Connecting Gas Service - UTICA BOILERS Gas-fired Boiler Operating Instructions Manual

1. Connect gas service from meter to control assembly in accordance with 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 leg 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 liquified 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 13 below.
2. 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.
3. To check for leaks in gas piping, use a soap and water solution or other approved
method.
WARNING:
4. Disconnect the boiler from the gas supply piping system during any pressure testing
of the gas piping. After reconnecting, leak test the gas connection and boiler piping before
placing the boiler back into operation.
Maximum Capacity of Pipe in
Cubic Feet of Gas Per Hour
(Gas pressure = 0.5 psig or less, pressure drop =
.5 in.w/c)
Nominal
Length of Pipe (Feet)
Iron Pipe
Size
10' 20'
1/2" 175 120
3/4" 360 250 200 170 138 118
1" 680 465 375 320 260 220
1.1/4" 1400 950 770 660 530 460
For additional information refer to "Table C" of the
National Fuel Gas Code Handbook.

CONNECTING GAS SERVICE

CONNECTING GAS SERVICE CONNECTING GAS SERVICE
CONNECTING GAS SERVICE CONNECTING GAS SERVICE
DO NOT USE AN OPEN FLAME.
30' 40' 60' 80'
97 82 66 57
100'
50
103
195
400
PAGE 12
FIGURE 13