Dettson Chinook C105-M-V, Installation Instructions And Homeowner'S Manual

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Figure 6 – Horizontal right position
may require internal acoustical lining. As an alternative,
fibrous ductwork may be used if constructed and installed
in accordance with the latest edition of SMACNA con-
struction standard on fibrous glass ducts. Both acousti-
cal lining and fibrous ductwork shall comply with NFPA
90B as tested by UL Standard 181 for Class 1 Rigid air
ducts.
6 GAS SUPPLY AND PIPING
6.1 GENERAL
Gas piping must be installed in accordance with national
and local codes. Refer to current edition of NFGC in the
U.S.A.
Refer to current edition of CAN/CSA B149.1 in Canada.
Installations must be made in accordance with all author-
ities having jurisdiction.
Use a back-up wrench on the inlet of the gas valve when
connecting the gas line to the gas valve.
Report to Table 2 for recommended gas pipe sizing. Sup-
port all gas piping with appropriate straps and hangers.
Use a minimum of 1 hanger every 6 ft (1.8 m). Joint com-
pound (pipe dope) should be applied sparingly and only
to male threads of joints. Pipe dope must be resistant to
the action of propane gas.
An accessible manual equipment shut off valve MUST
be installed external to furnace casing.
Install a sediment trap in riser leading to furnace as
shown in Figure 10 Typical gas pipe arrangement. Con-
nect a capped nipple into lower end of tee.
Capped
nipple should extend below level of furnace gas controls.
Install a union between the manual shut off gas and the
gas valve in order to remove it easily.
Piping should be pressure and leak tested in accordance
with the current edition of the NFGC in the United States,
local, and national plumbing and gas codes before the
furnace has been connected. Refer to current edition of
NSCNGPIC in Canada.
The gas supply pressure shall be within the maximum
and minimum inlet supply pressures marked on the rat-
ing plate and in Table 3.
The furnace gas valve inlet pressure tap connection is
suitable to use as test gauge connexion providing test
pressure.
6.2 PROPANE CONVERSION
To convert from natural to L.P. gas, installer should use
the appropriate conversion kit. Please refer to Table 19.
The conversion kit consist of orifices, jumper and stickers
to clearly identify conversion on the gas valve.
Follow the steps bellow to convert the gas valve to
propane :
1. Move the switch located on the valve to the «off»
position.
2. Remove the «NAT. GAS» label from the top of the
19