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GAS SERVICE & PIPE CAPACITY
Before connecting the burner to the gas supply, insure that the gas pipes and service meter
are large enough to permit the additional load of the gas burner (see Chart 4).
Chart 4: Pipe Capacity Table*( x 1,000 BTU’s)
Nominal diameter of pipe in inches
Pipe Length**
¾” 1” 1 ¼” 1 ½”
15’
172 345 750
30’
120 241 535 850
45’
99 199 435 700
60’
86 173 380 610
75’
77 155 345 545
90’
70 141 310 490
105’
65 131 285 450
120’
120 270 380
150’
109 242 300
180’
100 225 225
* Using 0.6 Specific Gravity Gas and a Pressure Drop of 0.3” of Water Colum
n
**
Each 90
0
elbow counts as 3’ for the purpose of these calculations
Picture 2: DIE CAST FLANGE: (picture to the left)
Install the gasket and Die Cast flange to the boiler.
Tighten the bolts. Measure the boiler or furnace-mounting plate
to determine the flame tube insertion depth required and make a
mark on the tube (with a marker or screwdriver). Deduct ¼”
from the total length and tighten the flange on the flame tube with
the deducted insertion depth. The ¼” deduction will prevent the
tip of the flame tube from burning off. Slide the blast tube into
the boiler to the proper
depth and tighten the two setscrews using
a 4 mm allen key. Seal off any free openings with either high
temperature cement or high temperature silicone.
Picture 2: BODY FLANGE: (picture to the left)
First, install the gasket and boiler flange to the boiler.
• For heat exchangers with a diamond stud pattern, one allen screw
on the flange should be on the top, slightly to the left of the 12
o’clock stud. The second screw should be on the right (slightly above
the 3 o’clock position stud). Tighten all the nuts equally. Make sure
that the allen screws are backed out, to allow enough clearance.
Then, insert the SU-
2A gas burner into the boiler. Once the burner is
inserted and pushed all the way forward, tighten the allen screw on
the top of the flange. This screw MUST go into the grove that is on
the burner housing. Tighten the second allen screw, located on the
right side of the flange. This screw should be tight.
• For heat exchangers with a square stud pattern, move one of the
allen screws so that both are under the top two boiler studs. Tighten
the bolts and install the burner. Make sure the burner is straight and
tighten the allen screws.
• Seal off any free openings with either high
temperature cement or
high temperature silicone.