Brant Radiant Heaters AG2-20-65 Manual page 52

5.0 Troubleshooting Guide
Continued from page 50
After ignitor is
No
warmed up, does
gas valve open?
Yes
Does the burner
No
light?
Yes
Does the burner
No
stay on?
Yes
Does the heater
stay ON until a call
for heat ends?
No
Yes
Troubleshooting ends.
Test for 24V at valve opening period (usually 45 to 60 seconds
after power to heater). Is there 24V to valve for 8 seconds?
No
Replace circuit board.
Is the ball valve/
shut-off valve
Yes
in the ON position?
No
Turn on.
Does the burner stay on
for approx. 8 seconds
and then shut off?
No
Does the burner come
Yes
on and turn off
immediately
(1 or 2 seconds)?
The heater can shut down due to:
• Improper grounding.
• High winds.
• Taking combustion air from the attic.
• Dirty environment.
• Improperly positioned baffles.
• Fluctuating gas pressure.
Check to make sure gas pressure is within
minimum and maximum inputs, as indicated on
heater's rating plate. Is gas pressure OK?
No
Correct problem.
Check to make sure gas pressure
is within minimum and maximum
inputs, as indicated on heater's
rating plate. Is gas pressure OK?
52
AG2 Series
Yes
Pressure
switch may
be faulty or
Yes
there is a
restriction in
the exhaust.
No
Correct problem.
Yes
Yes