Detroit Radiant Products Company SV Series - Manual (Page 17)

SV Series
17
Were the gas
lines purged of
air?
Check to make sure gas pressure is within
minimum and maximum inputs, as indicated on
burner rating plate. Is gas pressure OK?
Yes
No
Is the heater properly
grounded? Is the heater’s
polarity correct?
With microampmeter, check
amperage at flame rod. Is it
greater than .7 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.
Correct problem.
No
Yes
No
Purge gas line.
No
Confirm manifold pressure is
correct and/or gas orifice is not
plugged and is the correct size.
Check voltage at burner
control box during igniter
warm up. Is it at least 24V?
Yes
Yes
Use larger gauge wire.
No
Yes
Correct pressures.
4.0 Troubleshooting Guide