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•
Removing Nozzle Line for Service
ence the Replacement Parts Diagram.)
Correct Nozzle and Flow
WARNING
!
Rate Required
Incorrect nozzles and fl ow rates
could result in impaired combus-
tion, under-fi ring, over-fi ring, soot-
ing, puff-back of hot gases, smoke
and potential fi re or asphyxiation hazards.
Use only nozzles having the brand, fl ow rate (gph), spray
angle and pattern specifi ed by the appliance manufactur-
er or Beckett Residential Burner OEM Spec Guide, Part
#6711.
Follow the appliance manufacturer's specifi cations for the
required pump outlet pressure for the nozzle, since this
affects the fl ow rate.
•
Nozzle manufacturers calibrate nozzle fl ow rates
at 100 psig.
•
This burner utilizes pressures higher than 100
psig, so the actual nozzle fl ow rate will be greater
than the gph stamped on the nozzle body. (Exam-
ple: A 1.00 gph nozzle @ 140 psig = 1.18 gph)
For typical nozzle fl ow rates at various pressures see ac-
companying chart.
1.
Before proceeding, turn off the main power
switch to the burner.
2.
Remove the burner cover by loosening the four
thumb screws (two on each side of burner).
3.
Disconnect the copper connector tube assembly
from the nozzle line bulkhead fi tting.
4.
Loosen the two screws securing the igniter re-
taining clips and rotate both clips to release the
igniter baseplate. The igniter should pop up and
be supported by the prop spring.
5.
Loosen the two screws securing the rear door.
Swing the door to the right and down.
6.
Loosen the splined nut.
7.
Remove the nozzle line electrode and head
assembly from the burner by drawing it straight
back and out the rear door opening. The adjust-
ment mechanism is still attached. Be careful not
to damage the electrodes or insulators while
handling.
8.
To replace the nozzle assembly, reverse the
above procedure.
RWB 6104 BNX
Perform Regular Maintenance
(Refer-
•
Nozzle Installation
CAUTION
!
!
A damaged nozzle could cause impaired com-
bustion, sooting, puffback of hot gases, smoke,
oil leakage and potential fi re or asphyxiation
hazards.
•
Use care when handling, removing and installing oil
nozzles.
•
Carefully follow the guidelines provided in this sec-
tion.
Perform the following steps when replacing a nozzle.
1.
Remove the nozzle line assembly to gain ac-
cess to the nozzle.
2.
Use a 3/4" open-end wrench to hold the nozzle
adapter. DO NOT attempt to remove or replace
the nozzle without securing the adapter, as
nozzle alignment could be seriously affected.
3.
Do not squeeze the electrodes when handling
the nozzle line assembly. Excessive force could
change the electrode tip settings or damage the
ceramic electrode insulators.
Table 8. Nozzle Flow Rate by Size
Nozzle fl ow rate U. S. gallons per hour of No. 2 fuel oil when
pump pressure (psig) is:
Nozzle
size
(rated
at 100
psig)
0.45
0.40
0.56
0.50
0.67
0.60
0.73
0.65
0.84
0.75
0.95
0.85
1.01
0.90
1.12
1.00
1.23
1.10
1.34
1.20
1.39
1.25
1.51
1.35
1.68
1.50
1.84
1.65
1.75
Protect Nozzle from
Damage
125
140 psi
150
psi
(factory
psi
std.)
0.47
0.49
0.59
0.61
0.71
0.74
0.77
0.80
0.89
0.92
1.01
1.04
1.07
1.10
1.18
1.23
1.30
1.35
1.42
1.47
1.48
1.53
1.60
1.65
1.77
1.84
-
-
-
-
-
175
200
psi
psi
0.53
0.56
0.66
0.71
0.79
0.85
0.86
0.92
0.99
1.06
1.13
1.20
1.19
1.27
1.32
1.41
1.46
1.56
1.59
1.70
1.65
1.77
1.79
-
-
-
-
-
-
-
Page 19
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