Troubleshooting Guide - Brant Radiant Heaters HLV Series Instructions For Intallation

5.0 Maintenance • Troubleshooting Guide
HLV Series Troubleshooting Guide
Turn up thermostat
Does the exhauster
fan turn on?
Yes
Does the ignitor warm
up and glow red?
Yes
After the ignitor is fully
energized, does the gas
valve open?
Yes
Correct problem.
Continued on page 48
Find the source of the
electrical problem
No
Is the power at the
No
exhauster 120V/220V?
Is power at the burner
No
control box 120V/220V?
No
Find the source of the
electrical problem.
Test for 24V at valve opening period (usually 5 seconds after
No
power to the burner control box). Is there 24V at the valve?
Check to confirm gas pressure is
within minimum and maximum inputs
as indicated on the heater's rating
plate. Is gas pressure OK?
No
Replace gas valve.
Find the source of the electrical
problem between the thermostat
transformer, thermostat and panel.
Is the thermostat supplying 24V
Yes
to the exhauster control panel?
Yes
24V to the terminal plug on the
Find the source of the electrical
problem between the thermostat
transformer, thermostat and panel.
Yes No
Replace the pressure switch
after verifying:
• Baffle(s) are in the radiant tube
furthest from the burner.
Yes
• Heater, fan blowers ,squirrel cage,
intake and exhaust are clean and
free from dirt and obstructions.
• The 4" air intake pipe does not
exceed 20 ft. and/or 2 elbows.
• There is not a negative pressure
experienced at the area of air
intake (e.g.; high winds, attic
space, tightly sealed building).
46
HLV Series
No
Is the thermostat supplying
burner control box?
No
Replace circuit board
and/or wiring harness.
Yes
Yes