user, installation & servicing instructions wh204/wh205with cibse guides and bre digest 398....

Please leave these instructions with the user

Whole House Ventilation Systemwith Heat Recovery and Cooker Hood (HR205)

User, Installation & ServicingInstructions

2

Contents

Section

1.0 User Information

2.0 General Layout

3.0 Technical Data

4.0 Appliance Operation

5.0 Installation Requirements

6.0 Installation

7.0 Wiring Diagrams

8.0 Commissioning

9.0 Maintenance

10.0 Changing Components

11.0 Fault Finding

12.0 Short Parts List

Page

3

6

8

10

11

14

18

22

24

26

30

35

3


The HR204 (Fig. 1) and HR205 (Fig. 2) arewhole house ventilation units.

This appliance must be installed in accordancewith the manufacturers’ instructions and theregulations in force.

Duct systems must be installed in accordancewith CIBSE guides and BRE Digest 398.

Read the instructions fully before installing orusing the appliance.

Warning : The ventilation for any openflued appliance must always beconsidered before siting the extract andinlet vents, the vents must also be sitedaway from other flue terminals, ventilatorsetc. on the outside of the dwelling. Inaddition there shall be adequateventilation of the room when the cookerhood is used at the same time asappliances burning gas or other fuel. Theexhaust air duct must not be dischargedinto a flue which is used for exhaustingfumes from appliances burning gas orother fuels. Refer to the relevant currentBritish Standard Codes of Practice, Part Jof the Building Regulations England andWales and Part F of the BuildingStandards (Scotland) Regulations.

4


• HR204

Important: The HR204 is not suitable forinstallation above any cookingappliance.

The HR204 is a mechanical ventilationwith heat recovery (MVHR) unit. The unitprovides continuous extraction of stale airfrom the dwelling typically from thebathroom and from the kitchen. The staleair passes through the heat exchangerbefore being ducted to outside.

Fresh air from the outside is continuouslydrawn into the unit and passed through afilter and then into the heat exchanger. Inthe heat exchanger the fresh air is pre-warmed and ducted into the dwellingtypically to living rooms/ bedrooms.

• HR205

The HR205 is a mechanical ventilationwith heat recovery (MVHR) unit, designedsolely to operate with the Vent-Axia telescopiccooker hood. The unit provides continuousextraction of stale air from the dwellingtypically from the bathroom and thekitchen. The stale air passes through theheat exchanger before being ducted tooutside.

Fresh air from the outside is continuouslydrawn into the unit, passed through a filterand then into the heat exchanger. In theheat exchanger the fresh air is pre-warmed and ducted into the dwellingtypically to living rooms/ bedrooms.

When the telescopic hood is extended theMVHR unit switches automatically toboost. The hood draws steam and fumesfrom cooking through metal filters anddirect to outside.

Important: The cooker hood mustalways be fully opened when the cooker/hob is in use.

Warning: Do not flambé under thecooker hood

5


Cleaning the Unit

Warning: Disconnect from mains electricalsupply before cleaning any components.

Note: It is important that any door orcupboard front covering the MVHR unit iseasily removable by the user as access forregular cleaning of the air filters and heatexchanger is required.

Warning: Failure to clean the cooker hoodand its filters as described below will leadto a fire risk.

The cooker hood and filters should bechecked and cleaned every 3 months.

1.1 Heat Exchanger - HR204 & HR205

1. Lift off the front door panel by releasing thetwo hand screws and lifting upwards.

2. Note how the heat exchanger is fitted and byusing the plastic strap pull forwards to remove.

3. If necessary the heat exchanger can bewashed in warm water using a mild detergent.Take care not to damage the fins. Re-assemblein reverse order after thoroughly drying.

1.2 Air Inlet Filter - HR204 & HR205

Fig. 41. Lift off the front door panel by releasing thetwo hand screws and lifting upwards.

2. Remove the air inlet filter by pulling forwards.

3. Carefully brush and vacuum the filter in a wellventilated area.

4. Re-assemble in reverse order.

1.3 Cooker Hood Filters - HR205

Fig. 51. Rear Filter - To remove the rear filter grip andpull inwards the grey handles at either side andslide the filter forwards and downwards.

2. Front Filter - To remove the front filter grip andpull inwards the grey handles at either side anddrop the filter downwards.

3. The filters can be washed in a dishwasher orin warm soapy water. Thoroughly dry the filtersand re-assemble in reverse order.

Note: For spare parts see Section 12.

Warning

WiringService

FRONT

UP

Pull forward & removethe outer case

Release handfastners

Use strap to pullout heatexchanger.

Remove the cooker hood filters for cleaning

View from below the unit

Air inletfilter pullout, brush& vacuumclean

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FRONT

UP

HR205

Fig. 5

Fig. 3

Fig. 4

6

2.0 General Layout

Cover Panels removed for clarity.

1. Heat Exchanger (Lexan)

2. Fan (Fresh Air In)

3. Fan Capacitor (RH)

4. Electrical Control/Transformer

5. Fuse (3.15amp fast blow)

6. Terminal Block

7. Overheat Sensor

8. Lower Fixing Hole

9. Fire Damper

10. Condensate Drain (15mm)

11. Condensate Tray

12. Alternative outlet for condensate

13. Fan (Extraction)

14. Fan Capacitor (LH)

15. Inlet Air Filter

16. Air Connections (4 off)

Fig. 6

HR205

7

2.0 General Layout

HR 204

Cover Panels removed for clarity

1. Heat Exchanger (PVC)

2. Fan (Fresh Air In)

3. Fan Capacitor (RH)

4. Electrical Control/Transformer

5. Fuse (3.15amp fast blow)

6. Terminal Block

7. Lower Fixing Hole

8. Alternative outlet forcondensate (bottom)

9. Condensate Drain (15mm)

10. Condensate Tray

11. Alternative outlet forcondensate (side)

12. Fan (Extraction)

13. Fan Capacitor (LH)

14. Inlet Air Filter

15. Air Connections (4 off)

Fig. 7

8

3.0 Technical Data

HR205 HR204Including cooker hood

Dimensions (mm)Height 458 412Width 598 552Depth 285 285

Min. Clearances (mm)Both sides 1 5Above casing 200 200Below casing 700 100Front for servicing 250 250Front in operation None None

Lift weight (kg) 20.6 16.7

Voltage tappings Power consumption (watts) Power consumption (watts)Lights off Lights on

80 16 96 16100 27 107 27120 40 120 40140 52 132 52160 65 145 65230 111 191 111

Duct connections All suitable for 100mm circular ductsCondensate connection Suitable for 15mm pipe

Electrical supply 230v – 50Hz appliance must be connected to an earthed supply

External fuse rating 3 ampsInternal fuse rating Transformer - 3.15 F

Filtration EU2

9

3.0 Technical Data

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22A

The MVHR unithas five normal

fan speedsettings andone boost

setting. Theperformancecurve chart

gives theventilation rates

at each fanspeed setting

compared to thepressure dropof the system.

0

50

100

150

300

350

250

200

0 2010 30 50 7040 60 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230

100Pa @100m³/Hr

240

Pres

sure

/ Pa

Flow rate / m³ / hr

Flow Rate Vs Pressure Chart

80v

100v

120v

140v

160v

230v

Fig. 8

Fig. 9

10

4.0 Appliance Operation

• HR204

When the electricity is switched on the externalcontrols (humidstat or normal/boost switch)supply electricity to the fans.

On normal running the fans run at the voltageset during commissioning (80,100,120,140 or160 volts).

Air is then moved through the unit (see Fig 8) Ifthe fans become jammed then a thermal trip inthe fan senses temperature rise and breaks theelectrical supply to the motor. This can only bereset by disconnecting from the mainssupply.

If the external controls call for boost operationthe fans automatically run at 230 volts andincrease the air movement of both exhaust andinlet air.

• HR205

When the electricity is switched on the unitchecks for continuity across the overheatthermostat.

The fans then run at the voltage set duringcommissioning (80,100,120,140 or 160 volts).

Air is then moved through the unit (see Fig 8) Ifthe fans become jammed then a thermal trip inthe fan senses temperature rise and breaks theelectrical supply to the motor. This can only bereset by disconnecting from the mainssupply.

If the overheat thermostat senses an elevatedrise in temperature from the cooker/hob it breaksthe electrical supply to the fans. The overheatthermostat can only be reset bydisconnecting the mains supply to the unit.

In the event of a serious fire at the hob (e.g. chippan fire) the in built fire damper will operatesealing the clean air side of the unit from the fire.

Continuous extracttypically from

bathroom/kitchen.

Continuous supplyingof fresh filteredair typically to

living room/ bedroom.

Lights on the CookerHood can be used.

Optional ExtrasExternal Controls

Normal/boostSwitchNBSW

Normal/boostPull Switch

PCSW

Humidity SensorHS6

CookerHoodOpen

CookerHood

ClosedIncreased extract rates,

also extract fromCooker Hood.

Increased supply toliving room/bedroom.

Lights on the CookerHood can be used.

Power ON

Normal Operation

Fans run in wholehouse mode at 80, 100,120, 140, or 160 Volts.

Boost Operation

Fans run at 230 Volts.

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Normal

Boost

Fig. 10

11


5.1 Location

1. The cooker hood MVHR unit is only suitablefor installation above a domestic cooker ordomestic hob. The HR205 must be sited aminimum of 700 mm above the cooker/hob.

2. The exhaust duct must pass through anoutside wall or roof and discharge to atmospherein a suitable position .The clean air inlet ductmust pass through an outside wall or roof and besuitably positioned to provide an adequate freshair supply from atmosphere.

5.2 Site requirements

1. For the HR205 a flat vertical area 1332mmhigh x 600mm wide is required for installation.

For the HR204 a flat vertical area 692mm high x562mm wide is required for installation.

Important: The HR204 is not suitable forinstallation above any cooking applianceor with any extraction system servicinga cooking appliance.

2. Before installation consideration must begiven to the position of the ductworkconnections, the electrical connection and thecondensate pipe connection.

Warning: Please check the information onthe data plate is compatible with localsupply conditions.

3. The installation must be carried out by acompetent person and be in accordance with therelevant Building regulations (Scotland)(consolidation), the Local building regulations,the current I.E.E. Wiring regulations.

Reference should also be made to the BREdigest 398 and CIBSE guidelines.

Warning: The addition of anything thatmay interfere with the normal operation ofthe appliance without the express writtenpermission of Vent-Axia Ltd couldinvalidate the appliance warranty andinfringe regulations.

Warning: If the unit is fitted in a roomcontaining a bath or shower thenreference should be made to the currentI.E.E. Wiring Regulations and BuildingRegulations.

12


5.3 General

1. The MVHR unit has five normal fan speedsettings and one boost setting. Theperformance curve chart (Section 3, Fig. 8)gives the ventilation rates at each fan speedsetting compared to the pressure drop of thesystem.

2. The transmission of noise along ducts shouldbe reduced by fitting noise attenuation ductsPart No. FS100.

5. 4 Ducting

1. The outside exhaust duct and outside airintake duct should be sited a minimum of 1metre apart to minimise the risk of contaminatedair being drawn into the house.

2. The duct work system should be sized andinstalled to minimise the pressure loss along it.

3. Using larger diameter pipes and keeping thenumber of bends and fittings used to a minimumwill reduce the pressure drop and allow the unitto be set at a lower fan speed.

4. Ducting should be insulated in cold areas tominimise heat losses. All duct joints should besuitably taped to ensure an air tight seal.

WH

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10A

Exh

aust

ou

t

Fre

sh a

ir in

Ho

t st

ale

air

in

War

m a

ir o

ut

Examples of different ducting & fittings

NQT100

NQT100

IQTB45

IQTB90

RD

104W

HR

D10

4WH

IQTB45IFD100

NQT40

1m

NQT100

1m

0.25m

or

NQT100

NQT40

OR

RD060

RD060

RD015

RD015

EV100

SV100

RD015

RD070

Bathroom

LivingRoom

1.5m

Terminalsminimum1m apart

OutsideWall

HR205Fig. 13

13


Warning : The ventilation for any openflued appliance must always beconsidered before siting the extract andinlet vents, the vents must also be sitedaway from other flue terminals, ventilatorsetc. on the outside of the dwelling. Inaddition there shall be adequateventilation of the room when the cookerhood is used at the same time asappliances burning gas or other fuel. Theexhaust air duct must not be dischargedinto a flue which is used for exhaustingfumes from appliances burning gas orother fuels. Refer to the relevant currentBritish Standard Codes of Practice, Part Jof the Building Regulations England andWales and Part F of the BuildingStandards (Scotland) Regulations.

5.5 System controls

1. An optional Humidistat (HS6) Part No. 370254is available for automatic boost control.

2. An optional boost switch (NBSW) Part No.370495 is available for manual/boost controlremote from the unit. An optional pull cord boostswitch (PCSW) Part No. 370278 is available formanual/boost control remote from the unit.

5.6 Electrical supply

1. External wiring must be correctly earthed ,polarised and in accordance with the currentI.E.E. Regulations.

2. The mains supply must be 230v ~ 50Hz fusedat 3amps

Note: The method of connection to themains supply must facilitate completeelectrical isolation of the appliance.Connection may be via a fused doublepole isolator with a contact separation ofat least 3mm in all poles and supplying theMVHR unit and its system controls only.

5.7 Condensate drain

1. The condensate pipe should have acontinuous fall of 10° (1 in 6) with as much of thecondensate pipe as possible run inside theproperty to avoid freezing. The pipe should alsoincorporate a trap with a minimum height of75mm. See Fig. 17.

2. The HR205 has two alternative condensateoutlet positions: - rear and left hand side. TheHR204 has three condensate outlet positions: -rear, bottom and left hand side.

Fig. 14

14

Exhaust

Out

Fresh Air

In

Hot Stale

Air In

Warm Air

Out

Measure 700mmfrom hob

HR205

HR204

Top of hob

Example of a possibleunderstairs installation

Mark out theposition of the

unit of theWall Template

Ground Floor

Stair Case

Make sure the WallTemplate is level

Mark positionof the

condensatepipe 15 mm(drill whererequired)

Mark positionof the

fixing holes2 top (minimum)

& 1 lowerthen drill & plug

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Wall Template HR204 &HR205 (with cooker hood)

Whole House Ventilation System

ExhaustOut

Fresh AirIn

Hot StaleAir In

Warm AirOut

MinimumTop

Clearance200mm

Part No. 372706

98mm

Cooker Hood

Bottom ofMVHR Unit

Bottom ofCooker Hood

Top ofMVHRUnit

Bottom ofMountingBrackets

4 Fixing Holes(Key Holes)

Use onehole each side

BottomFixing Hole

Back CaseCondensate Hole

Side Case KnockOut Condensate Hole

Minimum SideClearance 1mm

Minimum SideClearance 1mm

Bottom CondensatePipe Exit (HR204 Only)

Minimum Bottom Clearance100mm

(HR204 Model)

Minimum SideClearance

24mm(HR205c)


5mm(HR204)

MVHRSide


24mm(HR205c)


5mm(HR204)

MVHRSide

All dimensionsin mm

Minimum TopClearance

for servicing200

MinimumSide

Clearance5

MinimumSide

Clearance5

ClearancesHR204 Minimum Bottom

Clearance100

MinimumFront

Clearancefor

servicing250

280

ClearancesHR205c

MinimumSide

Clearance(MVHR)

24

MinimumSide

Clearance(MVHR)

24 MinimumTop Clearancefor servicing

200300

MinimumFront

Clearancefor servicing

250

Minimum BottomClearance from Hob

700

MinimumSide

Clearance(C.Hood)

1

Measure MinimumBottom Clearance

700mmFrom Hob

(HR205c Model)

MainsCableOutlet

6.0 Installation

6.1 Preparation

1. Check site requirements (Section 5) beforecommencing.

2. Remove the fixing template from the MVHRcarton.

After considering the site requirements positionthe template on the wall ensuring it is level.

3. Mark the positions of at least two top fixingholes, the lower fixing hole and the condensateoutlet.

If required mark off the positions of the four ductconnections.

4. Drill and plug the wall at the fixing pointsand drill the condensate hole.

5. The top two screws should now be fittedleaving enough space for the keyhole fixing slotsto engage.

6. Place the MVHR unit on its back (Fig. 15). Liftoff the front door panel by releasing the twohand screws and lifting upwards.

7. Remove the bottom electrical cover byreleasing the 3 screws, pulling the panelforwards and disconnecting the earth lead to thepanel.

Fig. 15

15

6.0 Installation

6.2 Assembly of the MVHR unit and thecooker hood - HR205 only.

1. Unpack the cooker hood, locate the fourscrews and washers and the protective box forthe cooker hood plug and socket.

2. Open out the telescopic hood and remove thetwo metal filters by releasing the grey plasticsprings and sliding out.

3. Offer up the hood to the MVHR unit andcarefully feed the cable and four pin cooker hoodsocket through the hole in the back right handside of the MVHR unit.

4. Align the cooker hood and attach it to theMVHR unit using the four screws provided.

Note: it will be necessary to support thetelescopic hood when attaching it to theMVHR unit.

5. Carefully route the cooker hood cable andsocket into the MVHR unit and engage it with theplug ensuring the locating lugs align.

It is important that the cables are routed awayfrom the cooker hood outlet and fire damper.

6. Locate the assembled plug and socket in theprotective box taking care to route the cables asshown (Fig. 16). Clip the box together andsecure using the screws provided. Locate thelarge cable grommet in the hole and ensure it isseated correctly.

6.3 Condensate outlet

1. If the condensate pipe is to exit the unit at theleft hand side, stand the unit up on its basetaking care not to damage the telescopic hoodand filters.

2. Locate the semi-pierced hole and carefullyremove the metal disc.

3. Swap over the grommet used on the rear exithole and seal the rear hole with duct tape orsimilar.

Note: The HR204 has an extra condensateoutlet on the bottom panel.

Fig. 16

Secure Cooker Hood to MVHRUnit with 4 screws supplied

Top View (MVHR Unitplaced on it's back)

Warning

MVHRUnit

ConnectCookerHood

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Grommet

Correct route for cooker hood cableconnection (HR205)

CableClips

Removethe

CookerHoodfiltersbeforefitting

CookerHood toMVHR

Unit


Use apackingpiece to

holdopenthe

cookerhood

FRONT

UP

HR205

The cablemust be

routed clearof the firedamper

Connector

Clamp theProtective Box

around theConnector

Grommet

16

6.0 Installation

6.4 Fitting the MVHR unit

1. Offer the combined unit to the wall andengage the keyhole slots over the screwspreviously fitted.

2. Make sure the unit is level and tighten the topscrews before engaging the final screw.

6.5 Making the condensate connection

1. The condensate connector is suitable for 15mm pipe.

2. The condensate pipe should incorporate awater trap to prevent foul air being drawn into theunit. The minimum height of the trap should be75 mm.

Note: To ensure the condensate pipe isprimed, slowly pour water into thecondensate tray until it discharges intothe drain.

Fig. 17

17

6.0 Installation

6.6 Making the duct connections

1. The unit has four duct connections suitable for100mm plastic pipe.

1. Exhaust outlet to outside2. Air inlet from outside3. Stale air inlet from dwelling4. Fresh air outlet to dwelling

Notes: It is essential that the duct systemis connected as indicated.

It is important that the duct system doesnot interfere with the correct fitting of theouter door and does not prevent thecorrect operation of the unit.

6.7 Controls

1. The HR204 requires external controls toenable normal/boost switching, see Page 20 -Wiring Diagrams.

2. The HR205 can have optional externalcontrols fitted, see Pages 18 and 19 - WiringDiagrams.

6.8 Making the electrical connection

Warning: This appliance must be earthed

1. The normal running speed of the fans is set at120v.

2. The unit must be set to the appropriatevoltage as determined by air flow required andduct system pressure loss (see Section 5.3).

To change the voltage setting for the fans,unscrew and remove the white wire from the120v connection on the controller.

3. Carefully insert the wire into the desiredconnection (80, 100, 120, 140 or 160) andsecure the wire.

4. Fit the bottom cover panel.

5. Connect the flying lead to the mains supply -see Section 5.6.

6. Check the electrical installation for; Earthcontinuity, short circuits, resistance to earth andcorrect polarity.

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Fit bottom cover panel.

Position the white leadfor the required fan speedsetting, (160v fast to 80v slowavailable) 120v shown.

LN

16014012010080

Warning

WiringService

HR205

FRONT

UP

Fig. 18

18

7.0 Wiring Diagrams

1234

Overheat Thermostat

To Cooker HoodEarth forInspectionPanel

To MVHR

ForExternalControls

Fan(air out)

Controller

LN

16014012010080

OBC

b

bk

bk

b

grgr

gr

gr

w

w

br

br

wbr

br - Browng/y - Green/Yellowp - Purplebk - Black

Key Colorsb - Bluegr - Greyr - Redw - White

LN

L

LN

N Fuse (3.15AT)

Fan(air in)

r

r

r

r

b

b

g/y

g/y

g/y

bgr

gr

br

br

c

boostspeed230v bulb

40 wattsbulb

40 watts

p

p

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31A

br

brb

Light SwitchMicro Switch

MainsIn

230vg/y

brb

g/y

brb

b

b

bbr

brbb

b

Fig. 19

HR205 MVHR Unit Wiring

HR205 Cooker Hood Wiring

19

7.0 Wiring Diagrams

HS6 Humidistat

021

CommonBoostOrdinary

NL

NL

Manual Normal /BoostSwitch NBSW or

Pull Switch PCSW

Common

Boo

st

Nor

mal

c

1234

Remove Link

OverheatThermostat

OverheatThermostat


Fan(air out)

Controller

LN

16014012010080

OBC

b

bk

bk

b

gr

gr

gr

gr

w

w

br

br

wbr



LN

LN Fuse (3.15AT)

Fan(air in)

r

r

r

r

b

b

g/y

g/y

g/y

MainsIn

230vg/y

brb

g/y

brb

b

b

bbr

brbb

b

1234

Remove Link


Fan(air out)

Controller

LN

16014012010080

OBC

b

bk

bk

b

gr

gr

gr

gr

w

w

br

br

wbr



LN

LN Fuse (3.15AT)

Fan(air in)

r

r

r

r

b

b

g/y

g/y

g/y

WH

C00

11A

MainsIn

230vg/y

brb

g/y

brb

b

b

bbr

brbb

b

Fig. 20

HR205 MVHR Unit Wiring with optionalHumidstat HS6

HR205 MVHR Unit Wiring with optionalNormal/Boost Switch

20

7.0 Wiring Diagrams

Fig. 21

1234

Earth forInspectionPanel

ForExternalControls

ForExternalControls

Fan(air out)

Controller

LN

16014012010080

OBC

br

br



LN

L

LN

N Fuse (3.15AT)

Fan(air in)

r

r

r

r

b

b

g/y

g/y

g/y

WH

C00

33A

MainsIn

230vg/y

brb

g/y

brb

b

b

bbr

brbb

b

HR204 MVHR Unit Wiring

21

HS6 Humidistat

021

CommonBoostOrdinary

NL

NL

Manual Normal /BoostSwitch NBSW or

Pull Switch PCSW

CommonBoost

Normal

c

1234


Fan(air out)

Controller

LN

16014012010080

OBC

br

br



LN

LN Fuse (3.15AT)

Fan(air in)

r

r

r

r

b

b

g/y

g/y

g/y

MainsIn

230vg/y

brb

g/y

brb

b

b

bbr

brbb

b

1234


Fan(air out)

Controller

LN

16014012010080

OBC



LN

LN Fuse (3.15AT)

Fan(air in)

r

r

r

r

b

b

g/y

g/y

g/y

WH

C00

12A

MainsIn

230vg/y

brb

g/y

brb

b

b

bbr

brbb

b

br

br

HR204 MVHR Unit Wiring with optionalManual/Boost Switch

HR204 MVHR Unit Wiring with optionalHumidstat HS6

7.0 Wiring Diagrams

Fig. 22

22

8.0 Commissioning

8.1 Prepare for commissioning - HR205

1. Refit the front door panel by hooking it overthe top lip of the appliance and swinging down.Tighten the two case screws.

2. Ensure the telescopic hood is retracted.

3. Turn on the electrical supply. The unit will nowstart running at the normal ventilation speed.

4. Pull the telescopic hood forward. The unit willnow switch to boost speed.

5. Check the operation of the cooker hood lights.

8.1a Prepare for commissioning - HR204

1. Refit the front door panel by hooking it overthe top lip of the appliance and swinging down.Tighten the two case screws.

2. Check the external controls are set to normalrunning.

3. Turn on the electrical supply. The unit will nowstart running at the normal ventilation speed.

4. Set the external control to boost. The unit willnow switch to boost speed.

23

8.0 Commissioning

8.2 Balancing the system

Note: It is important that a suitableanemometer is used to balance thesystem therefore giving the requiredventilation rates to each room.

1. Set the appliance running on normal speed.

2. Make a preliminary adjustment of all the ductinlet and outlet louvres.

Note: The supply air terminal is directionaland incorporates a deflector plate. Ensurethat the deflector plate is correctlypositioned so that the active part of theterminal is discharging to the room.

3. Check the flow rate and adjust if necessarythe extract valve furthest from the appliance.

4. Check the flow rates and adjust if necessarythe remaining extract valves.

5. Repeat the flow checks and adjust until theextract system is balanced.

6. Check the flow rate and adjust if necessarythe inlet valve furthest from the appliance.

7. Check the flow rate and adjust if necessarythe remaining inlet valves.

8. Repeat the checks and adjust until the systemis correctly balanced.

Note: If the flow rates have been achievedwith all the louvres nearly closed, it maybe possible to reduce the fan speed andre-adjust the louvre settings.

8.3 Instruct the user

Instruct the user in the operation of theappliance. Hand over these instructions, givingadvice on the necessity for regular servicing ofthe filters and heat exchanger.

Note: It is important that any door orcupboard front covering the MVHR unit iseasily removable by the user as access forregular cleaning of the air filter and heatexchanger is required.

SV100Adjust Ceiling Supply Valve for Living Room etc

EV100Adjust Ceiling Extract Valve for Bathroom etc

Inside View ofExtract Valve

Locking Nutto lock

the valvein position

Inside View ofSupply Valve

Locking Nutto lock

the valvein positionAir direction

Air DeflectorPlate

AirDirectionIndictor

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29A

Fig. 23

24

9.0 Maintenance

Important: Before servicing ensure thatthe appliance is isolated from theelectrical supply. After isolating from theelectrical supply, allow one minute for thefans to stop rotating before servicing theappliance.

1. HR205 only -Extend the telescopic hood andremove the two metal filters. The cooker hoodfilters can be washed in a dishwasher;alternatively a hot hand wash will suffice. Checkand clean the filters if necessary. Dry the filtersthoroughly before re-fitting.


3. Identify the air inlet filter and remove bypulling forwards.

Taking note of the offset sliders, carefullyremove the heat exchanger by gently pullingforwards.


5. Loosen the two screws on each side plate andlift to remove.

6. HR205 only - Check the cooker hood inlet fordebris and fat deposits. Clean as required.Check the fire damper is in satisfactory conditionand unaffected by debris and fat deposits.Replace if necessary.

7. Check both fans, fan compartments andexhaust duct outlets for deposits. Clean asnecessary.

8. Remove the condensate tray by pullingforwards. Check and clean if necessary.

9. Check the condition of the four heatexchanger sealing strips and front door seal.Replace all seals as necessary (Fig. 24).

10. Carefully wash the heat exchanger inwarm soapy water taking care not to loosen theheat exchanger fins. Thoroughly dry the heatexchanger before re-fitting.

Note: Ensure the heat exchanger islocated correctly in the offset sliders.

11. Carefully vacuum the air inlet filter. Replace ifnecessary.

12. Re-assemble in reverse order and re-fit theouter door ensuring the door makes a good seal.

Pull forward & removethe outer case

Release handandfastners (Butterfly Bolts)

Removethe cooker

hoodfilters

for cleaning

View frombelow the

unit

WH

C00

16A

Warning

WiringService

Pull CookerHood forward

Pull out & clean theCondensate Tray

Removecoversto inspectLH/RHFans &FireDamper(clean asrequired)

FRONT

UP

Air inletfilter pullout, brush& vacuumclean

FRONT

UP

Use strap to pullout heatexchanger.

HR205

Fig. 24

25

13. Turn on the electrical supply to the appliance.With the hood closed the appliance will run onnormal setting. Extend the hood and theappliance will switch to boost setting. With theappliance on boost check the operation of thecooker lights

14. Check the condition of the ductwork system,the soundness of all joints and repair ifnecessary

9.0 Maintenance

26


IMPORTANT: ISOLATE FROM THEELECTRICAL SUPPLY BEFORE STARTINGANY WORK ON THE APPLIANCE.

The fans continue to rotate for one minute afterisolating from the electrical supply

10.1 Controller

1. HR205 Only - Fully extend the telescopiccooker hood and remove the two metal filters.

2. Remove the outer door by releasing the twoscrews and lifting the door up and forwards.

3. Remove the bottom electrical cover byreleasing the 3 screws, pulling the panelforwards and disconnecting the earth lead to thepanel. Make a note of the voltage setting for thefans and of the wiring arrangement for thecontroller.

4. Release all the wires connected to thecontroller.

5. Remove R.H. fan cover panel and remove theR.H. fan (see Section 10.3). Unscrew the twoscrews securing the controller mounting bracketto the bulkhead and remove the bracket andcontroller unit. Separate the bracket fromcontroller by removing the four screws.

6. Re-assemble with the new controller inreverse order. Check the electrical installationfor; Earth continuity, short circuits,resistance to earth and correct polarity.

10.2 Overheat thermostat - HR205 Only


2. Remove the bottom electrical cover byreleasing the 3 screws, pulling the panelforwards and disconnecting the earth lead to thepanel. Identify the connections for the overheatthermostat. Make a note of the routing for theoverheat thermostat cable.

3. Release the overheat thermostat connections.

4. Release the sensor head by springing openthe clip and pulling out the sensor head.

5. Remove the overheat thermostat taking carenot to dislodge the bulkhead grommet.

6. Carefully locate the new sensor and positionthe lead as shown in Fig. 26. Re-assemble withthe new overheat thermostat in reverse order.Check the electrical installation for; Earthcontinuity, short circuits, resistance to earthand correct polarity.

WH

C00

18A

Warning

FRONT

UP

Rear View of the Controller

ControllerMountingBracket

Mountingbracket tobulkheadsecuringscrews (2 off)

Controllersecuringscrews (4 off)

Controller

Bulkhead

LN

16014012010080

Take note of the fan speed setting,120v shown. When the new controlleris fitted, fit the white lead to theposition of the old controller for thecorrect fan speed.

Controller

Remove RH fan coverpanel & bottom cover panel.

OverheatThermostat

Head

OverheatThermostat

Sleeve

CableTie

OverheatThermostat

Clip

BulkheadGrommet

HR205

Fig. 25

27

10.3 Extract fan and Inlet fan

1. Lift off the front door panel by releasing thetwo hand screws and lifting up wards.

2. Loosen the two screws on the side plate andlift to remove.

3. Release the clip on the plastic plug anddisconnect the plug.

4. Slacken the two rear fan bracket screws.

5. Remove the two front fan bracket screws andremove the fan assembly.Note the position of the fan bracket relative tothe fan.

6. Remove the bracket and re-fit to the new fan.

7. Re-assemble with the new fan in reverseorder ensuring the cable does not foul the fanmotor. Check the electrical installation for;Earth continuity, short circuits, resistance toearth and correct polarity.

10.4 Fan capacitor


2. Loosen the two screws on the side plate andlift to remove.

3. Release the clip on the plastic plug anddisconnect the plug.

4. Slacken the two rear fan bracket screws.

5. Remove the two front fan bracket screws andremove the fan assembly.

6. Disconnect the two 2.5 mm spade terminalsfrom the capacitor.

7. Cut the two cable ties and remove thecapacitor.

8. Re-assemble in reverse order with the newcapacitor and use the new cable ties provided.Ensure the cable does not foul the fan motor.Check the electrical installation for; Earthcontinuity, short circuits, resistance to earthand correct polarity.


Removalof the

LefthandFan

(righthandfan similiar)

WiringService

FRONT

UP

Push FanAssenblyto the leftand pull

away fromunit

Slackenthe 2 rearsecuringscrews

Fan supportbracket

Fan supportbracket

Releasethe

electrical plug

Fan

Fancapacitor

Fancapacitor

Fan securingscrews 4 off

Cable ties

Cable ties

Spadeterminals

Removethe 2 frontsecuringscrews

WH

C00

20A

HR205

Warning RemoveLH coverto accessthe LHFan

Fig. 26

28

10.5 Fire damper - HR205 Only

1. Fully extend the telescopic cooker hood.

2. Remove the two metal filters.

3. Remove the outer door by releasing the twoscrews and lifting the door up and forwards.


5. Remove the four screws that secure the firedamper and lift it away from the unit.

10.6 Heat exchanger


2. Gently ease the heat exchanger forwards andremove.

3. Re-assemble in reverse order taking care notto damage the heat exchanger seals.

10.7 Heat exchanger seals


2. Gently ease the heat exchanger forwards andremove.

3. Remove the four heat exchanger seals takingcare to remove all the old adhesive backing.

4. Fit the new seals ensuring they make goodcontact with the location channel.

5. Re-assemble in reverse order taking care notto damage the heat exchanger seals.

10.8 Cooker hood seals

1. Fully extend the cooker hood.

2. Remove the metal filters.

3. Pull away the old cooker hood seal andremove any remaining glue. Use a small amountof solvent if necessary.

4. Peel back the adhesive strip and carefully fitthe new seal as shown in Fig. 28.

5. Re-assemble in reverse order.


Warning

WiringService

WH

C00

19A

1 3

2

Fire Damper

4 FixingScrews

FRONT

UP

Re-fit newheat

exchanger

With theCooker Hoodfilters removed,pull off theold seal andclean the glueaway.

Peel back adhesive strip &fit new Cooker Hood Seal

Adhesive Strip


HR205

HR205

4

Fit 4 newself-adhesivesealing strips(see positions1 to 4 below)

Fig. 27

29

This page is intentionally blank

30

11.0 Fault Finding

START

Before starting FAULT FINDING carry out preliminary electrical systems checks

i.e. Earth Continuity, Polarity, Short Circuitand Resistance to Earth.

Ensure all external controls are operatingand are set to normal running. Ensure thata mains electrical supply is available to theunit.

Refer to diagrams below toidentify terminals on components(e.g. A1, D3 etc).

YES

NO

Note 1Electricity supply must beisolated and Fan Motortemperature must be less than100˚ to allow thermal trip toreset.

Note 2Electricity supply must beisolated and Overheattemperature must be lessthan 80˚ to allow OverheatThermostat to reset.

WARNINGIf the Overheat sensor or Fanthermal trip has operated,check the entire system andunit for correct installation.Check all ducting outside &terminals for blockages.

IMPORTANTWhen investigatingoverheating allow the unit torun long enough for any faultto become apparent.

123456

ControllerConnector

BlockC.Hood

PlugFanPlug

DE

3

2

1

G

F

BA

C12

12

123

OBC

LN

Fuse(3.15AT)

WH

C00

35A

Ensure the CookerHood is closed.

Ensure continuitybetween terminals

D5 & A1and between

D6 & A2.Check mains

supply.

Is theremains voltage

across terminalsA1/A2?

YES

NO

Investigate causeand

rectify fault

Replace fuse3.15AT

Is thefuse on thecontroller

O.K.

YES

NO

Disconnect wiresfrom terminalsF1, F2 & F3.

Ensure voltageselector wire is

correctly engaged.

Replace controller

Replacecooker hood

Is thevoltage acrossterminals B1 &

B2 between 80v& 160v?

NO

Is the voltageacross F1 & B2

between 80v& 160v?

YES

NO

See Fan FaultFinding Chart

Check externalcontrol wiring.

Refer to 205 wiringdiagram (section 7)

Reconnect wiresto terminalsF1, F2 & F3.

Rectify fault oncooker hood

plug and lead.

Disconnect 4 pincooker hood plug.

Are both fansoperating?

YES

NO

Is thevoltage across

the blue & whitewires on the cooker hood

plug between80v and

160v.

YES

LN

16014012010080

Voltage Selector Wire

HR205 - Main Unit Fault Finding Chart

31

11.0 Fault Finding

WH

C00

36A

YES

Disconnect 4 pincooker hood plug.

Is themains voltage

across the blue &brown wires on the

cooker hoodplug.

YES

NONO

Clean filter &heat exchanger

(section 9). Checkduct system and

terminals forblockages or

damage. Ensureterminals are

adjusted correctly.

Is thereadequate airflowat the appliance

inlets andoutlets

YES

YES

NO

Ensure continuityacross cooker hood

plug and lead.

Replace cookerhood

Replace bulbs(Max. 40 watts)

Replace bulbs(Max. 40 watts)Unit operatingsatisfactorily

Does theappliance switch

to boost when the cookerhood is opened? (Mains

voltage is presentacross terminals

B1 & B2

YES

NO

Do cooker hoodlights operate?

YES

NO

Are the lightbulbs faulty?


32

11.0 Fault Finding


START

YES

NO

123456

ControllerConnector

BlockFanPlug

D

3

2

1

G

F

BA

C12

12

123

OBC

LN

Fuse(3.15AT)

WH

C00

37A

Ensure continuitybetween terminals

D5 & A1and between

D6 & A2Check mains

supply.

Is theremains voltage

across terminalsA1/A2?

YES

NO

Investigate causeand

rectify fault

Is thefuse on thecontroller

O.K.

YES

NO

Disconnect wiresfrom terminalsF1, F2 & F3.

Ensure voltageselector wire is

correctly engaged.

Replace controller

Is thevoltage acrossterminals B1 &

B2 between 80v& 160v?

NO

Is the voltageacross F1 & B2

between 80v& 160v?

Replace controller

NO

Is there mainsvoltage between

F2 and B2

YES

NO

See Fan FaultFinding Chart

Check externalcontrol wiring.

Refer to 204 wiringdiagram (section 7)

Reconnect wiresto terminalsF1, F2 & F3.

Rectify faulton wiring to

external control

Checkexternalcontrol,rectify orreplace

asnecessary.

NO

Do theexternal controls

have a mains supplyfrom F2 & reduced

voltage supplyfrom F1

Are both fansoperating?

YES

YES YES

LN

160

Voltage Selector Wire

14012010080

Replace fuse3.15AT

Before starting FAULT FINDING carry out preliminary electrical systems checks

i.e. Earth Continuity, Polarity, Short Circuitand Resistance to Earth.

Ensure all external controls are operatingand are set to normal running. Ensure thata mains electrical supply is available to theunit.

Refer to diagrams below toidentify terminals on components(e.g. A1, D3 etc).

Note 1Electricity supply must beisolated and Fan Motortemperature must be less than100˚ to allow thermal trip toreset.

WARNINGIf the Fan thermal triphas operated, check theentire system and unitfor correct installation.Check all ducting outside &terminals for blockages.

IMPORTANTWhen investigatingoverheating allow the unit torun long enough for any faultto become apparent.

33

11.0 Fault Finding

WH

C00

38A

YES YES

NONO

Clean filter &heat exchanger

(section 9). Checkduct system and

terminals forblockages or

damage. Ensureterminals are

adjusted correctly.

Is thereadequate airflowat the appliance

inlets andoutlets

Replace bulbs(Max. 40 watts)Unit operatingsatisfactorily

Do externalcontrols switch

the unit to boost.

YES


34

Fan Circuit Fault Finding Chart

11.0 Fault Finding

Is th

ere

cont

inui

ty a

cros

s th

eov

erhe

ad th

erm

osta

t?(E

nsur

e th

e ov

erhe

atth

erm

osta

t is

belo

w 8

0˚c)

Rep

lace

fan

(sec

tion

10.3

)

Rep

lace

fan

(sec

tion

10.3

)

YE

SY

ES

YE

SR

e-al

ign

fan

Rep

lace

Ove

rhea

tT

herm

osta

t(s

ectio

n 10

)

Is th

evo

ltage

acr

oss

G2

and

G3

onth

e fa

n pl

ug b

etw

een

80v

and

160v

?

Rec

tify

faul

t.E

nsur

e co

ntin

uity

acro

ss m

ale

and

fem

ale

fan

plug

.

NO

NO

NO

NO

Are

fans

free

toro

tate

?

Is th

efa

n fo

ulin

gon

inle

trin

g?

Sta

rt

WHC0039A

YE

S

Fo

r HR

205

Mo

del

On

ly

YE

SYE

S

Dis

conn

ect

the

capa

cito

r.Is

ther

e be

twee

n35

0 &

405

Ohm

s be

twee

nth

e br

own

& b

lack

wire

s fr

om th

efa

n?

YE

SY

ES

With

the

capa

cito

rdi

scon

nect

ed is

ther

e16

0 -

200

Ohm

s re

sist

ance

betw

een

the

blac

k &

blu

ew

ires

at th

e fa

nco

nnec

tor

G2/

G3?

Is th

eca

paci

tor

read

ing

appr

oxim

atel

y2

µF?

NO

NO

Has

the

fan

ther

mos

tat t

ripop

erat

ed.

(see

not

e1)

.

Fan

has

over

heat

ed.

Inve

stig

ate

the

caus

e an

d re

ctify

.

Rep

lace

fan

(sec

tion

10.3

)

NO

Rep

lace

capa

cito

r(s

ectio

n 10

.4)

NO

No

te 1

Ele

ctric

ity s

uppl

y m

ust b

eis

olat

ed a

nd F

an M

otor

tem

pera

ture

mus

t be

less

than

100˚

to a

llow

ther

mal

trip

tore

set.

No

te 2

Ele

ctric

ity s

uppl

y m

ust b

eis

olat

ed a

nd O

verh

eat

tem

pera

ture

mus

t be

less

than

80˚

to a

llow

Ove

rhea

tT

herm

osta

t to

rese

t.

WA

RN

ING

If th

e O

verh

eat s

enso

r or

Fan

ther

mal

trip

has

ope

rate

d,ch

eck

the

entir

e sy

stem

and

unit

for

corr

ect i

nsta

llatio

n.C

heck

all

duct

ing

outs

ide

&te

rmin

als

for

bloc

kage

s.

IMP

OR

TAN

TW

hen

inve

stig

atin

gov

erhe

atin

g al

low

the

unit

toru

n lo

ng e

noug

h fo

r an

y fa

ult

to b

ecom

e ap

pare

nt.

1 2 3 4 5 6

Co

ntr

olle

rC

on

nec

tor

Blo

ckC

.Ho

od

Plu

gFa

nP

lug

DE

3 2 1

G

F BAC

1 21 21 2 3

O B C L N

Fu

se(3

.15A

T)

L N160

140

120

100

80

Vol

tage

Sel

ecto

r Wire

35

12.0 Short Parts List

Key No. Spares Part No. Description

1 372730 Fan assembly c.w. capacitor2 372731 Capacitor3 372732 Controller4 372733 Overheat thermostat5 372734 Fire damper6 372735 Inlet duct filter7 372736 Heat exchanger8 372737 Heat exchanger seals (4 off)9 372739 Outer door assembly10 372741 Cooker hood seal11 372743 Cooker hood filters (set of two)12 372748 M5 wing screw13 372777 Light Cover

Optional extras

14 370254 Humidity sensor HS615 370495 Normal/boost switch NBSW16 370278 Normal/boost switch PCSW

1

23 4

5

6

9

78

11

15

16

12

13

Normal

Boost

14W

HC

0023

A

10

FRONT

UP

Fig. 28

372705C - 0208

user, installation & servicing instructions wh204/wh205with cibse guides and bre digest 398....

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