Honeywell Prestige THX9321 System Installation Manual page 16

System /nstallation Guide
Economizer Module wiring guides
Typical wiring of a W7220 Economizer Module for a heat pump system, using a
Prestige THX9321 thermostat or Equipment interface Module.
R°oftop u njt_
O/B
N YI AUX AUX2 G J
® ® ® ® ® ® ®j
W7220 Economizer Module
(Seewidng g@delEnes provided withthe product)
SD_@B @
®
Transformer
I dl
_ @ @ @ @
/
R
Therm0stat/E!M
MCR32959
Typical wiring of a W7220 Economizer Module for a conventional system, using a
Prestige THX9321 thermostat or Equipment Interface Module.
W7220 Economizer Module
(SeewNngguideEines provided withthe product)
SD_@B @
occ@
Y2J e -----_ #>
','_o @ ....
Yll@ _ _y_ ......... /j
R00ftop Unit
N Y1 Y2 Wl W2 G
@ @ @ @ @ @
L
.... f..... _ .
T
MCR32955
A "A" or "L/A" terminal must be configured for Economizer in the instaIler setup (tSU 2220).
These terminals are powered by the cooling transformer (Rc terminal).
A Terminal AUX 2 is present only on the Equipment interface Module.
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