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.
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 Remarks
1 Continuous fan Continuous fan speed is
energized (24 volt input to G).
2 Lower tonnage
speed
nominal capacity (e.g. if 3-ton
air handler is used with 2.5-ton
outdoor unit).
3 A/C or heat pump -
no electric heat
at minimum static allowed.
4* A/C or Heat pump
with electric heat
ton at .5 static. Energized when
electric heat element has a call
for heat.
5 High static
applications
at .8 static.
* Tap 4 is minimum setting for electric heat
TABLE 2
1
Refer to thermostat installation instructions
2
If applicable
3
Remove jumper wire for two-stage electric heat
W1 / W2 are auxiliary heat
(supplemental to heat pump).
“E” is emergency heat (disables heat pump).
NOTES:
W2W2
R
R
R
C
C
C
W1
W/
W1
W1
Auxiliary Heat
(Heat Pump)
G
G
Indoor Blower Only
O
O
Heat Pump
Y2
Y2
Thermostat Indoor Unit Outdoor Unit
E
Y1
Compressor/1st Stage
Y1
1
2
1
2
1
1
Auxiliary Heat
(Heat Pump)
Compressor/2nd Stage
1
2
O
Y1
Y2
3
FIGURE 16. Thermostat Designations –
Non-Communicating
Air Flow – Cooling Blower Speed
The cooling blower speed is factory congured to provide
correct air ow 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 .
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