Gas Supply - Empire Comfort Systems MILLIVOLT 3 Series Installation Instructions And Owner's Manual

The gas pipeline can be brought in through the right or left
side of the appliance. Consult the current National Fuel Gas
Code, ANSI Z223.1 CAN/CGA-B149 (.1 or .2) installation code.
RECOmmENdEd GAS PIPE dIAmETER
Schedule 40 Pipe
Pipe
Inside diameter
Length
(Feet)
NaturaL
1/2"
0-10
12.7mm
1/2"
11-40
12.7mm
1/2"
41-100
12.7mm
3/4"
101-150
19mm
NOTE: Never use plastic pipe. Check to confirm whether your
local codes allow copper tubing or galvanized.
f i r e - p a r t s . c o m
NOTE: Since some municipalities have additional local
codes, it is always best to consult your local authority and
installation code.
The use of the following gas connectors is recommended:
— ANSI Z21.24 Appliance Connectors of Corrugated Metal
Tubing and Fittings.
— ANSI Z21.45 Assembled Flexible Appliance Connectors
of Other Than All-Metal Construction
The above connectors may be used if acceptable by
the authority having jurisdiction. The Commonwealth of
Massachusetts requires that a flexible appliance connector
cannot exceed three feet in length.
Gas Supply Pressure (inches w.c.)
minimum
Natural Gas 4.5"
Propane Gas 10.8"
manifold Pressure (inches w.c.)
Natural Gas
Propane Gas
Page 8

GAS SUPPLY

Tubing, Type L
Outside diameter
Propane Natural Propane
3/8" 1/2"
9.5mm 12.7mm
1/2" 5/8"
12.7mm 15.9mm 12.7mm
1/2" 3/4"
12.7mm 19mm 12.7mm
1/2" 7/8"
12.7mm 22.2mm 1.9 mm
Figure 6
Normal maximum
7.0" 14.0"
11.0" 14.0"
Normal (HI)
3.5"
10.0"
Installing a New main Gas Shut-Off
Each appliance should have its own manual gas shut-off.
A manual main gas shut-off should be located in the vicinity of
the unit. Where none exists, or where its size or location is not
adequate, contact your local authorized installer for instal-
lation or relocation.
Compounds used on threaded joints of gas piping shall be
resistant to the action of liquefied petroleum gases. The gas
lines must be checked for leaks by the installer. This should
3/8"
be done with a soap solution watching for bubbles on all
9.5mm
exposed connections, and if unexposed, a pressure test
1/2"
should be made.
Never use an exposed flame to check for leaks. Appliance
1/2"
must be disconnected from piping at inlet of control valve
and pipe capped or plugged for pressure test. Never
pressure test with appliance connected; control valve
3/4"
will sustain damage!
NOTE: The millivolt gas controls are equipped with a captured
screw type pressure test point, therefore it is not necessary
to provide a 1/8" test point up stream of the control.
On direct ignition valves, hex plugs may be replaced with
hose fittings for pressure checks, then reinstalled before
operating fireplace.
When using copper or flex connector use only approved
fittings.
The appliance and it's individual shut off valve must be
disconnected from supply piping system during any pressure
testing of that system at test pressures in excess of 1/2 psig
(3.5kPa).
The appliance must be isolated from the gas supply piping
system by closing its individual manual shut off valve during
any pressure testing of the gas supply piping system at test
pressures equal to or less than 1/2 psig (3.5kPa).
Attention! If one of the procedures results in pressures in
excess of 1/2 psig (14" w.c.) (3.5 kPa) on the fireplace gas
valve, it will result in a hazardous condition.
38142-2-0719