Goodman GMVM Service Instructions Manual page 41

OPERATION
P G C
ROPANE AS ONVERSION
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
manufacturer's propane gas conversion kit, must be applied for
propane gas installations.
LP KIT
LPKMOD06 0UF
LPKMOD08 0UF
LPKMOD10 0UF
LPKMOD11 5UF
LPKMOD06 0CF
LPKMOD08 0CF
LPKMOD10 0CF
(*= A or G)
The indicated kits must be used to insure safe and proper furnace
operation. All conversions must be performed by a qualified in-
staller, or service agency.
G P C
AS IPING ONNECTIONS
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
When sizing a trunk line, be sure to include all appliances which
will operate simultaneously when sizing a trunk line.
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.
WARNING
,
PERSONAL INJURY OR DEATH MAY
.
MODEL
*MV M960603BX
*MV M960805CX
*MV M961005DX
*MV M961155DX
*CVM960604CX
*CVM960805DX
*CVM961005DX
WARNING
,
USE THE PROPER SIZE
.
Length of
Pipe in Feet
10
20
. T
30
HE
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)
To connect the furnace to the building's gas piping, the installer
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. Re-
fer to Gas Piping Connections figure for typical gas line connec-
tions 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. Al-
ways use pipe joint compound (pipe dope) that is AP-
PROVED FOR ALL GASSES. DO NOT apply com-
pound to the first two threads.
• Use ground joint unions.
• Install a drip leg to trap dirt and moisture before it can
enter the gas valve. The drip leg must be a minimum
of three inches long.
• Install a 1/8" NPT pipe plug fitting, accessible for test
gage connection, immediately upstream of the gas
supply connection to the furnace.
• Always use a back-up wrench when making the con-
nection to the gas valve to keep it from turning. The
orientation of the gas valve on the manifold must be
maintained as shipped from the factory. Maximum
torque for the gas valve connection is 375 in-lbs; ex-
cessive over-tightening may damage the gas valve.
• Install a manual shutoff valve between the gas meter
and unit within six feet of the unit. If a union is in-
stalled, the union must be downstream of the manual
shutoff valve, between the shutoff valve and the furnace.
Natural Gas Capacity of Pipe
In Cubic Feet of Gas Per Hour (CFH)
Nominal Black Pipe Size
1/2" 3/4" 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
1 1/4" 1 1/2"
1050 1600
730 1100
590 980
500 760
440 670
400 610
370 560
350 530
320 490
305 460
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