46
46
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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 15 in/w.c
supply pressure.
2.
With the heater on and all connected loads operating,
verify that the supply pressure, indicated on supply
pressure gage (8), is between 12 - 20 in/w.c.
3.
Natural gas pressures below 12 in/w.c or LPG
pressures below 7 in/w.c 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.
J.5
Combination Gas Valve Seat Leak Test
1.
Turn heater OFF.
2.
Verify supply pressure is between 14 – 20 inches water column.
3.
Close the manual shut off on top of valve (7). Close
the supply manual shutoff external to heater, typically
mounted on the gas line riser.
4.
After 10 minutes there should be no decrease of
pressure on the supply pressure gauge. If there
is, refer to the Honeywell gas valve manual in the
component bulletin section at the end of this manual,
for service information.
J.6
Dirt Trap And Strainer
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.
If a dirty supply line is suspected, turn off the local gas supply,
remove the dirt trap cap and inspect for dirt and moisture.
2.
If a strainer is installed, remove center plug and
inspect for blockage. If evidence is found, locate
source and correct problem.
3.
If the strainer screen is clogged, remove the cap
and screen. Old gasket is not reusable. Clean screen.
Apply sealant to plug threads. Reinstall cleaned
screen, cap with new gasket, and plug.
4.
Inspect manifold and clean if necessary.
5.
Empty cap of any dirt or moisture. Apply thread
sealant and reinstall cap.
6.
Turn on gas supply and leak test dirt trap.
7.
Perform Combination Gas Valve Leak Test to ensure
valve seats seal.
Summary of Contents for HELLFIRE 400
Page 26: ...26 26 Installation Figure 2 140 Clearance Figure 3 155 Clearance...
Page 27: ...27 27 Installation Figure 4 Clearance Turned 90 Degrees...
Page 39: ...39 39 THERMON HEATING SYSTEMS INC Heater Specifications...
Page 40: ...40 40 THERMON HEATING SYSTEMS INC Heater Specifications...
Page 41: ...41 41 CCI THERMAL TECHNOLOGIES INC Heater Specifications...
Page 42: ...42 42 THERMON HEATING SYSTEMS INC Heater Specifications...
Page 54: ...54 54 NOTES...
Page 55: ...55 55 NOTES...
