Elbows and Intersections. Brant Radiant Heaters HLV-170, HLV-80, HLV-50, HLV-90, HLV-140, HLV-60, HLV-100, HLV-175, HLV-75, HLV-180

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Elbows and Intersections. Brant Radiant Heaters HLV-170, HLV-80, HLV-50, HLV-90, HLV-140, HLV-60, HLV-100, HLV-175, HLV-75, HLV-180 | Manualzz

5.0

Maintenance • Troubleshooting Guide

HLV Series Troubleshooting Guide

Turn up thermostat

Find the source of the electrical problem

Does the exhauster fan turn on?

Yes

No

No

Is the power at the exhauster 120V/220V?

Yes

HLV Series

Find the source of the electrical problem between the thermostat transformer, thermostat and panel.

No

Is the thermostat supplying 24V to the exhauster control panel?

Yes

Does the ignitor warm up and glow red?

Yes

No

Is power at the burner control box 120V/220V?

No

Find the source of the electrical problem.

Yes

Is the thermostat supplying

24V to the terminal plug on the burner control box?

Yes

No

Find the source of the electrical problem between the thermostat transformer, thermostat and panel.

After the ignitor is fully energized, does the gas valve open?

Yes

No

Test for 24V at valve opening period (usually 5 seconds after power to the burner control box). Is there 24V at the valve?

Yes

No

Replace circuit board and/or wiring harness.

Check to confirm gas pressure is within minimum and maximum inputs as indicated on the heater’s rating plate. Is gas pressure OK?

No

Correct problem.

Yes

Replace gas valve.

Replace the pressure switch

after verifying:

• Baffle(s) are in the radiant tube

furthest from the burner.

• 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).

Continued on page 48

46 47

HLV Series

5.0

Maintenance • Troubleshooting Guide

*

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.

The exhauster is faulty and must be replaced.

A faulty relay may exist in the panel assembly. Consult factory.

Yes Yes

Is the panel supplying

120V/220v to the exhauster?

No

Is there 24V on the secondary side of the transformer located in the panel assembly?

No

Replace transformer.

Is the ignitor physically damaged?

Yes

Replace ignitor.

Repair wiring or hose connections.

No

Check voltage during ignition sequence (usually 5 seconds after power to burner control box). Is it 24V?

No

Remove obstruction.

Yes

Is the resistance through the ignitor 1 to 6

?

Is the inlet or the outlet of the unit obstructed?

Yes

No

No

Yes

Replace faulty wiring.

No

Is there 24V between

L1 and ground at the circuit board?

Yes

No

Yes

Replace circuit board.

Check for loose wiring or restrictions in hose connections to the pressure switch. Are they OK?

No

Is there 24V on the secondary side of the transformer in the burner control box?

No

Yes

Replace ignitor.

Replace faulty wiring.

*

Temporarily place a jumper across the terminal of the safety pressure switch.

Set control box cover in place.

Does the ignitor glow red?

Yes

No

Adjust dampers until proper box pressures are achieved.

Replace faulty transformer. Note: The original transformer is equipped with an automatic resetting fuse. Confirm fuse has not been tripped.

Yes

After the system has run for 20 minutes in high fire mode, measure box pressures using a manometer with an adequate range.

Do the setpoints correspond with Chart 4.2 on page 44?

47

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