Carrier WeatherMaker 50TC 17-30 Series, Service And Maintenance Instructions

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NOTE: The four terminal blocks are removable. Slide out each
terminal block, wire it, and then slide it back into place.
Fig. 62 — W7220 Wiring Terminals
*Sylk is a trademark of Honeywell International Inc.
S-Bus Sensor Wiring
The labels on the sensors and controller are color coded for ease
of installation. Orange labeled sensors can only be wired to or -
ange terminals on the controller. Brown labeled sensors can only
be wired to S-bus (brown) terminals. Use Fig. 63 and Table 13 to
locate the wiring terminals for each S-Bus and enthalpy control
sensor.
Fig. 63 — S-Bus Sensor DIP Switches
Table 11 — Economizer Module
(Left Hand Terminal Blocks)
LABEL TYPE DESCRIPTION
Top Left Terminal Block
MAT
MAT
20k NTC
and COM
Mixed Air Temperature Sensor (Polarity
Insensitive Connection)
OAT
OAT
20k NTC
and COM
Outdoor Air Temperature Sensor (Polarity
Insensitive Connection)
S-BUS
S-BUS
S-BUS
(Sylk* Bus)
Enthalpy Control Sensor
(Polarity Insensitive Connection)
Bottom Left Terminal Block
IAQ 2-10
2-10 vdc
Air Quality Sensor Input (e.g. CO
2
sensor)
IAQ COM
COM Air Quality Sensor Common
IAQ 24V
24 vac Air Quality Sensor 24 vac Source
ACT 2-10
2-10 vdc Damper Actuator Output (2-10 vdc)
ACT COM
COM Damper Actuator Output Common
ACT 24v
24 vac Damper Actuator 24 vac Source
NA
AUX2-
OCC
E-GND
EXH1
AUX1-O
Y2-
Y1-
Y2-O
Y1-O
C
R
50048848-002
Rev. A
NA
A2
OCC
EX
A1
Y2I
Y2O
Y1I
Y1O
C
R
MAT
MAT
OAT
OAT
S-BUS
S-BUS
IAQ 2-10
IAQCOM
IAQ 24V
ACT 2-10
ACT COM
ACT 24V
MA
MA
OA
OA
SB
SB
SB
SB
SB
SB
V
C
R
V
C
R
NA
50040839-001
Rev. G
HJW10
www.energy.ca.gov
Certified FDD Product
California Title 24, Part 6
Table 12 — Economizer Module
(Right Hand Terminal Blocks)
LABEL TYPE DESCRIPTION
Top Right Terminal Blocks
AUX2 I
24 vac IN The first terminal is not used.
OCC
24 vac IN
Shut Down (SD) or HEAT (W)
Conventional only
and
Heat Pump Changeover (O-B) in Heat
Pump mode.
E-GND
E-GND Occupied/Unoccupied Input
EXH1
24 vac OUT Exhaust Fan 1 Output
AUX1 O
24 vac OUT
Programmable:
Exhaust fan 2 output
or
ERV
or
System alarm output
Bottom Right Terminal Blocks
Y2-I
24 vac IN
Y2 in - Cooling Stage 2 Input from space
thermostat
Y2-O
24 vac OUT Y2 out - Cooling Stage 2 Output to stage
2 mechanical cooling
Y1-I
24 vac IN
Y1 in - Cooling Stage 2 Input from space
thermostat
Y1-O
24 vac OUT Y1 out - Cooling Stage 2 Output to stage
2 mechanical cooling
C
COM 24 vac Common
R
24 vac 24 vac Power (hot)
DIP
SWITCH
LABEL
DIP
SWITCHES
(3)
S-BUS
2 PIN SIDE
CONNECTOR S-BUS
TERMINALS
(1 AND 2)