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6.
The blower is in operation.
6.2.
Starting up the burner – Single volume
1.
Set the STOP/BLOWER/BURNER switch to BURNER.
2.
If the outside temperature is under 70°F, the outside temperature selector allows for the flame
safeguard relay to be energized.
3.
Authorization for pilot to ignite is complete when the low and high air pressure differential and high
temperature limit switches are closed.
4.
Then the burner starts.
5.
The MAXITROL series 14 controller modulates the burner to maintain the selected set point of the
temperature selector (TD114).
6.3.
Starting up the burner – Double volume
1.
Set the STOP/BLOWER/BURNER switch to BURNER.
2.
If the outside temperature is under 70°F, the outside temperature selector allows for the flame
safeguard relay to be energized.
3.
The burner then starts.
4.
ln low volume mode, the outside air damper is partially open to a predetermined position for the
desired airflow rate; the profile plate damper opens partially and modulates to maintain the required
air pressure difference across the burner.
5.
ln high volume mode, the outside air damper opens completely; the profile plate damper opens
wider and modulates its position in order to maintain the required air pressure difference across the
burner.
6.4.
Starting up the burner – Variable volume
1.
Set the STOP/BLOWER/BURNER switch to BURNER.
2.
If the outside temperature is under 70°F, the outside temperature selector allows for the flame
safeguard relay to be energized.
3.
The burner then starts.
4.
ln modulation, the outside air damper is partially open to a predetermined position for the desired
airflow rate; the profile plate damper opens partially and modulates to maintain the required air
pressure difference across the burner.
5.
In maximum air volume mode (10Vdc signal), the outside air damper opens completely; the profile
plate damper opens wider and modulates its position in order to maintain the required air pressure
difference across the burner.
7.
HEATER SHUTDOWN
7.1.
Extended shutdown
When the heater is shut down for an extended period, it is recommended that the gas and electric power
supply be shut off.
Before turning on the heater after an extended shutdown, make sure the air is purged from the gas pipes
and that the gas pressure is adequate. An inspection is recommended to make sure that everything is in
order.