Gas Supply Piping; General; Lp Conversion - UTICA BOILERS UCS 380 Installation, Operation And Maintenance Manual

FIGURE 7-1 Gas Connection (View from Back of Boiler)
Use two (2) wrenches when tightening and
Note
fitting to pipe boiler's threaded fittings. Boiler's
internal piping can be damaged if subjected to
excessive torque.
7-2- Drip Leg
Gas Supply
Natural Gas
Min Max
3.0" w.c. 10.5" w.c.
(0.87 kPa) (2.61 kPa)

7 - GAS SUPPLY PIPING

Gas
Connection
Pressure
LP
Min Max
8.0" w.c. 13.0" w.c.
(1.99kPa) (3.23kPa)
CAUTION
! !
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.

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 54
• Canada - Natural Gas and Propane Installation Code,
CAN/CSA B149.1
• Size and install gas piping system to provide sufficient gas
supply to meet maximum input at not less than minimum
supply pressure. UCS-380 requires a gas rate of 377
ft3/h (10.7 m3/h) for Natural Gas (Gas A) and 149 ft3/h
(4.2m3/h) for Liquid Propane Gas (Gas E).
• Gas meter and supply pipes must be capable of delivering
the listed quantity of gas in addition to demand from any
other appliances in the house. UCS-380 requires a 1"
(25.4 mm) gas supply pipe.
Use of CSA approved corrugated, semi-rigid
stainless steel tubing with polyethylene jacketing
is approved for use with boilers following tubing
manufacturer's instructions.
Use of flexible gas tubing also know as "appliance
whip" is not allowed per NFPA 54.
• 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 external field sourced manual main gas shutoff
valve, ground joint union, and sediment trap upstream of
gas valve. See figure 7-2.
• Leak test boiler and gas line connections before placing
boiler into operation.

7.2 LP Conversion

• See conversion instructions included with LP Conversion
Kit. Purchased Separately.
38
NOTICE
PN 240011662 Rev. K [01/31/2020]