Section 5: Installing The Gas Line; Gas Pressure; Section 5-3: Gas Connection - Montigo RP620 Series Installation & Maintenance Manual

Section 5: Installing the gas line

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 (during operation):
PRESSURE REQUIREMENTS
Gas Pressure
Minimum inlet pressure
Minimum Inlet Pressure (with fireplace on)
Manifold pressure
Figure 9. Pressure Requirements
• 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 ⅛"
M.P.T. 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 9.b 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 ½" MPT gas inlet.
• Purge all air out of gas line before connecting port.
• 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.
Figure 9.b Pressure testing
XG0777 - 180525
Natural Gas Propane
14in. w.c. 14in. w.c.
5.5in. w.c. 11in. w.c.
3.5in. w.c. 10in. w.c.
+/-2 +/-0.3
CONTROL CABLE GAS INLET
Figure 9.b.b Identifying the Gas Inlet
MANIFOLD PRESSURE
MANIFOLD PRESSURE ADJUSTMENT
(UNDER CAP SCREW)
INLET
PRESSURE TAP
INLET
IGNITION SYSTEM
CONTROL SWITCH
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 injury, property damage or death.
NOTICE
When pressure testing the fireplace, gas line, and input system
follow the appropriate local codes for your area. DO NOT connect
the fireplace to pressures in excess of ½lb. This will damage the gas
control valve.
Installation
LIGHTS
IGNITER
CONNECTOR
MANIFOLD
MANIFOLD
PRESSURE TAP
OUTLET
PILOT OUTLET
CONTROLS PILOT ADJUSTMENT (UNDER
CONNECTOR CAP SCREW)
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