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26D4720
10
MCUF Series Vent-Free Firebox
Consult all local codes. All gas piping must be installed to
comply with local codes, or in the absence of local codes,
with the latest edition of the National Fuel Gas Code ANSI
Z223.1/NFPA54.
Remove the baseplate for ease of gas line installation.
Remove three (3) screws along the front edge of the base-
plate. Remove four (4) screws which secure the baseplate
to the combustion casing (two at rear and one along each
side). Replace baseplate prior to connecting gas line to
heater. Consult heater installation and operating instruc-
tions for correct installation of the heater into the rebox.
The 1/2" gas line may enter either from the left side or right
side of the rebox. Gas access holes are provided on both
sides of the rebox.
A listed manual shutoff valve must be installed upstream
of the appliance. A union tee and plugged
1
/8" NPT pres-
sure tapping point should be installed upstream of hte
appliance.
Install main gas valve (equipment shutoff
valve) in an accessible location. The main gas valve is for
turning on or shutting off the gas to the replace.
A sediment trap may be upstream of the heater to prevent
moisture and contaminants from passing through trap to
the heater controls and burners. Failure to do so could
prevent the heater from operating reliably. Consult appli-
cable codes.
An external regulator must be used on all propane / L.P.G.
heaters, in addition to the regulator tted to the heater, to
reduce the supply tank pressure to 13" w.c. (maximum).
Any copper tubing used to supply propane / L.P.G. from
the tank must be internally tinned.
After completing connection, test all gas joints from the
gas meter to the gas heater regulator for leaks. Using
soap and water solution or a gas sniffer. DO NOT USE
AN OPEN FLAME.
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