57
Call 1-
800-347-9575
for Technical Support
8.5.5 Nozzle Line Assembly Cleaning
How often?
Once per year or if the nozzle becomes blocked with debris (if blocked, a higher operating fuel
pressure will be seen on the pump pressure gauge).
Tools Required:
7/16 in., 1/2 in., 3/4 in. and 17mm (boxed end/12-pt.) wrenches, 5/8 in. socket/ratchet, 5/8 in.
wrench, 1/4 in. nut driver, hex wrench, vise, flat-blade screwdriver, small wire brush or pipe
cleaner (from optional maintenance accessory brush kit), parts washer fluid, shop air gun,
safety glasses, rubber gloves.
Replacement Parts:
Nozzle O-ring (PN 20213152) or Nozzle (PN 20210123 for EL-200B, PN 20210124 for
EL375B/EL500B)
Personally verify that the main power is turned off and locked out at the circuit
breaker.
Procedure - All Models (Refer to figures):
1. Wear all safety equipment.
2. Remove the burner from the boiler (refer to previous sections).
3.
Using a 7/16” wrench, disconnect the fuel and air tubing from the Nozzle Block.
4. Using a 17mm boxed-end/12-pt.wrench, remove the knurled nuts from the Nozzle Block
(refer to figure).
5. Using a flat-blade screwdriver, loosen the Ignition Transformer screws, and lift the
Ignition Transformer back on its hinge.
Flare and knurled
nuts. Loosen fuel and
air tubing
connections from
nozzle assembly.
Ignition
Transformer
Loosen screws and
swing up the
transformer.
Disconnect 2-pin
connector
(underneath).
Disconnect Nozzle Block
