option guide

August 2021 CG-PRC037B-GB

Conquest

CGAX, air-cooled scroll chillers

CXAX, air-to-water scroll heat pumps

Refrigerant R454B or R410A

Models CGAX/CXAX from 015 to 060

Option Guide

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Table of contents: 1 CONQUEST™ Range Overview .......................................... 4

1.1 CGAX Range ........................................................................................................... 4 1.2 CXAX Range ............................................................................................................ 5 1.3 Coil’s distribution ...................................................................................................... 6 1.4 Unit Appearance ...................................................................................................... 7

2 Efficiency level, Digit 12 ...................................................... 9

2.1 Standard efficiency, Digit 12 = 1 ............................................................................... 9 2.2 High efficiency, Digit 12 = 2 ...................................................................................... 9 2.3 AC & EC fans Characteristics. .................................................................................. 9

3 Operating map – airside, Digit 15 ..................................... 13

3.1 Standard Ambient temperature, Digit 15 = A .......................................................... 15 3.2 Low ambient temperature, Digit 15 = C .................................................................. 15

4 Freeze protection, Digit 18 ................................................ 15

4.1 None, Digit 18 = X .................................................................................................. 15 4.2 With electric heaters, Digit 18 = 2 ........................................................................... 15 4.3 With pump activation, Digit 18 = 3 .......................................................................... 17

5 Refrigerant type, Digit 20 .................................................. 17

5.1 Full charge R410A, Digit 20 = A ............................................................................. 18 5.2 Nitrogen charge, R410A ready, with oil, Digit 20 = 2 .............................................. 18 5.3 Pre-charge R410A, Digit 20 = 8 .............................................................................. 18 5.4 Full charge R454B, Digit 20 = B ............................................................................. 18 5.5 Nitrogen charge, R454B ready, with oil, Digit 20 = 3 .............................................. 18

6 Operating map water side, Digit 21 .................................. 19

6.1 Comfort cooling, Digit 21 = A .................................................................................. 19 6.2 Process cooling, Digit 21 = B.................................................................................. 19

7 Water connection, Digit 22 ............................................... 19

7.1 Grooved pipe connection (standard) digit 22 = 1 .................................................... 19 7.2 Grooved pipe connection with coupling and pipe stub digit 22 = 3 .......................... 20

8 Condenser coating, Digit 23 ............................................. 20

8.1 Standard aluminum fins, Digit 23 = B ..................................................................... 20 8.2 Epoxy aluminum fins Digit 23 = E. .......................................................................... 21 8.3 Aluminum Micro Channel, Digit 23 = H. .................................................................. 22 8.4 E-coated Micro Channel, Digit 23 = J ..................................................................... 23

9 Heat Recovery, Digit 24 ..................................................... 24

9.1 None Heat Recovery, Digit 24 = X .......................................................................... 24 9.2 Partial Heat Recovery (PHR), Digit 24 = 2 .............................................................. 24

10 Starter type, Digit 26 .......................................................... 27

10.1 Across the Line Starter/Direct on Line Digit 26= A .................................................. 27 10.2 Solid-state Soft Starter Digit 26 = B ........................................................................ 27

11 Refrigerant detector, Digit 29 ........................................... 29

11.1 Without, Digit 29 = X .............................................................................................. 29 11.2 With refrigerant detector, Digit 29 = 2 ..................................................................... 29

12 Human interface, Digit 30 ................................................. 30

12.1 Without interface, Digit 30= X ................................................................................. 30 12.2 Interface PGD1, Digit 30= A ................................................................................... 30

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13 Smart Com protocol, Digit 31 ........................................... 31

13.1 No remote digital communication, Digit 31 = X ....................................................... 32 13.2 Modbus interface, Digit 31 = 1 ................................................................................ 32 13.3 LonTalk® interface, Digit 31 = 2 ............................................................................. 32 13.4 BACNet™ Interface; Digit 31= 4 ............................................................................. 33

14 External customer input/output option, Digit 32 ............ 33

14.1 Without, Digit 32 = X .............................................................................................. 33 14.2 With, Digit 32 = A ................................................................................................... 33

15 Smart Sequencer, Digit 33 ................................................ 36

15.1 Without, Digit 33 = X .............................................................................................. 36

16 Hydraulic module, Digit 35 ............................................... 36

16.1 No pumps and no contactors, Digit 35 = X ............................................................. 37 16.2 Contactors single pump, Digit 35 = 2 ...................................................................... 37 16.3 Contactors dual pump, Digit 35 = 4 ........................................................................ 37 16.4 Single pump standard pressure, Digit 35 = 5 .......................................................... 37 16.5 Single pump high pressure, Digit 35 = 6 ................................................................. 39 16.6 Dual pump standard pressure, Digit 35 = 7 ............................................................ 40

17 Smart Flow Control, Digit 36 ............................................ 41

17.1 No pump flow control; Digit 36 = X ......................................................................... 41 17.2 Manual flow control, Digit 36 = B ............................................................................ 41 17.3 Variable primary flow (Constant ΔT), Digit 36 = C .................................................. 42

18 Buffer tank, Digit 37 ........................................................... 44

18.1 Without Buffer tank; Digit 37 = X ............................................................................ 44 18.2 Buffer Tank, Digit 37 = 1 ......................................................................................... 44

19 Installation accessory, Digit 39 ........................................ 45

19.1 None, Digit 39 = 1 .................................................................................................. 45 19.2 Neoprene Pads, Digit 39 = 4 .................................................................................. 45

20 Acoustic level, Digit 41 ..................................................... 48

20.1 Standard Noise (SN), digit 15 = X .......................................................................... 48 20.2 Low Noise (LN), digit 15 = L ................................................................................... 48 20.3 HESP, Digit 41 = 2 ................................................................................................. 50

21 Condenser protection, Digit 42 ........................................ 51

21.1 No option, Digit 42 = X ........................................................................................... 51 21.2 Condenser guard grill, Digit 42 = A ......................................................................... 51

22 Literature Language, Digit 44 ........................................... 52

23 Under/over voltage protection, Digit 45 .......................... 52

23.1 None, Digit 45 = X .................................................................................................. 52 23.2 Included, Digit 45 = 1 ............................................................................................. 52

24 Suplemental Heat Control, Digit 49 .................................. 53

24.1 Without, Digit 49 = X .............................................................................................. 53 24.2 With, Digit 49 = 1 .................................................................................................... 53

25 Design Special, Digit 50 .................................................... 54

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1 CONQUEST™ Range Overview

Before explaining the different options and accessories available, let’s first take a look at the

current range and review the definition of CONQUEST™ Air-cooled heat pumps and chillers.

The CONQUEST Air-cooled heat pumps and chillers family covers a capacity range between

40 kW and 165 kW, which includes Cooling only and Heat pump units. For the “Cooling only”

unit, it is called CGAX and the Heat pump is named CXAX. The units come divided by its

efficiency and their acoustic level which won’t comprise the efficiencies.

The best value chiller and heat pump on the market.

Optimized efficiencies

Lowest sound levels

High quality finish

Smart and versatile

1.1 CGAX Range

Indicative cooling capacity for a SE SN unit, without HYM

CGAX COMPRESSOR FAN UNIT DIMENSIONS (SN)

Size Net Cooling

Capacity

(kW)

Compressor

Number per

Circuits

Model Circuit1 /

Circuit 2 #

Unit

Length

(mm)

Unit

Width

(mm)

Unit

Height

(mm)

015 45 2 7,5+7,5 1 2346 1285 1524

017 51 2 7,5+10 1 2346 1285 1524

020 60 2 10+10 2 2346 1285 1524

023 67 2 10+13 2 2346 1285 1524

026 76 2 13+13 2 2346 1285 1524

030 84 2 15+15 2 2346 1285 1724

036 101 3 12+12+12 2 2327 2250 1524

039 114 3 13+13+13 3 2327 2250 1524

045 129 3 15+15+15 3 2327 2250 1524

035 100 2 7,5+10 / 7,5+10 2 2327 2250 1524

040 118 2 10+10 / 10+10 4 2327 2250 1524

046 133 2 10+13 /10+13 4 2327 2250 1524

052 149 2 13+13 / 13+13 4 2327 2250 1524

060 165 2 15+15 / 15+15 4 2327 2250 1724

Table 1 CGAX Range

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1.2 CXAX Range

CXAX COMPRESSOR FAN UNIT DIMENSIONS (SN) Si

ze Net

Cooling Capacity

(kW)

Net Heating Capacity

(kW)

Compressor Number per

Circuits

Model Circuit1 / Circuit 2

# Unit

Length (mm)

Unit Width (mm)

Unit Height (mm)

15 44 44 2 7,5+7,5 1 2346 1285 1524

17 50 50 2 7,5+10 1 2346 1285 1524

20 60 58 2 10+10 2 2346 1285 1524

23 66 64 2 10+13 2 2346 1285 1524

26 73 71 2 13+13 2 2346 1285 1524

30 80 80 2 15+15 2 2346 1285 1724

36 96 96 3 12+12+12 2 2327 2250 1524

39 110 110 3 13+13+13 3 2327 2250 1524

45 119 121 3 15+15+15 3 2327 2250 1524

35 98 100 2 7,5+10 / 7,5+10 2 2327 2250 1524

40 115 116 2 10+10 / 10+10 4 2327 2250 1524

46 128 130 2 10+13 /10+13 4 2327 2250 1524

52 144 142 2 13+13 / 13+13 4 2327 2250 1524

60 155 161 2 15+15 / 15+15 4 2327 2250 1724

Table 2 CXAX Range

Figure 1 CGAX & CXAX comparison

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1.3 Coil’s distribution

CGAX CXAX

Size Frame # Cricuits Right Side

Left Side

Right Side

Left Side 015 Simplex 1

017 Simplex 1

020 Simplex 1

023 Simplex 1

026 Simplex 1

030 Simplex 1

036 Simplex Large 1 039 Simplex Large 1

045 Simplex Large 1

035 Duplex 2 040 Duplex 2

046 Duplex 2

052 Duplex 2

060 Duplex 2

Table 3 Frame & Coil's type

Note: Coil dimensions available on Submital Drawing

Figure 2 Frames' configuration

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1.4 Unit Appearance

1.4.1 External appearance

The color of the unit is RAL 9002, but the axial fans will rest RAL 7016.

When a buffer tank is delivered, the buffer tank is RAL 7016.

Image 1 CONQUEST - Duplex frame – STD NOISE

Image 2 CONQUEST - Duplex frame – LN or

HESP

Image 3 Unit Nameplate sample

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1.4.2 Inside apparence

Image 4 Unit w/o hydraulic module

Image 5 Unit with hydraulic module

Image 6 Electrical panel

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2 Efficiency level, Digit 12

2.1 Standard efficiency, Digit 12 = 1

2.1.1 Description

EER at 12/7 OAT=35°C: SE is class B or C (Eurovent efficiency) when operating at full load.

Standard efficiency units use AC fan motors with three-phase on the condenser. The motor

and the ball bearings are permanently lubricated and overload protection is provided.

However, if the unit has Low Ambient (Digit 15= C) then it will have one EC fan per circuit.

2.2 High efficiency, Digit 12 = 2

2.2.1 Description

HE version remains with the same compressors, exchangers and airflow of SE version.

The EER in High efficiency unit is the same value of a standard unit, but the SEER is much

higher because it counts with an adaptive control that improves the efficiency in partial load

operation. Best compromise between number of compressors in operation and airflow (fans’

rotation)

High efficiency units are always equipped EC fan brushless motor, operating with direct

current. EC Fan: the basis is similar to the principle of a frequency inverter; the motor speed

depends on the voltage provided by the integrated module. All fans are driven at the same

speed.

2.2.2 Benefits

High efficiency and a significant reduction of energy consumption at partial load.

2.3 AC & EC fans Characteristics.

The motors of both fans are Insulation class F and Ingress protection marking IP54.

Image 7 AC fans model

Image 8 EC fans model

AC Motor Number of poles: 8

Nominal Speed: 680 RPM

Same grid design as AC fan With EC motor

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2.3.1 Fan’s type

Figure 3 Fans' distribution

FAN CKT 1 FAN CKT 2

1A 1B 1C 2A 2B

Simplex

SE - Std Ambient

High/Low Speed (AC fan)

High Speed (AC fan) if any

SE - Low Ambient

Variable Speed (EC fan)


HE/HESP Variable Speed

(EC fan) Variable Speed (EC fan) if any

Simplex Large

SE - Std Ambient


High Speed (AC fan)

High Speed (AC fan)

SE - Low Ambient


High Speed (AC fan)

High Speed (AC fan)


(EC fan) Variable Speed

(EC fan)

Variable Speed

(EC fan)

Duplex

SE - Std Ambient





SE - Low Ambient






(EC fan) Variable Speed (EC fan) if any


Variable Speed (EC fan) if any

Table 4 Fans operation

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2.3.2 Performance curves

Figure 4 EC fans Pressure vs Airflow

Figure 5 AC fans Pressure vs Airflow

10

119

197208

228

243252256257

53

0

33

53

90

136

173

199

217

22

2131

40

89

129

158

183

45

3

45

60

86

109

127138

147

37

3

37

52

78

101

120131

140

0

20

40

60

80

100

120

140

160

180

200

220

240

260

2804

00

0

5 0

00

6 0

00

7 0

00

8 0

00

9 0

00

10

00

0

11

00

0

12

00

0

13

00

0

14

00

0

15

00

0

16

00

0

17

00

0

18

00

0

19

00

0

20

00

0

21

00

0

22

00

0

23

00

0

24

00

0

25

00

0

26

00

0

27

00

0

To

tal p

ressu

re (

Pa)

qv (m3/h)

EC fan

Airflow1020RPM

Airflow 910RPM

Airflow 810RPM

Airflow 710RPM

Airflow 690RPM

0

13

27

39

51

62

71

79

89

99

0

8

16

25

3035

3943

4953

0

10

20

30

40

50

60

70

80

90

100

40

00

50

00

60

00

70

00

80

00

90

00

10

000

11

000

12

000

13

000

14

000

15

000

16

000

17

000

18

000

19

000

To

tal p

ressu

re (

Pa)

qv (m3/h)

AC fan

High speed680 RPM

Low speed500 RPM

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2.3.3 Power input/Airflow curves

Figure 6 EC fans Power input vs Airflow

Figure 7 AC fans Power input vs Airflow

1764

2219

243424252376

22872193

2077

1401

1192

13231401

1534

167517451746

1638

861861963

1 1511 255

1 3061 294

725

605

725838

895937958971

654562

654766

824869893911

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

4 0

00

5 0

00

6 0

00

7 0

00

8 0

00

9 0

00

10

00

0

11

00

0

12

00

0

13

00

0

14

00

0

15

00

0

16

00

0

17

00

0

18

00

0

19

00

0

20

00

0

21

00

0

22

00

0

23

00

0

24

00

0

25

00

0

26

00

0

27

00

0

Po

wer

inp

ut

(W)

qv (m3/h)

EC fan

Input 1020RPM

Input 910RPM

Input 810RPM

Input 710RPM

Input 690RPM

722752

778804

839870

911938945

971

480490504514523532543552553564

0

100

200

300

400

500

600

700

800

900

1000

40

00

50

00

60

00

70

00

80

00

90

00

10

000

11

000

12

000

13

000

14

000

15

000

16

000

17

000

18

000

19

000

Po

wer

Inp

ut[

W]

qv [m3/s]

AC fan

High speed

Low speed

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3 Operating map – airside, Digit 15 Operating Maps are similar for units with R410A and units with R454B.

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Figure 8 Operating map (air side) CGAX & CXAX Cooling mode

Figure 9 Operating map CXAX Heating mode

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3.1 Standard ambient air temperature, Digit 15 = A

The operating range as Standard ambient option is the same for both chiller (CGAX) and heat

pump (CXAX) in cooling mode: 5°C ≤ Air temperature ≤ 46°C

For the heating mode of the heat pump (CXAX); the operation range is:

-15°C≤ Air temperature ≤ 33°C.

In mobile TOPSS, the selections in heating mode are limited to 20°C ambient. Still, the unit

can operate in heating until 33°C. This is useful for swimming pools applications, for example.

3.2 Low ambient air temperature, Digit 15 = C

With Low ambient option, EC fans are mounted on the unit. EC fans allow operation in

cooling mode with air temperature down to -18°C on CGAX and -10 ° C on CXAX.

The EC fans are used to reduce the airflow when necessary.

4 Freeze protection, Digit 18

4.1 None, Digit 18 = X

Glycol in the water loop in charge of the freeze protection.

4.2 With electric heaters, Digit 18 = 2

4.2.1 Application

- When the unit is exposed to ambient temperature between 0°C and -18°C.

- When the unit needs to be protected from freezing (no glycol in the water loop).

4.2.2 Description

These freeze protection consist in electrical heaters that could be placed in different parts

depending the modules that have been chosen for the unit:

Unit without hydraulic module:

On the evaporator a blanket heater is installed at the bottom of the brazed plate heat

exchanger (BPHE).

Image 9 BPHE's heater

Unit with hydraulic module:

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- Same as above plus hydraulic module protection

- Antifreeze heater on the expansion tank plus flexible pipe and antifreeze heater with

water pipe between the pump and the brazed plate heater exchanger (BPHE).

- Image 10 Hydraulic module's heaters

Unit with hydraulic module plus buffer tank:

Same as above but there are also immersion heaters on the buffer tank.

Image 11 Buffer tank's heaters

CGAX CXAX

Sizes Pump package anti-freeze heater power (W)

Buffer tank anti-freeze heater power (W)

Sizes Pump package anti-freeze heater power (W)

Buffer tank anti-freeze heater power (W)

15

280 780

15

280 780

17 17

20 20

23 23

26 26

30 30

36 340 1180

36 340 1180 39 39

45 45

35 280 1120

35 280 1120

40 40 340 1180

46 46 280 1120

52 340 1180

52 340 1180

60 60

Table 5 CGAX & CXAX Heaters' power (W) on buffer tanks

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Note: The water piping between the chiller and the building has to be protected

against freezing by installing heating cable

4.2.3 Operation

Freeze protection via the CH535 control turns on the heaters based on ambient

temperature (below 3°C).

4.2.4 Benefits

- All the components are protected.

- No additional or dedicated electrical connection when installing.

4.2.5 Incompatibilities

No incompatibility.

4.3 With pump activation, Digit 18 = 3

4.3.1 Application

No heaters are provided but the anti-freeze protection is possible with the pump activation

using external temperature sensor. This system allows reducing the price and consumption

of the unit.

4.3.2 Description

As no heaters are provided, the system will make water flows so it heats by friction. The

system counts with a 3 way valve that will let the water flows throw the system or make it flow

in a loop without entering to customer water circuit.

Figure 10 Pump activation Option’s system diagram

4.3.3 Operation

While the unit is OFF, the pumps are controlled by the CH535 control depending on the

temperature read by the external temperature sensor. The pumps will start when the ambient

temperature is less than 2°C AND the leaving water temperature is less than 15°C; if

conditions both conditions are valid, the operation of the pump will be 5 min ON / 10 min

OFF.

5 Refrigerant type, Digit 20 All units are available with refrigerants R410A and R454B. R454B has an advantage in term

of GWP.

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• R410A is a refrigerant blend HFC/HFC

▪ Composition: 50% R125 + 50% R32

• R454B is a refrigerant blend HFO/HFC

▪ Composition: 31.1% R1234yf + 68.9% R32

The PED directive classifies R410A and R454B differently. From manufacturing perspective,

the CGAX R454B requires additional brazing certifications and a material traceability on

several components and a ventilation of the electrical cabinet.

5.1 Full charge R410A, Digit 20 = A

Unit delivered with full refrigerant R410A and with oil charge.

5.2 Nitrogen charge, R410A ready, with oil, Digit 20 = 2

Unit is R410A ready, delivered with Nitrogen charge and with oil.

5.3 Pre-charge R410A, Digit 20 = 8

Unit is R410A ready, delivered with a pre-charge of refrigerant and with oil.

5.4 Full charge R454B, Digit 20 = B

Unit R454B ready, delivered with full refrigerant (R454B) and with oil charge.

On R454B units, a fan ventilates the electrical cabinet.

5.5 Nitrogen charge, R454B ready, with oil, Digit 20 = 3

Unit R454B ready delivered with Nitrogen charge and with oil.

Ventilation of the

electrical cabinet of a

R454B unit

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Leaving water temperature

6 Operating map water side, Digit 21

MEG: Mono-Ethylen-Glycol

Figure 11 Conquest's operating map water side

The illustration above shows the application that can be adapted for evaporator. In standard,

the evaporator is provided with comfort cooling application which the evaporator leaving

temperature is in a range of 5°C to 20°C.

Process cooling application with the range of leaving water temperature between -12°C

and 5°C is an option.

6.1 Comfort cooling, Digit 21 = A

- The range for the two units is the same [5/20] °C

- Glycol is mandatory for leaving chilled water temperature below 6°C

6.2 Process cooling, Digit 21 = B

- The range of this option depends on the chosen unit; for the CGAX, it is [-12/5] °C

and for the CXAX it is [-10/5] °C.

- It’s mandatory to use Glycol. Minimum LWT with MPG is -8°C.

7 Water connection, Digit 22 There are 2 ways which are suggested by Trane for water pipe connections (chilled water

and HR hot water (if any) connections).

7.1 Grooved pipe connection (standard) digit 22 = 1

Process cooling application

-12 °C -10°C - 8°C

CGAX CXAX

0 °C +6°C +5°C +20°C

With glycol

Comfort cooling application

MEG only

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Image 12 Grooved water connection

7.1.1 Description

- This type of pipe has a grooved end.

- This groove provides a gripping area for the coupling to engage around the full pipe

circumference.

- Easy piping connection.

7.2 Grooved pipe connection with coupling and pipe stub digit 22 = 3

Image 13 Coupling and pipe stub

7.2.1 Description

Used when costumer is not able to grove its own pipe.

Pipe stub and coupling are now shipped in electrical panel.

8 Condenser coating, Digit 23

8.1 Standard aluminum fins, Digit 23 = B

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Image 14 Aluminum fins

8.1.1 Application

- When the chiller is installed in standard condition

- Non polluted ambiance

- Non corrosive ambiance

8.1.2 Description

Aluminum fin is a standard fin used on all CXAX heat pumps.


CGAX.

8.2 Epoxy aluminum fins Digit 23 = E.

Image 15 Gold epoxy aluminum fins

8.2.1 Application

- When the heat pump is requested for coastal or salt mist environments.

- When the aluminum fin is exposed to hard weather conditions (acid rain, moisture,

pollution, salt …).

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8.2.2 Description

- The fins are made out of aluminum coated sheets.

- Condenser epoxy coated; epoxy slows down the corrosion process on the aluminum

fins when the unit is installed on sea side or in a polluted area.

- Epoxy layer is between 2 to 3 µm thick per surface

8.2.3 Benefits

This option allows installation near the sea and avoids aluminum corrosion. The epoxy also

provides a barrier protection at the fin collar to stop galvanic corrosion action between the

aluminum fins and the copper tubes.


CGAX

8.2.5 More detail

For information, there are 192 fins per foot installed in the condenser.

See engineering bulletin PROD_PRB004_E4 on Litweb.

8.3 Aluminum Micro Channel, Digit 23 = H.

Image 16 Micro Channel Heat Exchanger

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8.3.1 Application

Aluminum Micro Channel Heat Exchanger is standard for all CGAX chillers.

8.3.2 Description

- The fully-brazed construction micro channel coil increases the coil rigidity making

them more rugged to resist the rigors of job site handling and damage due to

shipping. The micro channel coil's headers, tubes and fins are assembled and then

sprayed with a powder flux bonding agent. The coil is then sent through a large

controlled air automated brazing furnace that completely joins these separate pieces

as one solid micro channel coil.

- The bottom and top tubes of each coil section are always inactive refrigerant paths,

this is done to prevent refrigerant leaks due to corrosion that may be present from

moisture resting between the top or bottom tube and the gasket material and also

serve as a buffer during the installation and removal of the coil section.

Image 17 MCHE's parts

8.3.3 Benefits

This process substantially decreases the chances of leaks due to improper brazing

techniques. Each fin surface is angled and louvered to create air turbulence through the coil

which provides more efficient and enhanced heat transfer without additional air pressure

drop through the coil.


CXAX

8.4 E-coated Micro Channel, Digit 23 = J

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Image 18 E-Coated MCHE

8.4.1 Application

Refer to the following document to know when is necessary to apply the coating PROD_PRB

005 A, on LitWeb.

8.4.2 Description

The condenser is provided already coated before unit assembly.

8.4.3 Benefits

This option allows installation in high chemical concentrated or coastal environment and

avoids aluminum corrosion.


CXAX

9 Heat Recovery, Digit 24

9.1 None Heat Recovery, Digit 24 = X

All refrigerant’s heat is rejected to the atmosphere.

9.2 Partial Heat Recovery (PHR), Digit 24 = 2

9.2.1 Application

When part of the rejected heat needs to be recovered and will be reused for the production of

hot water.

9.2.2 Description

One brazed plate heat exchanger per circuit is placed on the discharge line between the

compressor and the condenser coil as shown in the following picture (CXAX). The system

has neither freeze protection nor isolation on water side.

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Figure 12 CXAX PHR diagram

Image 19 PHR's location

9.2.3 Operation

At the discharge line of the compressor, refrigerant is de-superheated by transferring its

sensible heat to the water which will rise its temperature. At full load conditions (PHR EWT=

40°C / LWT=45°C - OAT = 35°C - EVAP EWT= 12°C / LWT= 7°C), 20% of the cooling

capacity can be recovered.

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Figure 13 PHR’s Operating map

Even if the heat exchanger has on site water connections, the customer shall provide the

water loop for partial heat recovery; that means: a circulation pump provides constant

water flow rate from the tank; three-way valve to adjust the water flow of PHR heat

exchanger based on the heat exchanger leaving water temperature (As the leaving water

temperature increases, the PHR water flow rate increases) and safety elements such as

expansion tanks and safety valves

Figure 14 Customer's connection diagram

9.2.4 Benefits

- Recuperation of part of the heating rejected capacity.

- Energy saving

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10 Starter type, Digit 26 Starters installed have an IP-54 gasketed enclosure. It is a protection index which is able to

protect the starters against dust deposit and splash water projection from all directions.

10.1 Across the Line Starter/Direct on Line Digit 26= A

This is the standard starter located in electrical panel of the unit.

Image 20 Direct on Line starter

10.2 Solid-state Soft Starter Digit 26 = B

Image 21 Soft starter

28 | P a g e

10.2.1 Application

To reduce inrush current when the compressors start.

10.2.2 Description

Factory-installed, located in electrical panel of the unit.

10.2.3 Operation

- In this circuit, the soft starter replaces the direct on line starter.

- It controls the current flow which will generate the compressors to start gradually.

10.2.4 Benefits

- With the soft starter, the starting current drops down to 2.5 - 3 IN (IN: nominal

intensity).

- The compressor can start smoothly as the starting current is reduced.

- Smooth starting reduces motor and compressor wear.

- Less stress on the power supply.


Direct on Line.

10.2.6 More detail

There is a device called Silicon Controlled Rectifier (SCR) that soft starter works with. The

SCR is an electronic switch which allows current to flow through it only when electronic signal

is applied to its gate.

Comparison between across line starter and soft starter:

By installing soft starter in the circuit, it will reduce the starting current. There are 5 different

size of compres

Table 6 Inrush currents

Table 9 starting times

As shown in table 8, inrush current is reduced by installing soft starter to the electrical circuit.

Thus, the compressor will be started up with small quantity of current and it improves the

stability of the power supply. In table 9, it shows that the compressor with soft starter will

take more time to run than with across the line starter. It means that the compressor starts

progressively.

Compressor

size

7,5 10 12 13 15

Across Line

(A) (()Starter

(A)

98 142 147 158 197

Soft Starter

(A)

59 85 88 95 118

% current

reduction

39 40 40 40 40

Compressor

size

7,5 10 12 13 15

Across (Line

Starter (ms) 70 70 100 100 68

Soft Starter

(ms) <500 <500 <500 <500 <500

29 | P a g e

Figure 15 Inrush current vs time (Left DoL starter - Right Soft starter)

11 Refrigerant detector, Digit 29

11.1 Without, Digit 29 = X

No refrigerant leak detector.

11.2 With refrigerant detector, Digit 29 = 2

• Refrigerant detector option

– Available only on R454B units.

– Factory installed and set according R454B critical thresholds

11.2.1 Description:

Refrigerant leak detector is available only on R454B units. A refrigerant detector is placed in

each circuit, inside the unit, close to the compressors and below the electrical cabinet.

11.2.2 Application:

The refrigerant detector allows detecting a refrigerant leak, which avoids the risk of the

flammability. It ensures safety for the customer by taking appropriate actions in the case of the

leak

11.2.3 Operation:

• Two relays available: Relay 1 for warning + Relay 3 for critical

– Customer needs to connect to these relays

0 200 400 600

Am

ps

Time (ms)0 200 400 600

Am

ps

Time (ms)

30 | P a g e

– On wiring diagrams: detector is identified as 3A6 and is on line 596/597

– When reaching warning / critical levels of R454B concentrations, customer has to

shutdown the electrical power to the unit

– Customer can use a disconnect switch upstream from CGAX/CXAX operated

remotely that will open electric circuit to the unit when there is a refrigerant leak

12 Human interface, Digit 30

The human interface will let the operator control chiller’s water set points, scheduling,

enable/disable options, etc…

Figure 16 Control architecture

12.1 Without interface, Digit 30= X For starting the chiller it’s necessary to have an interface even if the chiller was ordered

without it. The customer won’t have any information of chiller’s operation except if it’s

connected to BMS. Also only remote ON/OFF would be possible.

12.2 Interface PGD1, Digit 30= A

12.2.1 Description

Hu

ma

n in

terf

ace

PD

G1

or

PD

G T

ou

ch

31 | P a g e

This panel has a greyscale display, for programing the chiller and view operation values.

For details, see CH535 user guide.

Image 22 PGD1 Interface

13 Smart Com protocol, Digit 31

Image 23 CH535 Controller

32 | P a g e

Figure 17 CH535 Communication terminal

13.1 No remote digital communication, Digit 31 = X

13.2 Modbus interface, Digit 31 = 1

Image 24 RS485 Serial card

13.2.1 Application

When the unit needs to communicate with a Modbus network at the unit level.

13.2.2 Description

- BMS RS485 serial card. , allows direct interfacing with an RS485 network.

- Modbus index are in file CGAX-CXAXProtocole_datalists.xls available on Litweb.

13.2.3 Incompatibility:

- Other communication cards

13.3 LonTalk® interface, Digit 31 = 2

Image 25 LonTalk® interface card

13.3.1 Application

Allows CH535 controller to communicate on a LonTalk® network at the unit level.

13.3.2 Description

- Inputs and outputs for LonTalk® communication with Trane or LonTalk® BMS.

- Allows connecting to a LonTalk® TP/FT 10 network.

33 | P a g e

- LonTalk NV and names are in file CGAX-CXAXProtocale_datalists.xls available on

Litweb



13.4 BACNet™ Interface; Digit 31= 4

Image 26 BACnet™ interface card

13.4.1 Application

Allows CH535 controller to communicate on BACnet network at the unit level.

13.4.2 Description

- Allows connecting the controller to a BACnet MS/TP (Master/Slave Token pass) net-

work.

- BACnet object ID are in file CGAX-CXAXProtocale_datalists.xls available on Litweb



14 External customer input/output option, Digit 32


14.2 With, Digit 32 = A

14.2.1 Package included:

• Customer inputs:

Auxiliary Set point validation.

External water Set point*.

External current demand limit Set point

• Customer outputs:

Programmable relays (x4)

14.2.2 Relay costumer information

For more details, Refer to table 22 of the IOM

34 | P a g e

14.2.3 Wiring diagram:

Figure 18 CH535 Extension terminal

LEGEND

Device

Designation Description

6F1 Fuse, customer supplied, programmable relays

6K1 Relays, customer provided, unit status, unit is running

6K2

Relays, customer provided, unit status (Programmable), default is latching alarm -

circuit 1

6K3

Relays, customer provided, unit status (Programmable), default is latching alarm -

circuit 2

6K4 Relays, customer provided, unit status (Programmable), default is chiller limit mode

Table 7 Components' description

14.2.4 Description

35 | P a g e

- Auxiliary water Set point: It’s another set point for leaving water temperature that can

be switched with the front panel set point.

- External water Set point: Based on an external signal input (0-20mA or 4-20mA), it

will be possible to offset the active set point from 0°C to 20°C.

- External current demand limit set point: limits the maximum number of running

compressors in order to control chiller power consumption.

- % Capacity output: Indicates the percentage of load in which the unit is operating.

14.2.5 More detail

More information in User Guide CG-SVU007 available on LitWeb.

*Note: Automatic water reset based on the outside ambient temperature is a STD possibility:

Active cold water set point based on outside air temperature could be configured on CGAX or

CXAX cooling mode and also active hot water set point based on outside air temperature for

CXAX heating mode.

36 | P a g e

15 Smart Sequencer, Digit 33


16 Hydraulic module, Digit 35 The hydraulic module will be factory mounted as shown, pending the chosen option.

The picture below shows its components:

Figure 19 Hydraulic module diagram

1 VALVE FOR PRESSURE POINT 1/4" Gas NPT

2 WATER STRAINER 1,6 mm Staintless Steel 304

3 EXPANSION TANK

4 SAFETY RELIEF VALVE 4 Bar

5 WATER PUMP

6 CHECK VALVE

7 AIR RELEASE VALVE

8 TEMP. SENSOR

9 FLOW SWITCH

10 DRAIN VALVE 1/2" Gas NPT

37 | P a g e

16.1 No pumps and no contactors, Digit 35 = X

Hydraulic module is not integrated in the unit; the costumer provides pump and pump’s

electrical systems.

16.2 Contactors single pump, Digit 35 = 2 Hydraulic module is not integrated in the unit, the customer provides the pump but there will

be power and control supply from the unit, on the electrical panel.

Size (Ton) Pump Current (A)

015 4-6,3

017 4-6,3

020 4-6,3

023 4-6,3

026 4-6,3

030 4-6,3

036 6-10

039 6-10

045 6-10

035 6-10

040 6-10

046 6-10

052 6-10

060 6-10

Table 8 Contactors operating current

16.3 Contactors dual pump, Digit 35 = 4

The customer provides dual pump, but there will be power and control supply from the unit.

(NOTE: Redundancy pump operation) Two contactors from Table 12, will be provided.

16.4 Single pump standard pressure, Digit 35 = 5

16.4.1 Application

Simplifies installation of the unit.

16.4.2 Description

38 | P a g e

Image 27 Single pump hydraulic module

- The supplier is Grundfos.

- The pump is integrated into unit’s hydraulic module.

16.4.3 Pump reference:

Pumps available:

CGAX / CXAX STD Pressure Sizes Pump

015 AC 25-109

017 AC 25-109

020 AC 25-109

023 AC 25-116

026 AC 25-116

030 AC 25-116

036 AC 25-116

039 AC 25-125

045 AC 25-125

035 AC 25-116

040 AC 25-125

046 AC 25-125

052 AC 25-125

060 AC 25-125

Table 9 Standard head available pumps

16.4.4 Operation / Benefits

- Compact design: Pump and motor are integrated in a compact and user-friendly

design, the pump is fitted to a low-profile base plate, making it ideal for installation in

systems.

- High reliability: State-of-the-art mechanical shaft seal design and materials offering

high wear resistance and long operative life. Also the pumps are less sensitive to

impurities in the pumped liquid.

AC 25 - 109 Size of the pump

case Diameter of the impeller

(mm)

39 | P a g e

- Low noise level: The AC pumps offer very silent operation.

16.4.5 Material specification

Description Material

Pump housing Composite PP 30 % GF

Impeller Composite, brass

Table 10 Material specification


Figure 20 Standard head pumps performance

16.4.7 Electrical data

Pump type P1 [kW] P2 [kW] IN [A] Cos ϕ1/1 n1/1 [min-1]

AC 25-109 1,20 0,87 2,44 0,75 2838

AC 25-116 1,50 1,26 3,5 0,72 2892

AC 25-125 2,30 1,90 5,03 0,78 2863

Table 11 Standard head pumps electrical data

16.5 Single pump high pressure, Digit 35 = 6

16.5.1 Application

When the requested available pressure is not archived by the standard pressure pumps.

0

20

40

60

80

100

120

140

160

180

200

220

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

P [

kP

a]

Q [lps]

AC 25-109

AC 25-116

AC 25-125

40 | P a g e

16.5.2 Description

Pumps available:

CGAX / CXAX High Pressure Sizes Pump

015 AC 25-125

017 AC 25-125

020 AC 25-125

023 AC 25-125

026 AC 25-125

030 AC 25-125

036 AC 30-142

039 AC 30-142

045 AC 30-142

035 AC 30-142

040 AC 30-142

046 AC 30-142

052 AC 30-142

060 AC 30-142

Table 12 High head available pumps

16.5.3 Operation / Benefits

Same as single pump standard pressure.

16.5.4 Material specification

Same as single pump standard pressure.


Figure 21 High head pumps performance

16.5.6 Electrical data

Pump type P1 [kW] P2 [kW] IN [A] Cos ϕ1/1 n1/1 [min-1] AC 30 3,00 2,56 6,20 0,78 2865

Table 13 High head pumps electrical data

16.6 Dual pump standard pressure, Digit 35 = 7

0

30

60

90

120

150

180

210

240

270

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

P [

kP

a]

Q [lps]

A…AC 30-142

41 | P a g e

Image 28 Dual pump hydraulic module

16.6.1 Application

Guard pump for increasing reliability of the water circulation

16.6.2 Description

Just one of the pumps works at the time, the other is in stand-by but in case there is a failure

on the active pump the other will take the place automatically.

16.6.3 Dual pump high pressure, Digit 35 = 8

It’s the same but uses the high pressure single pump.

17 Smart Flow Control, Digit 36

17.1 No pump flow control; Digit 36 = X

The pump will always work at its nominal speed and the customer will have to use balancing

valves to adjust the operation point.

17.2 Manual flow control, Digit 36 = B

17.2.1 Application

The goal of this alternative is to provide appropriate flow rate and hydraulic balance, without

the need of mechanical balancing valve, but, taking advantage of the energy consumption

optimization of the pump.

17.2.2 Description

Unit is equipped with a pump package driven by a speed inverter, but without providing

continuous modulation of the speed, the water flow is fixed during the commissioning.

Image 29 VFD Interface representation

42 | P a g e

17.2.3 Operation

The pump speed limits must be set during the chiller commissioning, and in accordance with

below rules:

• Pump speed high limit should be referenced to the Nominal Water Flow Rate

• Pump speed low limit should be referenced to the Minimum Water Flow Rate

Figure 22 Frequency vs Speed behavior

Important note: When VPF works at 30 Hz, the absorbed power of the pump get reduced by

80% compared to 50Hz pump operation.


No pumps and no contactors option; Digit 35 = X

17.3 Variable primary flow (Constant ΔT), Digit 36 = C

17.3.1 Application

The goal of this alternative is to provide a flow rate in order to maintain constant the delta

between the inlet and outlet temperatures in the evaporator. This solution can be applied on

water loops with 2 or 3 ways valves, and can deliver higher energy saving than constant DP

in the majority of the comfort applications.

17.3.2 Description

With this option, Conquest chillers will be equipped with a pump package driven by a speed

inverter, the modulation of the pump speed is handle to ensure that chiller DT keeps

constant. At minimum system partial load, minimum flow rate must be ensured through the

chiller evaporator.

43 | P a g e

Figure 23 Contant ΔT Control diagram

17.3.3 Operation

Entering and Leaving temperatures at the evaporator will be measured directly by the chiller

controller, through the sensors factory supplied. A Delta T set point will be preset on the unit

controller.

Figure 24 Control’s logic


- No pumps and no contactors option; Digit 35 = X

- Multiple units on primary loop (Means that Smart sequencer is also incompatible.

44 | P a g e

18 Buffer tank, Digit 37

18.1 Without Buffer tank; Digit 37 = X

18.2 Buffer Tank, Digit 37 = 1

18.2.1 Application

- Used to increase water chiller inertia

- Allows to meet the two minutes water loop circulation

- Stable water temperature operation

18.2.2 Description/Operation

- Consists in a tank of water placed before the pump, Factory-installed

- Placed below the unit structure

- It doesn’t modify unit dimensions but the height increases +330mm

Image 30 Unit w/o buffer tank & with it

Image 31 Buffer tank & Hydraulic module

45 | P a g e

18.2.3 Volumes

Size Buffer Tank Volume (L)

015

324

017

020

023

026

030

036

444

039

045

035

040

046

052

060

Table 14 Buffer tank Volumes


No contactors and no pumps hydraulic module option.

19 Installation accessory, Digit 39

19.1 None, Digit 39 = 1

19.2 Neoprene Pads, Digit 39 = 4

19.2.1 Application

Used to avoid direct contact of the chiller and the ground.

19.2.2 Description

They are installed under the chiller.

46 | P a g e

Figure 25 Location of the pads

Shipped on the hanging eyes.

Image 32 Neoprene pads

A 90 mm

B 225 mm

Thickness 8 mm

47 | P a g e

Figure 26 Neoprene pads dimensions

19.2.3 Operation/Benefits

Avoid direct contact of the base frame with the ground.

19.2.4 Inconvenience

Neoprene pad do not filter effectively the vibrations.

19.2.5 More detail

The vibration level of the scroll chiller is 1 mm/s at a fundamental frequency of 49 Hz and

harmonics at 97 145.5 194 242.5 and 291 Hz

48 | P a g e

20 Acoustic level, Digit 41

CGAX/CXAX

Noise Level

Digit 41

SIMPLEX

015/017/020/023/026/030

SIMPLEX LARGE

036/039/045

DUPLEX

035/040/046/052/060

SN (D41=3)

LN (D41=4)

HESP

(D41=2)

Table 15 CONQUEST's aspect depending on acoustic level

20.1 Standard Noise (SN), digit 15 = X

20.1.1 Application

When the unit is requested for a non-noise sensitive area.

20.1.2 Description

The fans are placed below the roof.

20.1.3 Operation

The chiller operates with a sound power level in between 83 to 89 dB(A)

20.2 Low Noise (LN), digit 15 = L

20.2.1 Application

49 | P a g e

When the unit is requested for a noise sensitive area.

20.2.2 Description

20.2.3 Operation/Benefits

Low noise units are equipped with a pre-formed ’sound box’ encapsulating each compressor,

as a consequence it will attenuate acoustical diffusion. It’s sound level will be in between 77

to 83 dB(A).

Figure 27 Low noise differences from Std

- Compressors are insulated with sound jacket attenuator.

- Diffusor on condenser’s fans to avoid turbulent flow of the air through the

fans so fans area above the roof.

- Even with the reduction of the sound level, the other unit performances are same as Standard noise version.

50 | P a g e

Figure 28 Sound levels

20.3 HESP, Digit 41 = 2

20.3.1 Application

When the air flow will be ducted.

20.3.2 Description

EC fans with a stronger motor will be used to provide high external static pressure up to 100

Pa

Image 33 HESP fans dimensions

20.3.3 Operation

- Provide airflow similar to standard/low noise unit but the sound level increases.

- Sound level is provided by the mobile TOPSS selection software.

51 | P a g e

21 Condenser protection, Digit 42

21.1 No option, Digit 42 = X

21.2 Condenser guard grill, Digit 42 = A

21.2.1 Application

The unit is requested for polluted, susceptible to be damaged or a persons’ high frequency

areas.

21.2.2 Description

Protection Grills are made of stainless steel, and they are available as a factory-fitted option in order to protect the external coil. Guard grill are affixed with screws and can be easily removed on site.

• Grill shall prevent any user from injury caused by contact with fins. • Grill shall limit coil clogging due to dust and other external objects. • Grill shall protect the coil from the hail. • Grill causes reduced air pressure drop (less than 10 Pa at nominal airflow).

Image 34 Condenser guard grill

Image 35 Guard grill structure

c = 0,5 mm

W = 2 mm

P = 2,5 mm

Vacuum coef. = 64%

52 | P a g e

22 Literature Language, Digit 44 Literature language, Digit 44

A Bulgarian

B Spanish

C German

D English

E French

H Dutch SI (Netherland)

J Italian

K Finish

L Danish

M Swedish

N Turkish

P Polish

R Russian

T Czech

U Greek

V Portuguese

W Slovene

Y Romanian

Z Norwegian

1 Slovak

2 Croatian

3 Hungarian

Table 16 Languages Codes

23 Under/over voltage protection, Digit 45

23.1 None, Digit 45 = X

23.2 Included, Digit 45 = 1

23.2.1 Application

A RM4 TR relay is used to control unit phase sequence and under/over voltage protection.

23.2.2 Description

- Factory installed, located in the control panel.

- Only one relay for each unit.

53 | P a g e

Image 36 RM4 TR Relay

23.2.3 Operation

- If any fault linked is detected, the compressor is stopped.

- Overvoltage and undervoltage detection (RM4TR):

o In normal operation, the relay is energized and LEDs U and R are lit.

o If the average of the three voltages between phases fluctuates outside the

range to be monitored, the output relay is de-energized.

- Overvoltage: the Red LED “> U” on

- Undervoltage: the Red LED “< U” on

23.2.4 Benefits

- All motors are fully protected.

- Relay RM4 TR provides a phase reversal protection and under/over voltage

protection

23.2.5 Summary

Phase reveral protection Under/over voltage protection

Compressors Fans (and pump) Compressors Fans (and pump)

CGAX - CXAX Digit 45 = X YES YES NO NO

CGAX - CXAX Digit 45 = 1 YES YES YES YES

Image 37 Available protections

24 Suplemental Heat Control, Digit 49


24.2 With, Digit 49 = 1

24.2.1 Application

When the heating capacity of the heating pump isn’t enough, supplemental heat is required

and so a controller.

R Yellow LED: Indicates the relay state. U Green LED: Indicates that the relay power supply is on. > U Red LED: Overvoltage fault. < U Red LED: Under voltage fault. P Red LED: Phase failure or phase

reversal.

54 | P a g e

Figure 29 Supplemental heat location & Control

24.2.2 Description

- The electric heaters for supplemental heat are provided by the customer.

- 3 stages of electric heaters (Maximum) can be controlled with 3 digital outputs (dry

contacts); the number of stages is configurable by the user.

- The control is based on LIFO logic (Last In First Out).

24.2.3 Inconvenient

- No possibility to disable electric heater on an outdoor temperature condition or

through digital input from customer.

- No modulating heat output.


CGAX

25 Design Special, Digit 50

55 | P a g e

Trane - by Trane Technologies (NYSE: TT), a global climate innovator - creates comfortable, energy efficient indoor environments for commercial

and residential applications. For more information,

please visit trane.eu or tranetechnologies.com.

Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice.

Confidential and proprietary Trane information

CG-PRC037B-GB_0821 ©2021 Trane

Supersedes CG-PRC037B-GB_0817

option guide

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