Heat pump unit (hpu) – KMC Controls BAC-14xx63 Series FlexStat User Manual
Page 6

BAC-12xx63/13xx63/14xx63 Series FlexStat
6
Installation Guide, Rev. C
STE-1416 Duct Averaging Temp. Sensor
MEP-5372/7252/7552/7852 Fail-Safe Actuators
XEE-6311-075 or XEE-6311-100 Transformer
STE-1451 Outside Air Temp. Sensor
NOTE: WIRE TO “O” TERMINAL IF
REVERSING VALVE IS
ENERGIZED IN COOLING
MODE; WIRE TO “B”
TERMINAL IF REVERSING
VALVE IS ENERGIZED IN
HEATING MODE.
HPU LAYOUT
CSE-1102 Air Differential
Pressure Switch
NOTE: EITHER FAN STATUS (FST) OR
DISCHARGE AIR TEMP (DAT) CAN
BE USED ON IN2, BUT NOT BOTH.
STE-1402 Duct
Sensor, Type III
Heat Pump Unit (HPU)—
1 or 2 Compressors with Auxiliary and Emergency Heat
Output
Terminals
Typical
Terminal
Codes
HPU Output Connections
BACnet
Objects
Analog 9
Outside Air Damper (OAD/RTD)*
AO9
GND
Ground
(for analog output terminals 7–9)
Analog 8
AO8
Analog 7
AO7
Relay 6
W2/E
Emergency Heat (Optional)
BO6
SC 4–6
R
24 VAC (for relay terminals 4–6)
Relay 5
W
Auxiliary Heat (Optional)
BO5
Relay 4
Y2
Compressor 2 (Optional)
BO4
Relay 3
Y1
Compressor 1
BO3
SC 1–3
R
24 VAC (for relay terminals 1–3)
Relay 2
O/B
Reversing Valve
(see O/B Note in schematic)
BO2
Relay 1
G
Fan
BO1
*If optional Outside Air Damper is used, must also have MAT/OAT inputs.
APPLICATION
DEGREES SCALE: °F
APP:
OPT: 1 STAGE
ADDITIONAL SETUP
HEAT PUMP
ADDITIONAL SETUP
AUX HEAT
DAMPER
FAN
HUMIDITY
OPTIMUM START
SENSORS
NOTE: To see Humidity options in the
Additional Setup menu, select
an Aux. Heat option other than
None (the default).
Input Terminals
HPU Input Connections
BACnet Objects
IN9
Opt. Remote CO
2
Sensor*
AI9
IN8
AI8
IN7
Opt. Remote Temp. Sensor*
AI7
IN4
Opt. Outside Air Temp. (OAT)**
AI4
IN3
Opt. Mixed Air Temp. (MAT)**
AI3
GND
Ground
IN2
Optional FST or DAT*
AI2
*Fan Status (FST), Discharge Air Temperature (DAT), and (not shown
on the diagram) remote temp./CO
2
sensors are optional inputs. Set
pull-up resistor switch positions appropriately (see the Input
Connections section).
**When using the optional Outside Air Damper, MAT/OAT inputs must
also be connected.