Preventive Maintenance - Heat Wagon 1800B Manuel D'installation Et D'entretien

POWER
FUSE
MOTOR
AIR SWITCH
GAS LOW
GAS HIGH
BURNER FAILURE
Heat Wagon Construction Heaters are built to withstand the rigors of operating on construction sites, for mining appli-
cations, and a multitude of other locations. To maintain 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 neutral block).
2) CHECK ALL WIRING FOR PROPER CONNECTIONS
3) CHECK MOTOR RELAY
A. If it buzzes, clean contacts or replace.
B. Check for voltage drop through 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
CONTROL BOX TROUBLESHOOTING LIGHTS
LIGHT ON
Power to Unit
Fuse Good
Power to Motor Relay
Switch Closed When
Fan Running Good
Thermostat calling for
First Stage Heat
Thermostat calling High Heat
Failure to Light Burner
Check Ignitor and Flame Sensor
Check High Limit
Check Gas Pressure
Check Manifold Pressure
PREVENTATIVE MAINTENANCE
LIGHT OFF
Check Power Source
Replace Fuse
No Power to Motor Relay
No Power Going Through
Switch - Switch Open
Check & Adjust With
Fan Running
Check Thermostat
and High Limit
Check Thermostat
No Problems
5) CLEAN THE BURNER
A. Clean out the 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 regap igniter 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
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