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Multi-Zone Outdoor Condenser Installation Manual

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NOTE ON ADDING ADDITIONAL REFRIGERANT
Some systems require additional refrigerant charging depending on pipe lengths. The standard
pipe length is 25' (7.5m). Pipe lengths greater than the standard length will require additional
refrigerant. The refrigerant should be charged from the service port on the outdoor unit's low
pressure valve. Additional refrigerant can be calculated using the following formula:
Liquid Side .25" (6.35mm) Liquid Side .375" (9.52mm)
(Actual pipe length - Standard pipe length) x 0.16oz/ft
or
(Actual pipe length - Standard pipe length) x 15g/m
(Actual pipe length - Standard pipe length) x 0.32oz/ft
or
(Actual pipe length - Standard pipe length) x 30g/m
BEFORE THE TEST RUN
Only perform the test run after you have completed the following steps:
• Electrical Safety Checks - Confirm that the unit's electrical system is connected and operating
correctly.
• Gas Leak Check - Check all flare nut connections and confirm the system is not leaking.
• Confirm that the low and high pressure valves are fully open.
• Check grounding work by measuring the grounding resistance by visual detection and with a
multimeter. The grounding resistance must be less than 0.1 Ω.
ELECTRICAL SAFETY CHECKS
After installation, confirm that all electrical wiring is installed in accordance with local and national
regulations, and according to this installation manual.
DURING TEST RUN
Check for electrical leakage using an electroprobe and multimeter. If electrical leakage is
detected, turn off the unit and immediately call a licensed electrician to find and resolve the cause.
ELECTRICAL AND GAS LEAK CHECKS
GAS LEAK CHECK
There are two methods to check for gas leaks:
1. Soap and Water Method - Using a soft brush, apply a soapy water or liquid detergent to all
pipe connection points on the indoor and outdoor unit. The presence of bubbles indicates a
leak.
2. Leak Detector Method - If using a leak detector, refer to the device's operation manual for
proper usage instructions.
WARNING
DO NOT mix refrigerant types.
WARNING
RISK OF ELECTRICAL SHOCK - All wiring must comply with local and national
electrical codes, and must be installed by a licensed electrician.