Daikin JEHCCU0180CL3 [4/216] English

Daikin JEHSCU0360CM3 [4/216] English
O-CU06-AUG17-3
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
* M: Medium temperature; L: Low temperature
The low pressure cut off pressure is the setting of cut in minus the
differential.
3.9 Fan speed controller setting
The fan speed controller control the condensing head pressure via
speed regulating according to the ambient temperature. The setting
for fan cut off should be set higher than the recommended value in
table below, to maintain enough liquid sub cooling ahead of TXV for
low ambient application.
3.7 Vacuum - moisture removal
Air and moisture reduce service life and increase condensing
pressure causing abnormally high discharge temperatureslikely to
destroy the oil’s lubricating properties. The risk of acid formation is
also increased by air and moisture and copper plating can be gener-
ated in this way. All these phenomena can cause mechanical and
electrical failure.
3.8 Safety pressure switch settings
The pressure switch fitted to condensing units with auto reset for low
pressure andmanual reset for high pressure are NOT factory preset.
High pressure safety (Manual reset)
The high pressure safety switch is required to protectthe compressor
from working out of its envelope. The high pressure switch shall set
equal or lower than below values depending on the type of
refrigerant, application and the ambient condition.
Low pressure safety (Auto reset)
The low pressure safety switch is used to avoid compressor operate
at too low suction pressure or a vacuum condition. The low pressure
safety cut out should never be set lower than value shown in
following table. If pump down is used, the electrical circuitry should
be arranged so that compressor restart is triggered by demand from
thermostat rather than a reset low pressure switch.
Important Note
Moisture prevents proper functioning of the compressor
and the refrigeration system.
Important Note
Ensure that a good quality vacuum pump is used to pull a
minimum vacuum 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.
=
12mm
in./6mm
flare
19
18
188
1
3
7
14
9
10
15
13
11
¼
5
20
1216
2
1. Low pressure (LP) setting spindle
2. Differential setting spindle, LP
3. Main arm
5. High pressure (HP) setting spindle
7. Main spring
8. Differential spring
9. Bellows
10. LP connection
11. HP connection
12. Switch
13. Terminals
14. Earth terminal
15. Cable entry
16. Tumbler
18. Locking plate
19. Arm
20. Manual reset button
Model
Refrigerant
Cut Out (barg)
Cut Out (psig)
AE/CAJ/TAJ MTZ/ZB/ZF
R404A
27.7
402
R134a
18
261
R404A
27.7
402
R134a
18
261
Model
Refrigerant
Application
Cut out (barg)
Cut out (psig)
AE/CAJ/TAJ MTZ ZB/ZF
R134a R404AR404A R134a R407C R404A R134a
M*
1.5
21.8
L*
0.1
1.5
M*
0.5
7.3
M*
1.0
14.5
M*
0.6
8.7
M*
1.4
20.3
M*
2.0
29.0
L*
0.1
1.5
M*
0.6
8.7
Low Pressure side
range adjusting screw
Clockwise:
Decrease cut in
pressure setting
Anticlockwise:
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
Manual reset switch
Important Note
There must be no more than 10 compressor starts per hour.
A higher number reduces the service life of the compressor.
If necessary, use an anti-short-cycle timer in the control
circuit. Minimum a 2 minutes runtime after each start of
compressor and a 3 minute idle time after each stop & start
are recommended. Only during the pump down cycle may
the compressor run for much shorter intervals.
ENGLISH

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