Service Valve |
Valve Closed |
Valve Open |
Figure 10
To Close Liquid or Suction Line Service Valve:
1.Remove the stem cap with an adjustable wrench.
2.Use a service wrench with a
3.Replace the stem cap. Tighten finger tight, then tighten an additional 1/6 turn.
Suction Line (Ball Type) Service Valve
Suction line (ball type) service valves function the same way as the other valves; the difference is in the construc- tion (see Figure 11).
The ball valve is equipped with a service port with a
Ball Type Service Valve
(Valve Open)
Use adjustable wrench. To open, rotate stem counterclockwise 1/4 turn (90°). To close, rotate stem clockwise 1/4 turn (90°).
Figure 11
Leak Testing
After the line set has been connected to the indoor and outdoor units, the line set connections and indoor unit must be checked for leaks.
WARNING
Refrigerant can be harmful if inhaled. Refrigerant must always be used and recovered responsibly. Incorrect or irresponsible use of refrigerant can result in personal injury or death.
WARNING
Never use oxygen to pressurize refrigeration or air conditioning systems. Oxygen will ex- plode on contact with oil and could cause personal injury or death.
Using an Electronic Leak Detector
1.Connect the high pressure hose of the manifold gauge set to the suction valve service port. (Normally the high pressure hose is connected to the liquid line port; however, connecting it to the suction ports helps to protect the manifold gauge set from damage caused by high pressure.)
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