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115-V FIELD-
SUPPLIED
DISCONNECT
BLK
BLK
WHT
WHT
GND
GREEN
DEHUM
NOTE 6
VOLTS—
UNIT SIZE
HERTZ—
PHASE
060-12
115—60—1
080-16
115—60—1
100-20
115—60—1
120-20
115—60—1
* Permissible limits of the voltage range at which the unit will operate satisfactorily.
† Time-delay fuse is recommended.
‡ Length shown is as measured along wire path between unit and service panel for maximum 2 percent voltage drop.
SETUP
SWITCH NO.
SW-1
Only High-Gas Heat
SW-2
Low-Gas Heat (Adaptive Mode)
SW-3 and SW4
VENTING
Refer to the enclosed Installation Instructions, (Vent Tables For 1-
and 2-Stage Category I Fan-Assisted Furnaces) for quick, easy
reference and national or local code such as NFGC in the United
States, or NSCNGPIC in Canada, for proper vent sizing and
installation requirements.
After fully assembling the vent connector to the furnace flue collar,
securely fasten the vent connector to the collar with 2 field-
supplied, corrosion-resistant, sheet metal screws located 180
degrees apart and midway up the collar.
NOTE 2
W
FIVE
WIRE
THREE-WIRE
HEATING-
ONLY
W2
COM
W/W1
NOTE 1
Y/Y2
JUNCTION
BOX
R
CONTROL
G
AFS
24-V
Y1
TERMINAL
BLOCK
FURNACE
NOTE 5
O
Fig. 16—Heating and Cooling Application Wiring Diagram:
1-Stage Thermostat and Single-Speed Condensing Unit
Table 5—Electrical Data
OPERATING
VOLTAGE RANGE
Max*
Min*
127
104
127
104
127
104
127
104
Table 6—Setup Switch Description
NORMAL
POSITION
OFF (Staged Gas Heat)
OFF (Single-Stage Thermostat)
OFF, ON
1-STAGE
THERMOSTAT
C
Y
R
G
TERMINALS
CONDENSING
NOTE 4
NOTES: 1.
Connect Y/Y2-terminal as shown for proper operation.
2.
Some thermostats require a "C" terminal connection as shown.
3.
If any of the original wire, as supplied, must be replaced, use
same type or equivalent wire.
4.
Y1 is not to be connected.
5.
Connect O to thermostat-O only for heat pump applications.
6.
Field-supplied humidistat for dehumidification in cooling (optional).
MAX
MIN
UNIT
WIRE
AMPS
GAGE
10.1
14
10.6
14
12.6
14
13.9
14
Turn switch on to obtain only high-gas-heat operation on
any call for heat regardless of whether R-W/W1, or
R-W/W1, -W2 is closed. SW-1 overrides SW-2.
Turn switch off for installations with single-stage thermo-
stats; control selects low-gas-heat or high-gas-heat opera-
tion based on previous cycles. Turn switch on for installa-
tions with 2-stage thermostats to permit only low-gas-heat
operation in response to closing R-W/W1. High-gas heat is
supplied only when R to W/W1 and W2 are closed.
Switches control gas heating mode blower-off delay. (See
The horizontal portion of the venting system shall maintain a
minimum of 1/4-in. upward slope per linear ft and it shall be
rigidly supported every 5 ft or less with hangers or straps to ensure
that there will be no movement after installation.
START-UP, ADJUSTMENT, AND SAFETY CHECK
Step 1—General
The furnace must have a 115-v power supply properly connected
and grounded. Correct polarity must be maintained to enable gas
heating operation.
12
FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-V WIRING
FIELD-SUPPLIED
FUSED DISCONNECT
208/230- OR
460-V
THREE
PHASE
208/230-V
SINGLE
PHASE
GND
UNIT
MAX WIRE
LENGTH (FT)‡
CKT BKR AMPS†
36
34
29
26
DESCRIPTION
OF USE
Table 7.)
A99231
MAX FUSE OR
15
15
15
15
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