Gas Supply - Empire Comfort Systems DVP20MS Installation Instructions And Owner's Manual

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
Natural
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
NOTE: Never use plastic pipe. Check to confirm whether your local
codes allow copper tubing or galvanized.
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:
— 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 Commonwealth of Massachusetts requires
that a flexible appliance connector cannot exceed three feet in length.
Page 8

GAS SUPPLY

Tubing, Type L
Outside Diameter
Propane Natural Propane
3/8" 1/2"
9.5 mm 12.7 mm 9.5 mm
1/2" 5/8"
12.7 mm 15.9 mm 12.7 mm
1/2" 3/4"
12.7 mm 19 mm 12.7 mm
1/2" 7/8"
12.7 mm 22.2 mm
Figure 1
Installing A New Main Gas Shut-Off Valve
Each appliance should have its own manual gas shut-off valve.
A manual main gas shut-off valve 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 installation
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
3/8"
checked for leaks by the installer. This should be done with a soap
solution watching for bubbles on all exposed connections, and if
1/2"
unexposed, a pressure test should be made.
Never use an exposed flame to check for leaks. Appliance must
be disconnected from piping at inlet of control valve and pipe
1/2"
capped or plugged for pressure test. Never pressure test with
appliance connected; control valve will sustain damage!
3/4"
NOTE: The gas control is equipped with a captured screw type
19 mm
pressure test point, therefore it is not necessary to provide a 1/8"
test point up stream of the control.
A gas valve and ground joint union should be installed in the gas
line upstream of the gas control to aid in servicing. It is required by
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.
When using copper or flex connector use only approved fittings.
Always provide a union so that gas line can be easily disconnected
for burner servicing.
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 (3.5 kPa).
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 (3.5 kPa).
If one of the procedures results in pressures in excess of
1/2 psig (14" w.c.) (3.5 kPa) on the stove gas valve, it will
result in a hazardous condition.
Checking Manifold Pressure
Both Propane and Natural Gas valves have a built-in pressure
regulator in the gas valve. Natural Gas models will have a manifold
pressure of approximately 3.5" w.c. (.871 kPa) for maximum input or
1.7" w.c. (.423 kPa) for minimum input at the valve outlet with the inlet
pressure to the valve from a minimum of 5.0" w.c. (1.245 kPa) for the
purpose of input adjustment to a maximum of 10.5" w.c. (2.615 kPa).
Propane Gas models will have a manifold pressure approximately
10.0" w.c. (2.49 kPa) for maximum input or 5.9" w.c. (1.469 kPa)
for minimum input at the valve outlet with the inlet pressure to the
valve from a minimum of 11.0" w.c. (2.739 kPa) for the purpose of
input adjustment to a maximum of 13.0" w.c. (3.237 kPa).
A 1/8" (3 mm) N.P.T. plugged tapping, accessible for test gauge
connection, is located on the outlet side of the gas control.
CAUTION
42603-4-0421