Dunkirk XEB-4 - Vent Pipe Support and Optional Venting; Vent Pipe Support Spacing; Optional Horizontal Venting with Power Venter

Gas Supply Piping
CHECK GAS SUPPLY
The gas pipe to your boiler must be the correct size for the
length of the run and for the total BTU per hour input of all
gas utilization equipment connected to it. See Fig. 10 for
the proper size. Be sure your gas line complies with local
codes and gas company requirements.
The boiler and its individual shutoff valve must be
disconnected from the gas supply piping system during
any pressure testing of that system at test pressures in
excess of 1/2 psig (3.5 kPa).
The boiler must be isolated from the gas supply piping
system by closing its individual manual shutoff valve during
any pressure testing of the gas supply piping system at
test pressures equal to or less than 1/2 psig (3.5 kPa).
CONNECTING THE GAS PIPING
Refer to Fig, 11 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.
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 ZX223.1-latest revision. In
Canada, follow the CSA B149.1 and .2 Installation
Codes for Gas Burning Appliances and Equipment.
2. All pipe compound must be resistant to liquefied
petroleum gas.
3. Install ground joint union in gas supply line between
shut-off valve and boiler controls.
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 manual shut-off valve in 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.
CHECKING THE GAS PIPING
Upon completion of piping, check right away for gas
leaks. Open the manual shut-off valve. Test for leaks
by applying soap suds (or a liquid detergent) to each
joint. Bubbles forming indicate a leak. CORRECT
EVEN THE SMALLEST LEAK AT ONCE.
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FIG. 10 - GAS PIPE SIZES
*Outside diameter
The length of pipe or tubing should be measured from the
gas meter or propane second stage regulator.
FIG. 11 - GAS PIPING AT BOILER
WARNING
Never use a match or open flam to test for leaks.
17