Zibro SM 18 113 Installationshandbuch Seite 63

instal_SM18113.qxd 29-02-2008
• Operating current rises.
• Cooling or heating efficiency drops.
• Moisture in the refrigerant circuit may freeze and block capillary tubing.
• Water may lead to corrosion of parts in the refrigeration system.
• Damage of the compressor.
Therefore, the indoor unit and tubing between the indoor and outdoor unit must always be leak tested and
evacuated with aid of a vacuum pump to remove any noncondensables and moisture from the system.
Connective pipe lenght
Less than 5m
5~15m
PIPE LENGTH AND REFRIGERANT AMOUNT
• When relocate the unit to another place, perform evacuation using vacuum pump.
• Make sure the refrigerant added into the air conditioner is in liquid form in any case.
• Only use the type of refrigerant as stated on the rating label.
ELECTRICAL SAFETY AND GAS LEAK CHECK
It is advised to perform an electrical safety and gas leakage check prior to operation.
• Electrical safety check
Perform the electric safe check after completing installation:
1. Insulated resistance
The insulated resistance must be more than 2M
2. Grounding work
After finishing grounding work, measure the grounding resistance by visual detection and groun-
ding resistance tester. Make sure the grounding resistance is less than 4 .
3. Electrical leakage check (performing during test running)
During test operation after finishing installation, use an electroprobe and multimeter to perform the
electrical leakage check. Turn off the unit immediately if leakage happens. Check and find out the
solution ways till the unit operate properly.
• Gas leak check
1. Soap water method
2. Dedicated special leak detector
09:04 Pagina 63
Air purging method
Use vacuum pump.
Use vacuum pump.
Additional amount above rating label amount of
refrigerant to be charged
------------------------
(Pipe length-5)x15g
.
4
63