Volt Humidifier; Gas Supply And Piping; High Altitude Derate; Propane Gas Conversion - Goodman *MVM96 Installation Instructions Manual

call for humidity. The integrated control module electronic air
cleaner terminals (EAC) are energized with 115 volts whenever
the circulator blower is energized.
24 V H
OLT UMIDIFIER
A 24 volt humidifier can be powered by feeding one of the
HUM terminals with a field installed wire from the R terminal
or by connecting to the NO side of the low fire pressure
switch.
G S P
AS UPPLY AND IPING
The furnace rating plate includes the approved furnace gas input
rating and gas types. The furnace must be equipped to operate on
the type of gas applied. This includes any conversion kits required
for alternate fuels and/or high altitude.
T
O PREVENT UNRELIABLE OPERATION
INLET GAS SUPPLY PRESSURE MUST
RATING PLATE WITH ALL OTHER
.
OPERATING
Inlet gas supply pressures must be maintained within the ranges
specified in the following table. The supply pressure must be
constant and available with all other household gas fired appli-
ances operating. The minimum gas supply pressure must be
maintained to prevent unreliable ignition. The maximum must not
be exceeded to prevent unit overfiring.
Inlet Gas Supply Pressure
Natural Gas Minimum:
Propane Gas Minimum: 11.0" w.c.
H A D
IGH LTITUDE ERATE
In some areas the gas supplier may artificially derate the gas in
an effort to compensate for the effects of altitude. If the gas is
artificially derated, the appropriate orifice size must be deter-
mined based upon the BTU/ft
altitude. Refer to the National Fuel Gas Code, NFPA 54/ANSI
Z223.1 or CAN/CSA B149.1 in Canada, and information pro-
vided by the gas supplier to determine the proper orifice size.
P G C
ROPANE AS ONVERSION
P ,
OSSIBLE PROPERTY DAMAGE
OCCUR IF THE CORRECT CONVERSION
APPROPRIATE KITS MUST BE APPLIED
. A
FURNACE OPERATION LL CONVERSIONS
QUALIFIED INSTALLER OR SERVICE
As shipped, this unit is configured for natural gas. The appropri-
ate manufacturer'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.
CAUTION
OR EQUIPMENT DAMAGE
BE AS SPECIFIED ON THE UNIT
HOUSEHOLD GAS FIRED APPLIANCES
4.5" w.c. Maximum: 10.0" w.c.
Maximum: 13.0" w.c.
3
content of the derated gas and the
WARNING
PERSONAL INJURY OR DEATH MAY
. T
KITS ARE NOT INSTALLED
TO ENSURE SAFE AND PROPER
MUST BE PERFORMED
.
AGENCY
G V
AS ALVE
This unit is equipped with a 24 volt gas valve which modulates by
pneumatic linkage to the combustion air blower. Taps for mea-
suring the gas supply pressure and manifold pressure are provided
on the valve. This is a non-convertible, non-adjustable gas valve
equipped for natural gas.
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 the Startup Procedure &
Adjustment section of this manual for use of this control during
start up and shut down periods.
G P C
AS IPING
T
O AVOID POSSIBLE
DAMAGE DUE
,
THE /
OF NATURAL
/
THE METER TANK
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 in Canada.
Natural Gas Capacity of Pipe In Cubic Feet of Gas Per Hour (CFH)
Nominal
Actual ID:
Length (ft)
10
20
30
40
50
60
70
80
90
100
125
150
175
200
250
This chart refers to natural gas with an inlet pressure of less than 2 psi and a pressure
drop of 0.5" W.C. Specific gravity is 0.60.
HE
CFH =
BY A
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.
31
ONNECTIONS
WARNING
UNSATISFACTORY OPERATION
TO UNDERFIRING OR EQUIPMENT
PROPANE GAS PIPING NEEDED WHEN
.
TO THE FURNACE
Pipe Size (in.)
½ ¾ 1 1¼
0.622 0.824 1.049 1.380
Capacity in Cubic Feet of Gas per Hour
170 360 678 1390
118 247 466 957
95 199 374 768
81 170 320 657
72 151 284 583
65 1370 257 528
60 126 237 486
56 117 220 452
52 110 207 424
50 104 195 400
44 92 173 355
40 83 157 322
37 77 144 296
34 71 134 275
30 63 119 244
BTUH Furnace Input
Heating Valve of Gas (BTU/Cubic Foot)
OF EQUIPMENT
,
USE THE PROPER SIZE
RUNNING PIPE FROM
1½ 2 2½
1.610 2.067 2.469
2090 4020 6400
1430 2760 4400
1150 2220 3530
985 1900 3020
873 1680 2680
791 1520 2430
728 1400 2230
677 1300 2080
635 1220 1950
600 1160 1840
532 1020 1630
482 928 1480
443 854 1360
412 794 1270
366 704 1120