Gas Supply Piping - Dunkirk XEB-2 Installation, Operation & Maintenance Manual

WHAT TO DO IF YOU SMELL GAS
Do not try to light any appliance.
Do not touch any electrical switch; do not use
any phone in your building.
!
Immediately call your gas supplier from
a neighbor's phone. Follow gas supplier's
instructions.
If you cannot reach your gas supplier, call the
fire department.
Connecting The Gas Piping
Refer to Figure 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. Flexible gas connectors must
never breach any boiler openings.
Figure 12 - Gas Piping At Boiler
Automatic
Manifold
Gas Valve
Floor Line
PRESSURE
MIN. SUPPLY
MAX. SUPPLY
MANIFOLD
The following rules apply:
1.
Use piping materials and joining methods acceptable
to authority having jurisdiction. In absence of such
requirements:
USA - National Fuel gas Code, ANSI Z223.1/NFPA 54
Canada - Natural Gas and Propane Installation Code,
CAN/CSA B149.1
CAUTION
Manual Main
Shut-Off Valve
Ground
Joint
Union
Sediment
Trap
Table 7
GAS
NATURAL PROPANE
5" w.c. 11" w.c.
13.5" w.c. 13.5" w.c.
3.5" w.c. 10" w.c.

gAS SuppLy pIpINg

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 (1.5m) 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.
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 Gas Table
8 for the proper size. Be sure your gas line complies with
local codes and gas company requirements.
Fire Hazard. Do not use matches, candles,
!
open flames, or other methods providing
ignition source. Failure to comply will result in
death or serious injury.
Checking The Gas Piping
Pressure test boiler and gas connection before placing
boiler in operation.
• Pressure test over 1/2 psig (3.5 kPa). Disconnect
boiler and its individual gas shutoff valve from gas
supply system.
• Pressure test at 1/2 psig (3.5 kPa) or less. Isolate
boiler from gas supply system by closing manual gas
shutoff valve. See figure 7-6.
• Locate leakage using gas detector, noncorrosive
detection fluid, or other leak detection method
acceptable to authority having jurisdiction. Do not
use matches, candles, open flames, or other methods
providing ignition source.
• Correct leaks immediately and retest.
19
DANGER