KAUKAN KAC-1.5 Instruction Handbook Manual page 8

6.2 Monthly service
1. Clean the air filter and condenser.
2. Check the wirings, and motor running condition.
3. Check all screws/bolts/hose clamps...etc, retighten if necessary.
4. Check if there is any leakage (oil mark). Call the service engineer when you find any.
6.3 Checking Refrigerant leakage
Fill in the system ONLY with anhydrous nitrogen, using a 15-bar gas bottle with a pressure reducing valve.
Apply bubble water to check the leakage. If a leakage is detected, discharge the circuit. Then wield with
proper alloys to repair the leakage.
DANGER
6.4 Repairing the Refrigerant circuit [only by a certified engineer]
I n case of a repairing need in refrigerant circuit, you must follow the instructions:
- Check the refrigerant circuit. Fix the leakage if there is any.
- Vacuum and dry the refrigerant circuit.
- Fill in the correct type of refrigerant.
WARNING
6.5 Filling up the gas into refrigerant circuit
a) Use tube with 1/4 SAE terminals to connect refrigerant gas bottle to the compressor. Release a little refrigerant
gas first in order to evacuate the air in the connecting piping.
b) Before filling refrigerant into the system, if there is a solenoid valve control (220V A/C), please activate the
solenoid valve (SEV).
c) Reverse the refrigerant gas bottle. Feed into the circuit with liquid refrigerant until 75% of required amount
[indicated on the name plate]
d) Turn on the oil cooler and activate the compressor. Connect the refrigerant gas bottle to the compressor suction
line charging valve and complete the filling by keeping the refrigerant bottle in normal vertical position, until no
bubble appears on the liquid level visor.
6.6 Environment protection
No matter what type of refrigerant your cooler carries, it is forbidden to release it into the atmosphere. For this reason,
you should follow the regulation to recycle the cooler the end of the operating life.
WARNING
NEVER USE OXYGEN. EXPLOSIONS MAY OCCUR.
If the system should be discharged, collect the entire refrigerant with proper
instruments.
A particular care is recommend during service operations in order to reduce as
much as possible any refrigerant loss.
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