Figure 7.14 View Of Digital Unloader Valve (Duv) Assembly - Carrier Transicold 69NT40-561-001 Operation And Service Manual

6. Remove the valve. The preferred method of removing the valve is to cut the connection between the brazed
section and the valve, using a small tube cutter. Remove the valve.
Alternately, use a wet rag to keep valve cool. Heat inlet and outlet connections to valve body and remove valve.
7. Clean the valve stem with mild cleaner, if necessary.
7.19.2 Installing the Economizer Expansion Valve
1. The economizer expansion valve should be wrapped in a soaked cloth for brazing.
2. Braze inlet connection to inlet line.
3. Braze outlet connection to outlet line.
4. Reinstall the cushion clamps on inlet and outlet lines.
5. Replace filter drier (see
6. Evacuate to 500 microns by placing vacuum pump on liquid line and suction service valve.
7. Check economizer expansion valve superheat (see
7.20 Digital Unloader Valve (DUV)
7.20.1 Removing the DUV
1. Pump down the compressor (see
the DUV is stuck open and compressor cannot pump down, remove charge.
2. Turn unit power off and remove power from the unit.
3. Loosen bolt on top of the DUV and remove coil assembly.
There is a small spacer tube between the top of the valve and the 12 VDC coil that needs to be rein-
stalled into the solenoid valve coil. When removing the coil, it may fall out when lifted from the valve
body. Take care that the spacer is not lost; the valve will not function correctly without it.
4. Remove clamps holding the DUV to the discharge line.
5. Loosen the nuts attaching the DUV to the top of the compressor.
6. Remove the valve. The preferred method of removing the solenoid valve is to cut the connection between
the brazed section and the valve, using a small tube cutter. Remove the valve (see
Alternately, use a wet rag to keep valve cool. Heat outlet connection to valve body and remove valve.
1) Sleeve
2) O-ring (hidden)
3) Screen Valve Strainer
Section 7.13).
Section 7.4) and frontseat both suction and discharge valves. In the event

Figure 7.14 View of Digital Unloader Valve (DUV) Assembly

2
1
6
Section 3.2).
NOTE
3
4
5
4) Tube
5) Solenoid Valve Body
6) Hex Nut, 1/2 OD
- - - - -
7–21
Figure 7.14).
T-340