ECR PENNCO 41J Series, Installation, Operation & Maintenance Manual

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• Connect gas service from meter to control assembly(s)
in accordance with ANSI Z223.1 and local codes or
utility. On multiple base boilers, connect gas service
with branch lines from common main. Individual branch
lines must be same size as inlet to gas valve. Ground
joint union should be installed in each branch line for
easy servicing of gas controls. Drip leg or trap should be
installed at bottom of vertical section of piping at inlet to
each branch line. Figure 36. Pipe compound resistant
to action of liquefi ed petroleum gases must be used on
all threaded pipe connections.
• Main gas supply line should be adequate to prevent
undue pressure drop. See Chart 5 for pipe sizes for
gas mains.
• Boiler and its gas connection must be leak tested
before placing boiler in operation.
• Boiler and its individual shutoff vlave must be
disconnected from gas supply piping system
during any pressure testing of that system at test
pressures in excess of 1/2psi (3.5kPa).
• Boiler must be isolated from gas supply piping
system by closing its individual manual shutoff
valve during any pressure testing of gas supply
piping system at test pressures equal to or less
than 1/2 psig (3.5 kPa)
Chart 4
Minimum Gas Supply Pressure
Models
5.0 inches w.c.
300 500 600 1000 1300 1500
2000 2100 2500 2600 3000
Models
5.3 inches w.c.
400 700 800 900 1100 1200
1400 1600 1700 1800 1900 2200
2300 2400 2700 2800 2900
All
Models
Maximum Gas Supply Pressure
13.5 inches w.c.
All
Models
Manifold Pressure
3.5 inches w.c.
Chart 5
TABLE OF PIPE SIZES IN INCHES FOR GAS MAINS
(NATURAL GAS)
Boiler
No
20’ 30’ 40’ 50’ 60’ 80’ 100’ 125’ 150’
300 1¼ 1¼ 1¼ 1¼ 1¼ 1¼ 1½ 1½ 1½
400 1¼ 1¼ 1¼ 1¼ 1½ 1½ 1½ 1½ 2
500 1¼ 1¼ 1¼ 1½ 1½ 1½ 2 2 2
600 1¼ 1½ 1½ 1½ 2 2 2 2 2
700 1¼ 1½ 1½ 2 2 2 2 2 2½
800 1½ 1½ 2 2 2 2 2 2½ 2½
900 1½ 2 2 2 2 2 2½ 2½ 2½
1000 1½ 2 2 2 2 2½ 2½ 2½ 2½
1100 2 2 2 2 2 2½ 2½ 2½ 2½
1200 2 2 2 2 2½ 2½ 2½ 2½ 3
1300 2 2 2 2½ 2½ 2½ 2½ 3 3
1400 2 2 2 2½ 2½ 2½ 3 3 3
1500 2 2 2½ 2½ 2½ 2½ 3 3 3
1600 2 2 2½ 2½ 2½ 2½ 3 3 3
1700 2 2½ 2½ 2½ 2½ 3 3 3 3
1800 2 2½ 2½ 2½ 2½ 3 3 3 3
1900 2 2½ 2½ 2½ 3 3 3 3 3
2000 2 2½ 2½ 2½ 3 3 3 3 3
2100 2½ 2½ 2½ 3 3 3 3 3 4
2200 2½ 2½ 2½ 3 3 3 3 4 4
2300 2½ 2½ 3 3 3 3 3 4 4
2400 2½ 2½ 3 3 3 3 3 4 4
2500 2½ 3 3 3 3 3 4 4 4
2600 3 3 3 3 3 4 4 4 4
2700 3 3 3 3 4 4 4 4 4
2800 3 3 3 4 4 4 4 4 4
2900 3 3 4 4 4 4 4 4 4
3000 3 4 4 4 4 4 4 4 4
CONNECTING GAS SERVICE
Figure 36