Gas Supply - Empire Comfort Systems VFDR18LBW10N-4 Installation Instructions And Owner's Manual

Recommended Gas Pipe Diameter
Pipe Length Schedule 40 Pipe
Inside Diameter
Nat.
0-10 feet 1/2"
0-3 meters 12.7mm
10-40 feet 1/2"
4-12 meters 12.7mm
40-100 feet 1/2"
13-30 meters 12.7mm
100-150 feet 3/4"
31-46 meters 19mm
NOTICE:
your local codes allow copper tubing or galvanized.
NOTICE: Since some municipalities have additional local
codes, it is always best to consult your local authority and
installation code.
Each appliance should have its own manual gas cock.
A manual main gas cock should be located in the vicinity
of the unit. Where none exists, or where its size or location
installation or relocation.
Compounds used on threaded joints of gas piping shall be
lines must be checked for leaks by the installer. This should
be done with a soap solution watching for bubbles on all
exposed connections, and if unexposed, a pressure test
should be made.
ance must be disconnected from piping at inlet of control
valve will sustain damage!
A gas valve and ground joint union should be installed in the gas
the National Fuel Gas Code that a drip line be installed near the gas
inlet. This should consist of a vertical length of pipe tee connected
into the gas line that is capped on the bottom in which condensation
and foreign particles may collect.
30726-0-0612

GAS SUPPLY

Tubing, Type L
Outside Diameter
L.P. Nat. L.P.
3/8" 1/2" 3/8"
9.5mm 12.7mm 9.5mm
1/2" 5/8" 1/2"
12.7mm 15.9mm 12.7mm
1/2" 3/4" 1/2"
12.7mm 19mm 12.7mm
1/2" 7/8" 3/4"
12.7mm 22.2mm 19mm
The use of the following gas connectors is recommended:
— ANS Z21.24 Appliance Connectors of Corrugated Metal
Tubing and Fittings
— ANS 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 state of Massachusetts
three feet in length.
1. To check the inlet pressure to the gas valve, a 1/8"
(3.175mm) N.P.T. plugged tapping, accessible for test
gauge connection, must be placed immediately upstream
of the gas supply connection to the appliance.
2. The appliance and its individual shutoff valve must be
-
disconnected from the gas supply piping system during
any pressure testing of that system at test pressures in
excess of 1/2 psig (3.5 kPa).
3. The appliance must be isolated from the gas supply piping
system by closing its individual manual shutoff valve during
any pressure testing of the gas supply piping system at
If the gas pressure exceeds the maximum limits listed on
page 6 of this manual or on the installed gas valve, it will
result in a hazardous condition.
Figure 11
WARNING
Page 13