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1
Thermostat
R
C
1
E
1
Auxiliary Heat
W/
(Heat Pump)
W1
W2
1
2
Indoor Blower Only
G
Heat Pump
O
Compressor/1st Stage
Y1
Compressor/2nd Stage
2
Y2
1 Refer to thermostat installation instructions
If applicable
2
3 Remove jumper wire for two-stage electric heat
NOTES:
W1 / W2 are auxiliary heat
(supplemental to heat pump).
"E" is emergency heat (disables heat pump).
FIGURE 16. Thermostat Designations –
Non-Communicating
Air Flow – Cooling Blower Speed
The cooling blower speed is factory configured to provide
correct air flow for an outdoor unit that matches the cool-
ing capacity rating of the air handler.
If the outdoor unit is smaller than the maximum cooling ca-
pacity rating for the air handler, the cooling blower speed
may need to be changed. Refer to blower performance
data on page 17 .
Indoor Unit
Outdoor Unit
R
C
Auxiliary Heat
(Heat Pump)
W1
W1
3
1
2
W2
G
O
Y1
Y1
Y2
Y2
R
C
ADJUSTING BLOWER SPEED
Motor Speed Taps
NOTE – Motor is programmed for a 45-second OFF delay
on all speed taps except TAP #4 (electric heat – 120-sec-
ond OFF delay).
These settings are for nominal tonnage match-ups with
the units. When matched with other sizes, it is recom-
mended that the CFM be adjusted to approximately 400
CFM per ton.
Tap
Operation
1
Continuous fan
O
2
Lower tonnage
speed
3
A/C or heat pump -
no electric heat
4*
A/C or Heat pump
with electric heat
5
High static
applications
* Tap 4 is minimum setting for electric heat
Page 16
WARNING
Electric shock hazard! - Disconnect all power
supplies before servicing.
Replace all parts and panels before
operating.
Failure to do so can result in death or
electrical shock.
Continuous fan speed is
energized (24 volt input to G).
nominal capacity (e.g. if 3-ton
air handler is used with 2.5-ton
outdoor unit).
at minimum static allowed.
ton at .5 static. Energized when
electric heat element has a call
for heat.
at .8 static.
TABLE 2
Remarks
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