KMC Controls FlexStat BAC-1xx63 Series Installation Manual page 8

Fan Coil Unit (FCU)—
2 or 4 Pipe, Modulating or 2 Position
4-PIPE MODULATING OPTION
(See the FCU—Other Options section on the next page for more options)
XEE-6311-050 Transformer
CSE-1102 Air Differential
Pressure Switch
REE-3211 Multi-Voltage Relays
BAC-1xx63 Series (6 Relays, 3 Analog Outputs)
VEP-45xxB745/
VEB-43xxxBCK
Valves with
MEP-4002 0–10
VDC Actuators
STE-1402 Duct
Sensor, Type III
NOTE: EITHER FAN STATUS (FST) OR
DISCHARGE AIR TEMP (DAT) CAN
BE USED ON IN2, BUT NOT BOTH.
NOTE:
Do not use
REE-3211s
with analog
outputs!
See Output
Connections
on page 3.
FCU 4-PIPE
MODULATING LAYOUT
NOTE:
Humidity
and occupan-
cy sensor
options are
dependent
on FlexStat
model.
Input Terminals FCU Input Connections
IN4
IN3 Supply Water Temp. (W-TMP)*
GND
IN2 Optional FST or DAT**
*Input for Supply Water Temp is typically a 10K,Type III thermistor.
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.
APPLICATION
DEGREES SCALE: °F
APP:
FAN COIL
OPT: 4–PIPE
ADDITIONAL SETUP
NOTE: To see Humidity options in
Output Terminals
(BAC-1xxx63C)
Analog 9
GND
(for analog output terminals 7–9)
Analog 8
Analog 7
Proportional (VLV)
Relay 6
SC 4–6 24 VAC (for relay terminals 4–6)
Relay 5
Relay 4
2-Position (VLV)
Relay 3
SC 1–3 24 VAC (for relay terminals 1–3)
Relay 2
Relay 1
*If optional Outside Air Damper is used, must also have MAT/OAT inputs.
8
BACnet Objects
Ground
ADDITIONAL SETUP
FAN
HUMIDITY
SENSORS
VALVE
the Additional Setup menu,
select the 4-Pipe option.
FCU Output Connections
2-Pipe 4-Pipe
Ground
Heat Valve,
Proportional (HTV)
Valve, Cool Valve,
Proportional (CLV)
Heat Valve,
2-Position (HTV)
Valve, Cool Valve,
2-Position (CLV)
Fan 3
Fan 2
Fan 1
(AI4)
AI3
AI2
BACnet
Objects
(AO9)
AO8
AO7
(BO6)
BO5
BO4
BO3
BO2
BO1
Installation Guide