SECTION 11: O
PERATION
AND
M
AINTENANCE
47
SECTION 11: OPERATION AND MAINTENANCE
This heater is equipped with a direct spark ignition
system.
11.1 Se
q
uence of Operation
1. Turn the thermostat up. When the thermostat
calls for heat, the blower motor will energize.
2. When the motor approaches nominal running
RPM, the pressure switch closes and activates
the ignition module.
3. After a 45 second prepurge, the ignition module
then opens the gas valve and energizes the
spark igniter.
4. When the flame is established, the sparking
sequence ceases.
5. If the flame is not established during the ignition
sequence, the ignition module closes the gas
valve and purge begins. Module will try 2
additional times for ignition (with purges in
between trials). If ignition is not established, the
module will lockout.
6. If the flame extinguishes during operation, the
ignition module will attempt the multiple trial
sequence described in step 5. If ignition is not
re-established, the module will lockout for one
hour or until reset.
7. After lockout, the control can be reset by turning
down thermostat for five seconds, and then
raising it again to desired temperature, or by
disconnecting power and then reconnecting.
8. When thermostat is satisfied, all power to the
unit is shut off.
11.2 To Shut Off Heater
Set thermostat to lowest setting.
Turn OFF electric power to heater.
Turn OFF manual gas valve in the heater supply line.
11.3 To Start Heater
Turn gas valve and electric power OFF and wait five
minutes for unburned gases to vent from heater.
Turn ON main gas valve.
Turn ON electric power.
Set thermostat to desired temperature.
Burner should light automatically.
11.4 Pre-Season Maintenance and Annual
Inspection
To ensure your safety and years of trouble-free
operation of the heating system, service and annual
inspections must be done by a contractor qualified in
the installation and service of gas-fired heating
equipment.
Turn off gas and electric supplies before performing
service or maintenance. Allow heater to cool before
servicing.
Before every heating season, a contractor qualified in
the installation and service of gas-fired heating
equipment must perform a thorough safety
inspection of the heater.
Cut/Pinch Hazard
Wear protective gear
during installation,
operation and service.
Edges are sharp.
WARNING
Failure to follow these instructions can result in death, electric shock, injury or property damage.
Burn Hazard
Allow heater to cool
before service or
maintenance.
Tubing may still be hot
after operation.
Explosion Hazard
Turn off gas supply to
heater before service
or maintenance.
DANGER
Electrical Shock Hazard
Disconnect electric
before service or
maintenance.
Heater must be
connected to a properly
grounded electrical
source.
