Honeywell Prestige 2.0 THX9421 Manual page 155

Typical wiring of a W7213/W7214 Economizer Module for a heat pump system, using a Prestige THX9321 thermostat or
Equipment Interface Module.
Fig. 353. Wiring a W7213/W7214 Economizer Module for a heat pump system.
Typical wiring of a W7212 Economizer Module for a conventional heating system, using a Prestige THX9321 thermostat
or Equipment Interface Module.
Fig. 354. Wiring a W7212 Economizer Module for a conventional heating system.
1 "A" or "L/A" terminal must be configured for Economizer in the installer setup (ISU 2220). These terminals are powered
by the cooling transformer (Rc terminal).
2 Terminal AUX 2 is present only on the Equipment Interface Module.
3 Add a normally closed relay as shown to make the W7213/W7214 Economizer Module compatible with the thermostat.
The thermostat energizes the "A" or "L/A" terminal during Occupied Periods.
W7213/W7214 Economizer Module
(See wiring guidelines provided with the product)
O OR B
N
3
4
1
2 & 5
TR1
TR
Transformer
W7212 Economizer Module
(See wiring guidelines provided with the product)
N
3
4
1
2 & 5
TR1
TR
Transformer
®
THX9321 PRESTIGE
O/B
1
3
3
O/B L/A
1
R
120
24
C
VAC VAC
A
1
R
120 24
VAC C
VAC
155
2.0 AND THX9421 PRESTIGE
Rooftop Unit
Y1 Y2 AUX AUX 2 G
Y Y2 AUX AUX 2 G
2
Thermostat/EIM
MCR34809
Rooftop Unit
Y1 Y2 W1 W2 G
Y Y2 W W2 G
Thermostat/EIM
MCR34257A
®
IAQ WITH EIM
68-0311—07