Brant Radiant Heaters AVS-40N Instructions Manual page 37

AVS Series
Check to make sure
gas pressure is within
minimum and maximum
inputs, as indicated
No
Correct problem.
Is the heater properly grounded?
Is the heater's polarity correct?
Check to make sure gas pressure is
within minimum and maximum inputs as
indicated on the heater's rating plate.
Is gas pressure OK?
Yes
Pressure switch may be faulty or there
is a restriction in the exhaust. Remove
restriction or replace pressure switch.
Replace gas valve.
Yes
No
Yes
No
problem.
One or both of the flame sensing rods are faulty or flame is
weak. Check to make sure heater is operating at proper gas
pressure as indicated on the heater's rating plate.
If needed, replace one or both flame sensing rods.
37
5.0 Maintenance •
With microampmeter, check
DC ampperage at flame rods.
Is it 1.0 microamps?
No
Check to make sure both flame
Correct
sensor wires are OK and then
replace circuit board.
Troubleshooting Guide
Yes