vitoset pricelist (manufacturer: Tranter

AG); see the following selection table.

Selection list for plate heat exchangers for water/water heat pumpsHeat pump Refrigerating

capacityPlate heatexchanger (threaded)

Flow rate Pressure dropWell circuit Primary circuit Well circuit Primary circuit

Type kW Part no. m3

/h m3

/h kPa kPaSingle stage heat pumpWW 121 23.7 7248 338 5.09 5.44 20 25WW 129 31.4 7248 339 6.74 7.21 25 30WW 145 48.9 7199 407 10.49 11.23 20 30Two-stage, both stages with the same outputWW+BWS121+121

47.4 7199 407 10.17 10.88 20 30

WW+BWS129+129

62.8 7199 409 13.48 14.42 20 30

WW+BWS145+145

97.8 7199 410 20.99 22.46 20 30

Two-stage, stages with different outputWW+BWS121+129

55.1 7199 408 11.82 12.65 20 30

WW+BWS121+145

72.6 7199 409 15.58 16.67 20 30

WW+BWS129+145

80.3 7199 410 17.23 18.44 20 30

Cooling water If cooling water from an industrial waste heat process is used as heatsource for a water/water heat pump, observe the following:

The water quality must be within the limit values (see "Basic princi-ples", chapter "Heat recovery from groundwater", table "Resis tanceof copper soldered or welded stainless steel plate heat exchangersto substances contained in the water").

If the water quality falls outside these limits, use a stainless steelheat exchanger in the primary circuit (see table on page 45). Sizingis carried out by the manufacturer of the heat exchanger.

The available amount of water must satisfy the minimum flow ratesof the primary side of the heat pump (see specification). The max. inlet temperature for water/water heat pumps is 25 C.

With higher cooling water temperatures, low-end controllers (e.g. asoffered by Landis & Staefa GmbH, Siemens Building Technologies)on the primary side of the heat pump must limit the max. inlet tem-perature to 25 C by adding cool return water.

NoteThe utilisation of cooling water is also possible in conjunction with abrine/water heat pump. The max. inlet temperature must then be limited to 25 C as for the water/water heat pump.



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RL

VL

RL

A

vitocal 300-g technicalguidefeb2010

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