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7–19
T-359
7.14 ECONOMIZER SOLENOID VALVE
a. Removing a Solenoid Valve Coil:
1. Turn unit power off and remove power from the unit. Disconnect leads.
2. Remove top screw and O-ring. Remove coil and save mounting hardware, seals and spacer for reuse.
(See
). Refer to step d. for valve coil replacement.
Figure 7.11 Coil View of Economizer Solenoid Valve (ESV)
1. Slotted Screw
2. Top Coil (small) O-ring
3. Solenoid Coil, Enclosing Tube and Body
4. Bottom Coil (large) O-ring
5. Brass Spacer
- - - - -
b. Removing the Solenoid Valve:
1. Pump down the compressor (refer to
) and frontseat both suction and discharge valves.
2. VALVE REMOVAL: The preferred method of re moving the solenoid valve is to cut the connection
between the brazed section and the valve, using a small tube cutter. Remove valve.
Alternately, heat inlet and outlet connections to valve body and remove valve.
3. Clean the valve stem with mild cleaner, if necessary.
c. Installing the Solenoid Valve:
1. Fit the new solenoid valve into position and braze. Use a wet rag to keep valve cool whenever brazing.
d. Installing the Solenoid Valve Coil:
1. Install the brass spacer on the valve stem.
2. Lubricate both O-rings with silicone provided in the kit.
3. Install bottom coil O-ring on the valve stem.
4. Install the solenoid coil on the valve stem.
5. Place the top coil O-ring on the coil mounting screw and secure the coil to the valve using a torque-
wrench. Torque the screw to 25 lb-in.
6. Connect coil wires using butt-splices and heat-shrink tubing.
Summary of Contents for 69NT40-561-019
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