CONNECT GAS SERCONNECT GAS SER
CONNECT GAS SERCONNECT GAS SER
CONNECT GAS SER
VICEVICE
VICEVICE
VICE
Connect gas service meter to control
assembly in accordance with the latest
revision of ANSI Z223.1 and local codes or
utility. A ground joint union should be installed
for easy removal of gas control for servicing.
A drip or trap must be installed at the bottom
of a vertical section of piping at the inlet to the
boiler. A pipe compound resistant to the
action of liquefied petroleum gases must be
used on all threaded pipe connections. Check
with the local utility for location of manual
shutoff valve if required. (See figure 8 at
right.)
PAGE 7
FIGURE 8
1. The gas line should be of adequate size to prevent undue pressure drop and never
smaller than the pipe size of the main gas control valve. See chart below.
Maximum Capacity of Pipe in Cubic Feet of Gas Per Hour (Cubic Meters per Hour)
(Gas pressure = 0.5 psig (3.45 kPa) or less pressure drop = .5 in.w/c(1.27 cm w/c))
Nominal
Length of Pipe
Iron Pipe
Size 10' 20' 30' 40' 60' 80' 100'
(3.05m) (6.10m) (9.14m) (12.19m) (18.29m) (24.38m) (30.48m)
1/2" 175 120 97 82 66 57 50
(1.27 cm) (4.96) (3.40) (2.75) (2.32) (1.87) (1.61) (1.42)
3/4" 360 250 200 170 138 118 103
(1.91 cm) (10.20) (7.08) (5.66) (4.81) (3.91) (3.34) (2.92)
1" 680 465 375 320 260 220 195
(2.54 cm) (19.26) (13.17) (10.62) (9.06) (7.36) (6.23) (5.52)
1.1/4" 1400 950 770 660 530 460 400
(3.18 cm) (39.65) (26.90) (21.81) (18.69) (15.01) (13.03) (11.33)
For additional information refer to Part 10, table 10-2 of the National Fuel Gas Code
Handbook, or in Canada, the CAN1-B149.1 and/or B149.2 Installation Codes for Gas-
Burning Equipment.
2. To check for leaks in gas piping, use a soap and water solution or other approved method.
WW
WW
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ARNING:ARNING:
ARNING:ARNING:
ARNING: DO NOT USE AN OPEN FLAME.
3. The boiler and its individual shutoff valve must be disconnected from the gas supply
piping system during any pressure testing of that system at test pressures in excess of
1/2 psig (3.5 kPa).
4. The boiler must be isolated from the gas supply piping system by closing its individual
manual shutoff valve during any pressure testing of the gas supply piping system at test
pressures equal to or less than 1/2 psig (3.5 kPa).
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