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S9240F2051 MODULATING INTEGRATED FURNACE CONTROL
SW2: SEQUENCE
The sequence is factory-set (OFF) to respond to a thermostat
as dictated by the SW1 selection.
The ON position configures the IFC for the Allied modulating
firing state sequence with 2-stage thermostat; and SW1 must
be OFF.
NOTES:
1.
SW2 position is ignored if SW1 is ON.
2.
When used in a communicating system, both
SW1 and SW2 are ignored.
SW3: 2ND STAGE ON DELAY
The On Delay timing applies to systems configured only with
single stage thermostats. It is the length of time operating in
normal low fire mode before switching to high fire mode. The
timing is factory-set (OFF) to 7 minutes.
Description
2-Stage Thermostat: 2nd and 3rd stage On Delay disabled
Single Stage Thermostat: 2nd and 3rd stage On Delay
enabled
Conventional 2-stage sequence with 2-stage thermostat
Special modulating sequence with 2-stage thermostat
2nd Stage On Delay - 7 minutes
2nd Stage On Delay - 12 minutes
Heat Fan Off Delay - 60 seconds
Heat Fan Off Delay - 90 seconds
Heat Fan Off Delay - 120 seconds
Heat Fan Off Delay - 180 seconds
a
Switch 2 is ignored if switch 1 is in the ON position.
b
Switch 3 is ignored if switch 1 is in the OFF position.
c
When configured with a communicating thermostat, both SW1 and SW2 are ignored.
d
Switch 6 is not used.
e
Switch 7 is not used.
DIP Switch S2 Settings – Cooling Airflow
DIP Switch S2 is used to adjust the cooling speed and profile.
Refer to Fig. 4 on page 7 for location of DIP switch S2.
69-2807—01
Table 5. DIP Switch S1 Settings - Defaults in Bold.
c
The ON position configures the 2nd stage On Delay for 12
minutes.
NOTE: SW3 position is ignored if SW1 is OFF.
SW4-5: HEAT FAN OFF DELAY
The Heat Fan Off Delay is the period between the loss of
supervised main burner flame after the call for heat has ended
and the deactivation of the blower motor at the low heat
speed. The timing is factory-set (all OFF) to 90 seconds. See
Table 5 for other timing settings.
SW6-7
These two switches are not used.
Individual Switches
a
b
SW1
SW2
SW3
OFF
ON
OFF
ON
OFF
ON
The default factory settings (all OFF) are shown in Fig. 6 and
indicated in Bold in Table 6.
To change any setting, first disconnect the power, then set
SW8 through SW13 according to Table 6.
8
d
SW4
SW5
SW6
OFF
ON
OFF
OFF
ON
OFF
ON
ON
e
SW7
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