FOR HVAC INSTALLER AND HOMEOWNER
WARNING: TO AVOID TRANSFORMER DAMAGE ONLY CONNECT THE WHITE WIRE TO THE CONTROL IF A DAMPER IS USED.
The white wire controls the optional motorized damper that can be installed into a fresh air duct. This provides the ability to control when fresh air is introduced into the building by using the ventilation timer function labeled “DMP” on the control (See Section 3.7). IF THE MOTORIZED DAMPER IS
NOT USED, DO NOT CONNECT THE WHITE WIRE TO THE CONTROL OR DAMAGE TO THE TRANSFORMER MAY RESULT. Simply leave the (DMP) terminal unused if the damper is not used, and cap off the white lead from the Ultra- Aire dehumidifier.
2.3 Auxiliary relay operation
At times it may be desirable to coordinate fan operation of the central heating/cooling system with dehumidifier operation. The DEH 3000 features a relay that provides this ability. The relay terminals labeled NC, COM and NO operate according to the following chart:
Dehumidification |
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Operation | COM/NO | COM/NC |
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ON | CLOSED | OPEN |
OFF | OPEN | CLOSED |
Common uses (assuming standard thermostat wiring color schemes as noted):
Disengage A/C during dehumidification
Redirect the yellow thermostat wire to the NC terminal. Wire the yellow wire from the A/C to the COM terminal.
Engage the A/C central fan during dehumidification
1.Disconnect the green wire that runs to the fan relay from the screw on the thermostat.
2.Connect the green wire that runs to the fan relay to the COM screw on the DEH3000 board.
3.Run a wire from the red wire screw on the thermostat to the NO (Normally Open) screw on the DEH3000 board.
4.Run a wire from the green wire screw on the thermostat to the NC (Normally Closed) screw on the DEH3000 board.
The central fan should run when the Thermostat fan switch is turned to ON and when the dehumidifier is operating.
2.4Dehumidifier lockout/activation: AC sensor feature
The control has the ability to activate the dehumidifier or deactivate the dehumidifier when the air conditioner is running.
Standard wire colors for thermostats are as follows:
Description | Color | Terminal code |
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24VAC Return | Red | R |
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Call for Heat | White | W or W1 |
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Force Fan On | Green | G |
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Compressor |
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Call for Cooling | Yellow | Y or Y1 |
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12 |
