46
46
Se
rv
ic
e
1.
Inspect heater annually.
2.
Ensure the air intake and all ductwork are not obstructed.
3.
Keep area around heater clear and free from combustible
material, gasoline and other flammable vapours and liquids.
4.
Replace all damaged ducts, including intake, crossducts,
point and track duct nozzles.
5.
Damaged ducts will degrade switch clearing ability.
6.
With the supply power turned off, tighten all mounting and
electrical connections to the recommended tightening torque.
Thread Size
Tightening
Torque (in./lbs)
8 - 32
19
10 - 32
31
1/4 - 20, Power Terminal Lugs and AAR Terminals
75
J.2 Gas Supply Pressure
WARNING
WARNING.
All persons employed in handling propane
or natural gas shall be trained in proper handling and
operating procedures, as required by local authorities
having jurisdiction.
1.
Heater is factory tested on propane at 10 psi supply
pressure.
2.
With the heater on and all connected loads operating,
verify that the supply pressure, indicated on supply
pressure gage (7), is between 5 - 20 psi.
3.
Natural gas pressures below 5 psi or LPG pressures
below 2 psi will limit the maximum capacity of the heater.
J.3 Gas Supply Leak Test
1.
With the heater “OFF”, paint all the gas pipe connections
between the supply inlet (6) to the gas source with leak
testing solution. If a gas leak is detected, replace any
cracked fittings or components, tighten any leaking pipe
connection, or disassemble, reapply pipe thread sealant,
and reassemble.
J.4 Manifold Leak Test
1.
With the heater “OFF”, paint all the gas pipe connections
between the main (8), pilot (3) gas solenoid valves and
the supply inlet (6) with leak testing solution.
2.
With the heater operating in “MANUAL” mode and the
burner lit, paint all pipe connections between the main
and pilot gas solenoid valves to the elbow with leak test
solution.
3.
If a gas leak is detected, turn heater “OFF”. Replace any
cracked fittings or components, tighten any leaking pipe
connection, or disassemble, reapply pipe thread sealant,
and reassemble.
Summary of Contents for Hellfire 900
Page 26: ...26 26 Figure 3 155 Clearance Figure 2 140 Clearance Installation...
Page 27: ...27 27 Figure 4 155 Clearance Turned 90 Degrees Installation...
Page 37: ...37 37 Heater Specifications THERMON HEATING SYSTEMS INC H 9 SchematicsMaintenance...
Page 38: ...38 38 Heater Specifications THERMON HEATING SYSTEMS INC...
Page 39: ...39 39 Heater Specifications THERMON HEATING SYSTEMS INC...
Page 40: ...40 40 Heater Specifications THERMON HEATING SYSTEMS INC...
Page 41: ...41 41 Heater Specifications THERMON HEATING SYSTEMS INC...
Page 42: ...42 42 Heater Specifications THERMON HEATING SYSTEMS INC...
Page 54: ...54 54 NOTES...
Page 55: ...55 55 NOTES...
