Amana GUIA Series Service Instructions Manual page 64

PRODUCT DESIGN
Thermostat Wiring - 80% GUIV-CA/DX & 90% GUVA-
AX Two-Stage Variable Speed Furnaces
As a two-stage furnace, the furnace's integrated control
module and/or circulator blower interface board provide ter-
minals for both "W1" and "W2", and "Y1" and "Y/Y2" ther-
mostat connections. This allows the furnace to support the
following system applications: 'Two-Stage Heating Only',
'Two-Stage Heating with Single-Stage Cooling', and 'Two-
Stage Heating with Two-Stage Cooling'. Refer to the fol-
lowing figures and also the table on the following page for
proper connections to the integrated control module and/or
circulator blower interface board. Options applicable to the
connection of "Y" and "G" from the thermostat are discussed
in Circulator Blower Timings and Continuous Fan Opera-
tion section of this manual.
Two-Stage Heating
Thermostat
G
)
(G (G )
e a
R
W2 W1
B/C G R Y W2 W1
Two-Stage Integrated
Control Module
(Furnace)
Two-Stage Heating Only Application
Two-Stage Heating/
Single-Stage Cooling
Thermostat
G
)
(G
(G
a
c
R
Y
W2 W1
)
(Y
b
)
(Y
a
B/C G R Y W2 W1
Y/Y2
)
(Y
a
Two-Stage Integrated Circulator Blower
Control Module Interface Board
(Furnace)
Two-Stage Heating with Single-Stage Cooling
64
Rev. 1
(G )
NOTES: *
Indicate connection options.
Refer to Circulator Blower Timings and
Speeds Cooling Operation, and
(G ) (G )
d b
Continuous Fan Operation Section
for details concerning "G" and "Y"
connection options.
Y1 G R1 DE
Y/Y2
Circulator Blower
Interface Board
(Furnace)
(G )
*
NOTES: Indicate connection options
(Y )
*
Refer to Circulator Blower Timings
and Speeds Cooling Operation and
)
)
(G
b
Continuous Fan Operation Section
for details concerning "G" and "Y"
connection options.
Y1 G R1 DE Y C
)
(Y
b
Single-Stage
Remote Condensing
(Furnace) Unit
Two-Stage Heating/
Two-Stage Cooling
Thermostat
G
(G )
a
R Y1
Y/Y2
W2 W1
(Y )
e
(Y )
d
B/C G R Y W2 W1 Y/Y2
(Y )
(Y )
e
d
Two-Stage Integrated Circulator Blower
Control Module Interface Board
(Furnace)
Two-Stage Heating with Two-Stage Cooling
Typical Field Wiring for GUIV-CA/DX & GUVA-AX
Two-Stage Variable Speed Gas Furnaces
(24VAC Control Circuit)
Thermostat Wiring - 90% GUVA-BX Two-Stage
Variable Speed Furnaces
As a two-stage furnace, the furnace's integrated control mod-
ule and/or circulator blower interface board provide termi-
nals for both "W1" and "W2", and "YLO" and "Y" thermostat
connections. This allows the furnace to support the follow-
ing system applications: 'Two-Stage Heating Only', 'Two-
Stage Heating with Single-Stage Cooling', and 'Two-Stage
Heating with Two-Stage Cooling'. Refer to the following fig-
ures for proper connections to the integrated control mod-
ule and/or circulator blower interface board.
Y
G
O Y B/C G
YLO
Y C
Remote
Condensing Unit
(Single-Stage Cooling)
Single-Stage Heating with Single-Stage Cooling
NOTE: To apply a single-stage heating thermostat, the
thermostat selector jumper on the integrated Control
module must be set on single stage.
(G )
*
Indicate connection options.
NOTES:
(Y )
*
Refer to Circulator Blower Timings and
Speeds Cooling Operation and
(G )
b
Continuous Fan Operation Section for
details concerning "G" and "Y"
connection options.
Y1 G R1 DE Y1 Y2 C
(Y )
b
Two-Stage
Condensing Unit
(Furnace)
Thermostat
Single-Stage Heating
with
Single-Stage Cooling
W
R
Furnace Integrated
DEHUM
R W1 W2
TWIN
Control Module
NEU
HOT Dehumidistat
[Optional]