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© 1995-2017 Energy Saving Products Ltd.
*Note: FZ to FZ
recommended to be wired to Freeze Stat (Anti-Ice Control). For chilled water applications, a jumper between FZ to
FZ must be installed to complete the Y2 - 24V Signal to Y on Condenser.
HE-Z Fan Coil - PSB Circuit Board Wiring
24 VAC Input terminals (tstat connections):
W1:
1st stage Heating, Runs at the heating speed when 24v (R) is supplied, set by the heat trim
pot.
W2:
2nd stage Heating, Runs at the heating speed when 24v (R) is supplied, set by the heat
trim pot. The difference between a W1 call and a W2 call is the output terminal that will be
energized with 24v. (W1 energized on t-stat terminal strip will provide 24v to W1 on output
terminal strip, W2 energized on t-stat terminal strip will provide 24v to W2 on output ter
-
minal strip,)
C:
Common
G:
Constant Fan, Runs at the Constant Fan speed when 24v (R) is supplied, set by the Fan trim
pot.
R:
24 volt supply
(Note: As long as Transformer is connected & the Fire Disconnect/Jumper Pin Header is
Present)
Y2:
2nd stage Cooling, Runs at the Cooling speed when 24v (R) is supplied, set by the Cool trim
pot.
Y1:
1st stage Cooling, Runs at the Cooling speed when 24v (R) is supplied, set by the Cool
trim pot. The difference between a Y1 call and a Y2 call is the output terminal that will be
energized with 24v. (Y1 energized on t-stat terminal strip will provide 24v to Y1 on output
terminal strip, Y2 energized on t-stat terminal strip will provide 24v to Y2 on output terminal
strip,)
D:
Runs at 70% Cooling speed when 24v (R) is supplied, set by the Cool trim pot.
O/B:
Heat Pump Reversing
Fan Speed Priority Sequence (from highest to lowest):
D=1st Y=2nd W=3rd G=4th
24 VAC Output terminals (24v output connections):
R:
24 volt Supply
(Note: As long as Transformer is connected & the Fire Disconnect/Jumper Pin Header is
Present)
C:
Common
Y1:
1st Stage Cooling Equipment
Y2:
2nd Stage Cooling Equipment*
W2:
24v Output to 2nd Stage Heating Equipment.
W1:
24v Output to 1st Stage Heating Equipment.
FZ:
Freeze Stat Connection*
FZ:
Freeze Stat Connection*
-24-
Module WIR
Hi-Velocity Wiring & Settings (4/10)
Module WIR Hi-Velocity Wiring and Settings (4/10)
