PF X4-400, Installation And Operation Manual

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NOTE: Serious Damage To The Burner May Result If The Blast
Tube Is Extended Into The Combustion Chamber.
4.5
Secure the burner to the heat exchanger or boiler, using the burner-mounting flange. The burner-
mounting flange must be secured to the blast tube at the selected location for proper insertion
into the end or front wall of the fired unit. A tight seal between the mounting flange and the front
plate should be accomplished using the factory-furnished gasket or a ceramic or other non-
asbestos fiber rope.
5 GAS PIPING
5.1 Contact you local gas service company to ensure that adequate gas service is available and to
review applicable installation codes for your area. All gas piping installations must be in
accordance with NFPA 54, National Fuel Gas Code, Definitions and General Field
Recommendations, CGA 3.0, Canadian Natural Gas Installation Code CAN/CGA B149.1 or
Propane Installation Code, CGA B 149.2. This product must be installed only by a Licensed
Plumber or Gasfitter, when installed in the Commonwealth of Massachusetts.
5.2 Size the main gas line in accordance with Table 2. The figures shown are for straight lengths of
pipe at 0.2” w.c. pressure drop, which is considered normal for low-pressure systems. Note that
fittings such as elbows and tees will add to the pipe pressure drop.
Table 2 - Gas Piping Pressure Drop Data
EQUIVALENT LENGTH OF STRAIGHT PIPE IN FEET
20 30 40 50 60 80 100 150 200
Pipe Size In Inches CFH GAS WITH .2” PRESSURE DROP
3/4” 152 120 105 93 84 73 66 54 45
1” 300 250 210 190 180 150 135 110 75
1-1/4” 520 425 360 325 300 260 230 190 165
1-1/2” 800 690 560 500 480 410 370 300 260
2” 1700 1400 1200 1100 1000 850 750 600 540
2-1/2” 3000 2500 2100 1900 1800 1550 1375 1100 950
EQUIVALENT LENGTHS OF STANDARD PIPE IN FEET FOR LISTED FITTINGS
Fitting Type 3/4 1 1-1/2 1-1/2 2 2-1/2 Nominal Pipe Size In Inches
Std. Tee 2.4 5.5 7.5 9.0 12.0 13.5
Std. Elbow 4.4 2.7 3.7 4.5 5.5 6.1
5.3 Refer to Figure 3 for details of gas piping. (Also refer to any additional piping diagrams supplied for this
specific unit.)
5.4 Mount leakage test and main gas cocks, main automatic gas valve or combination gas
valve/pressure regulator, and auxiliary valves (if required and not factory mounted) per piping
diagram or Figure 3.
5.5 Install pressure regulator (not used with combination gas valve/pressure regulator) directly
upstream of main automatic gas valve(s) and fit drip leg and main gas cock upstream of regulator
or automatic valve(s).
5.6 The pilot line should be piped into the upstream tapped nipple to minimize pilot line piping length.
An optional location is in a tapping located on the main shut-off cock. Refer to Figure 3. For
ease of servicing we recommend the use of a union immediately upstream of the main gas
pressure regulator or combination gas valve/pressure regulator.
4