55
Heat & Glo • COSMO32-IFT-B, COSMO36-IFT-B, COSMO42-IFT-B Installation Manual • 2619-980 Rev. G • 7/20
A. Fuel Conversion
• Make sure the appliance is compatible with available gas
types.
• Conversions must be made by a qualified service
technician using Hearth & Home Technologies speci
fi
ed
and approved parts.
B. Gas Pressure
• Verify inlet pressures. Verify minimum pressures when
other household gas appliances are operating.
• Install regulator upstream of valve if line pressure is
greater than 1/2 psig.
9
9
Gas Information
Gas Pressure
Natural Gas
Propane
Minimum inlet pressure
5.0 in. w.c.
11.0 in. w.c.
Maximum inlet pressure
10.0 in. w.c.
13.0 in. w.c.
Manifold pressure
3.5 in. w.c.
10.0 in. w.c.
Note:
Have the gas supply line installed in accordance with
local codes, if any. If not, follow ANSI
Z
223.1. Installation
should be done by a quali
fi
ed installer approved and/or
licensed as required by the locality. (In the Commonwealth
of Massachusetts installation must be performed by a
licensed plumber or gas
fi
tter).
Note:
A listed (and Commonwealth of Massachusetts ap-
proved) 1/2 in. (13 mm) T-handle manual shut-o
ff
valve
and
fl
exible gas connector are connected to the 1/2 in. (13
mm) control valve inlet.
• If substituting for these components, please consult
local codes for compliance.
Fire Risk.
Risk of Fire! Risk of Explosion!
Incorrect pressure will damage valve.
• Isolate gas supply piping BEFORE pressure
testing gas line at test pressures above 1/2
psig.
• Close the manual shuto
ff
valve BEFORE
pressure testing gas line at test pressures
equal to or less than 1/2 psig.
WARNING
• Optimum appliance performance requires proper input
pressures.
• Gas line sizing requirements will be determined in ANSI
Z223.1 National Fuel Gas Code in the USA and CAN/
CGA B149 in Canada.
• Pressure requirements when in operation are:
REMOVE 2 SCREWS
Figure 9.1 Basepan Removal - COSMO42-IFT-B Shown
Access Through the Valve Assembly
(For Service/Conversion)
1. Locate and remove the two screws that secure the
basepan to the appliance. See Figure 9.1. Remove
basepan. Retain screws.
Access Through the Control Cavity
(For Service/Conversion)
The lower access cover panel is removable if
fi
nishing
material has not been previously installed. See Section
8.A for removal instructions.