Thermon HELLFIRE 400, Installation, Operation & Maintenance Instructions Manual

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C. PRE-OPERATION INSPECTION
C.1 Important Notices
To ensure trouble free operation during the winter months,
inspect the system annually at the start of the season.
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.
Gas leaks shall be repaired immediately or, gas
supply valve closed until repairs can be made.
All work performed on railway property must
be carried out in accordance with local railway
authorities instructions.
CAUTION
CAUTION. Do not operate this machine until it has
been installed and commissioned according to
requirements specified in the installation section
of this manual.
NOTE:
Perform inspection and operations in accordance with
the instructions provided in the service section of this
manual.
NOTE:
This inspection guide assumes that all applicable
service bulletins have been implemented on the heater
being inspected.
NOTE:
The outcome of any inspection items that differ from
that expected indicates further service is required.
C.2 Prior to Heater Start-Up
Table 1 – Heater Inspection List
Inspect Action
Condition of all ducting, particularly any flex
ducts
Repair or replace damaged ductwork.
Inside of all tie duct and cross ducts Remove any blockages, such as debris and mud.
Track duct vents
Close vents that do not direct air at tie plates or rods.
Set vent openings to 1/8” - 1/4” maximum.
Track duct mounting
Verify track ducts do not interfere with normal movement of the switch
points and do not interfere with the signal system.
Flame rod and spark igniter
Remove and visually inspect for cracks in the ceramic, and evidence of soot.
Replace any with cracked ceramic.
If evidence of soot is found, clean rod and investigate condition of burner,
gas manifold, and inspect tie duct, cross ducts and air intake for blockage.
Flame rod and ignition wires
Inspect boot for degradation, cracks and poor seals. Replace if necessary.
Inspect connectors for signs of corrosion. Clean connections, or replace wire
if necessary.
Combustion chamber Verify it is clear of any obstructions or debris, ie. animal nests.
Cycling and high limit thermostat installation
Verify thermostats are fastened and are in full contact with duct surface.
Replace any with damaged wire insulation.
Verify thermostat enclosure is sealed and dry inside.
Service surge protection Verify electric service has functioning surge protection.
Air switch port and vent Remove any obstruction.
DSI control module Verify it is installed.