Maintenance Instructions; Service Instructions; General - L.B. White SENTINEL AT 150 Owner's Manual And Instructions

1. Have your gas supplier check all gas piping annually
for leaks or restrictions in gas lines. Also, at this time
have your gas supplier clean out the sediment trap on
the zone control panel of any debris that may have
accumulated.
2. The heater's surrounding area shall be kept clear
and free from combustible materials, gasoline, and
other flammable vapors and liquids.
3. Regulators can wear out and function improperly.
Have your gas supplier check the date codes on all
regulators installed and check delivery pressures to
the appliance to make sure that the regulator is
suitable for continued use.
4. 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.
5. For safety as well as for optimum performance at the
heater, it is necessary to keep the outside of the
heater free of dust, dirt or any combustible material.
If any operational component shows signs of rust or
corrosion, replace the component immediately.
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.
■
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.

Maintenance Instructions

6. If any warning or instruction labels, dataplates, etc.
become lost or hard to read, replace them
immediately. Do not operate the heater until you
have all instructions and can read and understand
them.
7. Check overall condition of heater for cracked or
damaged components, loose screws or bolts,nicked
or cut electrical leads, etc. Replace any suspect
components.
8. Check all hose and tubing assemblies for cracks,
abrasions or ruptures. Replace any hoses that are
suspect.
9. Ensure relfector supports and hangers are secure,
reflectors do not sag, and are properly located.
10. Check all gasketing on burner box and fan housing
discharge. Ensure all is in good condition. Replace
any gasket material if suspect.
11. At least once a year, check the air inlet assembly.
Ensure the air inlet assembly and its duct are free of
blockages.

Service Instructions

1. Close the fuel supply valve to the heater and
disconnect the heater's electrical supply before
servicing unless it is necessary to have the valve
open and electrical supply connected for your service
procedure.
2. Open the burner box for access to control
components. Close and latch after servicing.
3. For reassembly, reverse the respective service
procedure. Ensure gas connections are tightened
securely.
4. Clean the heater's burner orifice and pressure switch
orifices with compressed air or a soft, dry 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.
5. Disconnect appropriate component electrical leads
when servicing.
5. After servicing, light the heater to ensure proper
operation and check for gas leaks.

GENERAL

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