Gas Supply Piping - HELIX VX-050 Installation, Operation & Maintenance Manual

FIGURE 7-1 Gas Connection (at top of Boiler)
Attach Supplied Gas
Shutoff Valve (shown
in open position)
NOTICE
Use two (2) wrenches when tightening boiler
fittings and pipes. Boiler's internal piping can be
damaged if subjected to excessive torque.

7 - GAS SUPPLY PIPING

• Do not try to light any appliance.
• Do not touch any electrical switch; do not use
Gas
any phone in your building.
Connection
• 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.
7.1 General
• 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
• Canada - Natural Gas and Propane Installation Code,
• Size and install gas piping system to provide sufficient
gas supply to meet maximum input at not less than
minimum supply pressure. See Table 8.
• Support piping with hooks straps, bands, brackets,
hangers, or building structure components to prevent or
dampen excessive vibrations and prevent strain on gas
connection. Boiler will not support piping weight.
• Use thread (joint) compound (pipe dope) suitable for
liquefied petroleum gas.
• Install manual main shutoff valve outside of jacket. See
figure 7-1.
7.2 Conversion Kit Instructions
• See Gas Conversion Kit Instructions included with Boiler.
Table 8 - Gas Supply Pressure
7.3 Leak Check Gas Piping
MODEL
050
075
3.0" w.c. (0.7
100
150
200
Note: See Glossary - Piping Table 16
31
!
CAUTION
WHAT TO DO IF YOU SMELL GAS
54
CAN/CSA B149.1
Gas Supply Pressure
Natural Gas
Min. Max.
13.5" w.c.
kPa) (3.3 kPa)
Propane
Min. Max.
5.0" w.c. (1.2 13.5" w.c. (3.4
kPa) kPa)