7
Example with the RL 38/2 Model
Boiler output = 912 MBTU/hr - efficiency 80 %
Output required by the burner =
912 / 0.8 = 1140 MBTU/hr
1140 / 2
= 570 MBTU/hr per nozzle
therefore, two equal, 60°, 174 PSI nozzles are
required:
1° = 3.00 GPH with 2° = 3.00 GPH,
or the following two different nozzles:
1° = 3.50 GPH with 2° = 2.50 GPH,
or:
1° = 2.50 GPH with 2° = 3.50 GPH.
NOZZLE ASSEMBLY
At this stage of installation the burner is still disassem-
bled from the blast tube; it is now possible to fit two
nozzles, after having removed the plastic plugs 2)(A),
inserting the wrench through the central hole in the
flame stability disk. Do not use any sealing products
such as gaskets, sealing compound, or tape. Be care-
ful to avoid damaging the nozzle sealing seat. The
nozzles must be screwed into place tightly but careful-
ly.
The nozzle for the low fire of operation is the one lying
beneath the firing electrodes Fig. (B).
Make sure that the electrodes are positioned as shown
in Figure (B).
Finally remount the burner 4)(C) to the slide bars 3)
and slide it up to the flange 5), keeping it slightly raised
to prevent the flame stability disk from pressing
against the blast tube.
Tighten the screws 2) on the slide bars 3) and screw
1) that attaches the burner to the flange.
If it proves necessary to change a nozzle with the
burner already fitted to the boiler, proceed as outlined
below:
- Retract the burner on its slide bars as shown in fig.
(B)p.6.
- Remove the nuts 1)(D) and the disk 2).
- Use wrench 3)(D) to change the nozzles.
COMBUSTION HEAD SETTING
The setting of the combustion head depends exclu-
sively on the delivery of the burner at high fire - in
other words, the combined delivery of the two nozzles
selected on page 6. Turn screw 4)(E) until the notch
shown in diagram (F) is level with the front surface of
flange 5)(E).
Example:
The RL 38/2 Model with two 3.00 GPH nozzles and
174 PSI pump pressure.
Find the delivery of the two 3.00 GPH nozzles in table
(C), page 6:
4 + 4 = 8 GPH.
Diagram (F) indicates that for a delivery of 8 GPH the
RL 38/2 Model requires the combustion head to be
set to approx. three notches, as shown in Figure (E).
(A)
(C)
(D)
(E)
SETTING THE COMBUSTION HEAD
(F)
N° Notches
Fuel oil delivery at high fire
USGPH
(B)
D458
D2281
D460
D461
D462
D2282
Summary of Contents for C9511200
Page 14: ...14 RL 28 2 38 2 SINGLE PHASE ...
Page 15: ...15 RL 50 2 SINGLE PHASE ...
Page 16: ...16 RL 28 2 38 2 50 2 SINGLE PHASE ...
Page 17: ...17 RL 38 2 50 2 THREE PHASE ...
Page 18: ...18 RL 38 2 50 2 THREE PHASE ...
