Hired-Hand Universal Ray Tube Heaters: AG1 Series - Manual (Page 17)

NOTICE Bypassing any switch is intended for testing purposes only. Do not leave switch bypassed
during normal operation or the heater’s built-in safety mechanisms will be compromised.
17
4.0 Troubleshooting Guide AG1 Series
Check to make sure gas pressure is within minimum and
maximum inputs, as indicated on burner rating plate.
Is gas pressure OK?
Were the gas lines purged of air?
Is the heater properly
grounded? Is the heater’s
polarity correct?
With micrometer, check
amperage at flame rod. Is it
greater than .4 microamps?
Check to make sure flame
sensor wire is OK. If so,
then replace circuit board.
Sensing rod is faulty or flame
is weak. Check to make sure
heater is operating at proper
gas pressure as indicated on
burner rating plate and then, if
needed, replace sensing rod.
Replace gas valve.
Yes
Correct problem.
Correct problem.
No
No
Yes Yes
No
Purge gas line.
No
Yes
Confirm manifold pressure is
correct and/or gas orifice is not
plugged and is the correct size.