21
Additional Charge
Refrigerant for the pipe length of 25 feet has been charged at the factory. If the piping is greater than
25 feet additional charging is necessary. For the additional amount, see the table below.
Model
Add’l Refrigerant Amount for Extra Pipe
18K
1.6 ounce per 5 feet
24-48K
3.2 ounce per 5 feet
TESTING AND INSPECTION
VAC valve
Vacuum pump
Service port
Low pressure gauge
High pressure gauge
Gauge manifold kit
Pressure gauge (low-pressure)
Pressure gauge (hi-pressure)
Gauge manifold
Connection pipe
Cap
Cap
Service pipe
Cap
Hose with the valve pin
Hose
Vacuum pump
Hose
Switch (hi-pressure)
Switch (low-pressure)
Connection pipe (to indoor unit)
Liquid valve
Gas valve
Service port
Pipe Testing
Leaking Test
1. Connect the charging hose of the manifold valve to the end of the low-pressure valve.
2. Add dry nitrogen to a pressure of 200 lbs. Tightly close both high- and low-pressure valves.
3. Leak-test flare fittings with soap bubbles. If no leak is detected, release nitrogen.
Use vacuum pump, rather than refrigerant, to discharge air when installing the unit.
CAUTION
