Schwank SER(IR) - Manual (Page 19)

GP-MSER-BX-11A
SER / IR Manual
RD: March 2006
RL: 11A
KH
15. LIGHTING INSTRUCTIONS
16. RECOMMENDED MAINTENANCE
1. Inspect the venting system every heating season and repair or replace worn parts as required.
Check the inlet air opening and the blower periodically, and clean off any lint or foreign matter.
The flow of combustion and ventilation air must not be obstructed.
2. In addition, we recommend the entire system be checked once a year by a qualified service
technician.
THE TUBE HEATER BURNER IS COMPLETELY FACTORY ASSEMBLED AND
TESTED. ANY ALTERATION VOIDS THE CSA CERTIFICATION AND MANUFAC-
TURERS WARRANTY. FOR ADDITIONAL INFORMATION, CONTACT YOUR LOCAL
DISTRIBUTOR.
Page 15
3. With the blower pressure switch contact closed, the 30 second pre-purge cycle on the DSI
control is activated. The Spark is energized and the gas valve opens.
4. Once the flame sensor determines that there is a flame, the spark igniter is de-energized.
5. In the event ignition does not occur, the safety circuit will function to interrupt gas flow after
approximately 21 seconds and lock the system out. No further gas will flow until the power
has been manually interrupted for a period of 30 seconds. This will reset the ignition module
and the operating sequence will restart at step #3.
6. If the blower does not run, the blower pressure switch (normally open contact) does not close
and power is not supplied to the ignition control.
Refer to the lighting instructions on the outside cover of the burner housing. Again, if the unit
goes off on safety, main power to the unit must be manually interrupted for a 30 second reset
period before the heater can be restarted.
NOTE: On initial installation, the unit may lock out on safety owing to the length of time re-
quired to purge air from the system.