andrews 32/143 Installation Manual, Operation And Service Manual page 87

Pilot Burner Removal
Step 1. With burner rack removed from heater, disconnect
pilot tube connection from gas valve
Step 2. Remove the two pilot burner mounting screws
securing the pilot and pilot shield in place.
Step 3. Remove pilot shield and pilot from burner rack.
Step 4. To install pilot burner and pilot shield, reverse above
procedure. Be sure to reconnect green ground wire.
Pilot Burner Inspection
Step 1. Inspect pilot for the following:
a) Broken or cracked ceramic insulators. If found,
pilot must be replaced.
b) Damaged electrode or flame sense wire. If found,
pilot must be replaced.
c) Oxidation build-up on flame rod. Clean flame rod
or replace pilot as necessary.
Step 2. Inspect pilot orifice:
a) Remove 7/16" ferrule nut from bottom of pilot.
b) Remove pilot tube and orifice from pilot.
c) Inspect pilot tube for blockage. Clean or replace
as necessary.
d) Inspect pilot orifice for blockage. Clean or replace
as necessary.
SERVICE PROCEDURE D24-IV
Removal and Inspection
Pilot Shield
Pilot & Pilot Shield
Mounting Screws
22
Pilot
Orifice
7//16"
ferrule
Nut
Page 33
87
APPENDICES
Main Burner & Pilot
Ground Wire
Location
Flame
Rod
Ceramic
Insulators
Ignition
Wire
Flame Sense
Wire
Aluminum
Pilot Tubing
21