Honeywell Prestige 2.0 THX9421 - Page 155

THX9321 PRESTIGE
®
2.0 AND THX9421 PRESTIGE
®
IAQ WITH EIM
155 68-0311—07
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.
120
VAC
Y1 Y2 AUX AUX 2 G
24
VAC
O OR B
N
3
4
1
2 & 5
TR1
TR
Rooftop Unit
Transformer
L/A Y Y2 AUX AUX 2 G
Thermostat/EIM
R
C
W7213/W7214 Economizer Module
(See wiring guidelines provided with the product)
O/B
O/B
1
3
2
MCR34809
3
1
120
VAC
Y1 Y2 W1 W2 G
24
VAC
N
3
4
1
2 & 5
TR1
TR
Rooftop Unit
Transformer
AYY2WW2G
Thermostat/EIM
R
C
W7212 Economizer Module
(See wiring guidelines provided with the product)
1
MCR34257A