34
Shipping Temperature
–40 to 150°F (–40 to 65°C)
Relative Humidity
5% to 95% RH non-condensing
Economizer Module Wiring Details
Use Fig. 51 and Tables 4 and 5 to locate the wiring termi-
nals 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.
Fig. 51 — W7220 Economizer Module Terminal
Connection Labels
Table 4 — Economizer Module - Left Hand Terminal
Blocks
* Sylk is a trademark of Honeywell International Inc.
Table 5 — Economizer Module - Right 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 The bottom pin is not used.
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
Cert Product
California Title 24, Part 6
HJW10
www.energy.ca.gov
MAT
MAT
OAT
OAT
S-BUS
S-BUS
IAQ 2-10
IAQ COM
IAQ 24V
ACT 2-10
ACT CO M
ACT 24V
MA
MA
OA
OA
SB
SB
SB
SB
SB
SB
V
C
R
V
C
R
NA
50040839-001
Rev. G
LABEL TYPE DESCRIPTION
Top Right Terminal Blocks
N/A The first terminal is not used.
AUX2 I 24 vac IN
Shut Down (SD) or HEAT (W)
Conventional only
and
Heat Pump Changeover (O-B) in Heat
Pump mode.
OCC 24 vac IN Occupied/Unoccupied Input
E-GND E-GND Earth Ground — System Required
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 1 Input from
space thermostat
Y1-O 24 vac OUT
Y1 out - Cooling Stage 1 Output to
stage 2 mechanical cooling
C COM 24 vac Common
R 24 vac 24 vac Power (hot)
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