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B. CONNECTING THE GAS PIPING
Refer to Fig.12 for the general layout at the boiler. It shows the basic fittings you will need. The
gas line enters the boiler from the right side jacket panel. The boiler may receive the gas supply
pipe through the left side, or rear jacket panel by relocating the gas valve connector and pipe
assembly. The boiler is equipped with a 1/2" NPT connection on the gas valve for supply piping.
The following rules apply:
1. Use only those piping materials and joining methods listed as acceptable by the authority
having jurisdiction, or in the absence of such requirements, by the National Fuel Gas Code,
ANSI Z223.1- latest revision. In Canada, follow the CAN/CGA B 149.1 and .2 Installation
Codes for Gas Burning Appliances and Equipment.
2. Use pipe joint compound suitable for liquefied petroleum gas on male threads only.
3. Use ground joint unions.
4. Install a sediment trap upstream of gas controls.
5. Use two pipe wrenches when making the connection to the gas valve to keep it from turning.
6. Install a manual shutoff valve in the vertical pipe about 5 feet above floor.
7. Tighten all joints securely.
8. Propane gas connections should only be made by a licensed propane installer.
9. Two stage regulation should be used by the propane installer.
10. Propane gas piping should be checked out by the propane installer.
C. CHECKING THE GAS PIPING
After all connection have been made, check immediately for leaks. Open the manual shutoff valve.
Test for leaks by applying soap suds (or a liquid detergent) to each joint. Bubbles forming indicate
leak. CORRECT EVEN TIlE SMALLEST LEAK AT ONCE.
WARNING
NEVER USE A MATCH OR OPEN FLAME TO TEST FOR LEAKS.
Length of
Pipe - Ft.
20
40
60
Length of
Pipe - Ft.
20
40
60
* Outside diameter
1/2"
92,000
63,000
50,000
Copper Tubing*
5/8" 3/4"
131,000 216,000
90,000 145,000
72,000 121,000
TABLE 3 GAS PIPE SIZES
NATURAL GAS
Pipe Capacity - BTU Per Hour Input Includes Fittings
314" 1"
190,000 350,000
130,000 245 000
105,000 195 000
PROPANE GAS
Pipe Capacity - BTU Per Hour Input Includes Fittings
Iron Pi _e
1/2"
189 000
129 000
103 000
1 1/4"
625,000
445,000
365,000
3/4"
393,000
267,000
217,000
26
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