Hired-Hand Universal Ray Tube Heaters: AG2 Series Rev.10-08 - Manual (Page 16)

16
4.0 Troubleshooting Guide
Continued from page 14.
AG2 Series
After ignitor is warmed up, does gas
valve open (low light illuminates)?
Test for 24V at valve opening period (usually 30 to 45 seconds
after power to heater). Is there 24V to valve for 8 seconds?
Replace circuit board.
Does The
burner light?
Does the burner
stay on?
Is the ball valve/
shut-off valve
in the ON position?
Check to make sure gas pressure is within
minimum and maximum inputs, as indicated on
the heater’s rating plate. Is gas pressure OK?
Does the burner stay on
for approx. 8 seconds
and then shut off?
Does the burner come
on and turn off
immediately
(1 or 2 seconds)?
Check to make sure gas pressure
is within minimum and maximum
inputs, as indicated on the heater’s
rating plate. Is gas pressure OK?
Pressure
switch may
be faulty or
there is a
restriction in
the exhaust.
Does the heater
stay ON until a
call for heat ends?
Troubleshooting ends.
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.
No
Yes No
No Yes
Yes
No
Correct problem.
Yes
Yes
Yes
No
Yes
No
Yes
No
Yes
No
Turn on.
Yes
Correct problem.
No