L.B. White 225 Workman - Manual (Page 11)

1. Straighten the mounting bracket tabs and remove
thermocouple from safety control valve.
2. Remove the jam nut securing the safety control valve
to its mounting bracket.
3. Pull the safety control with manifold from heater.
4. Replace or clean components as needed.
FIG. 6
FIG.7
1. Close the fuel supply valve to the heater before
s e r v i c i n g u n l e s s n e c e s s a r y fo r yo u r s e r v i c e
procedure.
2. Disconnect the thermocouple from the safety control
valve when servicing either the pilot saftey control
valve or the burner orifice manifold.
3. Remove the heater’s barrel for access to burner
related components.
4 Disconnect the gas hose if needed for the service
procedure.
5. For reassembly, reverse the respective service
procedure. Ensure gas connections are tightened
securely.
6. After servicing, start the heater to ensure proper
operation and check for gas leaks.
7. Clean the heater’s orifice manifold with compressed
air or a soft, dry rag. Do not use files, drills, etc.,
which may enlarge the holes, causing combustion
problems or burner flame extending outside of the
case barrel. Replace the manifold if its holes cannot
be cleaned properly.
WARNING
Burn Hazard
■
Heater surfaces are hot for a period of time after the
heater has been shut down.
■
Allow the heater to cool before performing service,
maintenance, or cleaning.
■
Failure to follow this warning will result in burns
causing injury.
11
Service Instructions
GENERAL
WARNING
Fire and Explosion Hazard
■
Do not disassemble or attempt to repair any heater
components or gas train components.
■
All component parts must be replaced if defects are
found.
■
Failure to follow this warning will result in fire or
explosions, causing property damage, injury, or death.
SAFETY CONTROL VALVE/VARIABLE RATE
VALVE/BURNER ORIFICE MANIFOLD
JAM NUT
BRACKET
SAFETY
VALVE
ORIFICE
MANIFOLD
VARIABLE RATE
VALVE