Section 6: Installing The Gas Line; Fuel Consumption; Pressure Requirements; Gas Connection - Montigo R320-ST Installation & Maintenance Manual

Fuel Consumption

Verify that your fireplace is compatible with your available gas type. (Natural
Gas or Propane shown by "N" or "L" in your model number
If gas type is not compatible, contact your local Montigo representative
to purchase a conversion kit.
Conversion kits must be installed by a qualified service technician.
Gas Pressure
Optimum appliance performance requires proper input pressures.
Gas line sizing requirements will be determined in ANSI Z221.3
National Fuel Gas Code in the USA and CAN/CGA B149 in Canada.

Pressure requirements:

Pressure Requirements
Gas Pressure
Minimum Inlet Pressure
Manifold Pressure
The manifold outlet pressure is set from the factory to the appropriate
pressure but should be verified.
To check pressures, control valves have a provision to remove a 1/8"
N.PT. plug to be fitted with a hose barb.
Montigo requires a service shut off valve be located in an accessible
location to isolate the gas supply.
Only install gas shut-off valves approved for use by the state, province,
or other governing body in which the fireplace is being installed.

GAS CONNECTION

See Figure 14 below for location of gas line access.
Flexible gas connectors must not exceed 3 feet in length, unless
allowable within local regulations.
Connect incoming gas line to the 1/2"or 3/8" gas inlet port.
Purge all air out of gas line.
Check appliance connection, valve and valve train under normal
operating pressure with a commercially available leak check solution.
DO NOT USE A FLAME OF ANY KIND TO TEST FOR LEAKS.
3"
3"
Figure 14. Gas Inlet Supply location.
XG0772 - 030711
Installation
Natural Gas Propane
5.5" W.C. 11" W.C.
3.5" W.C. 10" W.C.
1/2" gas
inlet
R320-ST & 420 ST Power Vent Indoor Gas Fireplace
Section 5: Installing the Gas Line
XW2030
XW2032
DANGER
After gas line is connected, each
appliance connection, valve and valve
train MUST be checked while under
normal operating pressure with either a
Liquid Solution, or Leak Detection
Device, to locate any source of leak.
Tighten any areas where bubbling
appears or a leak is detected until
bubbling stops completely or leak is no
longer detected. DO NOT use a flame
of any kind to test for leaks. A fire or
explosion will occur, causing serious
injusy, property damage or death.
NOTICE
When pressure testing the fireplace,
Gas line, and input system follow the
appropriate local codes or your area.
DO NOT connect the fireplace to
pressures in excess of 1/2lb. This will
damage the gas control valve.
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