Instruction manual

Figure 17. Gas Inlet Supply location.
Fuel Type
Verify that your replace is compatible with your available gas type.
Natural Gas or Propane shown by "N" or "L" in your model number
on rating plate�
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):
The manifold outlet pressure is set from the factory to the appropriate
pressure but should be veried.
To check pressures, control valves have a provision to remove a 1/8”
N.PT. plug to be tted 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 replace is being installed.
GAS CONNECTION
See Figure 16 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" Male NPT 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�
Pressure Requirements
Gas Pressure Natural Gas Propane
Minimum Inlet Pressure 5�5" W�C� 11" W�C�
Manifold Pressure 3�5" W�C� 10" W�C�
Section 5: Installing the gas line
1
¾”
1/2” MPT gas
inlet
Figure 17a. Identifying the Gas Inlet and Combustion Air Switch
Sensor Line
Located next to the Gas Inlet is the Combustion Air Switch Sensor
Line�
Do NOT obstruct or alter the Combustion Air Switch Sensor Line�
R720 & R820 Power Vent Indoor Gas Fireplace
Page 24
XG0772 - 100614
Installation