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SERVICE AND TECHNICAL SUPPORT MANUAL
Figure 4
Furnace Setup Switch Description
S
E
T
U
P
SW1-1
SW1-2
SW1-3
SW1-4
SW1-5
SW1-6
SW1-7 & SW1-8
SW4-2
SW4-3
1
SW 2, AC (Cooling Airflow) SETUP SWITCHES
The AC setup switch selects desired cooling or high stage cooling (two stage units) airflow.
AC
See Air Delivery Tables for specific switch settings
SW 3, CF (Continuous Fan) SETUP SWITCHES
1
The CF setup switch selects desired Continuous Fan Airflow
The CF switch position is the low cooling airflow selection for two stage cooling units.
The CFM values in the Air Delivery Tables for SW 3 settings are the same as SW 2 settings.
CF
SW 3 cannot be set for airflow higher than SW 2
See Air Delivery Tables for specific switch settings
440 04 4201 01
S
W
T I
C
H
S
W
T I
C
H
N
A
M
E
Status Code Recovery
Low Heat Only
(Adaptive Heat Mode
when SW1-2 is OFF)
Low Heat Rise
Adjustment
Comfort/Efficiency
Adjustment
CFM per ton adjust
Component Self Test
Blower OFF delay
Intermendiate Heat
Only
(Adaptive Heat Mode
when both SW1-2 and
SW4-2 are OFF)
Intermediate
CFM per ton Adjust
AIR CONDITIONING (A/C) SETUP SWITCHES
CONTINUOUS FAN (CF) SETUP SWITCHES
Specifications subject to change without notice.
Furnace Setup Switch Description
N
O
R
M
A
L
P
O
I S
I T
O
N
Turn ON to retrieve up to 7 stored status codes for
OFF
troubleshooting assistance when R thermostat lead is
disconnected.
When SW1-2 is OFF allows low heat operation with a single
stage thermostat. Turn ON when using two-stage thermostat
to allow Low Heat operation when R to W/W1 closes and High
OFF
Heat operation when R to W/W1 and W2 close.
T
ON t i
Turn ON to increase Minimum Heat and Intermediate Heat
airflow by 18 percent. This compensates for increased return
OFF
air temperature caused with bypass humidifier. This also
increases the low heat inducer speed 15 percent.
Turn ON to decrease low heat airflow by 9 percent,
Intermediate Heat airflow 7 percent and high heat airflow 15
ON
percent for maximum comfort.
Turn ON for 400 CFM per ton, Turn OFF for 350 CFM per ton.
OFF
See also SW4.
Turn ON to initiate Component Self Test for troubleshooting
assistance when R thermostat lead is disconnected. Turn
OFF
OFF when Self Test is completed.
Blower Off Delay time – adjustable 90 seconds to 180
Bl
Off D l
ON or OFF
seconds. See table in Adjustments section or refer to unit
wiring diagram.
When SW1-2 is OFF allows Modulating operation from a
single stage thermostat. Turn ON when using two-stage
thermostat to allow Intermediate Heat operation when R to
W/W1 closes and Maximum Heat operation when R to W/W1
OFF
and R to W2 close.
Allows additional CFM per ton selections when used with SW
Allows additional CFM per ton selections when used with SW
1-5
325 CFM per ton (nominal) when SW 4-3 ON and SW 1-5 OFF
350 CFM per ton (nominal) when SW 4-3 OFF and SW 1-5 OFF
OFF
370 CFM per ton (nominal) when SW4-3 ON and SW 1-5 ON
400 CFM per ton (nominal) when SW 1-5 ON and SW 4-3 OFF
See Air Delivery Tables for model specific CFM vs. static
p
pressure
Gas Furnace: (F/G)9MAC
D
E
S
C
R
P I
I T
O
N
O
F
U
S
E
Mi i
H
t
d I t
di t H
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A11365
9
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