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

Page 6

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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.

This manual is related to the following products: