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Technical Training Department ©2003
Ashland City, Tennessee
SBN TANK TYPE COMMERCIAL GAS WATER HEATER
SERVICE HANDBOOK
TEST 10 - MAIN BURNER IGNITION FOR LESS THAN 5 SECONDS
Conditions:
Power On – plug connected
Main Burner ignites for approximately 5 seconds then goes out.
Tests 8 and 9 completed
Note flash code on ignition board LED.
TEST 10
Flame Prover Circuit Check
If… ...then
no extended
main burner igntion
check wiring and plug connections of HSI assembly
plug and ignition board receptacles E1, Pin 2
check that HSI assembly is not cracked or dirty
check that flame prover will be in main flame
replace HSI assembly
still no extended
main burner ignition replace ignition control board
Main Burner
Hot Surface Igniter
(Illustration of low NOx burner)
E1, Pin 2 - From Flame Proving Rod
Pin 2