PAGE 14
CONNECTING GAS SERVICE
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 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 7 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:
DO NOT USE AN OPEN FLAME
.
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.
5. See figure 7 below for a typical gas line installation, and the table below for pipe sizes.
FIGURE 6
FIGURE 7
TABLE OF PIPE SIZES IN INCHES FOR NATURAL GAS MAIN
MODEL
NUMBER
20'
30'
40'
50'
60'
80'
100'
125'
500
1.25"
1.25"
1.50
1.50"
2.00"
2.00"
2.00"
2.00"
600
1.25"
1.25"
1.50"
1.50"
2.00"
2.00"
2.00"
2.00"
750
1.25"
1.50"
1.50"
2.00"
2.00"
2.00"
2.00"
2.00"
900
1.50"
2.00"
2.00"
2.00"
2.00"
2.00"
2.50"
2.50"
1000
1.50"
2.00"
2.00"
2.00"
2.00"
2.50"
2.50"
2.50"
1200
2.00"
2.00"
2.00"
2.00"
2.50"
2.50"
2.50"
2.50"
1500
2.00"
2.00"
2.50"
2.50"
2.50"
2.50"
3.00"
3.00"
1800
2.00"
2.00"
2.50"
2.50"
2.50"
3.00"
3.00"
3.00"
2100
2.50"
2.50"
2.50"
3.00"
3.00"
3.00"
3.00"
4.00"
2400
2.50"
2.50"
3.00"
3.00"
3.00"
3.00"
3.00"
4.00"
Содержание MAGB
Страница 6: ...PAGE 5 TYPICAL LAY OUTS FOR GAS FIRED SYSTEMS ...
Страница 7: ...PAGE 6 SUPPLY AND RETURN PIPING ...
Страница 24: ...PAGE 23 FIGURE 16 PHASE 2 CONTROL LOCATIONS AND WIRING ...
