KMC Controls BAC-4000 series, Installation, Operation, And Application Manual

Page: 108 / 128

Heat Pump Unit
applications
This section covers applications for fan coil units. For other applications see
Fan Coil Unit applications on page 78
and
Roof Top Unit applications on page
98 .
Heat pump unit—Three heat, two cool
This application applies to models BAC-4001CW0003, BAC-4021CW0003,
BAC-4201CW0003, and BAC-4221CW0003.
Fan status switch (FST) and discharge air temperature sensor (DAT) are
optional. They are typically used only when the AppStat is connected to
a network.
The outdoor air temperature sensor (OAT) is required for compressor
lockout based on outside air temperature.
For dehumidification, the AppStat must include a humidity sensor.
Auxiliary heat is required for dehumidification.
The remote temperature sensor (RS) is optional.
For single compressor installations, delete the Y2 connection.
If auxiliary heat is not required delete the AUX/E connection.
Connect outputs only to 24 volt AC pilot duty inputs.
For additional details on connecting sensors, see Connecting inputs on
page 20
.
KMC Part
No. Description Function
CSE-1102 Differential Pressure Switch, Barb Fittings Fan status switch
STE-1405 Duct temperature sensor, 10 kΩ Type III Discharge air temperature
STE-1451 Outdoor air temperature sensor, 10 kΩ Type III Outdoor air temperature
STE-6011W10 Temperature sensor, 10 kΩ Type II Remote space temperature
XEE-6111-040
XEE-6112-040
XEE-6311-075 Single-hub 120 volt power transformer
Dual-hub 120 volt power transformer
120/240/277/480VAC, 24 VAC, 75 VA transformer Controls transformer
Table 6–16 Materials list
Section 6: Application drawings KMC Controls, Inc.
108 Revision G