43
Rev. 2
PRODUCT DESIGN
To install the dehumidistat, wire the hot side of the
dehumidistat (typically, the black lead) to the screw termi-
nal marked “DEHUM” on the air circulating motor interface
board (see Air Circulating Motor Interface figure below). Wire
the neutral side of the dehumidistat (typically, the white lead)
to the screw terminal marked “R1” on the air circulating motor
interface board. If there is a ground wire on the dehumidistat
(typically, a green wire), ground the wire to the junction box
on the wall.
To activate the dehumidify function on the air circulating motor
interface board, cut the jumper wire labeled ”CUT TO EN-
ABLE”, located inside the box labeled “DEHUMIDIFY” on
the interface board (see Air Circulating Motor Interface fig-
ure below ). Once the wire is cut, the dehumidify function is
enabled on a combination call for cooling and dehumidifica-
tion.
G
Y1
Y/Y2
C2
C1
O
CFM
ADJUST
NORM
( )
+
(-)
TEST
HEAT
A
B
C
D
COOL
A
B
C
D
CUT TO
ENABLE
DEHUMIDIFY
R2
EM/W2 W1
R1
DEHUM
JW03
VSPD
Y/Y2
G
R3
Air Circulating Motor Interface Board
Fossil Fuel Applications
The GUIV furnace can be used in conjunction with a heat
pump in a fossil fuel application. A fossil fuel application is
where an outdoor temperature sensor determines the most
cost efficient means of heating (heat pump, gas furnace, or
both).
A heat pump thermostat with three stages of heat is re-
quired to properly use the two-stage furnace with a heat
pump. Refer to the fossil fuel kit installation manual for addi-
tional thermostat requirements.
To install, strictly follow the wiring guidelines in the fossil
fuel kit installation. Do not connect the “O” and “EM” lines
from the heat pump or thermostat directly to the “O” and
“EM/W2” terminals on the air circulating motor interface
board. All connections to the furnace must be to the two-
stage integrated furnace control board and must wire to the
“FURNACE” terminal strip on the fossil fuel control board.
Space provisions on the control panel have been made to
fasten to the Amana FFK03A Fossil Fuel Control Board to
the furnace control panel (see FFK03A Fossil Fuel Mount-
ing Kit Location figure below) using two #8, 3/4” long, sheet
metal screws.
FFK03A
Fossil Fuel Kit
Mounting Location
Air Circulating
Motor Interface
Board
Integrated
Furnace
Control
Amana FFK03A Fossil Fuel Kit Mounting Location
CONTINUOUS FAN OPERATION
Single Stage Furnace
The single stage furnace control will energize the cooling
circulator fan speed when the fan switch on the thermostat
is turned to the "ON" position.
GUIS/GCIS Two Stage Furnace
The two stage furnace control will energize the low heat cir-
culator fan speed when the fan switch on the thermostat is
turned to the “ON” position. This fan speed will provide circu-
lation with less electricity than conventional single stage
equipment.
Note: For two stage heat only (no cooling) applications, the
continuous fan speed may be increased by jumpering “Y” to
“G”. Thermostat must have a ”G” terminal to make use of
this feature.
GUIV Variable Speed, Two Stage Furnace
There are two speeds for continuous fan. The speeds are
dependant on how “G” from the thermostat is connected.
1. If “G” from the thermostat is connected to “G” on the
two-stage integrated furnace control (Thermostat Wiring
Figure B), the continuous fan speed will be the same as
the low stage heating speed selected. The low stage
heating speed can be selected from four speeds on the
air circulating motor interface board (Heat A, Heat B,
Heat C, or Heat D). Refer to the following Speed Tap
Adjustments figure.
