Service Instructions; Workman 225 Plus - L.B. White 320 Owner's Manual And Instructions

Service Instructions

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.
WARNING
Fire and Explosion Hazard
■ Do not disassemble or attempt to repair any
heater components or gas train components
such as gas valves, or gas hoses.
■ All component parts must be replaced if defects
are found.
■ Failure to follow this warning will result in fi re or
explosions, causing property damage, injury, or
death.
1. Close the fuel supply valve to the heater before
servicing.
2. Disconnect the thermocouple from the safety
control valve when servicing either the pilot safety
control valve or the burner orifi ce.
3. Workman 225 Plus and Workman 100
Plus NG: Remove the heater's barrel for access
to burner related components.
Norseman 200 Plus and Norseman
250: Remove the 7/16 in. burner retaining screw
from underside of case and pull the burner from
the case when servicing burner 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 and leak checked before lighting the
heater.
6. Clean the heater's orifi ce with compressed air or
a soft, dry rag. Do not use fi les, drills, etc., which
may enlarge the holes, causing combustion prob-
lems or burner fl ame extending outside of the case
barrel. Replace the component if its holes cannot
be cleaned properly.
Vertical Convection Heaters
Owner's Manual • Workman & Norseman

WORKMAN 225 PLUS

Burner Manifold/ Orifi ce and Safety
Control valve. See Figs. 11 and 12.
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. 11
BRACKET
FIG. 12
SAFETY VALVE
VARIABLE
RATE
VALVE
19
THERMOCOUPLE
JAM NUT
ORIFICE
MANIFOLD