6
10777 - GB-CZ-HU-PL-RO-RU - 0 - 04 / 07
3.1
Front plate preparation
- Drill the boiler plate as shown in the above figure
(complying with EN 226). The flange accepts drilling
diameters between 140 and 150mm.
3.2
Fitting the burner on the boiler
- Fit the fixing pins as shown in the above figure.
- Fit the burner fixing flange on the front plate by inserting
the gasket and following the “HIGH” position. Thread
the 4 HM 8 x 25 screws with flat M8 washers (fittings
pack) in the holes reference W. Tighten the 4 screws
by hand (
do not lock the 2 upper screws
).
- Fit the burner on the boiler complying with the dimen-
sions recommended by the boiler maker for the nozzle
to penetrate the heating chamber, but keep 20mm at
least between the door and the end of the flare (see
above figure). Tighten the flange nut (No.13 hex head
wrench) then the 4 flange fixing screws on the front
plate. (No.13 flat wrench)
- Take off the burner cover by unscrewing the fixing screw.
- Take down the back half casing by unscrewing the 4
screws reference A and put it in the maintenance
position (see § 7).
- Fit the flexible to the oil pipes, and be carefull to oil
intake (item N) and oil return (item P).
3.3
Nozzle selection and fitting
Burners are supplied with nozzles not fitted (in the fittings
pack):
. DELAVAN 60°B (one stage burner)
. DELAVAN 60°B (two stage burner)
If it does not correspond to the wanted boiler power, re
place it (see table below).
Always comply with the nozzle types shown in the table
below that correspond to solid cone ones.
3.4
Spraying angle
To specify the heating chamber, its depth L may be
measured (between the heating chamber bottom and the
door insulation) and the smallest dimension in width or
height: D, and use the L / D ratio.
- short heating chambers (L / D less than 1.3) choose a
60° nozzle.
- long heating chambers (L / D over 1.3) choose a 45° nozzle.
Combustion quality alone shall validate sound nozzle
selection. If in doubt try different discharges and different
angles if you have them. Preferably go for the widest
angle and smallest discharge. Make do with a 60° angle
for lines not reheated.
Follow the steps described in paragraph 7 (Annual mainte-
nance) for fitting the nozzle.
3
CALCULATING OIL FEED PIPE DIAMETERS
M 8
30
8 mm min.
X
Ø 170 à 180
Ø 120 à 130
45°
45°
M 8
20 mm mini
One stage burner
Two stage burner
DELAVAN 60° W nozzle / assumed 7° C tank temperature
Nozzle reference (GPH)
1.25
1.35
1.50
1.75
2.00
2.25
Pump pressure (bar)
21.5
24.5
21.0
24.5
20.0
24.5
18.0
24.5
19.0
24.5
19.5
22.0
Burner heat output (kW)
85
91
91
98
98
109
109
126
126
143
144
152
92% output boiler power (kW)
78
83
84
90
90
100
100
116
116
132
132
140
DELAVAN 60° W nozzle / assumed 17° C tank temperature
Pump pressure (bar)
20.0
24.5
20.0
24.5
18.5
24.5
19.0
24.5
19.5
24.0
Burner heat output (kW)
85
94
94
104
105
120
121
137
137
152
92% output boiler power (kW)
78
86
86
95
96
111
111
126
126
140
DELAVAN 60° B nozzle / assumed 10° C tank temperature
Nozzle reference (GPH)
1.75
2.00
2.25
2.50
2.75
3.00
Pump pressure (bar)
10.5
13.5
10.5
12.5
10
13
10.5
13
11
13
11
11.5
Burner heat output (kW)
85
97
97
106
106
121
121
135
136
148
149
152
92% output boiler power (kW)
79
89
89
97
98
111
112
124
125
136
137
140
DELAVAN 60° B nozzle / assumed 17° C tank temperature
Pump pressure (bar)
11.5
13.5
10.5
12.5
10
13
10.5
13
11
13
11
12.5
Burner heat output (kW)
85
92
92
101
101
115
115
128
129
141
142
152
92% output boiler power (kW)
78
85
85
93
93
106
106
118
119
130
130
140
