Page 11
DEMAND
CAI
GAS VALVE
15
ON
OFF
38
IGNITOR
34
1
Pre -Purge Ignitor Warm-up
Trial for
Ignition
Post
Purge
5 SEC80
*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 O Time
Fan o time (time that the blower operates after the heat
demand has been satised) can be adjusted by moving
the jumper to a dierent setting. The unit is shipped with
a factory fan o setting of 90 seconds. For customized
comfort, monitor the supply air temperature once the heat
demand is satised. Note the supply air temperature at
the instant the blower is de-energized.
Adjust the fan-o 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 gure 5.
Cooling Fan On Time
The fan on time is 2 seconds and is not adjustable.
Cooling Fan O Time
The control has a 45 second fan o delay after cooling
demand has been met. This delay is factory set and not
adjustable.
‐
To adjust fan-off timing, reposition jumper across pins to
achieve desired setting.
NO JUMPER
60
90
120
180
60
90
120
180
60
90
120
180
60
90
120
180
60 Second
off Time
90 Second
off Time
120 Second
off Time
180 Second
off Time
FIGURE 5
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