Filter
Top Products
SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
tnemtrapeD gniniarT lacinhceT81sretaeH retaW etatS
7002 © eessenneT ,ytiC dnalhsA
SBN /SBD30-150/199 SEQUENCE OF OPERATION
Sequence
1. Thermistors (probes) call for heat.
2. Inducer fan starts and provides draft.
3. Hot surface igniter = 20 sec. warm-up.
4. Main gas valve opens 4 sec. trial for
ignition. (Maximum 5 trials.)
5. Main burner ignites and proves.
6. Thermostat reaches the temperature
setting.
7. Main burners “OFF” - Auto restart after
60 min. - 20 sec blower
6
1
4
2
1
5 & 7
3