Brant Radiant Heaters DX2 Series Manual page 57

DX2 Series
Check to make sure gas pressure is within minimum and
maximum inputs, as indicated on burner rating plate.
Is gas pressure OK?
Correct problem.
Were the gas lines purged of air?
Purge gas line.
Is the heater properly
grounded? Is the heater's
polarity correct?
No
Correct problem.
No
Yes
No
With micrometer, check
Yes
amperage at flame rod. Is it
greater than .7 microamps?
No
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.
Yes
Replace gas valve.
Confirm manifold pressure is
correct and/or gas orifice is not
plugged and is the correct size.
Check to make sure flame
Yes
sensor wire is OK. If so, then
replace circuit board.
57
5.0 Troubleshooting Guide