T-319
6–8
3. Fully backseat the suction service valve and remove the service port cap.
4. Connect charging line between suction service valve port and cylinder of refrigerant R-134a. Open VAPOR
valve.
5. Partially frontseat (turn clockwise) the suction service valve and slowly add charge until the refrigerant
appears at the proper level.
6.8
SERVICING SOLENOID VALVES
6.8.1
Host Solenoid Valves
a. Replacing the Coil
NOTE
The coil may be replaced without removing the refrigerant.
1. Be sure electrical power is removed from the unit. Disconnect leads. Remove top screw and washer. Lift off
coil. (See
2. Verify coil type, voltage and frequency of old and new coil. This information appears on the coil housing.
Figure 6.6 Host Solenoid Valve
b. Replacing Valve
1. To replace the unloader, economizer, liquid injection or expansion bypass valve, pump down the unit. Refer
. Evacuate if unit is not equipped with service valves. Refer to
to replace the oil
return valve. Remove the refrigerant charge.
2. Be sure electrical power is removed from the unit. Disconnect leads. Remove top screw and washer. Lift off
coil. (See
3. Unbraze valve from unit and braze new valve in place.
4. Install coil. Evacuate low side and place unit back in operation. Check charge.
6.8.2
Remote Solenoid Valves
CAUTION
!
Do not over tighten or damage the enclosing tube assembly. Torque to 200-inch pounds (2.3
Mkg). Also make sure all parts are placed on the enclosing tube in proper sequence to avoid
premature coil burnout.
Slotted Screw
Washer
Coil
Enclosing Tube and Body
Summary of Contents for 69NT40-541-304
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Page 61: ...7 3 T 319 Figure 7 2 Schematic 69NT40 541 304...
Page 62: ...T 319 7 4 Figure 7 3 Unit Wiring Diagram Sheet 1 69NT40 541 304...
Page 63: ...7 5 T 319 Figure 7 4 Unit Wiring Diagram Sheet 2 69NT40 541 304...
Page 64: ...T 319 7 6 Figure 7 5 Legend 69NT40 541 345...
Page 65: ...7 7 T 319 Figure 7 6 Schematic 69NT40 541 345...
Page 66: ...T 319 7 8 Figure 7 7 Unit Wiring Diagram Sheet 1 69NT40 541 345...
Page 67: ...7 9 T 319 Figure 7 8 Unit Wiring Diagram Sheet 2 69NT40 541 345...
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Page 78: ...T 319 13 1 13 RECEIVER 8 5 17 18 19 20 4 Item 1 4 2 3 6 7 8 6 7 10 9 11 12 13 14 15 16 2...
Page 81: ...14 2 T 319...
Page 84: ...T 319 17 1 17 REMOTE EVAPORATOR FRAME A A A A 4 2 5 6 3 8 9 1 15 11 7 12 10 14 13 2 2 2 9 3 9...
Page 87: ...18 2 T 319...
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