128
Hot Gas Reheat Valve (HG-1/HG-2)
Figure 65 - Hot Gas Reheat
Units with a single reheat valve, HG-1 will be a three-way
valve. Units that use dual reheat valves will have HG-1 in-
line to the reheat coil inlet and HG-2 in-line to the outdoor
(condensing) coil inlet. Refer to
differences.
Power the unit OFF. Verify there is no damage to the wiring.
Check the wiring connections to the MUA board connector,
verify wiring connections to the schematic. Make sure all
connections are secure and connected.
Electronic Expansion Valve (EEV-1)
Figure 66 - EEV Wiring Reference
The Electronic Expansion Valve (EEV-1) wiring (
) is
connected to the MUA Board.
1. Power the unit OFF. Verify there is no damage to the wiring.
Make sure all connections are secure and connected.
2. Use a multi-meter to measure the resistance in the electronic
expansion valve harness from:
• The black wire to white wire. There should be
90-100 ohms
.
• The red wire to green wire. There should be
90-100 ohms
.
• The white wire to ground. There should be infinite resistance (open circuit).
• The black wire to ground. There should be infinite resistance (open circuit).
• The red wire to ground. There should be infinite resistance (open circuit).
• The green wire to ground. There should be infinite resistance (open circuit).
- If the readings are incorrect, there may be an issue with the electronic expansion valve. Replace
EEV if necessary.
- If the readings are correct and there are no issues with the electronic expansion valve, there may be
an issue with the superheat controller.
In-Line Valve
Three-Way Valve
2
4
1
3
J34
EEV-01
WH BK
GR
RD
