Carrier WeatherExpert 50LC 07 Series Service And Maintenance Instructions page 29

24 vac power supply
20 to 30 vac 50/60Hz; 100 VA Class 2 transformer.
OUTPUTS
Actuator Signal
2 to 10 vdc; minimum actuator impedance is 2k ohm; bus two-
wire output for bus communicating actuators.
Exhaust fan, Y1, Y2 and AUX1 O
All Relay Outputs (at 30 vac):
Running: 1.5A maximum
Inrush: 7.5A maximum
ENVIRONMENTAL
Operating Temperature
–40°F to 150°F (–40°C to 65°C).
Exception of display operation down to –4°F (–20°C) with full
recovery at –4°F (–20°C) from exposure to –40°F (–40°C)
Storage Temperature
–40°F to 150°F (–40°C to 65°C)
Shipping Temperature
–40°F to 150°F (–40°C to 65°C)
Relative Humidity
5% to 95% RH non-condensing
ECONOMIZER MODULE WIRING DETAILS
Use Fig. 43 and Tables 8 and 9 to locate the wiring terminals for
the Economizer module.
NOTE: The four terminal blocks are removable. Slide out each
terminal block, wire it, and then slide it back into place.
MAT
MA
MAT
MA
OAT
OA
OAT
OA
S-BUS
SB
SB
S-BUS
SB
SB
SB
SB
V
IAQ 2-10
C
R
IAQCOM
IAQ 24V
V
C
ACT 2-10
R
NA
ACT COM
ACT 24V
50040839-001
Rev. G
Fig. 43 — W7220 Wiring Terminals
NA
AUX2-
NA
OCC
A2
OCC
E-GND
EXH1
EX
A1
AUX1-O
Certified FDD Product
California Title 24, Part 6
HJW10
www.energy.ca.gov
Y2-
Y2I
Y2O
Y2-O
Y1I
Y1-
Y1O
Y1-O
C
R
C
R
50048848-002
Rev. A
Table 8 — Economizer Module
(Left Hand Terminal Blocks)
LABEL TYPE
Top Left Terminal Block
MAT
20k NTC
MAT
and COM
OAT
20k NTC
OAT
and COM
S-BUS
S-BUS (Sylk
S-BUS
Bus)
Bottom Left Terminal Block
IAQ 2-10
2-10 vdc
IAQ COM
COM
IAQ 24V
24 vac
ACT 2-10
2-10 vdc
ACT COM
COM
ACT 24v
24 vac
*Sylk is a trademark of Honeywell International Inc.
Table 9 — Economizer Module
(Right Hand Terminal Blocks)
LABEL TYPE
Top Right Terminal Blocks
AUX2 I
24 vac IN
OCC
24 vac IN
E-GND
E-GND
EXH1
24 vac OUT Exhaust Fan 1 Output
AUX1 O
24 vac OUT
Bottom Right Terminal Blocks
Y2-I
24 vac IN
24 vac OUT Y2 out - Cooling Stage 2 Output to stage
Y2-O
Y1-I
24 vac IN
24 vac OUT Y1 out - Cooling Stage
Y1-O
C
COM
R
24 vac
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. 44 and Table 10 to
locate the wiring terminals for each S-Bus and enthalpy control
sensor.
29
DESCRIPTION
Mixed Air Temperature Sensor (Polarity
Insensitive Connection)
Outdoor Air Temperature Sensor (Polarity
Insensitive Connection)
Enthalpy Control Sensor
(Polarity Insensitive Connection)
Air Quality Sensor Input (e.g. CO
sensor)
Air Quality Sensor Common
Air Quality Sensor 24 vac Source
Damper Actuator Output (2-10 vdc)
Damper Actuator Output Common
Damper Actuator 24 vac Source
DESCRIPTION
The first terminal is not used.
Shut Down (SD) or HEAT (W)
Conventional only
and
Heat Pump Changeover (O-B) in Heat
Pump mode.
Occupied/Unoccupied Input
Programmable:
Exhaust fan 2 output
or
ERV
or
System alarm output
Y2 in - Cooling Stage 2 Input from space
thermostat
2 mechanical cooling
Y1 in - Cooling Stage 2 Input from space
thermostat
2 Output to stage
2 mechanical cooling
24 vac Common
24 vac Power (hot)
2