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DEMAND
CAI
GAS VALVE
15
ON
OFF
38
IGNITOR
34
1
Pre -Purge
Ignitor Warm-up
Trial for
Ignition
Post
Purge
5 SEC
80
*Blower on time will be 30 seconds after flame is sensed. Blower off time will depend on “OFF TIME” Setting.
INDOOR BLOWER
Blower “On”*
Delay
ELECTRONIC IGNITION
FIGURE 4
Fan Time Control
Heating Fan On Time
The fan on time of 30 seconds is not adjustable.
Heating Fan Off Time
Fan off time (time that the blower operates after the heat
demand has been satisfied) can be adjusted by moving
the jumper to a different setting. The unit is shipped with
a factory fan off setting of 90 seconds. For customized
comfort, monitor the supply air temperature once the heat
demand is satisfied. Note the supply air temperature at
the instant the blower is de-energized.
Adjust the fan-off delay to achieve a supply air tempera
-
ture between 90° - 110° at the instant the blower is de-en
-
ergized. (Longer delay times allow for lower air tempera
-
ture, shorter delay times allow for higher air temperature).
See figure 5.
Cooling Fan On Time
The fan on time is 2 seconds and is not adjustable.
Cooling Fan Off Time
The control has a 45 second fan off delay after cooling
demand has been met. This delay is factory set and not
adjustable.
HEAT FAN
‐
OFF TIME IN SECONDS
To adjust fan-off timing, reposition jumper across pins to
achieve desired setting.
NO JUMPER
60 90
12
0
180
60 90
12
0
180
60 90
12
0
180
60 90
120 18
0
60 Second
off Time
90 Second
off Time
120 Second
off Time
180 Second
off Time
FIGURE 5
