4.Remove the vinyl cap off of the desired speed tap wire (Refer to Table 3 for color coding) for the normal cooling fan speed and place desired speed tap wire on “HIGH” on the interface board.
5.Refer to airflow tables (Table 4) to determine allowable speeds for the dehumidification cooling fan speed. In Table 4, speeds that are not allowed for dehumidification cooling are shaded.
6.Remove the vinyl cap off of the desired speed tap wire (Refer to Table 3 for color coding) for the dehumidification cooling fan speed and place desired speed tap wire on the “LOW” connection on the interface board (IFB). Verify that static pressure is in the acceptable range for the speed tap to be used for dehumidification cooling.
7.Use any spare vinyl plugs to cap any unused speed tap wires.
Single Speed Cooling With Higher Electric Heat Speed
This unit can also be configured to operate with single speed cooling and a higher speed for an accessory electric heater.
1.Move the two pin DEHUM jumper located on control board (see Fig. 16) from the “STD” position to the “DEHUM” position.
2.See Table 2 for minimum airflow for electric heat operation. Add electric heater and filter pressure drop to duct system static pressure to determine total external static pressure.
3.Select speed tap from Table 4 that will achieve required airflow from Table 2.
4.Remove the vinyl cap off of the desired speed tap wire (Refer to Table 3 for color coding).
5.Connect the desired speed tap wire to the “HIGH” terminal on the interface fan board (IFB).
!CAUTION
UNIT OPERATION HAZARD
Failure to follow this caution may result in unit component damage or improper operation.
To use this mode, a speed connection must be made on the “HIGH” terminal that meets or exceeds the minimum airflow found in Table 2.
Table 3 – Color Coding for Indoor Fan Motor Leads
Black = High Speed
Orange =
Red = Med Speed
Pink =
Blue = Low Speed
!WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Disconnect electrical power to the unit and install lockout tag before changing blower speed.
Continuous Fan Operation
When the DEHUM feature is not used, the continuous fan speed will be the same as cooling fan speed. When the DEHUM feature is used, the continuous fan will operate on IFB “LOW” speed when the DH control lead is not energized, or IFB “HIGH” speed when the DH lead is energized (see Fig. 16).
607C-- -- A
ACCUMULATOR | COMPRESSOR |
HP S
OUTDOOR COIL | INDOOR COIL |
TXV in Metering
Position
LCS
LEGEND | Bypass |
Position |
HPS – High Pressure Switch
LCS – Loss of Charge Switch
Accurater®Metering De vice
Arrow indicates direction of flow
C03011
Fig. 15 - Typical Heat Pump Operation, Cooling Mode
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