10
PREVENTIVE MAINTENANCE
Heat Wagon Construction Heaters are built to withstand the rigors of operating on construction
sites, for mining applications, and a multitude of other locations where heaters are used. To main-
tain the reliable performance required it is necessary to do a certain amount of regular maintenance.
1)
CHECK POWER CORD
A. Insulation not frayed or cracked.
B. Ground peg is there on male end.
C. Polarity is correct (Black wire on fuse, white wire on motor relay).
2)
CHECK ALL WIRING FOR TIGHT AND CORRECT CONNECTIONS
3)
CHECK MOTOR RELAY
A. If it buzzes, clean contacts or replace.
B. Check for voltage drop through L1 or T1 contacts if its more than 2 volts replace.
4)
CHECK AIR FLOW SWITCH
A. Blow out the inlet tube and negative pressure fitting.
B. Adjust the switch, light on control panel stays on if the heater is bumped and shuts off if
fan inlet is blocked off.
5)
CLEAN THE BURNER
A. Clean out port holes (Gas outlet).
B. Clean air mixture holes.
6)
CHECK IGNITER/SENSOR
A. Move sensor probe; if rubbery, replace.
B. If stiff; clean and re-gap at 1/8”
7)
CHECK FOR GAS LEAKS
A. Operate the heater, (with leak detector or soapy water) check all pipe connections
for leaks.
8)
TIGHTEN ALL BOLTS
A. Motor mounts
B. Fan blade
C. Burner mount
D. Pipe train mounts
Summary of Contents for 1800
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