Kaysun KEM-30 DRS4 User manual

SERVICE MANUAL
DC Inverter Air-cooled Modular Chiller
KEM-30 DRS4
KEM-60 DRS4
KEM-30 DRS4 KH
KEM-60 DRS4 KH

1
CONTENTS
Part 1 General Information ........................................................................... 3
Part 2 Component Layout and Refrigerant Circuits......................................... 5
Part 3 Control .............................................................................................. 23
Part 4 Diagnosis and Troubleshooting.......................................................... 39
CONTENTS

2

3
Part 1 - General Information
Part 1
General Information
1 Unit Capacities and External Appearance ..............................................4
2 Water outlet temperature range ...........................................................4

4
1 Unit Capacities and External Appearance
Table 1-1.1: Aqua Tempo Super II unit capacity range and unit appearances
Capacity 30kW 60kW
Model KEM-30 DRS4
KEM-30 DRS4 KH
KEM-60 DRS4
KEM-60 DRS4 KH
Appearance
Power
supply 380-415V/3Ph/50Hz
2 Water outlet temperature range
Table 1-2.1: Aqua Tempo Super II unit water outlet temperature range
Mode Range
Cooling Normal 5-20°C1
Low water outlet 0-20°C(reserved)2
Heating Normal 25-54°C
Notes:
1. For 30kW and 60kW units, when the ambient temperature is below 15°C, the water outlet temperature range is 10-20°C. When the ambient temperature
is above 15°C,all the units water outlet temperature range is 5-20°C.
2. For 30kW and 60kW units, use dial switch S12_3 on the main PCB to select the water outlet temperature range.

5
Part 2 - Component Layout and Refrigerant Circuits
Part 2
Component Layout and
Refrigerant Circuits
1 Layout of Functional Components .........................................................6
2 Piping Diagrams .................................................................................. 14
3 Refrigerant Flow Diagrams ................................................................. 20

6
1 Layout of Functional Components
KEM-30 DRS4
Figure 2-1.1: KEM-30 DRS4 front view
Wired
controller Electric
control box
Oil separator
Fan motor
DC inverter
compressor
Manual air
purge valve
Manual water
drain valve
Water outlet
pipe
Water side heat exchanger
Safety valve
Water flow switch
Water inlet pipe
Accumulator
Figure 2-1.2: KEM-30 DRS4 rear view

7
Part 2 - Component Layout and Refrigerant Circuits
Figure 2-1.3: KEM-30 DRS4 top view
Low pressure
switch
Electronic
expansion valve
High pressure
switch
High pressure
sensor
Four-way valve
Accumulator
Solenoid valve
SV4
Discharge
temperature
switch
Low pressure
gauge point
High pressure
gauge point

8
KEM-30 DRS4 KH
Figure 2-1.4: KEM-30 DRS4 KH front view
Wired
controller Electric
control box
DC inverter
compressor
Water side heat
exchanger
Manual water
drain valve
Manual air
purge valve
Safty valve
Water outlet pipe
Water flow switch
Buffer
Water inlet pipe
Accumulator
Fan motor
Oil separator
Figure 2-1.5: KEM-30 DRS4 KH rear view

9
Part 2 - Component Layout and Refrigerant Circuits
Low pressure
switch
Solenoid valve
SV4
Discharge
temperature
switch
Low pressure
gauge point
High pressure
gauge point
Electronic
expansion valve
High pressure
sensor
High pressure
switch
Accumulator
Four-way valve
Figure 2-1.6: KEM-30 DRS4 KH top view