PLUS 80t with Perfect Heat™
DOWNFLOW
INDUCED-COMBUSTION FURNACE
331JAV
California Approved
Sizes 060 thru 100
Series C
The Plus 80t Downflow Furnace achieves 80 percent Annual
Fuel Utilization Efficiency (AFUE) rating. The benefits of Perfect
Heat operation in reducing sound and improving comfort put it in
a class well ahead of the competition. The Plus 80t has the kind
of overall performance needed in today’s homes. All models are
GAMA efficiency rating certified and certified for use in California
Air Quality Management Districts.
FEATURES
EFFICIENCY — The Plus 80t Induced-Combustion Gas Fur-
nace provides the efficiency customers want with 80.0% AFUE.
HOT SURFACE IGNITION — No pilot to waste gas with this
field-proven ignition system.
ALUMINIZED HEAT EXCHANGER — The patented 4-pass
heat exchanger is made of aluminized steel and backed by a
20-year Limited Warranty.
INTELLIGENT CONTROL — The Plus 80t has an intelligent
control that monitors the operation of the furnace. This control
also has a component-test feature that enables the servicing
technician to verify operation of the control; the high and low in-
ducer; the hot surface ignitor; and high-, medium-, and low-
speed blower operation. The control features a 3-amp fuse that
protects the transformer and control. We guarantee the reliability
of the control with a 3-year Limited Warranty.
40-IN. HEIGHT — The Plus 80t cabinet height is only 40 in.
This simplifies installation in alcoves, attics, basements (ideal
for short basement), closets, and utility rooms, especially with
a taller high-efficiency cooling coil.
PREPAINTED CABINET — The Plus 80t uses prepainted sheet
metal for the cabinet. This is the same high-quality finish found
on refrigerators and other appliances today. We ensure its dura-
bility by using a galvanized steel substrate to provide superior
rust protection.
PATENTED BLOCKED VENT SAFEGUARD — Our induced-
combustion furnace has a patented blocked vent safeguard. The
safeguard switch will stop furnace operation if the vent system
becomes blocked or is not operating properly. An exclusive with
the Plus 80t furnace.
EASY INSTALLATION — The Plus 80t has many features that
make installation easier: left or right gas and electrical connec-
tions, heating and cooling blower speed selector, matching coil
sizes, accessory low-voltage connections, and many more.
QUIET OPERATION — A soft mount inducer assembly and 2-
stage slow-opening gas valve reduce sound level. The Perfect
Heat operation capability minimizes furnace and air noise for
total home comfort.
Form No. PDS 331J.60.4
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SPECIFICATIONS
UNIT SIZE
036060
048080
060100
RATINGS AND PERFORMANCE
Gas Input (Btuh)*
High Stage
Low Stage
High Stage
Low Stage
63,000
40,500
51,000
33,000
80.0
84,000
54,000
69,000
44,000
80.0
105,000
67,500
86,000
55,000
80.0
Output Capacity (Btuh)†
Nonweatherized ICS
AFUE†
Nonweatherized ICS
High Stage
Certified Temperature Rise
Range (°F)
30—60
15—45
0.10/0.50
1195/1030
1195
30—60
15—45
0.15/0.50
1355/1170
1580
35—65
20—50
0.20/0.50
1735/1500
1950
Low Stage
Certified External Static Pressure
Airflow CFM
Heat/Cool
Heating High/Low
Cooling
ELECTRICAL
Unit Volts— Hertz— Phase
Operating Voltage Range
Maximum Unit Amps
115—60—1
104—127
14.2
Min—Max
10.5
35
17.9
32
Maximum Wire Length (Measured 1 Way)
Minimum Wire Size
Ft
26
14
15
12
Maximum Fuse Size
20
Transformer (24v)
40va
19va
External Control
Heating
Cooling
Power Available
35va
Air Conditioning Blower Relay
Standard
CONTROLS
Limit Control
SPST (Auto-Reset)
Heating Blower Control
Inducer
Solid-State Time Operation
2-Speed
4
Burners (Monoport)
Gas Connection Size
3
5
1/2-in. NPT
GAS CONTROLS
2-Stage Redundant Gas Valve
White-Rodgers
4.5 (Natural Gas)
13.6 (Natural Gas)
Hot Surface
Min Inlet Pressure (In. wc)
Max Inlet Pressure (In. wc)
Ignition Device
BLOWER DATA
Direct-Drive Motor HP (PSC)
1/3
5.1
1/2
7.4
3/4
Motor Full Load Amps
11.0
RPM (Nominal)—Speeds
1075—5
10 x 8
Blower Wheel Diameter x Width (In.)
Filter Size (In.)—Permanent Washable (Supplied)
10 x 6
10 x 6
(2) 14 x 20 x 1
(2) 16 x 20 x 1
DEALER-INSTALLED ACCESSORIES
Downflow Subbase**
KGASB0201ALL
KGAH5601PSW
KGANP26012SP
KGAPN21012SP
High-Altitude Pressure Switch Kit‡
Gas Conversion Kit—Natural-to-Propane
Gas Conversion Kit—Propane-to-Natural
* Gas input ratings are certified for elevations to 2000 ft. For elevations above 2000 ft, reduce ratings 4% for each 1000 ft above sea level. Refer to National
Fuel Gas Code Table F4. In Canada, derate the unit 10% for elevations 2000 ft to 4500 ft above sea level.
† Capacity in accordance with U.S. Government DOE test procedures.
‡ 5500 ft and higher above sea level.
** Required for installation on combustible floors when no coil box is used, or when any coil box other than a Bryant cased coil is used.
ICS—Isolated Combustion System
CONTROLS—THERMOSTATS AND ZONING
Auto Changeover, °F/°C, 1-Stage Heat/1-Stage cool — TSTATBBNAC01-B
Auto Changeover, °F/°C, 2-Stage Heat/1-Stage Cool — TSTATBBNHP01-B
Auto Changeover, °F/°C, 2-Stage Heat/2-Stage cool — TSTATBBN2S01-B
THERMOSTAT—NON-PROGRAMMABLE
in AC Mode, 3-Stage Heat/2-Stage Cool in HP Mode
Air Conditioner, 1-Stage Heat/1-Stage Cool, Manual Changeover, °F/°C — TSTATBBBAC01
Heat Pump, 2-Stage Heat/1-Stage Cool. Manual Changeover, °F/°C — TSTATBBBHP01*
Auto Changeover, 7-Day Programmable, °F/°C, 1-Stage heat/1-Stage cool — TSTATBBPAC01-B
Auto Changeover, 7-Day Programmable, °F/°C, 2-Stage Heat/1-Stage Cool — TSTATBBPHP01-B
Auto Changeover, 7-Day Programmable, °F/°C, — TSTATBBP2S01-B
2-Stage Heat/2-Stage Cool in AC Mode, 3-Stage Heat/2-Stage Cool in HP Mode
Dual Fuel Thermostat. Includes Outdoor Air Temperature Sensor — TSTATBBPDF01-B*
THERMOSTAT-PROGRAMMABLE
Thermidistat™ Control — Non-Programmable/Programmable — TSTATBBPRH01-B*
Thermostat with Humidity Control (For use in Dual Fuel, AC, HP, and 2S applications.
Includes Outdoor Air Temperature Sensor.)
ZONING—2-ZONE
ZONING—4-ZONE
ZONING—8-ZONE
ZONEBB2KIT01, ZONEKIT2ZBDP
ZONEBB4KIT01
ZONEBB8KIT01
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AIR DELIVERY— CFM (With Filter)
EXTERNAL STATIC PRESSURE (IN. WC)
UNIT
SIZE
BLOWER
MOTOR HP
SPEED
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
High
Med-High
Med
1435
1195
1030
900
1385
1165
1020
890
1320
1145
1010
875
1265
1105
985
1195
1070
955
1145
1015
915
1080
955
860
755
580
1000
885
790
690
525
036060
048080
060100
1/3 PSC
1/2 PSC
3/4 PSC
Med-Low
Low
855
835
795
705
700
690
675
655
625
High
Med-High
Med
Med-Low
Low
1855
1595
1355
1170
880
1765
1570
1345
1170
865
1710
1530
1305
1140
855
1665
1485
1270
1110
830
1580
1410
1220
1075
805
1570
1355
1170
1025
755
1410
1280
1110
965
1310
1200
1025
890
720
655
High
Med-High
Med
Med-Low
Low
2235
1995
1735
1510
1145
2185
1970
1735
1500
1140
2110
1915
1675
1485
1125
2030
1845
1625
1455
1115
1950
1765
1565
1400
1100
1835
1680
1480
1320
1085
1700
1545
1370
1230
1045
1540
1415
1265
1130
990
INSTALLATION
This unit is certified for downflow installation only. See Installation Manual for
important installation instructions.
MINIMUM INCHES CLEARANCE TO COMBUSTIBLE CONSTRUCTION
This forced air furnace is equipped for
This furnace is approved for DOWNFLOW installations only.
use with natural gas at altitudes
0
-
10,000 ft
(0-3,050m).
1"
An accessory kit, supplied by the
manufacturer, shall be used to convert to
propane gas use or may be required for
some natural gas applications.
This furnace is for indoor installation in
a building constructed on site.
0"
#
1"
B
This furnace may be installed on
combustible flooring in alcove or closet at
minimum clearance from combustible
material.
This furnace may be used with a Type
B-1 Vent and may be vented in common
with other gas-fired appliances.
A
E
C
D
I
K
S
E
C
A
F
N
R
U
F
T
T
N
O
R
S
E
R
V
I
C
E
F
E 30"
D
R
I
S
O
N
For installation on non-combustible
MIN
†
floors only. For installation on
combustible flooring only when
installed on special base, Part No.
KGASB0201ALL, Coil Assembly,
Part No. CD5 or CK5, or Coil
Casing, Part No. KCAKC.
##
1" #
Ø
Clearance in inches.
1"
For furnaces wider than 14.25
inches (362mm) may be 0 inches.
18 inches front clearance required
for alcove.
#
Ø
Vent Clearance to combustibles:
For Single Wall vents 6 inches (6 po).
For Type B-1 vent type 1 inch (1 po).
## For single wall vent type 6 inches.
A97620
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
UNIT MUST BE INSTALLED IN ACCORDANCE
WITH INSTALLATION INSTRUCTIONS
Cancels: PDS 331J.60.3
© 1999 Bryant Heating & Cooling Systems, 7310 W. Morris St.
Indpls., IN 46231
PRINTED IN U.S.A.
Catalog No. 5233-103 10-99
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