Montigo RP620 - Manual (Page 19)

RP620 Power Vent Indoor Gas Fireplace
Page 19
XG0777 - 122014.1
Installation
Gas Inlet
Lights
Control Cable
Gas Pressure
Optimum appliance performance requires proper inlet 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 Natural Gas Propane
Maximum Inlet Pressure 14" WC (1/2 psi) 14" WC (1/2 psi)
Minimum Inlet Pressure
(with fireplace on)
5.5" W.C. 11" W.C.
Manifold Pressure
3.5" W.C.
+/- 2
10" W.C.
+/- 0.3
Section 5: Installing the gas line
Figure 15. Identifying the Gas Inlet
The manifold outlet pressure is set from the factory to the
appropriate pressure but should be verified.
To check pressures, gas valves have a provision to remove a
1/8” MPT plug and to be fitted with a hose barb.
Montigo requires a service shut off valve be located in an
accessible location to isolate the appliance.
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 15 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" MPT gas inlet.
Purge all air out of gas line before connecting.
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.
psi. This will damage the gas control valve.
MANIFOLD PRESSURE
MANIFOLD
Figure 14. Pressure Testing
Figure 14a. HSI Valve