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Installation
Electrical and gas leakage testing
Before the function test
Only perform the function test after the following steps have been completed:
Electrical safety checks -Confirm that the unit's electrical system is safe and functioning properly.
Gas Leak Check - Check all flare nut connections and confirm that the system does not leak.
Confirm that the gas and liquid valves (high and low pressure) are fully open.
Electrical safety checks
After installation, confirm that all electrical wiring was installed in accordance with local and national
regulations and in accordance with the installation manual.
Before the function test
Check the earthing work
Measure the grounding resistance by visual detection and with the grounding resistance tester. The
grounding resistance must be less than 0.1 Ω.
Note: This may not be necessary for some locations in North America.
During the function test
Check for Electrical Leakage
During the Run Test, use an electrical probe and a multimeter to perform a complete electrical leakage
test.
If electrical leakage is detected, turn off the unit immediately and call a licensed electrician to find and
resolve the cause of the leakage..
WARNING! RISK OF ELECTRIC SHOCK
All wiring must comply with local and national electrical codes and must be installed by a licensed elec-
trician.
Gas Leak Checks
There are two different methods for checking for gas leaks.
Soap and water method
Using a soft brush, apply soapy water or liquid detergent to all pipe connection points of the indoor and
outdoor unit. The presence of bubbles indicates a leak.
Leak detector method
If using a leak detector, refer to the instruction manual of the device for corresponding operating ins-
tructions.
After performing the gas leak check
After confirming that all pipe connection points are NOT leaking, replace the valve cover on the outdoor
unit.
Outdoor unit control point
Indoor unit control point
A: Low pressure shut-off valve
D
B: High pressure shut-off valve
B
C and D: Indoor unit flare nuts
C
A
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