Burnham Minuteman II, Installation, Operating And Service Instructions

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Table 5: Specific Gravity Correction Factors
C.
Pressure test. The boiler and its gas connection must be
leak tested before placing boiler in operation.
1. Protect boiler gas control valve. For all testing over
½ psig, boiler and its individual shutoff valve must
be disconnected from gas supply piping. For testing
at ½ psig or less, isolate boiler from gas supply
piping by closing boiler's individual manual shutoff
valve.
Figure 8: Recommended Gas Piping
Table 4: Fitting Equivalent Lengths
2. Locate leaks using approved combustible gas
detector, soap and water, or similar nonflammable
solution. Do not use matches, candles, open flames,
or other ignition source.
NOTICE
USA boilers built for installation at altitudes greater than 2,000 feet above sea level have been specially
orificed to reduce gas input rate 4 percent per 1,000 feet above sea level per the National Fuel Gas Code, ANSI
Z223.1, Section 8.1.2 and Appendix F. Canadian boilers' orifice sizing is indicated on the rating label. High
altitude boiler models are identifiable by the model number suffix "H" on the rating label.
Fitting
Nominal Pipe Size
½ ¾ 1 1¼
45° Ell
0.7 1 1.2 1.6
90° Ell 1.6 2.1 2.6 3.5
Tee (As Elbow) 3.1 4.1 5.2 6.9
Specific
Gravity
Correction
Factor
Specific
Gravity
Correction
Factor
0.50 1.10 1.30 1.07
0.55 1.04 1.40 1.04
0.60 1.00 1.50 1.00
0.65 0.96 1.60 0.97
0.70 0.93 1.70 0.94
0.75 0.90
0.80 0.87