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1. The area surrounding the heater shall be kept clear
and free from combustible materials, gasoline, and
other flammable vapors and liquids.
2. Have your gas supplier check all gas piping annually
for leaks or restrictions in gas lines.
3. Regulators must be periodically inspected to make
sure the regulator vents are not blocked. Debris,
insects, insect nests, snow, or ice on a regulator can
block vents and cause excess pressure at the
appliance.
4. Regulators can wear out and function improperly.
A. General
Burn Hazard
■
Heater surfaces are hot for a period of time after
shutdown.
■
Allow heater to cool before servicing.
■
Failure to follow this warning can result in burns.
Fire and Explosion Hazard
■
Do not disassemble or attempt to repair any heater
component, including gas hose and regulators.
■
All components must be replaced if defects are found.
■
Failure to follow this warning will result in fire or
explosions leading to property damage, serious injury,
or death.
1. Close fuel supply valves to heater and allow heater to
burn off remaining fuel in its hose before servicing,
unless it is necessary to have the valves open for the
service procedure.
2. Clean the heater's orifices with compressed air or a
soft rag. Do not use files, drills, broaches, etc. to
clean the orifice hole. Doing so will enlarge the hole,
causing ignition or combustion problems. Replace
the orifice if it cannot be cleaned properly.
3. Reverse the respective ser vice procedure to
reassemble. Ensure gas connections are tightened
securely.
4. After repair, light the heater. Check for proper
operation and for gas leaks.
B. Initial Preparation
1. Remove burner retaining bolt from heater base.
2. Disconnect electrode lead from igniter if necessary.
WARNING
WARNING
Maintenance Instructions
Have your gas supplier check the date codes on all
regulators installed and check delivery pressures to
the heater to make sure that the regulator is reliable.
5. Review all heater markings (warnings, start-up, shut-
down, etc.) at the time of maintenance for legibility.
Make sure none are cut, torn, or otherwise damaged.
Any damaged markings must be replaced
immediately by contacting the L.B. White Co., Inc.
Dataplates, start-up and shut-down instructions and
warnings are available at no cost.
Service Instructions
3. Pull burner assembly from case.
C. Burner Orifice Removal
1. Disconnect compression nut from brass elbow and
thermocouple from pilot control valve. See Fig. 4.
2. Carefully reposition pilot line and thermocouple away
from safety control valve.
3. Disassemble the following: See Fig. 5.
-- Pilot control with manual valve from burner
orifice
-- Burner orifice from burner casting
4. Clean the burner orifice.
FIG. 4
FIG. 5
BURNER
VALVE
D. Pilot Orifice
COMPRESSION
NUT
ELBOW
THERMOCOUPLE
PILOT LINE
BURNER ORIFICE
ELBOW
VALVE
10
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