Model 702G/O Advanced gas/oil burners — Instruction manual
Carlin part number MN702GO Rev. 06/23/14
– 21 –
Where appliance instructions differ from this manual, follow the appliance instructions.
Before firing the burner . . .
Set combustion head (Dimension “A”)
1.
The combustion head adjusting screw is used to set the spacing between
the retention ring and throttle ring (or air cone), regulating how much air
passes around the retention ring.
2.
See Figure 16. Loosen the two housing cover screws. Then rotate the
head adjusting screw until the distance from the housing detent to the
beginning of the scale equals the value given in Table 5 (Dimension “A”).
Tighten the housing cover screws.
Set air damper (low fire position)
1.
See Figure 17. Loosen the air damper adjusting screw and locknut.
Rotate the adjusting screw until the air opening between the damper and
the damper housing equals the initial low-fire opening in Table 5. Leave
screw and locknut loose until final adjustment.
Determining final adjustments
1.
The burner is now adjusted to the
approximate
air settings for the firing
rate used. Follow the procedures on the following pages to use test
instruments and make final burner adjustments.
Figure 17
Set initial low fire air damper setting
Figure 16
Set initial combustion head position
Low-fire input
High-fire input
Combustion
head position
Dimension “A”
Air damper
low-fire
opening
Butterfly valve
open – low fire
(factory set)
#2 Fuel oil
Natural gas
#2 Fuel oil
Natural gas
GPH @ 100 PSIG
(Nozzle rating)
MBH
GPH @ 300 PSIG
MBH
Inches
(approximately)
Inches
(approximately)
%
(approximately)
3.50
490
6.00
840
0
3/8
50
3.75
525
6.50
910
1/16
3/8
50
4.00
560
6.90
966
1/8
7/16
50
4.50
630
7.80
1092
3/16
7/16
50
5.00
700
8.70
1218
3/8
1/2
50
5.50
770
9.50
1330
5/8
1/2
50
6.00
840
10.40
1456
1-1/8
9/16
50
6.50
910
11.20
1568
1-3/8
9/16
50
Nozzle specifications:
Standard
Hago 45° SS
Alternates
Hago 45° P
Monarch 45° PLP
Table 5
Initial burner settings (see the pages 20 through 21 for final adjustments using test instruments)
7. Set burner initial head and damper positions
Follow the procedures given here and on the follow-
ing pages to ensure the burner is correctly adjusted.
Take your time and the results in both gas and oil
modes should result in good operation, and avoid
return service calls.
You must perform the adjustments in the sequence
given in this manual.
Failure to follow the correct procedures could re-
sult in severe personal injury, death or substantial
property damage.
