Trane CXAJ series, CXAJ045, CGAJ series, CGAJ045, CGAJ065 Installation, Operation And Maintenance Manual

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Page 1

Modular Air-Cooled Chiller (Heat Pump) Unit

CXAJ/CGAJ

Jan. 2016

PKGP-SVX06A-EN

Installation, Operation and Maintenance

690134220001

Safety Warning

Only qualiﬁed personnel may install and maintain the unit. The installation, start-up and maintenance of heating, ventilating and air-conditioning unit will be hazardous, and the operator shall have speciﬁc knowledge and training. Improper installation, adjustment or change of the unit by an unqualiﬁed person will result in death or serious injury. When operating the unit, pay attention to all precautions in the documents and the tags and labels attached to the unit.

Page 2

Table of Contents

General Information ………………………………………………………………………………… 3

Safety Precautions …………………………………………………………………………………… 4

Nomenclature ………………………………………………………………………………………… 5

Dimensions …………………………………………………………………………………………… 6

Performance Data …………………………………………………………………………………… 7

Unit Installation ……………………………………………………………………………………… 9

Electrical Installation ……………………………………………………………………………… 15

Wiring Diagram …………………………………………………………………………………… 17

Pre-Start-up ………………………………………………………………………………………… 22

Unit Operation …………………………………………………………………………………… 29

Module Control System ………………………………………………………………………… 35

Building Control System ………………………………………………………………………… 48

Troubleshooting …………………………………………………………………………………… 50

Maintenance ……………………………………………………………………………………… 60

Page 3

This manual is the customer property, which shall be used with the unit. Please put it back to the tecŠical information bag after the completion of the work, and keep it properly.

Please read this manual carefully before installing the air conditioning unit, and install and maintain the unit according to this manual to ensure the normal and reliable operation of the unit. Installation of the air conditioning unit must be completed by the professional designated by Trane Company. If the installation or maintenance is done by unqualified personnel or fails to comply with the requirements of this manual, the manufacturer shall not be held responsible.

This manual does not purport to cover the differences among various units or all problems that may be encountered in the installation, and impossibly provides guidance for all possibilities in the installation. If you want to get more information or face any special problem that is not explained in this manual, please contact your local Trane sales office.

This manual contains a Checklist for Installer to Apply for Commissioning, and you may use the checklist to check and confirm whether all necessary installation steps are completed. Reading the checklist does not mean reading the contents of this manual, and you should read this manual carefully before the installation.

Dangers, Warnings and Cautions can be found in different parts throughout this manual. In order to ensure personal safety and normal operation of the unit, please read these contents carefully and follow them.

Danger:

Indicates a potentially hazardous situation which, if ignored, could result in death or serious

injury.

Warning:

Indicates a potentially hazardous situation which, if ignored, could result in minor or moderate

injury. It could also be used to alert against unsafe practices.

Caution:

Indicates a potential damage to the unit which, if ignored, could result in damage to the unit

or property losses, or possible environmental pollution. It is also be used to provide useful information. The information might be beneficial to the operation of the unit or extension of the service life of the unit. But it does not mean that the information is optimal or is directly related to the improvement of unit operation.

Warning

Lock the power supply and cutoff switch of the air conditioning unit at the disconnected state before installation or maintenance in order to avoid the personal death or injury caused by electrical shock or contact with moving parts. All installation procedures of the air conditioning unit must comply with the national, provincial and local regulations.

Refrigerant Warning

Please do not use substandard refrigerants, refrigerant substitutes or refrigerant additives. Improper use method or use of substandard refrigerants, refrigerant substitutes or refrigerant additives will cause damage to the air conditioning unit and various safety risks. Please select acceptable refrigerants or call 8008208676 to purchase acceptable refrigerants. All technical personnel using refrigerants must have the qualiﬁcations, be familiar with and strictly follow the relevant technical requirements, laws and regulations for use, handling, recovery and recycling of refrigerants.

General Information

Page 4

In order to avoid electrical shock or fire, and other injuries that may be caused, the following rules should be kept in mind and strictly adhered to:

•

The unit power supply and the electric heating power supply must be equipped with an electric leakage protection device, and must be connected to the grounding wire; otherwise, injury or even death and other accidents may occur if unprotected.

•

The specification of the power wire shall meet the requirements, otherwise there may be accidents related to circuit safety.

•

Please use a fuse appropriate for the current intensity.

•

Do not use any temporary substitute, such as a piece of wire, which not only may damage the unit itself, but also may cause fire.

Ok!

Using a piece of wire may cause ﬁre.

•

In order not to exceed the capacity of the power meter and the protector, please do not simultaneously switch on the electric heating for the air conditioner and the electric heating for the water tank. The use of all types of electrical appliances shall be coordinated.

•

Please connect the wires in strict accordance with the wiring diagrams in this manual. Improper wiring or artificial change of wiring will result in unit failure and damage, or endanger personal safety.

•

The condensate water from the indoor and outdoor units must be drained according to the requirements. Improper drainage of the condensate water may lead to adverse consequences.

•

Never sit on the direct air duct at any time. Sitting on the direct air duct is not conducive to your health and safety.

•

In order to prevent the relief valve failure due to calcification, fouling and blockage, the user should check the valve at least once every month. If the local water quality is poor, the check interval should be shortened appropriately. Please promptly replace the relief valve with a new valve with reliable quality if blockage, corrosion, manual operation failure or damage to manual pressure relief handle is found.

•

A heating device or other heat source shall not be arranged under or near the air conditioner. The machine body may be deformed by heating.

•

Objects, such as sticks, sands or gravels, shall be avoided from entering the air inlet grid or air outlet grid. Fans running at high speed are very dangerous, and children should be kept away from them.

•

Never block or cover the air inlet grid or air outlet grid. If such case happens, it may reduce the performance and affect the normal operation capacity.

•

Whenever you operate the machine, make sure the air filter net is installed correctly. Otherwise, dirt may enter the internal running position and cause damage.

•

When cleaning the machine, do not sprinkle water directly on the machine, which may lead to electric shock.

•

Before maintenance, make sure the unit is powered off to prevent electric shock.

•

When the unit is not used for a long period, you should cut off the power supply and drain the water from the water tank. After the water is drained, do remember to close the drain valve. If the water tank is under frozen conditions for a long time, it may be damaged.

Safety Precautions

Page 5

Nomenclature

Model:

C X A J 0 6 5 5 B

1 2 3 4 5 6 7 8 9

Additional options:

1 H S D R A

10 11 12 13 14 15

Maintenance code:

C X A J 0 6 5 5 B 1 H S D R A

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Digit 1 C= Chiller Digit 2 X=Heat pump G=cooling only Digit 3 A=air cooled Digit 4 J= modular type Digit 5,6,7 Model (cooling capacity)

045 (45kW) 065 (65kW) 130 (130kW)

Digit 8 Voltage/Hertz/Phase

5=380V/50Hz/3PH

Digit 9 Design Sequence

Digit 10 Fan speed

1=single speed

Digit 11 Energy efficiency( unit type)

N=standard efficiency H=High efficiency

Digit 12 Controller

S=modular controller (units ≥2) U=unit controller (unit =1) N=None

Digit 13 Service Sequence

D=4th time

Digit 14 Ambient temperature

R=Standard

Digit 15 Connector option

C=Without 2 pcs. of DN125 rubber connector D= With 2 pcs. of DN125 rubber connectors

Digit 16 BMS interface

M=Modbus module N= NONE

Digit 17 Refrigerant charged

A=without 045 065 130 B=with

Digit 18 Option

A=None B=Special option T=leaving water control (digit 11 = N)

Page 6

2145

1987

຤

৊຤

613

1521

927

727

2038

DN125

951

2155

ړ႐ةۉ

ටᇵฅྨ.

ሞྼႪമසࡕփൎ܏ۉᇸ,ࣷሰׯჹዘڦ

ሞྼႪമൎ܏໯ᆶڦۉᇸ,Ԉઔᄫևݴ.

ᆶۉླ၃!

injury or death.

servicing can cause severe personal

Failure to disconnect power before

BEFORE SERVICING.

INCLUDING REMOTE DISCONNECTS

DISCONNECT ALL ELECTRIC POWER

HAZARDOUS VOLTAGE !

য়!!!ߢ

WARNING



ޅૐૐǄඤǅ຤ఇፇ

 ႙

ఁᅭ዆ૐଉ

KW KW

ఁᅭ዆ඤଉ

ຕ ଉ

უ໫A

ܮۨۉୁ

܂ገۉୁ

ࠀ ୲

უ໫B

ۉ ᇸ: ۉუ

VHz

ೕ୲

၎ຕ

ሎႹ၌უ૰:

຤֨

MPaMPa

ૐ௃֨

 ࡽ

ૐඐ຤ୁଉ

m3/h m3/h

ૐ۳຤ୁଉ

ૐ௃؊࠺ଉ

dB(A)

ሯำ

ፇዘଉ

༬ଳۙဣཥǄዐࡔǅᆶ၌ࠅິ

1426

2145

1987

຤ ৊຤

613

2038

1476

2020

1862

1521

2155

DN125

ޅૐૐǄඤǅ຤ఇፇ

 ႙

ఁᅭ዆ૐଉ

KW KW

ఁᅭ዆ඤଉ

ຕ ଉ

უ໫A

ܮۨۉୁ

܂ገۉୁ

ࠀ ୲

უ໫B

ۉ ᇸ: ۉუ

VHz

ೕ୲

၎ຕ

ሎႹ၌უ૰:

຤֨

MPaMPa

ૐ௃֨

 ࡽ

ૐඐ຤ୁଉ

m3/hm3/h

ૐ۳຤ୁଉ

ૐ௃؊࠺ଉ

dB(A)

ሯำ

ፇዘଉ

༬ଳۙဣཥǄዐࡔǅᆶ၌ࠅິ

Dimensions

CXAJ045/065 (N/H type)

CXAJ130 (N/H type)

Page 7

Performance Data

Performance data for Modular Air-cooled Chiller (Heat Pump) Unit (N Type)

Model CXAJ045 CXAJ065 CXAJ130 CGAJ045 CGAJ065 CGAJ130

Cooling

Nominal cooling capacity kW 45 65 130 45 65 130

Input power kW 14.2 20.4 40.8 14.2 20.4 40.8

Operating current A 33.0 41.4 82.8 33.0 41.4 82.8

Heating

Nominal heating capacity kW 47 67 132 - - -

Input power kW 15.0 20.2 40.4 - - -

Operating current A 33.4 41.4 82.8 - - -

Compressor

Type Hermetically sealed scroll compressor

Quantity 只 2 2 4 2

2 4

Nominal cooling power kW 6.1 9.2 9.2 6.1 9.2 9.2

Nominal cooling current A 13.8 18 18.0 13.8 18 18

Nominal heating power kW 6.5 9.1 9.1 - - -

Nominal heating current A 14 18 18.0 - - -

Refrigerant

Type R410A

Charge kg 13 14.3 15*2 13 14.3 15*2

Water side

Type of heat exchanger High efficient shell and tube heat exchanger

Water flow CMH 7. 7 4 11. 2 22.4 7. 74 11.2 22.4

pressure loss kPa 40 40 68 40 40 68

Water pipe flange mm DN125 DN125 DN125 DN125 DN125 DN125

Air side

Type of heat exchanger High efficient fin type heat exchanger

Quantity of fans Piece 2 2 4 2 2 4

Rated power of fan kW 1.0 1.0 1.0 1.0 1.0 1.0

Rated current of fan A 2.7 2.7 2.7 2.7 2.7 2.7

Fan diameter mm 710.0 710.0 710.0 710.0 710.0 710.0

Fan speed RPM 710 710 920 710 710 920

Fan air volume CMH 12000 12000 12700 12000 12000 12700

Unit

Power supply V/PH/HZ 380/3N~/50

Noise dB(A) 68.5 69 69.6 68.5 69 69.6

Net weight kg 700 730 1320 700 730 1320

1. The refrigeration capacity is measured in the conditions of water inlet at 12℃, water outlet at 7℃ and air inlet at the ambient temperature of 35℃.

2. The heating capacity is measured in the conditions of water inlet at 40℃, water outlet at 45℃ and air inlet at the ambient dry bulb temperature of 7℃ and the wet bulb temperature of 6℃.

3. CXAJ/CGAJ045 unit shall conform to the standard GB/T 18430.2-2008; CXAJ/CGAJ065/130 unit shall conform to the standard GB/T 18430.1-2007.

Page 8

TecŠical Parameter Table for Modular Air-cooled Chiller (Heat Pump) Unit (H Type)

Model CXAJ045 CXAJ065 CXAJ130 CGAJ045 CGAJ065 CGAJ130

Cooling

Nominal cooling capacity kW 45 65 130 45 65 130

Input power kW 14.2 19.2 38.8 14.2 19.2 38.8

Operating current A 33.0 37.2 75.2 33.0 37.2 75.2

Heating

Nominal heating capacity kW 47 67 132 - - -

Input power kW 15.0 19.4 39.2 - - -

Operating current A 33.4 41.4 82.8 - - -

Compressor

Type Hermetically sealed scroll compressor

Quantity 只 2 2 4 2

2 4

Nominal cooling power kW 6.1 8.6 8.7 6.1 8.6 8.7

Nominal cooling current A 13.8 15.9 16.1 13.8 15.9 16.1

Nominal heating power kW 6.5 8.7 8.8 - - -

Nominal heating current A 14 16.1 16.3 - - -

Refrigerant

Type R410A

Charge kg 13 15 16*2 13 15 16*2

Water side

Type of heat exchanger High efficient shell and tube heat exchanger

Water flow CMH 7. 7 4 11. 2 22.4 7. 74 11.2 22.4

pressure loss kPa 41 60 75 46 60 75

Water pipe flange mm DN125 DN125 DN125 DN125 DN125 DN125

Air side

Type of heat exchanger High efficient fin type heat exchanger

Quantity of fans Piece 2 2 4 2 2 4

Rated power of fan kW 1.0 1.0 1.0 1.0 1.0 1.0

Rated current of fan A 2.7 2.7 2.7 2.7 2.7 2.7

Fan diameter mm 710.0 710.0 710.0 710.0 710.0 710.0

Fan speed RPM 920 920 920 920 920 920

Fan air volume CMH 12000 12000 12700 12000 12000 12700

Unit

Power supply V/PH/HZ 380/3N~/50

Noise dB(A) 68.5 69 69.6 68.5 69 69.6

Net weight kg 730 780 1350 725 775 1340

1. The refrigeration capacity is measured in the conditions of water inlet at 12℃, water outlet at 7℃ and air inlet at the ambient temperature of 35℃.

2. The heating capacity is measured in the conditions of water inlet at 40℃, water outlet at 45℃ and air inlet at the ambient dry bulb temperature of 7℃ and the wet bulb temperature of 6℃.

3. CXAJ/CGAJ045 unit shall conform to the standard GB/T 18430.2-2008; CXAJ/CGAJ065/130 unit shall conform to the standard GB/T 18430.1-2007.

Performance Data

Page 9

Unit Installation

Key Installation Points

Acceptance

When receiving the unit, please carefully check whether the unit is damaged in the transport. If any, please record it in the delivery note and notify in written form within 72 hours. Notify the final carrier of the petition in written form within 72 hours, and simultaneously inform the local Trane sales office. Please thoroughly inspect the unit within 7 days after arrival of the goods. If any damage is found, please immediately notify the carrier and the local Trane sales office.

Inspect whether the nameplate contents of the unit are correct and whether the operating power supply is consistent with that on the nameplate of each component. The maximum deviation of the supply voltage shall not be more than 10%.

Hoisting

Please use a forklift or crane with proper tonnage to handle this unit to its installation location.

Hoisting method:

Table of External Dimensions and Weight Parameters

Model CXAJ045 CGAJ045 CXAJ065 CGAJ065 CXAJ130 CGAJ130

External Dimensions (mm) 2145*1000*2155 2145*1000*2155 2145*2020*2155

Weight of N Type 700 700 730 730 1320 1320 Weight of H Type 730 725 780 775 1350 1340

Installation location

•

The unit must be installed on a flat and level plane;

•

It is better to install the shockproof rubber cushion, which is arranged between the host unit and its load to absorb vibration;

•

In the installation, the drainage, ventilation and maintenance space as well as others shall be considered. Refer to the installation space diagram for the recommended minimum maintenance space;

•

It is necessary to consider the bearing capacity of the building in the installation to arrange the unit base

Page 10

Unit Installation

AIR OUT

AIR IN

SERVICE

SPACE

≥1

.2M

≥1.2M

≥1

.2M

610

য় ߢ

ටᇵฅྨ.

ሞྼႪമසࡕփൎ܏ۉᇸ,ࣷሰׯჹዘڦ

ሞྼႪമൎ܏໯ᆶڦۉᇸ,Ԉઔᄫևݴ.

ᆶۉླ၃!

injury or death.

servicing can cause severe personal

Failure to disconnect power before

BEFORE SERVICING.

INCLUDING REMOTE DISCONNECTS

DISCONNECT ALL ELECTRIC POWER

HAZARDOUS VOLTAGE !

WARNING

য় ߢ

ටᇵฅྨ.

ሞྼႪമසࡕփൎ܏ۉᇸ,ࣷሰׯჹዘڦ

ሞྼႪമൎ܏໯ᆶڦۉᇸ,Ԉઔᄫևݴ.

ᆶۉླ၃!

injury or death.

servicing can cause severe personal

Failure to disconnect power before

BEFORE SERVICING.

INCLUDING REMOTE DISCONNECTS

DISCONNECT ALL ELECTRIC POWER

HAZARDOUS VOLTAGE !

WARNING

Installation Space Diagram

PUMP



TER OUTLET

TER INLET

MODULAR GROUP C

MODULAR GROUP B

MODULAR GROUP A

≥1.5M ≥1.5M

Multi-module Combination Diagram (Reverse Return Connection)

Note:

each CXAJ/CGAJ045/065 multi-mod ule combination includes 8 units at most, and each CXAJ/CGAJ130 m ultimodule combination includes 4 units at most. Direct return connection is not allowed.

Page 11

Unit Installation

Note:

CX AJ/CGAJ045/065 single-module com bination includes 8 reverse return connection units at most, and CXAJ/ CG AJ130 single-module combination includes 4 reverse return connection units at most.

Note:

CX AJ/CGAJ045/065 single-module combination includ es 4 direct return connection units at most, and CXAJ/ CG AJ130 single-module combination includes 2 direct return connection units at m ost.

Single-module Combination Diagram (Reverse Return Connection)

Single-module Combination Diagram (Direct Return Connection)



TER

INLET

PUMP

WATER OUTLET

WATER INLET

PUMP

WATER

OUTLET

Page 12

Unit Installation

Blind flange

The water pipe interface blind flange necessary for the installation of the end unit is show in the diagram below:

210

245

Name: blind flange Material: No.20 Specification: 5", PN1.6

Water pipeline

•

Clean all chilled water pipelines.

•

connect the evaporator pipeline.

•

Exhaust the air in the chilled water system at the highest point of this system.

•

Install the pressure gauge, the thermometer and the valve in the water inlet and outlet pipes.

•

Install the filter in the water inlet pipe of the evaporator.

•

Install the balance valve and the flow switch at the water outlet.

Cautions

•

If the washing the pipe with acid solvent, a temporary by-pass pipe shall be arranged beside the unit for fear of damaging the evaporator.

•

Never use the untreated or improperly treated system water for fear of damaging the machine.

•

Refer to Connection Diagram for Water System for the installation location of each typical accessory on the water supply pipeline of the unit. The pipe components may vary with the locations of connectors and water source.

•

To avoid damaging the unit, do not reversely install the system water pipe. The water inlet pipe must be connected to the water inlet connector marked with “water inlet”. The water outlet pipe must be connected to the water outlet connector marked with “water outlet”.

•

The exhaust valve shall be arranged at the highest point of the pipeline in order to exhaust the air in the chilled water system.

•

The water pressure of the evaporator shall not be more than 0.5 MPa (i.e. maximum working pressure) for fear of damaging the parts and components on the chilled water side of the unit.

•

Before the final pipe connection of the unit, all external water supply piping systems shall be thoroughly flushed. It is strictly prohibited to be mixed with sundry in the piping system, otherwise our company will not be responsible for the consequences.

Connection of water pipeline

The circulating water pump must be installed on the water inlet pipe of the evaporator to ensure that the internal pressure of the evaporator is positive pressure. Refer to Figure 1 for the installation

Page 13

Unit Installation

locations of all fittings on the water supply pipeline.

ķ: Pressure gauge ĸ: Shockproof hose Ĺ: Thermometer ĺ: exhaust valve

Ļ: Tree-way valve ļ: Shutoff valve Ľ: Filter ľ: Drain valve Ŀ

: Balance valve

Water outlet

(3)

Unit

(4)

(1)

(2)

Water inlet

Figure 1. Installation Drawing for Typical Pipeline Fittings

The description of Figure 1 is as follows: Pressure gauge: displaying the water inlet and outlet pressure. Thermometer: displaying the water inlet and outlet temperature. Balance valve: controlling the water flow. Shutoff valve: used for disconnecting the host unit and the water pump when maintaining. The

shutoff valves are required to be installed on the water inlet and outlet pipes. Filter: preventing the evaporator from being contaminated and blocked. Drain valve: draining the residual water in the pipeline when the machine is shut down. Tree-way valve: used when the evaporator is cleaned.

Cautions

•

All units must be equipped with the filters which can filter the particles with the diameter larger than 1 mm to ensure that the impurities cannot enter the evaporator.

•

Never use the untreated or improperly treated system water for fear of damaging the unit. Otherwise, TRANE will not be responsible for the unit damage therefrom.

•

After the installation of water pipeline is completed, please firstly close the shutoff valves 2 and 3, open the shutoff valves 1 and 4, the open the water pump, and flush the debris in the water pipe residual in the water pipe with water onto the filter; then close the shutoff valves 1 and 4, remove the filter and cleanup the dirt on the filter, and reinstall the filter. Repeat the above operation till there is no dirt on the filter. Therefore, the evaporator can be prevented from being blocked.

•

The chiller water pipe must be insulted to prevent condensation. If the pipeline may be exposed below 0 ℃, the pipeline must be equipped with the heating resistor.

•

When the ambient temperature is below 16℃ in winter, do not cut off the power supply, and preheat the unit 24 hours ahead of start-up, otherwise the compressor will be damaged.

Page 14

Unit Installation

System Connection Diagram

Direct Return

Connection

Disdirect Return

Connection

Expansion tank

Feed-water

Drain valve

Overflow

Tree-way valve

FCUFCU

Exhaust valve

Drain valve

Pump Filter

Shockproof hose

Electric heater

Flow switch

Drain valve

Thermometer

Pressure gauge

Shutoff valve

Backup other pump is recommended

Principle Description

1. In order to avoid pipe rupture caused by the excessive pressure inside the system pipeline when the ambient temperature changes and prevent the pneumatic hammer from occurring in the pipeline, a pressure water tank is added on the pipe system.

2. To avoid the internal pressure is too high or low inside the pipeline, a water compensation valve and a drain valve are added. When the pressure is lower than 0.6 bar, the water compensation valve will be automatically opened for water compensation; when the pressure is higher than 5 bars, the drain valve will automatically open the drain pipe for drainage.

3. The water compensation pressure can be adjusted according to actual conditions.

Page 15

Electrical Installation

Electrical Wiring

•

Connect the power wire to the main terminal board (TB) of the distribution box for the unit.

•

Connect the control panel with the main control board of the unit through the control panel (indoor mounted) connecting cable. See pages 18-24.

•

If the unit is not provided with the water pump, connect the control wire of the chilled water pump to the corresponding terminal of the chilled water pump.

•

Ground the unit, the chilled water pump motor (for the unit with water pump) and all devices to be grounded.

•

If the electric heater is provided, connect the power wire and the control wire to the terminal TB2 of the electric heater.

•

If the two-way valve of the fan coil is used for interlocking control, it is necessary to set SW27(N Type) or SW1-7(H Type) to “ON” on the control board and connect the interlocking point (dry contact) between the control box terminals 12(N Type) or 19(H Type) and U.

•

Connect the flow switch between the control box connecting terminals U and 15 of the unit.

Warning

• To prevent injury or death, disconnect electrical power supply before completing wiring connections to the unit.

Caution

• The terminals can be connected only through the copper conductors so as to avoid corrosion or overheating. Refer to the electrical parameter table for the minimum current, the fuse speciﬁcations and the electrical speciﬁcations of the motor.

Power Supply

Please refer to the wiring diagram on the cover plate of the control box for the unit. The installer shall provide a power supply with correct voltage and a suitable breaker for the unit. The variation of input power should be limited at ±10%.

Cautions

For the 380V~ unit adopts the scroll compressor, the phase reversing and loss protection controller is installed which should be checked with electricity connection before start-up.

If the green light of the phase reversing and loss protection controller in the control box is on, it means the phase sequence is right; red light being on means the phases of power wiring should be exchanged; and the yellow light means lacking phase which need check with electricity disconnection.

In any case that the phases are reversed or lacked, the unit will shut down its operation and start-up automatically.

Page 16

Electrical Data

Model

Power

Supply

(V/Hz/ph)

Fullload

current

of water

pump

FLA

Rated current of No.1

compressor

RLA

Rated

current

of No.2

compressor

RLA

Rated current of No.3

compressor

RLA

Rated current of No.4

compressor

RLA

Rated current of No.1

fan

FLA

Rated current of No.2

fan

FLA

Rated current of No.3

fan FLA

Rated

current

of No.4

fan

FLA

Minimum

circuit

current of

unit

MCA

Recommended

fuse

specification

REC

Maximum

specification

of fuse

MFS

Minimum

specification

of copper core wire

diameter for

power wire

CX(G)AJ0455 380/50/3

18.6 18.6 2.1 2.1 46.05 50.70 64.65 16

CX(G)AJ0655 380/50/3

20.8 20.8 2.1 2.1 51.00 56.20 71.80 16

CX(G)AJ1305 380/50/3

20.8 20.8 20.8 20.8 2.1 2.1 2.1 2.1 92.60 97.80 113.40 35

Electrical Installation

Page 17

Wiring Diagram

The following wiring diagrams are for reference only. The accompanied wiring diagrams shall prevail.

(11)

(14)

+12VGND

CN1

ABG

Chiller's Water Pump Contactor

Fan Motor Contactor

Compressor Start Contactor

Description

Name

Description

Name

Description

Name

Compressor

Crankcase Heater

Plate Heat Exchanger Heater

Water Circuit Based

Electrical Heating Control

Water Pump

Alarm Output/Input

Fan Motor

Common Neutral Line

Energy Saving/

2- Way Valve Interlock

Run Output/Input

Outer Cool/Heat Pump Setting

Compressor Overload/Overheat

Fan Motor Overheat

Water Pump Overload

Flow Switch

High Pressure Switch

Low Pressure Switch

Terminal Board

Phase Sequence Controller

4 Way Valve

Field Wiring

Factory Wiring

Water flow switch need connect between 15 and U

DIP setting (sw1,sw2) according to IOM

MC1-1

312 710

RUN

MF1

FLOW

LP1

OV-COMP2

OV-COMP1

HP1

OV-FAN

OV-PUMP

LP2

HP2

N-COM

C／H

COMP2

M/FAN2

H/FAN1

A-HAT

4WV2

HE/EV1

4WV1

PUMP

COMP1

RUN_OUT

RUN_IN

AL_OUT

AL_IN

EN-SAVE

CON1

CON2

MF1

8 11

TH2

TH1

TH3

TH4

TH5

TH6

690134120001

C/H

RUN-OUT/IN

EN-SAVE

N-COM

AL-OUT/IN

H/FAN

PUMP

A-HAT

HT/EV1

COMP

CCH

4WV

OVP

OVF

OVC

MF2

MC1-2

MC2-1

MC2-2

Wiring Diagram

(connected network and module mode)

RFS

Reserved control signal for controlling water pump and heating

Pump Overload Switch(close) Connect 16 and U

Note:

Compressor Location

ADC_OD_C01

power

Water Inlet Sensor

Water Outlet Sensor

Control panel

(Option)

TO CONTROL WIRING

CCH1-2

CCH1-1

MC1-2

MC1-1

MC1-2

COMP 1-2

3 ~

(L2)

(L3)

MC1-1

COMP 1-1

3 ~

TB1

380Vac 3N~50Hz

FAN

MOTOR 1-2

3 ~

220Vac

RFS

FAN

MOTOR 1-1

3 ~

OVC1-1

OVC1-2

CGAJ1305 (N Type)

(L2)

(L3)

MC2-2

(L1)

COMP 2-2

3 ~

(L1)

(L2)

(L3)

MC2-1

COMP 2-1

3 ~

FAN

MOTOR 2-2

3 ~

FAN

MOTOR 2-1

3 ~

OVC2-1

OVC2-2

CCH2-2

CCH2-1

MC2-2

MC2-1

(L1)

(L2)

(L3)

(L1)

(L2)

(L3)

(L1)

(L2)

(L3)

(L1)

(L2)

(L3)

(L1)

(L2)

(L3)

(L1)

(Two Compressors)

Microprocessor Control Board

Transformer

SW2

SW1

CN4

HP2

LP1

OVC1-1

LP2

HP1

OVC2-1

OVC1-2

OVC2-2

Mian Controller

connect with other units(correspond)

CN6

RFS

NUV

1-1

1-2 2-2

2-1

ControlBox

Page 18

Wiring Diagram

+12VGND

CN1

ABG

Energy Saving/

2- Way Valve Interlock

Outer Cool/Heat Pump Setting

Compressor Overload/Overheat

Flow Switch

Water Pump Overload

Low Pressure Switch

High Pressure Switch

4 Way Valve

Chiller's Water Pump Contactor

Fan Motor Contactor

Compressor

Crankcase Heater

Compressor Start Contactor

Water Pump

Fan Motor

Water Circuit Based

Electrical Heating Control

Terminal Board

Alarm single

Description

Name

Description

Name

Field Wiring

Factory Wiring

CN1

CN2

CN6

SW2

SW1

CN4

OVCA-1

OVCA-2

Mian Controller(Option)

connect with other units(correspond)

TH2

TH1

TH3

TH4

HEAT

FAN

PUMP

4WV

4MV

OV-FAN

OV-PUMP

LP1

FLOW

OV-COMP

N-COM

EN-SAVE

OV-HEAT

EG-SAVE

RFS

COMP

MC1

AL_IN AL_OUT

FLOW

HP1

OVP

Control panel

(Option)

C/H

EN-SAVE

FAN

PUMP

HT/EV

COMP

CCH

4WV

OVPMPFS

OVC

Compressor Location

HT/EV

MC2

Power

Water Inlet Sensor

Water Outlet Sensor

Defrost Sensor1

Defrost Sensor2

Pump Overload Switch(close) Connect 11 and U

Flow Switch Connect 10 and U.

Code Switch Seting reference IOM.

Reserved control signal for controlling water pump and heating

No valve and Deforst sensor at cooling only.

Note:

COMP

Transformer

35613

(11)

(14)

TO CONTROL WIRING

CCH2

CCH1

MC2

MC1

(L2)

(L3)

MC2

(L1)

COMP A-2

3 ~

(L2)

(L3)

MC1

COMP A-1

3 ~

380Vac 3N50Hz

FAN

MOTOR A-2

3 ~

(L2)

(L3)

(L1)

FAN

MOTOR A-1

3 ~

(L2)

OVC1

OVC2

(L1)

(L3)

(L1)

Control Board

RFS

NUV

345

A-1

A-2

Control Box

CX(G)AJ 045/065 (N Type)

Wiring Diagram

690128970002

SW2˖ 5ǃ6˖ 00 Heatpumpˈ11 Refrigeration

7˖ 0 Normalˈ1 2-Way Valve Interlock

8˖ 0 Singleˈ1 Modul

220V

Page 19

Wiring Diagram

(11)

(14)

+12VGND

CN1

ABG

Water flow switch need connect between 15 and U

DIP setting (sw1,sw2) according to IOM

Chiller's Water Pump Contactor

Fan Motor Contactor

Compressor Start Contactor

Description

Name

Description

Name

Description

Name

Compressor

Crankcase Heater

Plate Heat Exchanger Heater

Water Circuit Based

Electrical Heating Control

Water Pump

Alarm Output/Input

Fan Motor

Common Neutral Line

Energy Saving/

2- Way Valve Interlock

Run Output/Input

Outer Cool/Heat Pump Setting

Compressor Overload/Overheat

Fan Motor Overheat

Water Pump Overload

Flow Switch

High Pressure Switch

Low Pressure Switch

Terminal Board

Phase Sequence Controller

4 Way Valve

Field Wiring

Factory Wiring

MC1-1

312 71045

RUN

MF1

FLOW

LP1

OV-COMP2

OV-COMP1

HP1

OV-FAN

OV-PUMP

LP2

HP2

N-COM

C／H

COMP2

M/FAN2

H/FAN1

A-HAT

4WV2

HE/EV1

4WV1

PUMP

COMP1

RUN_OUT

RUN_IN

AL_OUT

AL_IN

EN-SAVE

CON1

CON2

ADC_OD_C01

MF1

8 11

TH2

TH1

TH3

TH4

TH5

TH6

690134120003

C/H

RUN-OUT/IN

EN-SAVE

N-COM

AL-OUT/IN

H/FAN

PUMP

A-HAT

HT/EV1

COMP

CCH

4WV

OVP

OVF

OVC

MF2

MC1-2

MC2-1

MC2-2

4WV1

4WV2

Wiring Diagram

(connected network and module mode)

Compressor Location

Reserved control signal for controlling water pump and heating

Pump Overload Switch(close) Connect 16 and U

Note:

RFS

power

Water Inlet Sensor

Water Outlet Sensor

Defrost SensorA-1

Defrost SensorB-1

Defrost SensorA-2

Defrost SensorB-2

Control panel

(Option)

TO CONTROL WIRING

CCH1-2

CCH1-1

MC1-2

MC1-1

(L2)

(L3)

MC1-2

(L1)

COMP 1-2

3 ~

(L2)

(L3)

MC1-1

COMP 1-1

3 ~

TB1

380Vac 3N~50Hz

FAN

MOTOR 1-2

3 ~

220Vac

RFS

FAN

MOTOR 1-1

3 ~

(L2)

(L3)

(L1)

OVC1-1

OVC1-2

CXAJ1305 (N Type)

(L2)

(L3)

MC2-2

(L1)

COMP 2-2

3 ~

(L1)

(L2)

(L3)

MC2-1

COMP 2-1

3 ~

FAN

MOTOR 2-2

3 ~

FAN

MOTOR 2-1

3 ~

OVC2-1

OVC2-2

CCH2-2

CCH2-1

MC2-2

MC2-1

(L1)

(L2)

(L3)

(L1)

(L2)

(L3)

(L1)

(L2)

(L3)

(L1)

(Two Compressors)

Microprocessor Control Board

Transformer

HP2

LP1

SW2

SW1

OVC1-1

LP2

HP1

OVC2-1

CN4

OVC1-2

OVC2-2

Mian Controller

connect with other units(correspond)

CN6

RFS

NUV

1-1

1-22-2

2-1

ControlBox

Page 20

Wiring Diagram

CX(G)AJ130 (H Type)

Page 21

Wiring Diagram

CX(G)AJ045/065 (H Type)

Page 22

Pre-Start-up

Voltage Range

The power supply of the unit must comply with the operating power supply marked on the nameplate of this unit, and the supply voltage and the voltage imbalance between phases must be within the following scope. The voltage between phases shall be measured, and the voltage reading must be within the allowable voltage tolerance (±10%) shown on the nameplate of this unit. If the voltage between any two phases is not within this tolerance, the electric power company shall be notified to improve before operate this unit. Improper voltage will result in the disorder of control function and shorten the service life of various electrical components and compressor motors.

Voltage Imbalance

If the voltage imbalance between any two phases in the three-phase power system is too high, it will cause motor overheating and motor failure. The maximum permissible imbalanced voltage is 2%, and the voltage imbalance is defined as follows:

Voltage imbalance % =

100x|Va-Vd|

Wherein Va=(V1+V2+V3)/3(average voltage) V1,V2,V3＝line-to-line voltage Vd＝maximum line-to-line voltage deviated from Va

Water Flow

The chilled water flow through the unit must be between the upper and lower limits listed in

Table 1. If the chilled water flow entering the evaporator is lower than the lower limit, it will

cause discontinuous flow, reduce the heat transfer effect and cause the expansion valve out of control or abnormal low pressure shutdown. On the contrary, if the water flow is higher than the upper limit, the parts and components inside the evaporator will be eroded.

Table 1. Water Flow

Unit: m3/h

Type Lower flow limit Rated flow Upper flow limit Pipe diameter

CX(G)AJ045 4.64 7. 7 4 10.84 DN125

CX(G)AJ065 6.71 11. 18 15.65 DN125

CX(G)AJ130 13.4 22.4 31.6 DN125

Water Pressure Drop

The water pressure difference between the water inlet and outlet ends of the unit is measured to obtain the external head under this water volume, and this external head shall be basically shown in External Head Curve. If the standard unit including the water pump is used, refer to External Head Curve for the design of the pipeline system. If the unit (the water pump is installed outside the unit) excluding the water pump is used, the internal water pressure drop of the unit shall be basically shown in Unit Water Pressure Drop Curve. If the unit excluding the water pump is used, refer to Unit Water Pressure Drop Curve for the design of the pipeline system.

Page 23

Pre-Start-up

Inspection Items before Start-up

•

Inspect the connection of all wires. All electrical contacts shall keep clean and tight.

•

Inspect whether the supply voltage of the unit is normal.

•

Fill with water in the chilled water circuit. Keep the exhaust valve of the system open when filling with water. Close the exhaust valve after filling with water.

•

Short-circuit the flow switch wire, and test the water system.

•

Switch on the main power supply, and press ON/OFF button on the control panel to start the unit. At this time, the water pump should be started, and water is circulated in the chilled water system. Inspect for leakage at all pipe connections.

•

Adjust the water flow in the chilled water circuit, and inspect the external water pressure (for the standard unit) or evaporator pressure drop (for the unit including the water pump) of the unit.

•

Stop the operation of water pump. Turn off all power supplies.

•

Connect the flow switch to the contact on the terminal board of the control box.

Caution

When the water pump operates, adjust the water ﬂow to 50% of the Rated ﬂow, and adjust the contact of the ﬂow switch to open circuit. Please use the ohmmeter to verify the on and off of the switch contact.

Warning

When the ambient temperature is below 16℃ in winter, do not cut off the power supply, and preheat the unit 24 hours ahead of start-up, otherwise the compressor will be damaged.

Page 24

Pre-Start-up

Figure 2. Characteristic Diagram for Water Pressure Drop

Internal Pressure Drop of Unit Internal Pressure Drop of Unit

CX(G)AJ045

CX(G)AJ065

CX(G)AJ130

Water Pressure DropǄmH

OǅWater Pressure DropǄmH

Oǅ

Water Pressure DropǄmH

OǅWater Pressure DropǄmH

Oǅ

Water FlowǄm3/hǅ

Water FlowǄm

/hǅ

Water FlowǄm

/hǅ

Water FlowǄm

/hǅ

Water FlowǄm

/hǅ

Water FlowǄm

/hǅ

Internal Pressure Drop of Unit

6.71 7.83 8.94 10.06 11.18 12.30 13.42 14.53 15.65

CX(G)AJ045

CX(G)AJ065

CX(G)AJ130

Internal Pressure Drop of Unit

4.64 5.42 6.19 6.97 7.74 8.51 9.29 10.06 10.84

13.44 15.68 17.9 220.16 22.4 24.6426.88 29.12 31.36

13.44 15.68 17.9220.16 22.4 24.64 26.88 29.1231.36

4.64 5.41 6.18 6.95 7.72 8.49 9.26 10.0310.80

Water Pressure Drop Curve

6.72 7.83 8.94 10.05 11.16 12.27 13.38 14.49 15.60

N Type H Type

Page 25

Pre-Start-up

Make sure the water flow in the reasonable range ( 60%--130% rated water flow) Before unit start-up or commissioning, set the functions and operating parameters according to

the following methods. The unit function setting is mainly defined through the jumper, the dial switch and the system bit. The incorrect setting will cause the faulty operation of the unit and even shutdown!

Jumper Setting

The jumper JP1 is used for software version control. If JP1 is unplugged, the software can be downloaded; if JP1 is short-circuited, the system will normally operate.

Dial Switch Setting (N Type Unit)

The DIP switch SW1 is used for the centralized control of address bit coding and is used to set the address of each unit on the networking control. The DIP switch SW2 is used to define the main functions of the unit. The definition of each bit is shown in the following table, in which Bit4 only effective for the double-compressor unit.

Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 Bit8

Mode C/H Fan type EnSave Control

Mode:

00 Normal operating mode 01 Computer monitoring mode 10 System self-inspection and configuration mode 11 On-site commissioning mode

C/H:

0 "External cooling/heating switch" disabled 1 "External cooling/heating switch" enabled

Fan:

0 Single fan 1　Double fans

Type:

00 Heat pump+electrical heater 01　Cooling+electrical heater 10 Cooling+electrical heating 11　Cooling

EnSave:

0 Conventional 1　Two-way valve interlocking

Control:

0 Single-unit control 1　Module control

System Bit Setting (N Type Unit, Realized through Centralized Controller or Single Unit Controller)

The system bit is one byte in the memory and can be set through the Single Unit Controller (the password “55” shall be inputted), and each bit is defined as follows.

Bit8 Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1

Temp Flow void Ambient Mode Defrost Pulse Auto

Page 26

Pre-Start-up

Auto: （135）

0　Need manual start-up (by default) when powering on 1　Allow automatic start-up (in case of power-down in running state) when powering on

Defrost:（136, only single unit controller）

0　“Manual defrosting” disabled (by default) 1　 “Manual defrosting” enabled

Flow : （133）

0　“Water flow switch mode” disabled (by default) 1　“Water flow switch mode” enabled (if the switch is still closed within 30 seconds after the

water pump is stopped, the alarm will be issued)

Temp: （134）

0　“Suction temperature” enabled 1　“Suction temperature” disabled

DIP Switch Setting (H Type Unit)

Definition of SW1 Functions

Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 Bit8

Modular IP Type EnSave Control

The bits 1-5 of this switch is used for the centralized control of address coding. (Note: 00 must be set for the host unit of this modular unit.)

SW1: centralized control of address setting

Number

SW1 Switch

1 2 3 4 5

0 (the centralized controller displays A0) OFF OFF OFF OFF OFF 1 (the centralized controller displays A1)

OFF OFF OFF OFF

2 (the centralized controller displays A2) OFF

OFF OFF OFF

3 (the centralized controller displays A3)

ON ON

OFF OFF OFF

4 (the centralized controller displays A4) OFF OFF

OFF OFF

5 (the centralized controller displays A5)

OFF

OFF OFF

6 (the centralized controller displays A6) OFF

ON ON

OFF OFF

7 (the centralized controller displays A7)

ON ON ON

OFF OFF

8 (the centralized controller displays A8) OFF OFF OFF

OFF

9 (the centralized controller displays A9)

OFF OFF

OFF

10 (the centralized controller displays AA) OFF

OFF

11 (the centralized controller displays AB)

ON ON

OFF

12 (the centralized controller displays AC) OFF OFF

ON ON

OFF

13 (the centralized controller displays AD)

OFF

ON ON

OFF

14 (the centralized controller displays AE) OFF

ON ON ON

OFF

15 (the centralized controller displays AF)

ON ON ON ON

OFF

16 (the centralized controller displays B0) OFF OFF OFF OFF

Page 27

Pre-Start-up

17 (the centralized controller displays B1)

OFF OFF OFF

18 (the centralized controller displays B2) OFF

OFF OFF

19 (the centralized controller displays B3)

ON ON

OFF OFF

20 (the centralized controller displays B4) OFF OFF

OFF

21 (the centralized controller displays B5)

OFF

22 (the centralized controller displays B6) OFF

ON ON

OFF

23 (the centralized controller displays B7)

ON ON ON

OFF

24 (the centralized controller displays B8) OFF OFF OFF

ON ON

The bits 6-8 of this switch is used for setting the functions of the unit. See the table below.

6 7 8

Type En-Save Control

Type

0 Heat pump 1 Cooling only

En-Save

0 Conventional 1 Two-way valve interlocking Note: this function is invalid when “module control” is selected.

Control

0 Single-unit control 1 Module control

Bit Function Switch (H Type Unit, Set through Single Unit Controller, Centralized Controller, etc.)

Bit8 Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1

Reserved

Detection

of full-water

flow switch

Reserved Reserved Reserved

Manual

defrosting

Reserved Reserved

Full-water Flow Switch Detection (Code: 133)

0 “Full-water flow switch detection” invalid (by default) 1 “Full-water flow switch detection” valid (if the full-water flow switch detection is set to

valid, and the water flow switch is still turned on after “water flow switch detection delay time”, the fault alarm will be given.)

Manual Defrosting (Code: 136, only single unit controller)

0 “Manual defrosting” invalid (by default) 1 “Manual defrosting” valid Manual defrosting can be set by inputting the password “55” through the single unit controller

and the centralized controller.

Page 28

Pre-Start-up

Default Switch Setting

N Type

Mode

SW1

Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 Bit8

Modular IP Void Void Void

All OFF OFF OFF OFF OFF OFF OFF OFF

Mode

SW2

Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 Bit8

MODE C/H FAN TYPE ENSAVE CONTROL CXAJ045/065 OFF OFF OFF OFF OFF OFF OFF OFF CXAJ045/065 OFF OFF OFF OFF

ON ON

OFF OFF

CXAJ130 OFF OFF OFF

OFF OFF OFF OFF

CGAJ130 OFF OFF OFF

ON ON ON

OFF OFF

Bit1-5 of SW1, Bit8 of SW2 need adjust by actual jobsite

H Type

Mode

SW1

Bit1 Bit2 Bit3 Bit4 Bit5 Bit6 Bit7 Bit8

Modular IP Type En-Save Control CXAJ045/065 /130 OFF OFF OFF OFF OFF OFF OFF OFF CXAJ045/065 /130 OFF OFF OFF OFF OFF

OFF OFF

Bit1-5 and Bit8 of SW1 need adjust by actual jobsite

Operating Parameter Setting

The unit protection parameters and the operating parameters can be set in the shutdown mode through the Single Unit Controller. The set values of the default parameters are shown in the table below.

Code of Single Unit Controller / Centralized Controller

Parameter Setting Maximum Minimum

Regulation

Precision

Factory Setting

016

Set temperature for COOLING mode

℃

017

Set temperature for HEATING mode

℃

022

Anti-freezing temperature in winter

℃

001 Defrosting interval 90min 30min 1min 45min 002 Minimum defrosting time 8min 1min 1min 3min

Password input range 75 50 - 50

For N Type unit：setting temperature of cooling should above 10℃，or will has E3 alarm.

Page 29

Unit Operation

Start Steps

•

Power on the unit, press MODE button on the Single Unit Controller to select cooling or heating after 120 seconds, and then press ON/OFF button on the Single Unit Controller to start the unit.

•

When the unit operates for over 30 minutes and the system steadily operates, inspect the following items to ensure the normal operation of the unit:

1. Inspect whether the water flow and water pressure readings of the unit are stable and within the normal range.

2. Test the high and low pressures of the unit. During the normal operation, the low pressure shall be 85-145 psig (0.586-1.0 MPa), and the high pressure shall be 290-500 psig (2.0-3.45 MPa).

3. Inspect the current reading of the compressor.

4. Inspect the power supply.

5. Measure the system superheat degree. In ARI conditions (water inlet temperature of 12.2 ℃, water outlet temperature of 6.7 ℃, ambient temperature of 35 ℃), the normal system superheat of each circuit is 5-8 ℃. The superheat measured on any circuit is beyond this range, the superheat setting on the expansion valve shall be regulated to obtain a proper reading. Wait for 15 to 30 minutes to make the new set value stable after each adjustment of expansion valve.

6. Measure the system sub-cooling degree. In ARI conditions, the normal system sub-cooling degree of each circuit is 5-10 ℃. If the sub-cooling degree measured on any circuit is beyond this range, necessary adjustment shall be made after the inspection of circuit superheat. If the superheat is normal but the sub-cooling degree is abnormal, please contact the professional maintenance personnel.

7. If the system leakage is found, the leakage point shall be found out to repair, and then the gaseous refrigerant shall be charged into the circuit. When the unit operates, the refrigerant is charged from the low pressure pipe till the operating pressure is normal. If the operating pressure is low, and the sub-cooling degree is low, it will indicate that the refrigerant is insufficient.

8. If the operating pressure shows that the refrigerant is excessive, the refrigerant shall be recycled slowly at the liquid pipe (to minimize the loss of refrigerant oil as far as possible).

9. The start and stop unit below 4 times in an hour.

•

Make sure all temperature sensors are installed at the correct position, and the capillary tubes of the temperature sensors must be firmly fixed in order to avoid vibration and abrasion.

•

Inspect the unit and remove the wastes, the tools and the parts. Fix all shell plate metal parts including the control panel and the compressor access plate, and install all screws to the original places.

Long-term Shutdown

•

If this system is not used for a long time, the followings shall be done before shutdown:

1. Inspect whether the refrigerant pipe leaks or not. If any, be sure to repair it.

2. Maintain the water pump and the air conditioning equipment as recommended by the manufacturer.

3. Empty the circulating water in the system, unscrew the water drainage opening in the water supply and return circuit, disassemble the side panel of the unit, unscrew the water

Page 30

Unit Operation

drainage opening at the bottom of the water pump and the shell and tube heat exchanger to ensure that the circulating water is drained off.

4. Turn off the power switches of the unit and water pump.

Cautions

•

In winter, it is necessary to close the water supply valves of all evaporators, open the drain valve and the exhaust valve on the unit pipeline to drain the water in the evaporator, and then install the drain plug. For the ultra-thin ceiling unit, first drain off the water in the pipeline, and then open the drain valve at the bottom to drain off the residual water in the evaporator. If the water in the chilled water pipe cannot be fully drained off, the proper antifreeze liquid can be injected to prevent the residual water from being frozen and thus damaging the unit.

Start this System after Long-term Shutdown

1. Open the valves of the water return and supply pipes, and fill with clear water into the chilled water pipe. Be sure to exhaust when filling with water. After the system is filled with water, close the exhaust valve.

2. Short-circuit the wire of the flow switch to measure the water system.

3. Turn on the power switch of the unit.

4. Press ON/OFF button on the control panel to start the unit. When the chilled water is circulated in the water system, inspect whether all pipe connectors leaks or not.

5. Adjust the water flow of the chilled water pipe through the balance valve, and inspect the water pressure of the unit.

6. Adjust the flow switch (installed on the water outlet pipe of the unit) to ensure the normal operation.

7. Press ON/OFF button on the control panel to start or stop the unit.

8. Reconnect the wire of the flow switch.

At this time, the unit can normally operate.

Caution

When the water pump operates, adjust the water flow to the half of the maximum flow, and disconnect the contact of the flow switch. Please use the ohmmeter to verify on and off of the switch contact.

System Protection

Low-pressure protection (LP1, LP2) (N Type Unit Only)

The unit is under the protection of the low pressure switch. When the operating pressure is lower than 21±7 psig (0.1145±0.048 MPa), the operation of compressor will be stopped; when the operating pressure is up to 36±7 psig (0.248±0.048 MPa), the compressor will be automatically reset. There will be 2-minute short circuit when starting to avoid unnecessary shutdown.

High-pressure protection (HP1, HP2)

The unit is under the protection of the high pressure switch. When the high pressure is higher than 602±22 psig (4.15±0.15 MPa), the operation of compressor will be stopped; when the pressure is reduced to 479±22 psig (3.303±0.152 MPa), the compressor will be automatically reset.

Page 31

Unit Operation

Function of antifreezing in winter

When the unit is in the standby mode in winter and the water temperature is lower than the set antifreezing temperature in winter, the unit automatically starts antifreezing operation, and “AP” is displayed. Thus, when the unit is in the standby mode in winter when it is easy to freeze, the power supply of the unit shall be switched on.

Antifreezing of shell and tube heat exchanger

When the water temperature is lower than 3 ℃ in the cooling mode, the compressor will be turned off, the water pump continues to run, and “E3” is displayed.

Motor overload protection

•

Compressor motor overload and overheat protection.

•

Water pump motor overload protection.

•

Fan motor overload protection.

•

Temperature probe protection.

If the temperature probe fails, the system will give an alarm and stop.

*All alar m protection is manually reset. It is necessary to remove the fault and then press Reset key or restart or shut down to recover the system.

Low suction pressure protection (cooling mode) ) (H Type Unit Only)

When the low pressure of any system is lower than 620kPa in the cooling mode, the system shall be continuously detected for 60 seconds; if the low pressure is still below 620 kPa, the compressor of this system shall be forcibly turned off, otherwise the compressor will continue to run. Judgment is not performed in the first 3 minutes of initial operation of any compressor for any system; judgment is not performed during the defrosting period.

This protection is allowed to occur once at most within 1 hour; if this protection occurs twice within 1 hour, shut down and give an alarm, and display the code “78” (A system) or “7A” (B system) on the single unit controller.

Suction anti-freezing protection

In the cooling mode, if the following conditions are met, the compressor will be turned off, the electrical heater for the water circuit will be started, the water pump will continue to run, and the code “E4” will be displayed on the single unit controller.

1. When the suction temperature of any system is lower than or equal to -3 ℃, start counting, and meet the above conditions after 30 seconds;

2. When the water outlet temperature is higher than or equal to the refrigeration antifreezing exit temperature (coil/plate type heat exchanger), the electrical heater for the water circuit is stopped. When this fault occurs, the refrigeration plate type heat exchanger antifreezing locking time is locked; after the refrigeration plate type heat exchanger antifreezing locking time is up, if all suction temperature is higher than or equal to 3 ℃, this fault can be reset through the single unit controller or the centralized controller. After reset, the water pump will still continue to run and then shut down.

The low suction temperature protection will be shielded within 30 seconds after any compressor is started.

High temperature protection(cooling mode) (H Type Unit Only)

In the cooling mode, if the fin temperature of any system is higher than 68 ℃ for 5 seconds, the fin temperature will be considered too high, and the unit will be shut down and give an alarm.

Page 32

Unit Operation

The fault code is “98”. In the cooling mode, when the fin temperature of any system is lower than or equal to 58 ℃, the

compressor of this system is allowed to run.

Ambient temperature over range protection (H Type Unit Only)

The ambient temperature range for the unit to reasonably run is 15 to 48 ℃ for cooling and -15 to 25 ℃ for heating. If beyond the range when starting, prohibit to start and report a fault code; if beyond the range for 3 minutes after starting, automatically shut down and report a fault code. The fault code is “87”.

Automatic set heating temperature adjustment protection (H Type Unit Only)

In the heating mode, when the ambient temperature is lower than 0 ℃, the set heating temperature is set by the controller according to the following formula, and the user has no right to set the water temperature:

a) When the ambient temperature is higher than or equal to -15 ℃ and lower than 0 ℃, the set heating temperature is equal to ambient temperature*0.667+50;

b) If the ambient temperature is lower than -15℃, the set heating temperature is equal to 40 ℃. The set heating temperature is updated every 30 minutes according to the ambient temperature,

and is increased or reduced by 1 ℃ each time. When the heating is started, if the ambient temperature is higher than or equal to 0 ℃ and the

set heating temperature is lower than 45 ℃, the set heating temperature will be automatically changed to the factory set value (45 ℃).

Flow protection

To avoid the evaporator freezing caused by the reduction of water flow, a flow switch (or other flow sensing devices) shall be installed on the evaporator water pipe. Its set value must ensure that the operation of compressor will be stopped immediately if the water volume is lower than 70% of the system design full flow.

Unit Operation (N Type)

Temperature sensor (TH1)

The temperature sensor (TH1) senses the water inlet temperature of the system as the basis for compressor start or stop in the refrigeration and Heating modes.

Cooling mode:

Dual system

When the system is started, the water pump operates immediately. Two minutes later, the water pump continues to operate. When the water return temperature is over 13 ℃, No.1 compressor will be started. One minute later, if the water return temperature is over 15 ℃, No.2 compressor will be started. If the cooling requirement is reached, the water return temperature will be reduced to 11 ℃, and No.1 compressor will be stopped. If the water return temperature is continuously reduced to 10 ℃, No.2 compressor will be stopped. Then, the load is increased, the water return temperature rises to 13 ℃, and No.1 compressor is restarted. If the water return temperature continuously rises to 15 ℃, No.2 compressor will run. Unless the unit is shut down, the water pump will keep running.

Page 33

Unit Operation

Single system

When the system is started, the water pump operates immediately. Two minutes later, the water pump continues to operate. When the water return temperature is over 15 ℃, the compressor will be started. If the cooling requirement is reached, the water return temperature will be reduced to 10 ℃, and the compressor will be stopped. Then, the load is increased. If the water return temperature rises to 15 ℃, the compressor will be restarted. Unless the unit is shut down, the water pump will keep running.

Heating mode:

Dual system

When the system is started, the water pump operates immediately. Two minutes later, the water pump continues to operate. If the water return temperature is lower than 39 ℃, No.1 compressor will be started. One minute later, if the water return temperature is lower than 37 ℃, No.2 compressor will be started. If the heating requirement is reached, the water return temperature will be increased to 41 ℃, and No.1 compressor will be stopped. If the water return temperature is continuously increased to 42 ℃, No.2 compressor will be stopped. Then, the load is changed, the water return temperature is reduced to 39 ℃, and No.2 compressor runs. If the water return temperature is reduced to 37 ℃, No.1 compressor will be started. Unless the unit is shut down, the water pump will keep running.

Single system

The operation of water pump, fan and compressor for the single-unit system is the same as the above dual-unit system. The only difference is that the compressor will be started if the water return temperature of the single-unit system is lower than 37 ℃ and will be stopped if the water return temperature is higher than 42 ℃.

Table 2. Operation Range of Ambient Temperature

Cooling mode 18℃ ~ 43

℃

Heating mode -10℃ ~ 21

℃

Unit Operation (H Type)

Temperature sensor (TH2)

The temperature sensor (TH2) senses the water outlet temperature of the system as the basis for compressor start or stop in the cooling and heating modes.

Cooling mode:

Dual system

When the system is started, the water pump operates immediately. Two minutes later, the water pump continues to operate. If the water outlet temperature is higher than or equal to 8 ℃, one compressor will be allowed to be started; if the water outlet temperature is higher than or equal to 9 ℃, two compressors will be allowed to be started; if the water outlet temperature is higher than or equal to 10 ℃, three compressors will be allowed to be started; if the water outlet temperature is higher than or equal to 11 ℃, four compressors will be allowed to be started. Unless the unit is shut down, the water pump will keep running.

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Unit Operation

When the system is unloaded, if the water outlet temperature is lower than or equal to 6 ℃, one compressor will be shut down; if the water outlet temperature is lower than or equal to 5.5 ℃, two compressors will be shut down; if the water outlet temperature is lower than or equal to 5 ℃, three compressors will be shut down; if the water outlet temperature is lower than or equal to 4.5

℃

, four compressors will be shut down.

Single system

When the system is unloaded in the Heating mode, if the water outlet temperature is lower than or equal to 6 ℃, one compressor will be shut down; if the water outlet temperature is lower than or equal to 5.5 ℃, two compressors will be shut down.

Heating mode:

Dual system

When the system is started, the water pump operates immediately. Two minutes later, the water pump continues to operate. If the water outlet temperature is lower than or equal to 44 ℃, one compressor will be allowed to be started; if the water outlet temperature is lower than or equal to 43 ℃, two compressors will be allowed to be started; if the water outlet temperature is lower than or equal to 42 ℃, three compressors will be allowed to be started; if the water outlet temperature is lower than or equal to 41 ℃, four compressors will be allowed to be started. Unless the unit is shut down, the water pump will keep running.

When the system is unloaded, if the water outlet temperature is higher than or equal to 46 ℃, one compressor will be shut down; if the water outlet temperature is higher than or equal to 46.5

℃

, two compressors will be shut down; if the water outlet temperature is higher than or equal to 47 ℃, three compressors will be shut down; if the water outlet temperature is higher than or equal to 47.5 ℃, four compressors will be shut down.

Single system

When the system is unloaded in the Heating mode, if the water outlet temperature is higher than or equal to 46 ℃, one compressor will be shut down; if the water outlet temperature is higher than or equal to 46.5 ℃, two compressors will be shut down.

Table 3. Operation Range of Ambient Temperature

Cooling mode 15℃ ~ 48

℃

Heating mode -15℃ ~ 25

℃

Page 35

Module Control System

System Introduction

The module control system is a highly intelligent centralized control system. It can manage the loading and unloading controls of multiple outdoor unit modules, the centralized control of multiple outdoor units is mainly performed by the Centralized Controller, and one Centralized Controller can control 25 units at most.

Centralized

controller

Up to 25pcs

RS458 communication wire

Centralized Controller

The centralized controller is the core of the whole system. It can be used for single-unit and group operations (including startup & shutdown, temperature setting, mode change, etc.), comfort timing control, network monitoring alarm, etc. The configuration of 50*100mm large LCD screen and 15 keys provides a clear operation interface bringing convenience to the users.

The casing of the centralized controller is provided with a flip cover, the common keys such as ‘OK’, ‘ ∧’ and ‘∨’ are exposed on the surface for normal operation. The more detailed operation can be finished through the keys under the flip cover. The simple and easy operation instructions are printed under the flip cover.

The centralized controller needs a 220VAC/12VDC, 500mA DC power supply. The dimensions are 122*162*19.2mm (W*H*T), and the centralized controller can be installed

through the standard 86 type junction box.

Display, keys and installation of centralized controller

LCD display interface



SET

Outdoor

S36

S30

S38

S35

S33

S34

S42

S39



S40

S41



2))

CO2

S25

S29

S31

S32

S28

S26

S27

OFF

:((.

S23

S22

S24

Group

NO.

S20

S21

S11

S44

S45

S2 S3

S6 S7

S10

S46

S47

S48

S13

S12

S14S15

S16

S17

S19

S18

S37

S43

Page 36

Module Control System

Description:

S1 ……… Keyboard lock; if this icon is displayed, the keyboard will be locked; S2-S5 …… icon for compressors 1-4 Running; S6-S9 …… icon for compressors 1-4 Defrosting ; S10-S11 … icon for electrical heaters 1-2 Running; S12 ……… Antifreezing icon; S13 ……… Water pump Running icon; S14 ……… Meters icon; S15 ……… Boiler icon; S16 ……… Expressing the telephone interface board or communication problem; S17 ……… Expressing the relevant operations of the light interface board; S18 ……… Unit number icon flashing when binding. If this icon is displayed, the number displayed at S37 is unit

number; S19 ……… Group operation indication; S20 ……… Expressing system running. In general, it indicates the running of unit with minimum unit number; S21 ……… Expressing system stopped. In general, it indicates stopped of unit with minimum unit number; S22 ……… Filter screen. In the comfort control mode, it indicates enabled or disabled of comfort control; S23 ……… Fresh air; S24 ……… Much air dust; S25 ……… Swing; S26 ……… High carbon dioxide content; S27 ……… Sleep; S28 ……… Day of Week; S29 ……… Timing On icon; S30 ……… Time displaying the time of clock and timing; S31 ……… Timing Off icon; S32 ……… Timing setting icon. If timing is set and this icon is displayed, timing will be valid; in general, if this icon is

displayed, timing has been set. S33 ……… Fahrenheit degree; S34 ……… Centigrade degree; S35 ……… Percent for expressing the humidity or the loading rate of the compressor, etc.; S36 ……… Displaying temperature, humidity, fault code and other values; S37 ……… Expressing the total quantity of units, the unit number, etc.; S38 ……… Displaying the outdoor unit or external ambient temperature, etc.; S39 ……… Displaying the setting temperature; S40 ……… Displaying the humidity; S41 ……… Alarm; S42 ……… Expressing the room temperature (water temperature); S43 ……… Fan icon. The peripheral circle expresses automatic fan speed, one leaf expresses low fan speed, two

leaves express middle fan speed, and three leaves express high fan speed;

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Module Control System

S44-S48 … Respectively expressing cooling, dehumidification, heating, ventilating and automatic modes;

Keys

Description:

∧

……… After the centralized controller selects the single-unit operation mode, press this

key to set the temperature. The temperature will rise by 1 degree. See the following description for other functions.

∨

……… After the centralized controller selects the single-unit operation mode, press this key

to set the temperature. The temperature will drop by 1 degree. See the following description for other functions.

OK ……… Confirmation of operation. Press this key to perform the group startup & shutdown

operation.

SetTime Time setting key.

①

……… Browse key. Rapidly inquire the network unit condition. This key can be also used as

a number key.

②

……… Mode key. After the centralized controller selects the single-unit operation mode,

press this key to change the mode. When setting the time, press this key to change the month setting. This key can be also used as a number key.

③

……… Week key. After the centralized controller selects the single-unit operation mode,

press this key to set the sleep mode. When adjusting the time (or setting the week timing), press this key to change the week setting. This key can be also used as a number key.

④

……… Single Unit key. This key is used for the centralized controller to select the single-unit

operation mode. This key can be also used as a number key.

⑤

……… Fan key. After the centralized controller selects the single-unit operation mode, press

this key to change the fan speed. When setting the time, press this key to change the date. This key can be also used as a number key.

⑥

……… Hour key. When adjusting the time (or setting the week timing), press this key to

adjust the hour. This key can be also used as a number key.

⑦

……… Connect key. This key is used for the network binding of units. This key can be also

used as a number key.

⑧

……… Backlight key. This key is used for backlighting the centralized controller. This key can

be also used as a number key.

⑨

……… Minute key. After the centralized controller selects the single-unit operation mode,

Page 38

Module Control System

this key is used for fault resetting; When adjusting the time (or setting the week timing), press this key to adjust the minute. This key can be also used as a number key.

○

……… Timing key. This key is used for the timing setting of comfort function. It can be also

used as a number key.

……… Group key. This key is used for group operation control.

……… Exit key. This key is used for the last key function exiting. Long press this key to lock

the keyboard.

See the common key operation instructions under the flip cover of the casing for the centralized controller.

Key Description

•

Unit network binding: key

⑦

•

Rapid inquiry of connected units: key ①.

•

Time adjustment: month: key ②; day of week: key ③; date: key ⑤; hour: key ⑥; minute: key ⑨.

•

Single-unit operation: temperature setting: keys ④ and ; mode: key ②; sleep: key ③; fan speed: key ⑤; alarm reset: key ⑨.

•

Group operation: mode: keys and ②; startup & shutdown: key ; temperature setting: key .

Hotline:8008208676/4008201363

Installation of Centralized Controller

There are four mounting holes at the back of the centralized controller, so that it can be conveniently connected with the standard 86 type junction box.

There is a four-pin connecting terminal on the circuit board at the back of the centralized controller. They are RS485 signal B, RS485 signal A, DC power supply ground wire and DC power supply positive wire from the back of the board. The DC power supply and the communication cable are connected through this terminal.

The centralized controller is provided with a 220VAC/12VDC, 500mA DC power supply.

Connecting

terminal

Page 39

Module Control System

Wiring Diagram of Centralized Controller

TRANE ADC_OT03 VER1.00

CN2

SW2

C15

R26

+9~12V

GND

RUN-IN

CN5

PUMP

+VBA

gnd

TH1

CN2

CN6

TH4TH2

TH3

SW2

TH5

TH6

CN1

NEGETIVE

LINE

COMP1

SW1

HT/EV1

COMP2

4WV1

A-HAT

4WV2

LINE

NEGETIVE

OV-PUMP

CN5

CN4

OV-COMP2

HP1

LP1

OV-COMP1

OV-FAN

M/FAN2

H/FAN1

RUN-IN

AL-OUT

AL-IN

RUN-OUT

ADC_OD_CO1

FLOW

OVHT/HP2

FREZ/LP2

C/H

N-COM

EN-SAVE

TH4

CN6

CN2

TH2

TH1

TH3

SW2

CN4

TH5

TH6

4WV1

CN1

SW1

COMP1

COMP2

HT/EV1

A-HAT

4WV2

PUMP

H/FAN1

M/FAN2

TH1

LP1

HP1

OV-COMP2

OV-FAN

OV-COMP1

CN2

CN6

FLOW

OV-PUMP

C/H

FREZ/LP2

OVHT/HP2

ADC_OD_CO1

AL-OUT

RUN-OUT

AL-IN

EN-SAVE

N-COM

CN1

NEGETIVE

LINE

COMP1

TH3

TH2TH4

SW2

TH5

TH6

CN4

CN5

SW1

HT/EV1

COMP2

4WV1

PUMP

4WV2

A-HAT

M/FAN2

H/FAN1

RUN-IN

AL-IN

RUN-OUT

AL-OUT

ADC_OD_CO1

LP1

HP1

OV-COMP1

OV-FAN

OV-COMP2

OV-PUMP

FLOW

OVHT/HP2

FREZ/LP2

C/H

N-COM

EN-SAVE

Centralized Controller

MODULE

POWER

SHIELD LAYER

SHIELD LAYERSHIELD LAYER

Groundin

MODULE MODULE

Description of ground terminal for RS485 control wire

•

Forbid to be connected to the high voltage 220V ground wire terminal of the iron sheet for the electric control box.

•

RS485 ground port G is the ground terminal of the DC power supply for the electric control panel.

Installation requirements of RS485 communication cable

1. Requirements of communication line: RS485 wiring must be AWG 18-22, the line diameter must be larger than 0.75 mm2, the twisted pair shall be provided with the shielding layer, and the twist distance shall not be more than 5 cm. It is recommended to use BELDEN, 5320FE.

2. Requirements of hand by hand wiring: each system module is provided with two terminals A and B for RS485 connection, and the module of the outdoor unit is provided with the terminal G besides the terminals A and B for connecting the shielding layer of the communication line. The shielded twisted pair must be wired hand by hand without star connection, i.e. 1 is connected to 2, 2 is connected to 3, and 3 is connected to 4, which is correct; if 1 is connected 2, 2 is connected to 3, and 2 is connected to 4, it will be wrong.

3. Wiring requirements of shielding layer: after being twisted, the shielding layer is covered with the adhesive tape to prevent from being connected with 220V ground wire, and one end of the shielding layer is connected with the earth point G of the outdoor unit control cabinet. When the module of the outdoor unit is connected, the shielding layer is connected to the terminal G. Forbid to be connected to 220V ground wire terminal of the iron sheet for the electric control box.

4. When the network is unstable, install the terminator (shipped with the Centralized Controller) to the communication ports A and B of the last unit of the network.

Function of centralized controller

Introduction

Single-unit operation: the centralized controller can operate any single unit on the network, for example, start up and shut down, change the mode, change the set temperature and so on.

Multi-unit operation: the centralized controller can start up and shut down all connected units on

Page 40

Module Control System

the network, and adjust the mode and the temperature; Timing operation (comfort control): the centralized controller can respectively set the

temperature values at different times of each day to meet the needs of comfort level according to the working days and the holidays within one week.

Network monitoring: the centralized controller can monitor all units on the network. When a unit is offline, the centralized controller immediately instructs the offline unit number and gives an alarm; when one or more units fail, the centralized controller immediately displays the fault code and gives an alarm; the centralized controller can directly shut down all faulty units on the network.

System control: when the centralized controller and the indoor and outdoor units form a small water system and one or more indoor units are started, the network system will automatically start up the outdoor units; when all indoor units are shut down, the network system will automatically shut down the outdoor units.

Remote control: the startup and shutdown, the set temperature adjustment, the mode adjustment, etc. of each unit can be performed by phone.

Definition of Switch Functions

OFF ON

SW1-1 Indoor unit and outdoor unit

interlocked control

Indoor unit and outdoor unit not

interlocked control SW1-2 Reserved SW1-3 Total number of units is displayed Loop browsing is displayed SW1-4 It is inactive as the thermostat of indoor

unit

It is active as the thermostat of indoor

unit SW1-5 Commercial mode Residential mode SW1-6 HEAT locking is inactive HEAT locking is active SW1-7 Reserved SW1-8 Backlit is turned on by any button Backlit is turned on by Button

⑧

Note: this unit requires:

SW1-1 must be set to “ON” position; SW1-2 must be set to “OFF” position; SW1-5 must be set to “ON” position; SW1-6 must be set to “OFF” position.

Operation of centralized controller

Network binding

In case the controller is not connected with the network: After being powered on, the centralized controller is not connected with any control panel and

the displays time and room temperature (water temperature) at this time; the square brackets will be displayed at the number position of the air conditioning unit and will be displayed in a mobile way, indicating that the centralized controller is searching for the control panel connected to the network cable, as shown in the figure below:

Page 41

Module Control System

:((.

NO.

Flash display

In case the controller is connected with the network but there is any key operation: After the control panel is connected to the network, firstly search for the control panel. In the

searching process, the square brackets will be still displayed at the number position of the air conditioning unit and will be displayed in a mobile way. After searching is ended, the quantity of control panels will be displayed at the number position of the air conditioning unit. The mode of No.0 unit will be displayed at the mode position. If more than one connected units are started up, there will be a startup indication “ON”; if all connected units are shut down, there will be a shutdown indication “OFF”, as shown in the figure below:

Quantity of connected units

All units on the

network are shut down

If the key ⑦ (Connect) is pressed for more than 1 second, the centralized controller will search for the unit again, the results in the above figure will be displayed.

Fast Query

When the key ① (Browse) for more than 1 second, the display screen will display the operating state of the unit with the minimum number. Then automatically increase the unit number (the automatically increased speed can be adjusted) to continue to browse downward. When the key “∨” is pressed, the increase of unit number will be stopped; when the key “∨” is pressed, the unit number will be increased; when the unit number stops increasing, and the key “∧” is pressed, the unit number will be reduced by 1 to reversely display other units. If the key Exit is pressed, quit browsing. See the following figure:

SET



OFF

:((.

NO.

Online Unit number

Page 42

Module Control System

Single-unit operation

If the key ④ (Single Unit) is pressed, 00 will be displayed at the number position of the air conditioning unit and flash. At this time, press the number key to input the number of unit to be controlled, and then press OK. If this air conditioning unit exists on the network, the number of air conditioning unit stops flashing, which indicates that this indoor unit is selected for control.

The display screen will display all information of this unit, including mode, air speed, set temperature, etc.

Then press the keys “OK”, “∨”, “∧”, “2”, “5”, “8”, “3” and “9” corresponding to “startup & shutdown”, “temperature drop”, “temperature rise”, “mode”, “air speed”, “electrical heating”, “sleep”, “fault resetting”, etc.

If the key “∧” is pressed when the number of air conditioning unit flashes, A0 will be displayed at the number position of the air conditioning unit. Then “∨” and “∧” can be pressed, and the unit number will vary from A0 to BF. At this time, the key OK is pressed, and it indicates that the selected unit number is the number of outdoor unit. And then the outdoor unit can be operated. (Notes: if the address switch of the outdoor unit is 0, A0 will be displayed on the centralized controller; if the address switch of the outdoor unit is 1, A1 ill be displayed on the centralized controller. The display mode is hexadecimal. 32 outdoor units can be connected from A0 to BF.) For the outdoor units, startup & shutdown and mode change can be performed.

At this time, if the key Exit is pressed, the single-unit operation will be quit. The key ④ (Single Unit) can be also pressed to select other unit to operate.

Time Adjustment

When the key SetTime is pressed for more than 1 second, the time display part will flash. Then press ③ (Week), ⑥ (Hour) and ⑨ (Minute) to respectively adjust week, hour and minute.

If ③ (Week), ⑥ (Hour) and ⑨ (Minute) are long pressed, week, hour and minute will rapidly change.

Press ② (Month) to adjust the month, and press ⑤ (Date) to adjust the date. After adjustment, press SetTime to change the clock and quit the time adjustment. If SetTime is

not pressed but Exit is pressed, the clock will not change.

SET

:((.

Month

Date

Hour

Week

Minute

Note: after the centralized controller is initially installed or the battery is replaced, it is

necessary to adjust the clock, otherwise the clock will not work.

Fault Display

Offline dis play

Under normal circumstances, the quantity of units is displayed at the unit number position, and “NO.” is not displayed. If there is an offline unit, “NO.” will be displayed, and the number of offline unit will be displayed at the unit number position and flash, and the phone icon will

Page 43

Module Control System

be simultaneously displayed. If there are many offline units, the unit numbers will be display in turn.

Flash

Unit fault display

If the unit on the network is faulty, the number of unit which is faulty on the network will be displayed at the unit number position, the alarm symbol and the fault code will be displayed in the temperature display area, as shown in the following figure. If there are many faulty units, the unit numbers will be displayed in turn, and the alarm sound will be made. At this time, the key Exit can be pressed to cancel the alarm sound, or the key OK can be pressed to shut down the faulty units. Press ⑨ to sent the fault resetting signal to the faulty unit.

Refer to “Fault Alarm” for the specific meaning of the fault code.

Modify the parameters of the outdoor unit through the centralized controller

Firstly select an outdoor unit (to enter the single-unit operation mode); Then press (Group) for 3 seconds, and then the lock symbol will be displayed at the top left

corner and flash; at this time, the unit number part will also flash; Then enter the password 66 through the number key; then press OK to enter the parameter

adjustment mode. At this point, the parameter code will be displayed at the time display part, and the parameter

value will be displayed at the temperature display part. Then press “∨” and “∧” to respectively modify the parameters. After modification, press OK to confirm modification and modify the next parameter. If the parameter is not expected to be modified, press “0” to modify the next parameter.

Note 1: if there is no parameter to be modified for the outdoor unit, press OK to quit the parameter modification mode.

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Module Control System

Note 2: if the parameters is temperature parameter, the unit “C” or “F” will be displayed; if the parameters are time or other parameters, the units will not be displayed;

Note 3: the decimal part of the parameter will not be displayed.

“66” Password Setting Code Set value 016 Set cooling temperature 017 Set heating temperature 022 Antifreezing temperature in winter 001 Defrosting time interval 002 Minimum defrosting time

The method for modifying the factory set value and the bit function switch is similar with this method. The difference is that the password and the parameter code are different.

Set the centralized controller to display the set temperature or the room temperature (water temperature)

Press “∨” for 3 seconds to enter the password mode. The lock symbol will be displayed at the upper left corner, and the unit number part will flash. Enter two-bit password (00 by default), and press OK. The lock symbol and the unit number will flash at the same time to enter the adjustment interface.

At this time, press “∨” to switch to display the set temperature or room temperature. If the unit on the network does not support the room temperature, the set temperature will be displayed.

When the room temperature is displayed, the icon will occur; when the set temperature is displayed, the icon will occur.

NOTE:

If has indoor units, the centralized controller will display room temperature, if no indoor units, only has outdoor units, the centralized controller will display water temperature (return or leaving water temperature which by different control).

Lock the keyboard

If Exit is pressed for more than 6 seconds, the lock icon will be displayed at the upper left corner of the display screen;

At this time, the keyboard is locked. If Exit is pressed for more than 6 seconds again, the keyboard will be unlocked.

During the keyboard locking period, the operation of any key will not be performed.

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Module Control System

Forbid to operate by the remote telephone. If the remote telephone operation is valid, the centralized controller will display the phone icon (as

shown in the figure below). At this time, press ⑨ for 3 seconds to cancel the remote telephone operation. The phone icon of centralized controller will disappear. If ⑨ is pressed for 3 seconds again, the remote telephone operation will be valid.

Switching of backlight function

If SW1-8 is ON, any key can be pressed to start the backlight for 30 seconds; SW1-8 is OFF, only

⑧

(Backlight) can be pressed to start the backlight.

Used as an indoor unit temperature controller

The centralized controller can be used as a temperature controller. If SW1-4 is ON, the centralized controller will display the status of indoor unit with the minimum number in normal state, and can be used as an indoor unit temperature controller for direct operation.

If (Group) is pressed, the normal mode of the centralized controller will be entered. At this time, various routine operations can be performed. If Exit is pressed, return to the temperature controller operation of the single indoor unit.

Module Control

The single-unit cascade system is a system which can realize the centralized control function by connecting multiple single units through the network cable. The centralized controller can operate any cascaded single unit and can operate all cascaded single units by group. The functions of any cascaded single unit are the same and independent of each other.

The module control system is a system which can realize the centralized control function by connecting one host unit and multiple slave units through the network cable. The module control system shares a water system, the host unit undertakes the operation of the system pump, all slave units share this water system, and the system automatically adjusts the energy balance, controls the time-sharing startup of the units, automatically loads and unloads the energy and realizes the average wear among the units.

Control Requirements

No.0 unit is the host unit, and other units are slave units. All units share a waterway system. For N Type unit, all slave units on the network are subject to the water inlet temperature of No.0

unit;

Page 46

Module Control System

For H Type unit, all slave units on the network are subject to the water outlet temperature of No.0 unit.

The host unit is provided with the system pump and the basic input and output. The host unit is connected with the water pump and detects the water flow switch; the slave

units are not connected with the water pump but still connected with the water flow switch for detecting the water flow switch. If the water flow switch of a slave unit issues an alarm, this slave unit will be automatically turned off.

The slave units are not provided with the pump and the interlocking two-way valve, is only provided with the basic input and output.

If the water pump of the host unit issues an alarm, all units will be shut down. The slave units have no water pump alarm function.

The slave units are subject to the water outlet temperature of the host unit. After receiving the all-unit start command, the units will be started up by delaying for 60s+unit

number*16s. After receiving the all-unit shutdown command, the units on the network will be shut down

according to unit number*8s, but the host unit will not execute this shutdown command and only accept the single-unit shutdown command.

Do not start up any host unit or slave unit or switch the mode by using the single unit controller; it can view and set the parameters of the unit only.

System Operation

System startup: the centralized controller executes the group startup operation. System shutdown: the centralized controller executes the group shutdown operation. The mode operation can be switched only in the group operation.

Implementation Method

Grouping of outdoor units

1) The outdoor units are grouped by unit number.

Group 1 No.0 unit No5. unit No10. unit No.15 unit No.20 unit Group 2 No.1 unit No.6 unit No.11 unit No.16 unit No.21 unit Group 3 No.2 unit No.7 unit No.12 unit No.17 unit No.22 unit Group 4 No.3 unit No.8 unit No.13 unit No.18 unit No.23 unit Group 5 No.4 unit No.9 unit No.14 unit No.19 unit No.24 unit

Notes: installation instructions: if the quantity of outdoor units is 6, the numbers shall be 0, 1, 2, 5, 6 and 7, which are grouped into 3 groups; if the quantity of outdoor units is 4, the numbers shall be 0, 1, 2 and 3, which are grouped into 4 groups, namely, the numbers shall be arranged by matrix as soon as possible.

2) The uploading and downloading conditions are classified into 5 conditions.

Page 47

Module Control System

Condition 1 Determine on the basis of the set temperature. Condition 2 Determine on the basis of increasing the set temperature by 0.5 degree

(refrigeration).

Condition 3 Determine on the basis of increasing the set temperature by 1.0 degree

(refrigeration).

Condition 4 Determine on the basis of increasing the set temperature by 1.5 degrees

(refrigeration).

Condition 5 Determine on the basis of increasing the set temperature by 2.0 degrees

(refrigeration).

Note: the heating conditions are opposite.

3) The uploading and downloading conditions of each group are sent by the centralized controller:

The addition of parameter 0 following the condition change command expresses that the group 1 corresponds to the condition 1, ……, and the group 5 corresponds to the condition 5;

The addition of parameter 1 following the condition change command expresses that the group 1 corresponds to the condition 2, ……, and the group 5 corresponds to the condition 1;

The addition of parameter 2 following the condition change command expresses that the group 1 corresponds to the condition 3, ……, and the group 5 corresponds to the condition 2;

The parameter of condition change command is 0-4. Note: if the sum of modular host unit and slave units is less than 5, the parameter of condition

change command is 0-(the sum of modular host unit and slave units minus 1). If the unit is not shut down, the centralized controller will send the change conditions every 24

hours. If the outdoor unit is started up each time, the centralized controller will send a change condition

command.

Handling of outdoor unit faults

If the slave units receive the water pump and water flow switch fault command of the host unit, the slave units will be shut down; the slave units will display the host system faults.

If other devices of the host unit are faulty and the water pump is not faulty, the water pump can not be shut down.

The faults of the slave units shall be correspondingly handled as the case may be.

Page 48

Building Control System

Mini-ICS system is a highly intelligent centralized control system developed by Trane for Unitary (small and medium sized) units. Mini-ICS system can manage the linkage control of multiple indoor units and outdoor units, the loading and unloading control of multiple indoor unit modules, the centralized control of multiple outdoor units as well as the centralized control of multiple indoor units; if Mini-ICS system is connected with Modbus communication module, the monitoring of local computer and the remote control of Internet can be realized, i.e. remote setting of room temperature, operation mode, startup and shutdown as well as fault alarm.

The system can be classified into a single-master controller system and a multi-master controller system. Wherein, the single-master controller system is suitable for the air conditioning comfort control of multiple rooms for a single family; the multi-master controller system is suitable for the control of multiple units for the small commercial system. This centralized control system is composed of a centralized controller, a Modbus communication module, a concentrator, units, etc. It can perform the remote centralized control of whole air conditioning system, and provide the necessary data for BA system to ensure that it is connected to the building automatic control system.

Modbus module (optional) -- connecting with the third-party BA system

Modbus module is a professionally designed protocol conversion device and interface, through which the multi-master controller system is connected. One Modbus module corresponds to one centralized controller. This module can convert Trane internal communication protocol into an open Modbus communication protocol for the use of the third-party system.

Modbus modules are usually used for the multi-master controller system. The module uplink and downlink adopt RS485 network interface. Each module corresponds to one centralized controller. See the following figure for the details of the system connection diagram:

Page 49

Control of electrical heater (installed by the user as required)

In the heating mode of the unit, when the water return temperature is lower than the set value 5

℃

( for the single-compressor unit) or the water return temperature is lower than or equal to the set value 6 ℃ (for the double-compressor unit), start the electrical heater; when the water return temperature is higher than or equal to the set value minus 2 ℃, turn off the electrical heater.

See Operation Manual for CXAJ Series Modbus Module for the specific wiring and operation of Modbus module.

Modbus module

Centralized

controller

Centraliz

controller

Centraliz

controller

Host computer

RS458 communication wire (Modbus)

Up to

15 Modbus modules

Modbus module

Up to 25pcs

RS458 communication wire

Up to 25pcs

RS458 communication wire

Up to 25pcs

RS458 communication wire

Building Control System

Page 50

Troubleshooting

Fault Alarm Table for Controller (N Type)

If the single unit controller and the control panel are faulty, the code “EE” will be displayed.

13 fault input alarm switches and 1 fault output alarm switch are arranged for the single-compressor system.

No. Input Port Fault Description Type Code Fault Handling

1 TH1

Short circuit / open circuit of water

inlet temperature sensor

A SE Turn off all external devices

2 TH2

Short circuit / open circuit of water

outlet temperature sensor

A SL Turn off all external devices

3 TH3

Short circuit / open circuit of suction

temperature sensor 1

A Sd Turn off all external devices

4 TH4

Short circuit / open circuit of

defrosting temperature sensing

sensor

A S1 Turn off all external devices

5 OVHT/HP2 Overload of electrical heater B H2 Turn off all external devices 6 FLOW Lack of water flow D FL Turn off all external devices 7 OV-PUMP Overload of water pump B OP Turn off all external devices 8 OV-FAN Overload of fan B OF Turn off all external devices

9 OV-COMP1 Overload of compressor 1 C C1

Only switch off the compressor

10 HP1 High pressure alarm of compressor 1 C H1

Only switch off the compressor

11 LP1 Low pressure alarm of compressor 1 C L1

Only switch off the compressor

12 / / /

Low refrigeration water outlet

temperature

D E3

Switch off the compressor. The

auxiliary heater for the water

pump operates.

13 / / / Low suction temperature D E4

Switch off the compressor. The

auxiliary heater for the water

pump operates.

Page 51

Troubleshooting

17 fault input alarm switches, 1 fault output alarm switch and 1 operating status output switch are arranged for the double-compressor system.

No. Input Port Fault Description Type Code Fault Handling

1 TH1

Short circuit / open circuit of water inlet

temperature sensor

A SE Turn off all external devices

2 TH2

Short circuit / open circuit of water

outlet temperature sensor

A SL Turn off all external devices

3 TH3

Short circuit / open circuit of suction

temperature sensor 1

A Sd Turn off all external devices

4 TH4

Short circuit / open circuit of defrosting

temperature sensing sensor 1

A S1 Turn off all external devices

5 TH5

Short circuit / open circuit of defrosting

temperature sensing sensor 2

A S2 Turn off all external devices

6 TH6

Short circuit / open circuit of suction

temperature sensor 2

A S3 Turn off all external devices

7 OVHT/HP2 High pressure alarm of compressor 2 E H2

Only switch off the compressor

2 8 FLOW Lack of water flow D FL Turn off all external devices 9 OV-PUMP Overload of water pump 1 B OP Turn off all external devices

10 OV-FAN Overload of fan B OF Turn off all external devices

11 OV-COMP1 Overload of compressor 1 C C1

Only switch off the compressor

12 OV-COMP2 Overload of compressor 2 E C2

Only switch off the compressor

13 HP1 High pressure voltage of compressor 1 C H1

Only switch off the compressor

14 LP1 Low pressure voltage of compressor 1 C L1

Only switch off the compressor

15 FREZ/LP2 Low pressure voltage of compressor 2 E L2

Only switch off the compressor

16 / / /

Low refrigeration water outlet

temperature

D E3

Switch off the compressor. The

auxiliary heater for the water

pump operates.

17 / / / Low suction temperature D E4

Switch off the compressor. The

auxiliary heater for the water

pump operates.

Page 52

Troubleshooting

Fault Alarm Table for Controller (H Type)

No. Input Port Fault Description

Code of

Single unit

controller

Code of

Centralized

Controller

Fault Handling

1 TH1

No.1 analog sensor fault (water inlet

temperature)

20 20 Switch off

2 TH2

No.2 analog sensor fault (water outlet

temperature)

21 21 Switch off

3 TH3

No.3 analog sensor fault (suction

temperature A)

22 22 Switch off

4 TH4 No.4 analog sensor fault (fin temperature A) 23 23 Switch off

5 TH5

No.5 analog sensor fault (coil heating outlet

temperature A-1)

24 24 Switch off

6 TH6

No.6 analog sensor fault (coil heating outlet

temperature A-2)

25 25 Switch off

7 TH7

No.7 analog sensor fault (ambient

temperature)

26 26 Switch off

8 TH8

No.8 analog sensor fault (suction

temperature B)

27 27 Switch off

9 TH9 No.9 analog sensor fault (fin temperature B) 28 28 Switch off

10 TH10

No.10 analog sensor fault (coil heating outlet

temperature B-1)

29 29 Switch off

11 TH11

No.11 analog sensor fault (coil heating outlet

temperature B-2)

2A 2A Switch off

12 TH12

No.12 analog sensor fault (total water outlet

temperature)

2B 2B Switch off

13 CN13

No.13 analog sensor fault (suction pressure

2C 2C Switch off

14 CN14

No.14 analog sensor fault (suction pressure

2D 2D Switch off

15 IND3 High-voltage switch trip of compressor 2 H2 65 Switch off

16 IND4 High-voltage switch trip of compressor 1 H1 64 Switch off 17 IND5 Water flow switch alarm FL 6D Switch off 18 IND6 Overload of water pump OP 6A Switch off 19 IND8 Overload of compressor 1 C1 68 Switch off 20 IND9 Overload of compressor 2 C2 69 Switch off

21 CN13 Low-voltage trip of compressor 1 L1 66 Switch off 22 CN14 Low-voltage trip of compressor 2 L2 67 Switch off

TH2 and TH1-TH2

Refrigeration antifreezing E3 8D

Switch off all compressors.

The water pump

continuously operates

24 TH3、TH8 Abnormal suction temperature E4 91

Switch off all compressors.

The water pump

continuously operates.

1 2

Page 53

Troubleshooting

25 CN13 Low pressure overrun 78 78

Switch off the compressor

of the system A. If this fault

occurs twice, switch off and

give an alarm.

26 CN14 Low pressure overrun 2 7A 7A

Switch off the compressor

of the system B. If this fault

occurs twice, switch off and

give an alarm.

27 TH4、TH9 Coil superheating 98 98 Switch off

28 TH7

The ambient temperature exceeds the

working range

87 87 Switch off

29 CN29

Communication fault between control panel

and centralized controller

ED None Switch off

30 CN4/XP1

Communication fault between single unit

controller and mainboard

EE None Switch off

Fault Code Table for Main Control Panel Note: the faults in this table are only displayed on the single unit controller and the centralized controller. Note 1: when this fault occurs, switch off all compressors. The water pump will continuously

operate. Lock “

antifreezing locking time of plate type heat exchanger for refrigeration

unit

”. the fault is permitted to be manually reset only when the water outlet

temperature or the suction temperature is recovered to the normal state,

Note 2: for CXAJ065/045 unit, there are no TH8, TH9, TH10, TH11, CN14, IND3 and IND9 inputs

and relevant alarm codes. Note 3: this alarm code will be displayed only when “module control” is selected. Note 4: this alarm code will be displayed only when “module control” is selected and it is a

modular host unit.

Page 54

Troubleshooting

Fault Analysis and Handling Method

The compressors cannot be started and make sounds

Possible Cause Handling Method

(1) The power supply is not connected

Inspect the following items: a. The main power switch is not turned on. b. The fuse is blown out.

(2) There is no refrigeration command

Inspect the following items: a. The humidity probe is damaged. b. The control wire is broken or improper. c. The fuse of the control power supply is blown out.

(3) The microcomputer has no compressor control signal output.

Inspect the following items: a. The high pressure is excessively high to cause the high pressure switch to trip. b. The high pressure switch is faulty. c. The refrigerant is insufficient to cause the low pressure switch to trip. d. The water valve is not opened to cause the flow switch or antifreezing switch to trip. e. The protective contact inside the fan trips. f. The microcomputer controller is defective.

(4) The electromagnetic switch of the compressor does not excite.

Inspect the following items: a. The compressor contact is poor. b. The wiring is poor. c. The low pressure switch is open-circuited.

(5) The protective contact inside the compressor trips.

Inspect the following items: a. Inspect the compressor current. b. Wait for the internal contact to reset (about 10-20 minutes)

(6) The ambient temperature exceeds the operating range.

Inspect the following items: Inspect whether the position of the ambient temperature probe is correct. If any, the unit will normally operate after the ambient temperature is within the operating range of the unit.

Page 55

Troubleshooting

The compressors make sounds but cannot be started

Possible Cause Handling Method

(1) The compressor voltage is too low.

Inspect the following items: a. Certain fuse is blown out. b. The supply voltage is too low. c. The electromagnetic contactor of the compressor is faulty. d. The wire connection is loose.

(2) The compressor is faulty.

Inspect the following items: a. The motor winding is open-circuited. b. The current of each phase is too high.

(3) The starting voltage is insufficient (for the single-phase unit).

Inspect the following items: a. The starting capacitor is poor. b. The starting relay is poor.

The second compressor cannot be started

Possible Cause Handling Method

(1) There is no refrigeration or heating signal.

Inspect the following items: a. The temperature switch is damaged. b. The control wire current is possible improper.

(2) The microcomputer has no compressor control signal output.

See the item (3) in Section A

(3) The electromagnetic switch of the compressor does not excite.

See the item (4) in Section A

The operating period of the compressor is too short

Possible Cause Handling Method

(1) Intermittent connection of control circuit

Inspect the following items: a. The contact of the contactor is poor. b. The wire connection is loose.

Page 56

Troubleshooting

The compressor operates without stop

Possible Cause Handling Method

(1) The unit energy cannot bear load (cannot reach the unloading water temperature).

Inspect the cause of excessive load

(2) The temperature probe or the control circuit is poor.

Replace the temperature probe. Replace or repair the control circuit.

(3) The electromagnetic contactor of the compressor is faulty.

Repair or replace the electromagnetic contactor.

(4) The valve block of the compressor leaks (the exhaust pressure is low, and the suction pressure is high).

Replace the compressor.

(5) The refrigerant is insufficient (the capacity gets small, the superheating capacity is too high, sub-cooling capacity is too low, and the low pressure is low).

Find out and repair the refrigerant leakage point, and recharge the refrigerant.

The compressor motor winding is open-circuited

Possible Cause Handling Method

(1) The evaporator load is too high (the water return temperature is high)

Inspect the following items: a. The water flow is too high. b. The water return temperature is too high.

(2) The motor cooling is not enough (the superheat is too high).

Inspect the following items: a. The expansion valve is improperly set. b. The expansion valve is faulty. c. The liquid pipe is blocked.

(3) The compressor voltage is improper.

Inspect the following items: a. The supply voltage is too low or unbalanced. b. The power wire is loose. c. The electromagnetic contactor of the compressor is poor.

(4) The parts inside the compressor is damaged.

Replace the compressor.

Page 57

Troubleshooting

The compressor noise is too high

Possible Cause Handling Method

(1) The parts inside the compressor are damaged or broken (the compressor makes a tap-tap). (2) Liquid backflow. (3) There is liquid refrigerant in the compressor when starting (the compressor housing is unusually cold).

Replace the compressor. Inspect and adjust the superheat. Inspect whether the refrigerant is charged excessively.

The refrigerating capacity is not enough

Possible Cause Handling Method

(1) The refrigerant is charged insufficiently (the superheating or subcooling capacity is not enough).

Supplement the refrigerant.

(2) The drying filter is blocked (the temperature from the refrigerant pipe to the dryer varies).

Replace the drying filter.

(3) The expansion valve is incorrectly adjusted. Readjust the expansion valve.

(4) The expansion valve is blocked (the superheat is too high and the water temperature is too high).

Repair or replace the expansion valve.

(5) The water flow of the evaporator is too low.

Inspect the filter screen, and adjust the water flow.

(6) There is noncondensing gas in the system.

Recharge the refrigerant after the system is vacuumized.

(7) The valve of the compressor leaks and the suction pressure is high (the high pressure is high, and the low pressure is low).

Replace the compressor.

The suction pressure is too low

Possible Cause Handling Method

(1) The refrigerant is charged insufficiently (the superheating capacity is high and the sub-cooling capacity is low).

Find out and repair the leakage point, and recharge the refrigerant.

(2) The temperature switch setting is too low (the low pressure is too low, and the water outlet temperature is too low).

Readjust the temperature switch.

(3) The chilled water flow is too low.

Inspect whether the filter screen is blocked and whether the balance valve is set correctly.

(4) The drying filter is blocked.

Inspect whether the drying filter is frosted. Replace it if necessary.

(5) The expansion valve is blocked (the superheating capacity is high). Clean or replace the expansion valve.

Page 58

Troubleshooting

The suction pressure is too high

Possible Cause Handling Method

(1) The cooling load is too high (i.e. the water supply temperature is high).

See the section E.

(2) The expansion valve excessively supplies liquid (i.e. the superheating capacity is too low, and the liquid overflows to the compressor).

Adjust the superheat setting, and inspect whether the temperature sensor is installed in the gas pipe.

(3) The suction valve is broken (i.e. the compressor noise is high). Replace the compressor.

The exhaust pressure is too low

Possible Cause Handling Method

(1) The refrigerant is charged insufficiently (i.e. the superheating capacity is high, the sub-cooling capacity is low, and there are bubbles in the window).

Find out and repair the leakage point, and recharge the refrigerant.

(2) The exhaust valve of the compressor is broken or leaks air. Replace the compressor.

(3) The low pressure switch is poor. Replace the poor control element.

(4) Operate below the minimum operating environment temperature.

Provide the proper exhaust pressure control or ambient temperature locking switch.

The exhaust pressure is too high

Possible Cause Handling Method

(1) The condensing air is too little or too hot, and the air flow is blocked.

Clear the coil, and inspect whether the fan and the motor are normal.

(2) There is air or noncondensing gas in the system (i.e. the condenser is unusually hot).

Recharge the refrigerant after the system is vacuumized.

(3) The refrigerant is charged excessively (the sub-cooling capacity is high, the superheating capacity is low, and the suction pressure is high).

Recycle the excessive refrigerant.

(4) The system load is excessively high. Reduce the load.

(5) The condensing fan or the fan pressure is poorly controlled (i.e. certain fan is faulty, and the condenser pressure is too high).

Repair or replace the switch.

The unit cannot run the heating function (limited to CXAJ)

Possible Cause Handling Method

(1) The control circuit is wrong or poor. Inspect the control circuit.

(2) The four-way valve is faulty. Replace the four-way valve.

Page 59

Troubleshooting

The low pressure is too low -- heating condition

Possible Cause Handling Method

(1) The refrigerant is insufficient. Charge the refrigerant.

(2) The air flow entering into the coil is too low or the air is too cold.

Clean the coil, and inspect whether the fan motor function is normal.

(3) The unit operates below the minimum operating environment temperature.

Install an ambient environment disconnecting switch.

(4) The expansion valve is disabled. Replace the expansion valve.

The high pressure is too high -- heating condition

Possible Cause Handling Method

(1) The water flow is too low.

Inspect whether the filter screen is blocked and whether the balance valve is set correctly.

(2) The heating switch is disabled.

a. Inspect whether the heating switch is placed at the correct temperature sensing position. b. Replace the heating switch.

Page 60

Shutdown

If the system is required to be shut down for a short time, just press the key “ON/OFF” on the control panel. If the system is required to be shut down for a long time, the main power supply shall be switched off. If there are no additional antifreezing protection measures (not this unit) taken on the water pipeline. The water shall be drained off through the drain valve on the water pipeline. Unscrew the water outlet in the water supply and return circuit, disassemble the unit side panel, and unscrew the water outlets at the bottom of the water pump and the shell and tube heat exchanger to ensure that the circulating water is drained off.

Startup after long-term shutdown

If the unit is started up again after long-term shutdown, the qualified professional shall finish the following items:

1. Execute various operations in “Annual Maintenance”.

2. Discharge air in the water circuit and fill with water.

3. Open the shutoff valve on the water circuit.

4. Inspect whether the refrigerant pipeline is loosened.

5. Start the host unit.

6. Inspect whether all components normally operate.

7. Make the system operate for 15-20 minutes in the full load condition, and inspect the oil level and various pressures.

8. Inspect the high and low pressures are normal.

The daily maintenance and service shall be performed by qualified professionals. In order to prolong the service life of the unit and reduce the possibility of failure, please regularly perform the necessary maintenance for the unit.

Please record the service behaviors of the unit weekly, and keep maintenance records. This makes for the unit fault diagnosis of the maintenance personnel.

Weekly maintenance contents

1. Inspect the compressor in the shutdown mode.

2. Inspect the host unit, for example, whether there is abnormal compressor noise, whether the distribution box is loosened, whether the pipeline leaks and abnormally vibrates, and so on.

3. Record the pressure, the temperature and other parameters as well as the maintenance time.

Annual maintenance:

1. Inspect the valve and the pipeline on the water circuit. If necessary, please clean the water filter, and analyze the water quality. If it is necessary to clean the water circuit, the professional shall assist in cleaning.

2. Clear the corroded surface and paint again, and inspect whether the door of the distribution box is airtight.

3. Inspect whether the water pipeline is tight, inspect the water pump and its relevant components, and check whether the antifreezing agent is enough. If necessary, charge the antifreezing agent.

4. Perform the items in the weekly maintenance.

5. Inspect the electromagnetic contactor.

6. Inspect whether the control device is set and acts correctly.

7. Inspect whether the refrigerant pipe is locked.

8. Inspect the insulation of the motor coil.

Maintenance

Page 61

Maintenance

Notes:

•

Prior to any contact, please be sure to switch off the main power supply, otherwise it may cause casualties and unit damage.

•

The maintenance and service work completed by the qualified professionals is very important and shall be performed annually or every 2000 operating hours.

Cleaning of condenser

Please use a brush or water column to clean the condenser. Flush the condenser with the water column from inside to outside. If the pipe bank is too dirty, please contact the professional cleaning personnel.

Note:

•

Do not clean the condenser with steam; otherwise, it will lead to the rise of internal pressure to cause the refrigerant to leak through the relief valve.

Cleaning of shell and tube heat exchanger

Trane recommends to clean the shell and tube heat exchanger by the chemical cleaning method. The cleaning agent shall be hot phosphoric acid solution, and its use conditions are as follows:

50-60 ℃, concentration of 15%, and cyclic cleaning for 3-6 hours.

Warning!

•

Do not clean the shell and tube heat exchanger with the toxic or corrosive cleaning fluid.

Unit

Three-way

valve

Shutoff

valve (off)

Shutoff

valve (off)

Water outlet

Water

inlet

Circulating

water pump

Agent container

Heating

Three-way

valve

Figure 3. Cleaning Diagram for Shell and Tube Heat Exchanger

Page 62

Trane optimizes the performances of the global civil housings and buildings. As a brand subordinated by Ingersoll Rand, the leader creating and maintaining the safe, comfortable and energy-saving environment in the world, Trane provides a complete set of advanced control and thermal energy air conditioning system, comprehensive building services and spare parts support. Please visit www.trane.com。

Trane constantly improves and innovates its products. The data in this document will be changed without prior notice.

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Trane CXAJ series, CXAJ045, CGAJ series, CGAJ045, CGAJ065 Installation, Operation And Maintenance Manual

Specifications and Main Features

Frequently Asked Questions

User Manual