Section 5: Installing The Gas Line; Fuel Conversion; Gas Pressure; Gas Connection - Montigo H38DF ST Installation & Maintenance Manual

H*38DF 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 to purchase a conversion kit.
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 Z221.3
„
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 21 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.
Gas Access 3"x 2"
Rectangle Opening
Figure 21. Gas line access.
Page 18
Installation
Natural Gas Propane
5.5in. w.c. 11in. w.c.
3.5in. w.c. 10in. w.c.
Ø 1 3/4"
2 3/4"
8 1/4"
16 1/4"
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.
CAUTION
We recommend careful consideration be given to the effects of elevated mantel
temperatures which may be in excess of product design, for example: candles, plastic
or pictures. This can cause melting, deformation, discoloration or premature failure of
T.V. radio, and other electronic components.
XG0207 - 011012.1