Burnham IN10 manual Danger, Fitting Equivalent Lengths, less than 2000 ft. elevation

4.All above ground gas piping upstream from manual gas valve must be electrically continuous and bonded to a grounding electrode. Do not use gas piping as a grounding electrode. Refer to the National Electrical Code, ANSI/NFPA 70 and/or CSA C22.1 Electrical Code.

C.Pressure Test. The boiler and its gas connection must be leak tested before placing boiler in operation.

1.Protect boiler gas valve. For all testing over ½ psig, boiler an its individual shut-off 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 shut-off valve.

2.Using soap solution, or similar non-combustible solution, electronic leak detector or other approved method. Check that boiler gas piping valves, and all other components are leak free. Eliminate any leaks.

DANGER

Doe not use matches, candles, open flames or other ignition source to check for leaks.

Table 3: Maximum Capacity of Schedule 40 Pipe in CFH for Natural Gas Pressures of 0.5 psig or Less

Length\		0.3 inch w.c. Pressure Drop					0.5 inch w.c. Pressure Drop
[Feet]	½		¾	1	1¼	½		¾	1	1¼
10	132		278	520	1,050	175		360	680	1,400
20	92		190	350	730	120		250	465	950
30	73		152	285	590	97		200	375	770
40	63		130	245	500	82		170	320	660
50	56		115	215	440	73		151	285	580
60	50		105	195	400	66		138	260	530
70	46		96	180	370	61		125	240	490
80	43		90	170	350	57		118	220	460
90	40		84	160	320	53		110	205	430
100	38		79	150	305	50		103	195	400

Table 4: Fitting Equivalent Lengths

Fitting		Nominal Pipe Size
	½	¾	1	1¼
45° Ell	0.7	1.0	1.2	1.6
90° Ell	1.6	2.1	2.6	3.5
Tee	3.1	4.1	5.2	6.9
(As Elbow)

Table 5: Specific Gravity Correction Factors for Natural Gas

Specific	Correction	Specific	Correction
Gravity	Factor	Gravity	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

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, NFPA 54/ ANSI Z223.1. Canadian boilers' orifice sizing is indicated on the rating label. High altitude boiler models are identifiable by the third digit in the model number suffix on the rating label:

_IN_ _ _ - _ _ 2	less than 2000 ft. elevation
_IN_ _ _ - _ _ 4	2000 to 4500 ft. elevation (Canada)
_IN_ _ _ - _ _ 5	2000 to 5000 ft. elevation (USA)

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