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Roof Top Unit (RTU)—
1 or
2 Heat and 1 or 2 Cool
NOTE: Terminal connections and menus
reflect firmware version R1.3.0.4 or
later. (Relay 3 and 4 were swapped in
versions earlier than R0.0.0.0.)
XEE-6311-075 or XEE-6311-100 Transformer
MEP-5372/7252/7552/7852 Fail-Safe Actuators
CSE-1102 Air Differential
Pressure Switch
STE-1416 Duct Averaging Temp. Sensor
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.
NOTE: This was 2 Heat and 2 Cool in
firmware R1.3.04 and earlier.
Multistage was added later.
BAC-1xx63 Series (6 Relays, 3 Analog Outputs)
STE-1402 Duct
Sensor, Type III
NOTE: EITHER FAN STATUS (FST) OR
DISCHARGE AIR TEMP (DAT) CAN
BE USED ON IN2, BUT NOT BOTH.
STE-1451 Outside Air Temp. Sensor
APPLICATION
DEGREES SCALE: °F
APP:
ROOF TOP
OPT: 1H/1C
ADDITIONAL SETUP
NOTE: Although typical terminal code letters are
shown, check the schematics of your unit for
wiring details.
Input Terminals
IN4
Opt. Outside Air Temp. (OAT)*
IN3
GND
IN2
*When using optional Outside Air Damper, must also have MAT/OAT
inputs (typically 10K, Type III thermistors). Ensure pull-up resistor
switch positions are set properly—see Illustration 3 on page 2.
**Fan Status (FST) or Discharge Air Temperature (DAT) is an optional,
selectable input. Ensure pull-up resistor switch positions are set
properly (10K position) for the relay, switch, or Type III thermistor.
Output
Typical Terminal
Terminals
Codes
Analog 9
GND
Analog 8
Analog 7
Relay 6
SC 4–6
RH/R
Relay 5
W2
Relay 4
W1
Relay 3
Y2
SC 1–3
RC/R
Relay 2
Y1
Relay 1
G
*If optional Outside Air Damper is used, must also have MAT/OAT inputs.
7
RTU 2H/2C LAYOUT
ADDITIONAL SETUP
DAMPER
FAN
HUMIDITY
SENSORS
RTU Input Connections
Opt. Mixed Air Temp. (MAT)*
Ground
Optional FST or DAT**
RTU Output Connections
(1 or 2 H and 1 or 2 C)
Outside Air Damper (OAD/RTD)*
Ground
(for analog output terminals 7–9)
24 VAC (for relay terminals 4–6)
Heat 2 (Optional)
Heat 1
Cool 2 (Optional)
24 VAC (for relay terminals 1–3)
Cool 1
Fan
BACnet Objects
AI4
AI3
AI2
BACnet
Objects
AO9
(AO8)
(AO7)
(BO6)
BO5
BO4
BO3
BO2
BO1
Installation Guide
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