Monessen-hearth Magnum Unvented Vent-Free Fireboxes MCUF42D SERIES User Manual download pdf (Page 12)

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GAS LINE INSTALLATION

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 baseplate.

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 instructions for correct

installation of the heater into the firebox.

The

/2" gas line may enter either from the left side or right side of the firebox. Gas access holes are provided on

both sides of the firebox.

A listed manual shutoff valve must be installed upstream of the appliance. A union tee and plugged

/8" NPT pressure tap-

ping point should be installed upstream of hte appliance.

IMPORTANT: 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 fireplace.

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 applicable codes.

An external regulator must be used on all propane / L.P.G. heaters, in addition to the regulator fitted 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.

Note: When connecting propane / L.P.G. vent-free room heaters, you must use pipe sealant resistant to

propane / L.P.G.

Important: Hold heater regulator with a wrench to prevent movement when connecting to inlet piping.

Check gas type: The gas supply must be the same as stated on the heater’s rating plate. If the gas supply

is different, DO NOT INSTALL THE HEATER. Contact your dealer for the correct model.

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.

Plumbing connections should only be performed by a qualified, licensed plumber. Main

gas supply must be off when plumbing gas line to fireplace or performing service.

WARNING

Connecting directly to an unregulated

propane / L.P.G. tank can cause an

explosion.

WARNING

Do not connect directly to natural gas 1/2 PSI or 2 PSI systems. Always make sure

natural gas pressure is regulated 10.5 w.c. (maximum before operating the unit).

WARNING

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Monessen-hearth Magnum Unvented Vent-Free Fireboxes MCUF42D SERIES User Manual Page 12