Daikin JEHCCU-CL1, JEHCCU-CM1, JEHCCU-CM3, JEHSCU-CL3, JEHSCU-CM1 User manual

Reciprocating condensing unit

for medium temperature application

Scroll condensing unit

for medium temperature application

Series 1

Series 2

Installation Manual

Operation Manual

(Original Instruction)

JEHCCU0040CM1 JEHCCU0050CM1 JEHCCU0051CM1 JEHCCU0063CM1 JEHCCU0067CM1 JEHCCU0077CM1 JEHCCU0095CM1

Reciprocating condensing unit

for low temperature application

JEHCCU0100CM1 JEHCCU0113CM1

Series 2 JEHCCU0140CM1 JEHCCU0140CM3

Series 1

JEHCCU0115CL1

JEHSCU0200CM1 JEHSCU0200CM3 JEHSCU0250CM1 JEHSCU0250CM3 JEHSCU0300CM1 JEHSCU0300CM3 JEHSCU0350CM3

Series 3 JEHSCU0400CM3 JEHSCU0500CM3 JEHSCU0600CM3 JEHSCU0680CM3

Series 4 JEHSCU0800CM3 JEHSCU1000CM3

Scroll condensing unit

for low temperature application

Series 2

JEHSCU0200CL3 JEHSCU0300CL3

Series 3

JEHSCU0400CL3 JEHSCU0500CL3 JEHSCU0600CL3

Series 4

JEHSCU0750CL3

2

1.

Nomenclature

2

2.

Safety and Health

2

3.

Installation & commissioning

3

4.

Decommissioning & Disposal

6

5.

Checklist

6

6.

Service and Maintenance

7

7.

F gas Regulations

7

8.

Trouble Shooting

8

9.

Specifications

9

10.

Outline Drawings

11

11.

Electrical Data

14

12.

Appendix

20

Important Note

installed in accordance with all applicable codes,

mental capabilities, or lack of experience and

responsible for their safety. Children should be

J&E Hall REFRIGIRATION CONDENSING UNIT

TYPE OF COMPRESSOR CCU: RECIPROCATING SCU:

NOMINAL COOLING CAPACITY IN HP (DEVIDED BY 100)

POWER SUPPLY 1: 3: 400V/50Hz/3PH

APPLICATION M: MEDIUM TEMPERATURE L: LOW TEMPERATURE

GENERATION B: 2ND C: 3RD

1. Nomenclature

SCROLL

2. Safety and Health

General Information

Only a qualified refrigeration engineer who is familiar with refrigeration systems and components, including all controls should perform the installation and start-up of the system. To avoid potential injury, use care when working around coil surfaces or sharp edges of metal cabinets. All piping and electrical wiring should be

ordinances and local by-laws. This appliances is not intended for use by persons (including children) with reduced physical, sensory or

knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person

supervised to ensure that they do not play with the appliance.

O-CU06-DEC14-1 All specifications are subjected to change by the manufacturer without prior notice. The English text is the original instruction. Other languages are the translations of the original instructions.

230V/50Hz/1PH

• Ensure the unit received is the correct model for the intended application.

• Ensure refrigerant, voltage, are suitable for the proposed application and environment.

• Installation and maintenance are to be performed only by qualified personnel who are familiar with local codes and regulations, and experienced with this type of equipment.

• The condensing unit is delivered with a nitrogen holding charge.

• The condensing unit contains moving machinery and electrical power hazards. May cause severe injury or death. Disconnect and shut off power before installation or service of the equipment.

• Refrigerant release into the atmosphere is illegal. Proper evacuation, handling and leak testing procedures must be observed at all times.

• Condensing unit must be earthed. Improper earthing may result in electric shocks or fire.

• Be sure to switch off the unit before touching any electrical parts. Touching a live part may result in electric shocks or fire.

• The electrical covers and condenser fan guard must remain fitted at all times.

• Use of the condensing unit outside of design conditions and application for which units were intended may be unsafe and be detrimental to the unit, regardless short or long term operation.

• The condensing units are not designed to withstand loads or stresses from other equipment or personnel. Such extraneous loads or stress may cause failure/leak/injury.

• In some circumstances, a suction accumulator (not supplied) component may be required, it offers protection against refrigerant flood back during operation. It helps protect against off-cycle migration by adding internal free volume to the low side of the system.

• Test must be conducted to ensure the amount of off- cycle migration to the compressor does not exceed the compressor’s charge limit.

• Wherever possible the system should be installed to utilize a pump down configuration. For unit Series 1 JEHCCU040CM1 and JEHCCU0050CM1, it is advisable to connect with thermostat cut off configuration using the reserved terminal in control box.

• After installation, the system should be allowed to run for 3 – 4 hours. The oil level should be checked after 3 – 4 hours run time and topped up as necessary. The oil level should not be lower than quarter of the compressor oil sight glass.

3

Important Note

Wrong !

Correct !

Wrong !

Correct !

Air Discharge

Springs to

absorb vibrations

Otherwise, the compressor can fall from its 3 compressor housing spring, which results in noisy vibrations during operation and possible to breakdown.

3. Installation & Commissioning

3.1 Unit site location

• In order to achieve maximum cooling capacity, the installation location for condensing unit should be carefully selected.

• Install the condensing unit in such a way so that hot air distributed by the condensing unit cannot be drawn in again (as in the case of short circuit of hot discharge air). Allow sufficient space for maintenance around the unit.

• Ensure that there is no obstruction of air flow into or out of the unit. Remove obstacles which block air intake or discharge.

• The location must be well ventilated, so the unit can draw in and distribute plenty of air thus lowering the condensing temperature.

• To optimize the unit running conditions, the condenser coil must be cleaned at regular intervals.

3.2 Installation Clearance

• The installation location should allow sufficient space for air flow and maintenance around the unit.

Air inlet

• To allow sufficient space for doing service or installation.

3.3 Compressor handling

To ensure compressor reliability, the condensing unit and the compressor must not be tilt greater than an angle of 45°.

3.4 Field Piping

Line sizing should only be determined by qualified personnel. All local codes of practice must be observed in the installation of refrigerant piping

To ensure satisfactory operation and performance, the following points should be noted for field piping arrangements,

• Couples one indoor unit with one outdoor condensing unit only.

• Release all the pre-charged nitrogen before pipework connection.

• Connecting pipe size for suction and liquid line must same as attaches to the condensing unit. Correct line sizing will minimize the pressure drop and maintain sufficient gas velocity for proper oil return.

• Pipework routes must be as simple and as short as possible. Avoid low points on pipework where oil can accumulate.

• Use only clean, dehydrated refrigeration grade copper tube with large radius elbows. The piping shall be kept with enough bending radius.

• Braze without over filling to ensure there is no excess solder into the tube.

• To prevent oxidation, blow nitrogen through pipework when brazing.

• Install insulation on all suction lines after pressure test.

• Adequately support all pipe work at a maximum of 2

meter intervals.

• For the condition where the outdoor condensing unit is above the indoor unit, the height difference between units shall be less than 25 m and install oil trap on suction pipe every 4 m height. The suction pipe must always be fitted with U-trap at the bottom.

• For the condition where the outdoor condensing unit is below the indoor unit, the height difference between units shall be less than 4 m. Pipe trap shall be installed upward on outlet of indoor unit (suction pipe).

• The recommended piping length is 25 m or less.

• Additional oil might be required in case field piping is

long or with many oil traps. Check the oil level of the

O-CU06-DEC14-1 All specifications are subjected to change by the manufacturer without prior notice. The English text is the original instruction. Other languages are the translations of the original instructions.

4

Compressor

Pressure differential

AE/AJ

19 barg

(275 psig)

MTZ/ZB*KQE

30 barg

(435 psig)

Test pressure

High side

Low side

28 barg

(405 psig)

19 barg

(275 psig)

1. Low pressure (LP) setting

12. Switch

Model

AE/CAJ/TAJ

MTZ/ZB

Refrigerant

R404A/

R134a

R404A/

R407F

R134a

Cut Out (barg)

27.7

18

27.7

18

Cut Out (psig)

402

261

402

261

Model

AE/CAJ/TAJ

MTZ

ZB*KQE

Cut out (psig)

21.8

7.3

14.5

8.7

20.3

29

8.7

Compressor Model

Refrigerant R404A R134a R404A R134a R407C R404A R134a

Work ing Pressure

Ran ge High Side,

(barg)

13.2 - 27.7 6.7 - 15.8 13.2 - 27.7 7.9 - 22.6 12.5 - 29.4 7.14 - 27.6 6.6 - 22.6

Work ing Pressure

Ran ge Low Side,

(barg)

1.5 - 8.3 0.1 - 3.9 1.0 -7.2 0.6 - 4.7 1.4 - 6.6 1.98 - 7.14 0.6 - 3.8

Med Temp

MTZ

Med Temp

ZB*KQE

Med Temp

AE/CAJ/TAJ

Important Note

flare

Compressor

Med Temp

Refrigerant

R404A/R407A/

R134a

R404A

R134a

R407C

R404A/R407A/

R134a

Working

Side (barg)

Working

Side, (barg)

compressor to decide to add the oil after minimum 2 hours operation.

• It is recommended as well to install the MOP (Maximum Operation Pressure), expansion valve for medium evaporating temperature units, if the working suction pressure during start procedure especially after defrost cycle, is out of the limit, as refer to the table provided.

Recommend compressor working pressure range

Model

Pressure

Range High

Pressure

Range Low

AE/CAJ/TAJ

R407F

13.2 – 27.7

1.5 – 8.3

6.7 –

15.8

0.1 –

3.9

13.2 –

27.7

1.0 –

7.2

MTZ

R407F

7.9 –

12.5 –

22.6

0.6 –

4.7

29.4

1.4 –

6.6

7.14 – 27.6

1.98 – 7.14

ZB*KQE

Ensure that a good quality vacuum pump is used to pull a minimum vacu um of -0.1 barg (250 microns) or less. Ensure that no pressure increase during 1 hour or more after stop vacuuming. If pressure increase, there is moisture or leakage along the pipeline.

3.8 Safety pressure switch settings The pressure switch fitted to condensing units with auto reset for low pressure and manual reset for high pressure

6.6 –

22.6

0.6 –

3.8

are NOT

factory preset.

3.5 Pressure testing

• Make sure that both service valves are closed when running a pressure test on field piping, always use an inert, dry gas such as Nitrogen

• The pressure differential between the high and low side shall not higher than below.

• Test pressures shall be as shown follows.

• If there is pressure drop, check the leakage portion.

3.6 Leak detection

• Make sure that all manual valves are open

• Perform a leak test of the system using nitrogen mixed

with the refrigerant to be used

• Do not use CFC for leak testing the condensing unit which will be used with HFC refrigerants

• The use of leak testing fluids is not recommended as this may interact with the lubricants own additives

3.7 Vacuum - moisture removal

Moisture prevents proper functioning of the compressor and the refrigeration system

Air and moisture reduce service life and increase condensing pressure causing abnormally high discharge temperatures likely to destroy the oil’s lubricating properties. The risk of acid formation is also increased by air and moisture and copper plating can be generated in this way. All these phenomena can cause mechanical and electrical failure.

spindle

2. Differential setting spindle, LP

3. Main arm

5. High pressure (HP) setti ng spindle

7. Main spring

8. Differential spring

9. Bellows

10. LP connection

13. Terminals

14. Earth terminal

15. Cable entry

16. Tumbler

18. Locking plate

19. Arm

20. Manual reset button

11. HP connection

High pressure safety (Manual reset) The high pressure safety switch is required to protect the compressor from working out of its envelope. The high pressure switch shall set equal or lower than bel ow values depending on the type of refrigerant, application and the ambient condition.

R407A/

R407F

R404A/

Refrigerant

Application M* M* M* M* M* M* M* Cut out (barg) 1.5 0.5 1 0.6 1.4 2 0.6

R407A/

R134a R404A R134a R407C

R407F

R404A/ R407A/

R407F

R134a

O-CU06-DEC14-1 All specifications are subjected to change by the manufacturer without prior notice. The English text is the original instruction. Other languages are the translations of the original instructions.

5

O-CU06-DEC14-1 All specifications are subjected to change by the manufacturer without prior notice. The English text is the original instruction. Other languages are the translations of the original instructions.

6

Refrigerant

R404A/R407C/R407F/R407A

R134a

Series 2- 13 Series 4 -10

Refrigerant

R404A/R407A/R407C/R407F

Setting (bar)

JEHR model -19

JEHS model - 13

R404A/ R407F

Setting Cut in

Setting Differential

Important Note

intervals.

Low Pressure side range

djusting screw

Clockwise: Decrease cut in

pressure setting

Anticloc

kwise: Increase cut in

pressure setting

Differential adjusting screw Clockwise: Increase differential pressure setting Anticlockwise:Decrease differential pressure setting

Low pressure side connector

High pressure side connector

High Pressure side range adjusting screw Clockwise: Increase cut off pressure setting Anticlockwise: Decrease cut off pressure setting

Clockwise: Increase pressure set point Anticlockwise: Decrease pressure set point

360° = 1 turn Approx. 1.5 barg

MEDIUM TEMP MODEL REFRIG FAN SPEED (RPM)

REFRIGERANT : R134a FAN SPEED (RPM)

LOW TEMP MODEL REFRIGERANT: R404A, R407A FAN SPEED (RPM)

TEMPERATURE (C°)

Manual reset switch

Low pressure safety (Auto reset) The low pressure safety switch is recommended to avoid

compressor operation at too lower suction pressure and vacuum condition. The low pressure safety cut should never be set below value as shown in the following table.

* M: Medium temperature; L: Low temperature

Cut off: Fan motor stops when the pressure decreases below the value P

min

.

Note: F.V.S. = Full Voltage Set Point (pressure setting for maximum speed) E.P.B. = Effective Proportional Band (6 bar) P

= (F.V.S. – 6)

min

a

For Series 1 model: Recommended setting for Series 1 model which using pressure switch to on/off fan:

Refrigerant

R407A/

R134a

The low pressure cut off pressure is the setting of cut in minus the differential.

There must be no more than 10 compressor starts per hour. A higher number reduces the compressor. If necessary, use an anti-short-cycle timer in

the control circuit. Minimum a 2 m i nut e runtime after each

start of compressor and a 3 stop & start are down cycle may the compressor

3.9 Fan speed controller setting

The fan speed controller regulates t he speed of the condenser’s fan. It keeps the condensing pressure at a steady level by changing the speed of the fan according to the required condensing pressure.

For model in Series 2 and 4 : Recommended setting for range setting pointer/ range adjusting screw as table below:

Medium Temp

Setting (bar) 19

Low Temp

O-CU06-DEC14-1 All specifications are subjected to change by the manufacturer without prior notice. The English text is the original instruction. Other languages are the translations of the original instructions.

service life of the

minute idle time after each

recommended. Only during the pump

run for much shorter

(bar)

16 10

7 7

The low pressure cut off pressure is the setting of cut in minus the differential.

For model in Series 3, the fan speed controller setting as shown below.

ERANT: R404A, R407A, R407F

7

MAX 150°C

OPEN position

Eart wire (

Power supply wire

Clamp

Earth terminal

3.10 Commissioning of the Condensing Unit

Please make sure that all manual service valves are fully open when starting the system for the first time. This includes external and internal shut off valves as well as liquid receiver valve in the unit. The ball valve open position is shown as below:

• Check compressor oil level via compressor sight glass, the oil level should not be lower than quarter of sight glass.

• Check the TXV capacity sizing based on indoor unit capacity. Check TXV applicable refrigerant. Check position and condition of the sensing bulb fixing

• Observed the system pressures during the charging and initial operation process.

• Ensure that suction pressure will decrease, discharge pressure will increase. No abnormal noise from the compressor.

• Continue to charge the system until sight glass is clear. Make sure that high pressure is > 14 barg for R404A and > 8 barg for R134a when doing this charge adjustment operation. Continuous flow of clear refrigerant through the sight glass, with perhaps an occasional bubble at very high temperature indicates the refrigerant is at optimum.

• Check the compressor’s discharge and suction

3.11 Compressor electrical wiring

Verification of proper rotation direction is made by observing that suction pressure drops and discharge pressure rises when the compressor is energized. Reverse rotation of a scroll compressor also results in substantially reduced current draw. Suction temperature will be high, discharge temperature will be low and the compressor may generate abnormal noise.

3.12 Earthing of Condensing Unit

Installation of earth wire must be made to earthing screw (labelled with earth label) before connecting the live wires. The earth wire shall be slack as shown in below diagram.

pressure, to ensure it is within operating range. Discharge temperature should be within 50 to 90 °C and pressure should be around 15 to 26 barg (for system charged with R404A) and 8 to 16 barg (for system charged with R134a).

• Check the current of condensing unit and ensure it is below the motor circuit breaker setting value.

• Check condenser fan, ensure warm air blowing off the condenser coil.

• Check evaporator blower, ensure it’s discharging cool air.

• Check suction superheat and adjust expansion valve to prevent liquid flood back to the compressor. Recommended 5 to 20 K of suction superheat.

• Do not leave the system unattended until the system has reached its normal operating condition and the oil charge has properly adjusted itself to maintain the proper level in the sight glass.

• Check periodically the compressor performance and all the moving components during the first day of operation.

• Check the liquid line sight glass and expansion valve operation. If there is an indication that the system is low on refrigerant, thoroughly check the system for leaks before adding refrigerant.

Slack)

4. Decommissioning & Disposal

At the end of the unit’s useful life, a suitably qualified engineer should decommission it. The refrigerant and compressor oil are classed as hazardous waste and as such must be reclaimed and disposed of in the correct manner, including completion of waste transfer paperwork. The unit components must be disposed of or recycled as appropriate in the correct manner.

5. Checklist

• Ensure the high low pressure controls are configured properly.

• Ensure crankcase heater is energized minimum 12 hours prior to start up and permanently energized.

• Check the refrigerant is correct for intended use.

• Check all electrical connections.

• Check all electrical termination and circuits are correct.

O-CU06-DEC14-1 All specifications are subjected to change by the manufacturer without prior notice. The English text is the original instruction. Other languages are the translations of the original instructions.

Daikin JEHCCU-CL1, JEHCCU-CM1, JEHCCU-CM3, JEHSCU-CL3, JEHSCU-CM1 User manual

Important Note

Contents

1. Nomenclature

2. Safety and Health

3. Installation & Commissioning

4. Decommissioning & Disposal

5. Checklist