Connecting The Gas Piping; Checking The Gas Piping - Dunkirk Quantrum 90-50 Installation Manual

B. Connecting The Gas Piping
Refer to Figure #12 (on following page) for the general lay-
out 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 ½" NPT connection on
the gas valve for supply piping. The following rules apply:
1.
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 CSA- B 149.1 and .2 Installation Codes for Gas Burn-
ing Appliances and Equipment.
2.
2. Use pipe joint compound suitable for liquefied petro-
leum gas on male threads only.
3.
3. Use ground joint unions.
4.
4. Install a sediment trap upstream of gas controls.
5. 5. Use two pipe wrenches when making the connection to
the gas valve to keep it from turning.
6.
6. Install a manual shutoff valve in the vertical pipe about 5
feet above floor.
7.
7. Tighten all joints securely.
Length of
Pipe - Ft.
20
40
60
Length of
Pipe - Ft.
20
40
60
* Outside diameter
GAS SUPPLy PIPING
TABLE #3 – GAS PIPE SIzES
NATURAL GAS
Pipe Capacity - BTU Per Hour Input Includes Fittings
1/2" 3/4"
92,000 190,000
63,000 130,000
50,000 105,000
PROPANE GAS
Pipe Capacity - BTU Per Hour Input Includes Fittings
Copper Tubing*
5/8" 3/4"
131,000 216,000
90,000 145,000
72,000 121,000
8.
8. Propane gas connections should only be made by a
licensed propane installer.
9. 9. Two stage regulation should be used by the propane
installer.
10. 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 THE
SMALLEST LEAK AT ONCE.
Never use a match or open flame to test for leaks.
1"
350,000
245,000
195,000
1/2"
189,000
129,000
103,000
29
WARNING
!
1 1/4"
625,000
445,000
365,000
Iron Pipe
3/4"
393,000
267,000
217,000