Goodman Amana AMH8 Service Instructions Manual page 35

PRODUCT DESIGN
24 VOLT HUMIDIFIER
The yellow wire connected to the I.D. Blower pressure
switch is powered anytime the pressure switch is closed
and provides 24 VAC humidifier control. Remove the yel-
low wire and connect the supplied brown jumper wire to
the pressure switch terminal. Reconnect the yellow wire
to the "piggyback" terminal on the brown jumper and
then connect the 24 VAC line of the humidifier to the
stripped end of the brown wire. Using a wire nut or a
field-supplied quick connect terminal can make this con-
nection. The wiring must conform to all local and na-
tional codes. Connect the COM side of the humidifier to
the B/C terminal on the furnace control board (or to the
COM side of the 24 VAC transformer). DO NOT CONNECT
115V HUMIDIFIER TO THESE TERMINALS.
If it is necessary for the installer to supply additional
line voltage wiring to the inside of the furnace, the wir-
ing must conform to all local codes, and have a mini-
mum temperature 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.
24 VOLT THERMOSTAT WIRING
NOTE: Low voltage connections can be made through
either the right or left side panel. Wire routing must not
interfere with circulator blower operation, filter removal,
or routine maintenance.
A 40 V.A. transformer and an integrated electronic con-
trol are built into the furnace to allow use with most
cooling equipment. Consult the wiring diagram, located
in the Technical Manual or on the blower door for fur-
ther details of 115 Volt and 24 Volt wiring.
THERMOSTAT WIRING - "H" MODEL
The "H" model furnace will have a "W" terminal and will
use a single stage thermostat. The following drawing
illustrates the typical field wiring for a
stage system and a single stage heating/single stage
cooling system. Refer to the following figures for proper
connections to the integrated control module.
Heating
Room
Thermostat
Typical Field Wiring (24 VAC Control Circuit)
CONTINUOUS FAN OPERATION
"H" MODEL
The "H" model
circulator fan speed when the fan switch on the thermo-
stat is turned to the "ON" position.
CIRCULATOR BLOWER SPEED ADJUSTMENT
HIGH VOLTAGE
D
ISCONNECT
M
ULTIPLE POWER SOURCES MAY BE PRESENT.
SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
Connect the correct motor leads to the COOL, HIGH
HEAT, LOW HEAT, and PARK terminals. If the heating
speed equals cooling speed, use the jumper wire pro-
vided. All unused motor leads that are not connected to
"PARK" terminals on the control must be taped to pre-
vent shorts.
CIRCULATING AIR AND FILTERS
DUCTWORK - AIR FLOW
Duct systems and register sizes must be properly de-
signed for the C.F.M. and external static pressure rat-
ing of the furnace. Ductwork should be designed in ac-
cordance with the recommended methods of "Air Condi-
tioning Contractors of America" manual D.
A duct system should be installed in accordance with
heat only single
Standards of the National Board of Fire Underwriters
for the Installation of Air Conditioning, Warm Air Heat-
ing and Ventilating Systems, Pamphlets No. 90A and 90B.
Heating/Cooling
Room Thermostat
W W
Furnace
Control
furnace control will energize the low heat
WARNING
ALL
POWER BEFOR CHANGING SPEED TAPS.
Remote
Condensing
Unit
Furnace
Control
F
AILURE TO DO
35