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Refrigeration Maintenance
200
Valve Installation
To install the vapor injection valve, perform the following steps:
1. Clean the tubes for soldering.
2. Place the new valve in position and solder the liquid line connections.
3. Pressurize the refrigeration system and check for leaks (see “Refrigerant Leak Test Procedure” in this
chapter). Repair leak if required.
4. Recover the refrigerant used for the leak test if no leaks were found.
5. Evacuate the system (see “Evacuation and Cleanup of the Refrigeration System” in this chapter).
6. Recharge the unit with R-404A (see “Charging the System with Refrigerant” in this chapter).
7. Perform a controller pretrip test to verify system operation.
NOTE: In most cases, only the coil requires replacement. No other repair is possible on solenoid
valves.
Compressor Digital Control Valve Replacement
Digital Control Valve Removal
To remove the compressor digital control valve, perform the following steps:
1. Isolate the compressor and digital valve from the system.
a. Front seat the discharge service valve by turning the valve fully clockwise.
b. Front seat the suction service valve by turning the valve fully clockwise.
c. Turn the digital service valve one quarter turn to the right.
2. Turn the Unit On/Off switch Off.
3. Disconnect electrical connections to valve coil.
4. Unsolder the liquid line connections to the valve.
5. Remove the valve from the unit.
Digital Control Valve Installation
To install the compressor digital control valve, perform the following steps:
1. Clean the tubes for soldering.
2. Place the new valve in position and solder the liquid line connections.
3. Perform a leak test (see Leak Testing the Refrigeration). Repair leak if required.
4. Check the refrigerant charge (see Checking the Refrigerant Charge).
CAUTION: Use a heat sink or wrap
switch with wet rags to prevent damage to
new switch.
CAUTION: Use a heat sink or wrap the
switch with wet rags to prevent damage to
the new switch.
Summary of Contents for 098203
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Page 3: ...MAGNUM TK 60275 4 MM Rev 3 08 15 Copyright 2012 Ingersoll Rand EMEIA Printed in Ireland...
Page 193: ...Refrigeration Maintenance 191 Figure 163 Filter Drier...
Page 200: ...Refrigeration Maintenance 198 Figure 169 Receiver Tank Figure 170 Water Cooled Condenser Tank...
Page 257: ...255 Schematic Diagram RELEASED 19 Sep 2013...
Page 258: ...256 Wiring Diagram Page 1 of 2 RELEASED 19 Sep 2013...
Page 259: ...257 Wiring Diagram Page 2 of 2 RELEASED 19 Sep 2013...
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