Gas Supply - Empire Comfort Systems VFD10CC series Owner's Manual

Recommended Gas Pipe Diameter
Pipe Length Schedule 40 Pipe
Inside Diameter
Nat.
0-10 feet 1/2"
0-3 meters 12.7 mm
10-40 feet 1/2"
4-12 meters 12.7 mm
40-100 feet 1/2"
13-30 meters 12.7 mm
100-150 feet 3/4"
31-46 meters 19 mm
NOTICE:
NOTICE: Since some municipalities have additional local codes, it is
contact your local authorized installer for installation or relocation.
solution watch
be disconnected from piping at inlet of control valve and pipe
capped or plugged for pressure test. Never pressure test with
inlet. This should consist of a vertical length of pipe tee connected
and foreign particles may collect.
The use of the following gas connectors is recommended:
and Fittings
Than All-Metal Construction
appliance connector cannot exceed three feet in length.
Page 8

GAS SUPPLY

Outside Diameter
L.P. Nat. L.P.
3/8" 1/2" 3/8"
9.5 mm 12.7 mm 9.5 mm
1/2" 5/8" 1/2"
12.7 mm 15.9 mm 12.7 mm
1/2" 3/4" 1/2"
12.7 mm 19 mm 12.7 mm
1/2" 7/8" 3/4"
12.7 mm 22.2 mm 19 mm
ll sustain damage!
to the appliance.
disconnected from the gas supply piping system during any
pressure testing of that system at test pressures in excess of
any pressure testing of the gas supply piping system at test
Attention!
it will result in a hazardous condition.
Natural gas will have a manifold pressure of approximately
minimum input at the pressure regulator outlet with the inlet pressure
for the purpose of input adjustment to a maximum of 10.5" w.c.
for minimum input at the pressure regulator outlet with the inlet
pressure to the pressure regulator from a minimum of 11.0" w.c.
NOTICE:
pressure test point, therefore it is not necessary to provide a 1/8"
test point up stream of the control.
A test gauge connection is located downstream of the gas appliance
pressure regulator for measuring gas pressure. The connection is
a 1/8 inch (3 mm) N.P.T. plugged tapping.
Figure 1
29560-0-0312