Installation and Commissioning Guide
Wall Hung Split System
Installation and Commissioning Guide - Wall Hung Split System
Doc. No.9590-5007
Ver. 2 210416
41
8. Insert hexagonal wrench into the packed valve (high pressure valve) and open the valve by turning the wrench in a 1/4
counterclockwise turn. Listen for gas to exit the system, then close the valve after 5 seconds.
9. Watch the Pressure Gauge for one minute to make sure that there is no change in pressure. The Pressure Gauge
should read slightly higher than atmospheric pressure.
10. Remove the charge hose from the service port.
11. Using hexagonal wrench, fully open both the high pressure and low pressure valves.
12. Tighten valve caps on all three valves (service port, high pressure, low pressure) by hand. You may tighten it further
using a torque wrench if needed.
CAUTION
When opening valve stems, turn the hexagonal wrench until it hits against the stopper. Do not try to force the valve to
open further.
CAUTION
• Refrigerant charging must be performed after wiring, vacuuming and the leak test.
• DO NOT
exceed the maximum allowable quantity of refrigerant or overcharge the system. Doing so can damage or
impact the unit’s function.
• Charging with unsuitable substances may cause explosions or accidents. Ensure that the appropriate refrigerant is used.
• Refrigerant containers must be opened slowly. Always use protective gear when charging the system.
• DO NOT
mix refrigerant types.
• Some systems require additional charging depending on pipe lengths. The standard pipe length is 15m.
For Refrigerant Charge Details, refer to R-32 Safety Manual.
13. Electrical and Gas Leak Checks
