Vermont Castings MO18 Owner's Manual download pdf (Page 8)

20013055 7/05 Rev. 0

C. Gas Pressure

Proper input pressures are required for optimum appliance

performance. Gas line sizing requirements need to be made

following NFPA54 and CSA B-149..

Fire Risk

Explosion Risk

High pressure will damage valve.

• Disconnect gas supply piping BEFORE

pressure testing gas line at test pressures

above 1/2 psig.

• Close the manual shutoff valve BEFORE

pressure testing gas line at test pressures

equal to or less than 1/2 psig.

WARNING

High Altitude Derate

In the USA, input BTU shall be derated 4% (one orice size)

per 1000 feet for altitudes above 2000 feet. In Canada, input

BTU shall be derated 10% (two orice sizes) at altitudes

from 2000-4500 feet.

• Gas Supply Pressure: Minimum inlet gas supply pressure

must be 3.5 in. W.C. for natural gas or 11 in. W.C. for LP

gas for the purpose of input adjustment. Maximum inlet

gas pressure must not exceed 7.0 in. W.C. for natural

gas or 13 in. W.C. for LP gas. The gas line supplying the

appliance must be sufcient size to furnish the appropriate

supply pressure to the appliance while operating in the

“High” setting. (Minimum line ID of 1/2 in. required if the

line is longer than 20 ft.

• Gas Line Pressure Test: Perform pressure test according

to state and local code (if pressure exceeds 1/2 in. psi [3.5

kPa]) before appliance is connected. Be sure to release

air pressure from the gas line before connection is made

to the appliance. Excessive pressure will damage the gas

control and may cause a gas leak.

• Gas Leak Test: Make sure the gas connections are tight.

Turn on the gas and coat each joint with a non-corrosive

gas leak check solution. Always check for gas leaks with a

mild soap and water solution applied with a brush no larger

than 1” (25mm). Never apply soap and water solution with

a spray bottle. Air bubbles will form indicating any leaks.

DO NOT USE A FLAME OR ANY TYPE OF IGNITION

SOURCE TO CHECK FOR LEAKS. All leaks must be

corrected before proceeding with installation.

• The appliance must only be installed in a solid-fuel burning

replace with the ue damper clamped open.

• The minimum permanent free opening (in square inches)

that must be provided by the replace chimney or damper

to vent the ue gases is provided in Table 1. If the free

opening is smaller than the specied area, do not use this

appliance.

• The damper must be removed or xed in a manner in

which will secure it open. Some jurisdictions require the

damper to be removed or permanently welded fully open.

Check with state and local codes.

• Be sure that the chimney is completely unobstructed to

ensure proper ventilation of ue gases including carbon

monoxide (CO). CO (a poisonous gas) is tasteless,

odorless, colorless and undetectable without proper

equipment.

WARNING

CHECK FOR GAS LEAKS

Fire Risk

Explosion Risk

Asphyxiation Risk

• Check all ttings and connections.

• Do not use open ame.

• After the gas line installation is complete,

all connections must be tightened and

checked for leaks with a commercially

available, non-corrosive leak check

solution. Be sure to rinse off all leak check

solution following testing.

Fittings and connections may have loosened

during shipping and handling.

WARNING

Fire Risk

Explosion Risk

Do NOT change the valve settings.

• This valve has been preset at the

factory.

• Changing valve settings may result in re

hazard or bodily injury.

Shock Risk

Explosion Risk

Do NOT wire 110V to valve.

WARNING

• Prevent accidental appliance operation when not

attended.

• Unplug or remove batteries from remote control if

absent or if appliance will not be used for an extended

period of time.

• Pro pert y da mage p oss i ble fro m el evat ed

temperatures.

CAUTION

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Vermont Castings MO18 Owner's Manual Page 8

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