Section 5-1: Fuel Conversion; Section 5-2: Gas Pressure; Section 5-3: Gas Connection - Montigo L42DF ST Installation & Maintenance Manual

L42DF-ST* Indoor Gas Fireplace
Section 5: Installing the Gas Line

Section 5-1: Fuel Conversion

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.
Conversion kits must be installed by a qualified service
„
technician.

Section 5-2: Gas Pressure

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 are:
„
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.

Section 5-3: Gas Connection

See Figure 20 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.
„
WARNING
An inspection of the explosion relief flappers and door MUST be made prior to
lighting the fireplace. A faulty seal on the door gasket and/or explosion ports will
result in products of combustion leaking into the living space and may result in
carbon monoxide poisoning.
Page 22
Installation
Natural Gas Propane
5.5in. w.c. 11in. w.c.
3.5in. w.c. 10in. w.c.
Note: 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 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.
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.
Figure 20. Gas line access.
WARNING
When installing the replace - gas lines, ttings, accesso-
ries or any other objects cannot impede the proper
movement of the door buckles.
3
7 8 "
1 3"
1 8 "
XG0182 - 151126