Roof top unit (rtu)— 1 or 2 heat and 1 or 2 cool, Roof top unit (rtu)— 1 or, 2 heat and 1 or 2 cool 7 – KMC Controls BAC-14xx63 Series FlexStat User Manual

Page 7: 2 heat and 1 or 2 cool

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BAC-12xx63/13xx63/14xx63 Series FlexStat

7

Installation Guide, Rev. C

STE-1451 Outside Air Temp. Sensor

STE-1416 Duct Averaging Temp. Sensor

MEP-5372/7252/7552/7852 Fail-Safe Actuators

XEE-6311-075 or XEE-6311-100 Transformer

IF BOTH RC AND RH TERMINALS ARE PRESENT:
WIRE RC TO SC 1-3 AND RH TO SC 4-6.

IF ONLY ONE “R” TERMINAL IS PRESENT:
WIRE BOTH SC 1-3 AND SC 4-6 TO R.

RTU 2H/2C 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

Roof Top Unit (RTU)—
1 or

2 Heat and 1 or 2 Cool

Output

Terminals

Typical Terminal

Codes

RTU Output Connections

(1 or 2 H and 1 or 2 C)

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

BO6

SC 4–6

RH/R

24 VAC (for relay terminals 4–6)

Relay 5

W2

Heat 2 (Optional)

BO5

Relay 4

W1

Heat 1

BO4

Relay 3

Y2

Cool 2 (Optional)

BO3

SC 1–3

RC/R

24 VAC (for relay terminals 1–3)

Relay 2

Y1

Cool 1

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: 1H/1C
ADDITIONAL SETUP

ROOF TOP

ADDITIONAL SETUP

DAMPER

FAN
HUMIDITY
OPTIMUM START
SENSORS

Input Terminals

RTU 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.

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