PRODUCT DESIGN
39
Rev. 0
115 Volt Line Connection of Accessories (Humidifier
and Electronic Air Cleaner)
WARNING
To avoid electrical shock, injury or death, disconnect
electrical power before servicing, or changing any elec-
trical wiring.
The furnace’s integrated control module is equipped with
line voltage accessory terminals for controlling power to an
optional field-supplied humidifier and/or electronic air
cleaner.
Accessory Load Specifications
Humidifier
1.0 Amp maximum at 120 VAC
Electronic Air Cleaner
1.0 Amp maximum at 120 VAC
Turn OFF power to the furnace before installing any acces-
sories. Follow the humidifier or air cleaner manufacturers’
instructions for locating, mounting, grounding, and control-
ling these accessories. Accessory wiring connections are
to be made through the 1/4" quick connect terminals pro-
vided on the furnace integrated control module. The hu-
midifier and electronic air cleaner hot and neutral terminals
are identified as HUM and EAC. All field wiring must con-
form to applicable codes. Connections should be made as
shown below.
ELECTRONIC
AIR CLEANER
HUMIDIFIER
OPTIONAL
ACCESORIES
12 PIN
CONNECTOR
120 VAC
NEUTRAL
TERMINALS
HUM-N
EAC-N
HU
M-H
EA
C-
H
120 VAC
HOT AND
PARK
TERMINALS
INTEGRATED
CONTROL
MODULE
Accessories Wiring
If it is necessary for the installer to supply additional line
voltage wiring to the inside of the furnace, the wiring must
conform to all local codes, and have a minimum tempera-
ture rating of 105°C. All line voltage wire splices must be
made inside the furnace junction box.
The integrated control module humidifier terminals (HUM)
are energized with 115 volts whenever the induced draft
blower is energized. The integrated control module elec-
tronic air cleaner terminals (EAC) are energized with 115
volts whenever the circulator blower is energized.
Gas Supply and Piping
General
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 alti-
tude.
CAUTION
To prevent unreliable operation or equipment damage,
the inlet gas supply pressure must be as specified on
the unit rating plate with all other household gas fired
appliances operating.
Inlet gas supply pressures must be maintained within the
ranges specified below. The supply pressure must be con-
stant 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:5.0" W.C. Maximum :10.0" W.C.
Propane Gas
Minimum:11.0" W.C. Maximum :13.0" W.C.
High Altitude Derate
When this furnace is installed at high altitude, the appropri-
ate High Altitude orifice kit must be applied. This is required
due to the natural reduction in the density of both the gas
fuel and combustion air as altitude increases. The kit will
provide the proper design certified input rate within the speci-
fied altitude range.
High altitude kits are purchased according to the installa-
tion altitude and usage of either natural or propane gas.
Refer to the
S-19 HIGH ALTITUDE APPLICATION (USA)
section located in the
SERVICING section of this manual
or an Amana distributor for a tabular listing of appropriate
altitude ranges and corresponding manufacturer’s high al-
titude (Natural, propane gas, and/or Pressure Switch) kits.
Do not derate the furnace by adjusting the manifold pres-
sure to a lower pressure than specified on the furnace rat-
ing plate. The combination of the lower air density and a
lower manifold pressure will prohibit the burner orifice from
drawing the proper amount of air into the burner. This may
cause incomplete combustion, flashback, and possible yel-
low tipping.
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 determined based upon the BTU/ft
3
content of the
derated gas and the altitude. Refer to the National Fuel
Gas Code, NFPA 54/ANSI Z223.1, and information pro-
vided by the gas supplier to determine the proper orifice
size.
