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Section 18 - Service / Maintenance
Air Pre-Heater Diaphragm
Replacement
1.
Remove the four hex cap screws from
the diaphragm assembly and discard.
2.
Disassemble and discard diaphragm,
spring and o-ring .
3.
Thoroughly clean remaining parts.
4.
Re-assemble using new diaphragm,
o-ring, spring and hex cap screws.
Air Pre-Heater Nozzle Cleaning /
Replacement
1.
Periodic cleaning of the nozzle assem-
bly may be required.
2.
Carefully remove nozzle from the air
pre-heater block.
3.
Disassemble the nozzle as shown and
clean thoroughly. Re-assemble nozzle.
4.
Carefully remove the quad ring from
the block and inspect. Replace if neces-
sary.
5.
Insert clean/new quad ring into the air
pre-heater block.
NOTE:
The quad ring
must be properly seated. Failure to
properly seat the quad ring may result
in leakage and improper burner opera-
tion.
DO NOT INSTALL QUAD RING ON
THE NOZZLE.
6.
Lubricate pin/seat and re-install nozzle.
Tighten securely.
Air Pre-Heater Diaphragm Assembly
Air Pre-Heater Nozzle Assembly
Proper Quad Ring Position
diaphragm
fuel orifice
body
pin/seat
nozzle assembly
quad ring
piston
spring
hex cap
screws
o-ring
!
Failure to properly seat the
quad ring may result in leak-
age and improper burner
operation. DO NOT INSTALL
QUAD RING ON THE NOZZLE.