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SYSTEM OPERATION
PROPANE GAS CONVERSION
P
OSSIBLE PROPERTY DAMAGE
OCCUR IF THE CORRECT CONVERSION KITS ARE NOT INSTALLED
APPROPRIATE KITS MUST BE APPLIED TO ENSURE SAFE AND PROPER
. A
FURNACE OPERATION
LL CONVERSIONS MUST BE PERFORMED BY A
QUALIFIED INSTALLER OR SERVICE AGENCY
This unit is configured for natural gas. The appropriate man-
ufacturer's propane gas conversion kit, must be applied for
propane gas installations. Refer to the Propane Gas and/or
High Altitude Installations for details.
Consult the furnace Specification Sheet for a listing of appro-
priate kits. The indicated kits must be used to insure safe and
proper furnace operation. All conversions must be performed
by a qualified installer, or service agency.
GAS VALVE
This unit is equipped with a 24 volt gas valve controlled
during furnace operation by the integrated control module.
As shipped, the valve is configured for natural gas. The valve
is field convertible for use with propane gas by replacing the
regulator spring with a propane gas spring from an appro-
priate manufacturer's propane gas conversion kit. Taps for
measuring the gas supply pressure and manifold pressure
are provided on the valve.
The gas valve has a manual ON/OFF control located on the
valve itself. This control may be set only to the "ON" or "OFF"
position. Refer to the lighting instructions label or Startup
Procedure & Adjustment for use of this control during start
up and shut down periods.
T
O AVOID POSSIBLE UNSATISFACTORY OPERATION OF EQUIPMENT
DAMAGE DUE TO UNDERFIRING OR EQUIPMENT
/
OF NATURAL
PROPANE GAS PIPING NEEDED WHEN RUNNING PIPE FROM
/
THE METER
TANK TO THE FURNACE
38
WARNING
,
PERSONAL INJURY OR DEATH MAY
.
WARNING
,
USE THE PROPER SIZE
.
Gas Piping Connections
Length of
. T
HE
Pipe in Feet
10
20
30
40
50
60
70
80
90
100
(Pressure 0.5 psig or less and pressure drop of 0.3" W.C.; Based on
0.60 Specific gravity Gas)
CFH = BTUH Furnace Input _______________
Heating Value of Gas (BTU/Cubic Foot)
The gas piping supplying the furnace must be properly sized
based on the gas flow required, specific gravity of the gas,
and length of the run. The gas line installation must comply
with local codes, or in their absence, with the latest edition of
the National Fuel Gas Code, NFPA 54/ANSI Z223.1 or CAN/
CSA B149.1-15.
To connect the furnace to the building's gas piping, the install-
er must supply a ground joint union, drip leg, manual shutoff
valve, and line and fittings to connect to gas valve. In some
cases, the installer may also need to supply a transition piece
from 1/2" pipe to a larger pipe size.
The following stipulations apply when connecting gas piping.
Refer to Gas Piping Connections figure for typical gas line
connections to the furnace.
• Gas piping must be supported external to the furnace
cabinet so that the weight of the gas line does not distort
the burner rack, manifold or gas valve.
•
Use black iron or steel pipe and fittings for building piping.
Where possible, use new pipe that is properly chamfered,
reamed, and free of burrs and chips. If old pipe is used,
be sure it is clean and free of rust, scale, burrs, chips,
and old pipe joint compound.
•
Use pipe joint compound on male threads ONLY. Always
use pipe joint compound (pipe dope) that is APPROVED
FOR ALL GASES. DO NOT apply compound to the first
two threads.
Natural Gas Capacity of Pipe
In Cubic Feet of Gas Per Hour (CFH)
Nominal Black Pipe Size
"
"
"
½
¾
1
132
278
520
92
190
350
73
152
285
63
130
245
56
115
215
50
105
195
46
96
180
43
90
170
40
84
160
38
79
150
_________
1¼"
1 ½"
1050
1600
730
1100
590
980
500
760
440
670
400
610
370
560
350
530
320
490
305
460
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