85-03-01058-O
FV33i Gen 3
Page
45
3.4
PLUMBING TECHNICAL REFERENCES
3.4.1
Gas Supply Requirements
NOTE: if Insert is to be operated with LP gas, see Chapter
in this manual
before proceeding.
CORRECT GAS PRESSURE AND PROPER GAS SUPPLY LINE SIZING IS IMPERATIVE TO THE SUCCESSFUL PERFORMANCE OF YOUR
MENDOTA GAS FIREPLACE INSERT. BE SURE THE GAS SUPPLIER OR PLUMBER CAREFULLY CHECKS FOR CORRECT GAS PRESSURE
AND GAS LINE SIZING WHEN INSTALLING THE FIREPLACE INSERT.
IT IS CRITICAL TO CAREFULLY CHECK FOR GAS LEAKS WHEN HOOKING UP THE FIREPLACE INSERT. CHECK WITH SOAP AND
WATER SOLUTION OR COMBUSTIBLE GAS SNIFFER.
BE SURE TO INSTALL FLEX GAS LINE WITH BRASS-TO-BRASS FITTINGS TO PREVENT GAS LEAKS AT CONNECTIONS.
GAS SUPPLY PIPING MUST INCLUDE A DRIP LEG TO ELIMINATE THE POSSIBILITY OF CONTAMINANTS ENTERING THE GAS
TRAIN. ADHERE STRICTLY TO LOCAL AND NATIONAL CODES.
3.4.2
Gas Supply Line Sizing
A 48” X 3/8” SS flex supply line with a 3/8” male NPT end adapter comes installed on the insert. The flex supply line comes
installed through the back of the insert. If an installation does not allow room for the gas line at the back of the insert the gas line
can be rerouted out the side of the insert. To reroute the flex line, disconnect the flex line from the ball valve and pull it out of the
insert. Then reconnect the flex line to the ball valve and with it exiting the side of the insert.
Use the table, below, to determine the proper gas line diameter that must be installed to run from the supply regulator to the
end of the 48” SS flex supply line adapter. Refer to the following table for proper gas pipe diameters.
PIPE LENGTH
[FEET]
SCHEDULE 40 PIPE
INSIDE DIA.
TUBING, TYPE L
OUTSIDE DIAMETER
NAT.
L.P.
NAT.
L.P.
0-10
1/2" [1.3 cm]
3/8" [1.0 cm]
1/2" [1.3 cm]
3 /8" [1.0 cm]
10-40
1/2" [1.3 cm]
1/2" [1.3 cm]
5/8" [1.6 cm]
1 /2" [1.3 cm]
40-100
1/2" [1.3 cm]
1/2" [1.3 cm]
3/4" [2.0 cm]
1 /2" [1.3 cm]
100-150
3/4" [2.0 cm]
1/2" [1.3 cm]
7/8" [2.3 cm]
5 /8" [1.6 cm]
150-200
3/4" [2.0 cm]
1/2" [1.3 cm]
7/8" [2.3 cm]
3 /4" [2.0 cm]
NOTE:
Some areas allow copper tubing or galvanized pipe - check with local approval agencies and codes NEVER use plastic
pipe.
Gas Line Inlet Locations