Bryant Furnace 351DAS User Manual

DIRECT-VENT DOWNFLOW  
CONDENSING GAS FURNACE  
for MANUFACTURED HOUSING  
351DAS  
Size 080  
Series A  
Flow-Through Secondary Heat Exchangers—Each cell is lami-  
nated with our patented EverlasticTM polypropylene for greater  
resistance to corrosion. This breakthrough in heating technology  
helps extend the life of the furnace for years of trouble-free per-  
formance.  
Warranty—Limited 20-year Warranty on the heat exchangers  
for the original owner in single family residence. Contact your  
dealer for details. Two-year limited parts and labor warranty on  
entire unit.  
Monoport Inshot Burners—Produce precise air-to-gas mixture  
which gives a clean burn. The large monoport on the inshot or  
injection-type burners seldom, if ever, needs cleaning.  
Control Center—The printed-circuit board and all internal wiring  
are factory installed. Convenient terminals permit quick-connec-  
tion of a thermostat, a humidifier, an air cleaner, and air condi-  
tioning control circuits.  
As an added feature, the control has a built-in status indicator  
and self-test feature. The status indicator flashes to indicate a  
problem condition and assists the servicer in diagnosis. The self-  
test feature allows for a complete check of the major compo-  
nents in only seconds.  
Combustion Air and Ventilation—The 351DAS advanced design  
allows Schedule 40PVC, PVC-DWV, SDR-21 PVC, SDR-26  
PVC (not approved in Canada), ABS-DWV, or ABS-F628  
Schedule 40 pipe to bring outdoor air into the furnace for com-  
bustion. The extracted heat lowers the temperature of the com-  
bustion products to a point (typically below 115°F) that any of the  
approved types of pipe can also be used for venting combustion  
products outside the structure. The combustion-air and vent  
pipes can terminate through a side wall or through the roof when  
using 1 of our approved vent termination kits.  
Utilizing the extensive resources available to Bryant, a new  
standard of excellence has been achieved with the model  
351DAS Downflow Furnace for manufactured (mobile) or  
modular homes.  
Fully-Insulated Casing—Foil-faced insulation in the heat ex-  
changer section cuts heat loss, and insulation in the blower sec-  
tion reduces noise levels. The casing also has the required  
openings for left- or right-side connection of gas, electric, drain,  
and vent connections.  
The model 351DAS is a unique downflow condensing fur-  
nace with features like no other product in its class. The  
351DAS builds on the many Bryant successes in the furnace  
industry and establishes a new standard for high-efficiency  
gas furnaces.  
Certifications—The 351DAS units are A.G.A. and C.G.A. design  
certified for use with natural and propane gases, as well as  
GAMA efficiency rating certified. The furnace is factory-shipped  
for use with natural and propane gases. (All parts necessary to  
convert the gas valve for propane gas use are shipped with the  
furnace.) Model 351DAS is design certified for installation in  
manufactured (mobile) homes.  
FEATURES  
Factory Configuration—Factory configured for downflow ap-  
plications in manufactured (mobile) or modular homes.  
The model 351DAS is available in 3 heat/airflow combina-  
tions.  
Quality Registration—The 351DAS is engineered and manu-  
factured under an ISO 9001 registered quality system.  
Sealed Combustion (Direct-Vent) System—Enclosed burner  
assembly isolates operating noise without the expense of  
sound deadening devices. The sealed combustion (direct-  
vent) system brings outdoor air directly into the combustion  
chamber, reducing infiltration of cold air into the structure and  
reducing heat loss.  
3-Pass Primary Heat Exchangers—This design accelerates  
heat transfer and extracts heat that conventional heat ex-  
changers waste up the flue. The weld-free primary heat ex-  
changers are made of aluminized steel for corrosion  
resistance.  
Form No. PDS 351D.80.1  
 
INSTALLATION  
This forced air furnace is equipped for use with natural or propane gas at altitudes 0 - 10,000 ft (0 - 3,050m).  
This furnace is for indoor installation in a manufactured (mobile) or modular home.  
This furnace may be installed on combustible flooring in alcove or closet at minimum clearance from combustible material.  
This appliance requires a special venting system. Refer to the installation instructions for parts list and method of installation. This furnace is for use with schedule-40 PVC,  
PVC-DWV, or ABS-DWV pipe, and must not be vented in common with other gas-fired appliances. Construction through which vent/air intake pipes may be installed is  
maximum 24 inches (600 mm), minimum 3/4 inches (19 mm) thickness (including roofing materials).  
Furnace must be installed level, or pitched forward within 1/2 inch of level for proper drainage. Failure will result  
in equipment or property damage.  
LEVEL (0")  
TO  
1/2" MAX  
FRONT  
DOWNFLOW  
This furnace is approved for  
DOWNFLOW installation.  
MINIMUM INCHES CLEARANCE TO  
COMBUSTIBLE CONSTRUCTION  
1"  
DOWNFLOW POSITION:  
Mimimum front clearance for service 30 inches (762mm).  
*
0"  
0"  
B
A
E
D
For installation on combustible floors only when installed on special base No. KGASB0201ALL,  
Coil Assembly, Part No. CD5 or CK5, or Coil Casing, Part No. KCAKC.  
C
I
K
S
T
N
O
R
F
MANUFACTURED MOBILE HOME STANDARDS  
S
E
R
V
This furnace must be installed in accordance with the manufacturer's instructions and Manufactured  
Home Construction and Safety Standard, Title 24 CFR, Part 3280 or, when such standard is not  
applicable, the ANSI A225.1, Standard for Manufactured Home Installation (Manufactured Home Sites,  
Communities and Set-Ups), or the Mobile Homes Standard CAN/CSA-Z240 MH Series-M86.  
I
C
E
E
F
D
*
R
I
S
30  
O
N
T
MIN  
0"  
3"  
This furnace must be installed with a direct vent (combustion air and flue) system, and use a factory  
accessory termination kit.  
0"  
Clearance in inches  
Condensate Trap  
on RIGHT Side  
Condensate Trap  
on LEFT Side  
TUBE ROUTING  
BURNER ENCLOSURE  
PRESSURE  
REFERENCE TUBE  
ASSEMBLY  
CAP / PLUG  
CAP / PLUG  
LOWER COLLECTOR BOX  
PRESSURE TUBE  
LOWER COLLECTOR  
BOX PRESSURE TUBE  
UPPER COLLECTOR  
BOX PRESSURE TUBE  
UPPER COLLECTOR BOX  
PRESSURE TUBE  
COLLECTOR BOX  
DRAIN TUBE  
GAS VALVE  
GAS VALVE  
COLLECTOR BOX  
DRAIN TUBE  
CONDENSATE TRAP  
COLLECTOR BOX EXTENSION DRAIN  
TUBE  
INDUCER HOUSING  
DRAIN TUBE  
DRAIN TUBES ROUTED IN  
INDUCER HOUSING  
DRAIN TUBE  
FRONT OF GAS VALVE  
DRAIN TUBE  
COUPLING  
CONDENSATE TRAP  
BURNER ENCLOSURE  
PRESSURE REFERENCE  
TUBE ASSEMBLY  
324997-201 REV. A / LIT  
1. All tubing must be connected securely and routed to avoid kinks and traps.  
NOTE:  
A99001e  
CONTROLS—THERMOSTATS AND ZONING  
For Use with 1-Speed Air Conditioner—TSTATBBNAC01-B  
For Use with 2-Speed Air Conditioner—TSTATBBN2S01-B  
For Use with 2-Speed Heat Pump—TSTATBBN2S01-B  
THERMOSTAT—NON-PROGRAMMABLE  
THERMOSTAT—PROGRAMMABLE  
For Use with 1-Speed Air Conditioner—TSTATBBPAC01-B  
For Use with 2-Speed Air Conditioner—TSTATBBP2S01-B  
For Use with 1-Speed Heat Pump—TSTATBBPDF01-B  
For Use with 2-Speed Heat Pump—TSTATBBP2S01-B or TSTATBBPDF01-B  
THERMIDISTAT—PROGRAMMABLE THERMOSTAT  
with Humidity Control  
TSTATBBPRH01-B  
—3—  
 
SPECIFICATIONS  
UNIT SIZE  
036080  
048080  
060080  
RATINGS AND PERFORMANCE  
Input Btuh*  
80,000  
80,000  
75,000  
80,000  
75,000  
Output Capacity† ICS  
AFUE%†  
Downflow  
75,000  
Nonweatherized ICS  
Certified Temperature Rise Range °F  
Certified External Static Pressure  
Downflow  
90.0  
40—70  
0.15  
90.0  
30—60  
0.15  
90.0  
20—50  
0.15  
Heating  
Cooling  
Heating  
Cooling  
0.50  
0.50  
0.50  
Airflow CFM‡  
1190  
1245  
1285  
1525  
1785  
1925  
ELECTRICAL  
Unit Volts—Hertz—Phase  
Operating Voltage Range Min—Max**  
Maximum Unit Amps  
115—60—1  
104—127  
10.0  
7.6  
10.4  
14  
14.1  
18.4  
12  
Unit Ampacity††  
13.4  
Minimum Wire Size  
14  
Maximum Wire Length (Ft)‡‡  
36  
28  
31  
Maximum Fuse Size or Ckt Bkr Amps  
(Time-Delay Fuse Recommended)  
15  
15  
40va  
20  
Transformer (24v)  
External Control  
Heating  
Cooling  
12va  
Power Available  
21va  
Air Conditioning Blower Relay  
CONTROLS  
Standard  
Limit Control  
SPST  
Factory Set at 135 Sec  
4
Heating Blower Control (Off Delay)  
Burners (Monoport)  
4
4
Gas Connection Size  
GAS CONTROLS  
1/2-in. NPT  
Gas Valve (Redundant/Gas Convertible)  
Manufacturer  
Min Inlet Pressure (In. wc)  
Max Inlet Pressure (In. wc)  
White-Rodgers  
4.5 (Natural Gas) 11.0 (Propane)  
13.6 (Natural and Propane Gases)  
Hot Surface  
Ignition Device  
BLOWER DATA  
Direct-Drive Motor HP (Permanent Split Capacitor)  
Motor Full Load Amps  
1/3  
5.8  
1/2  
7.9  
3/4  
11.1  
RPM (Nominal)—Speeds  
1075—4  
11 x 8  
Blower Wheel Diameter x Width (In.)  
Filter Size (In.)—Permanent Washable  
FACTORY-AUTHORIZED AND LISTED, DEALER-INSTALLED OPTIONS  
Downflow Base***  
10 x 7  
11 x 10  
(1) 16 x 25 x 1  
(1) 20 x 25 x 1  
KGASB0201ALL  
2-in.—KGAVT0101BRA  
3-in.—KGAVT0201BRA  
Vent Termination Kit (Bracket Only for 2 Pipes)  
Concentric Vent Termination Kit (Single Exit)  
2-in.—KGAVT0501CVT  
3-in.—KGAVT0601CVT  
Condensate Freeze Protection Kit  
Electronic/Mechanical Air Cleaner  
Humidifier  
KGAHT0101CFP  
Model AIRA or 902B or MACA  
Model HUM  
Heat/Energy Recovery Ventilator  
Model VA3B, VB5B, VC5B, or VL3A  
*
Gas input ratings are certified for elevations to 2000 ft. For elevations above 2000 ft, reduce ratings 2% for each 1000 ft above sea level. In Canada, derate  
the unit 5% from 2000 to 4500 ft above sea level.  
Capacity and AFUE in accordance with U.S. Government DOE test procedures.  
Airflow shown is for top only return-air supply.  
** Permissible voltage limits for proper furnace operation.  
†† Unit ampacity = 125% of largest component’s full load amps plus 100% of all other potential operating components (EAC, humidifier, etc.).  
‡‡ Length shown is measured 1 way along wire path between unit and service panel for maximum 2% voltage drop.  
*** Required for installation on combustible floors when no coil box is used, or when any coil box other than a Bryant CD5 or CK5 cased coil is used.  
ICS—Isolated Combustion System  
—4—  
 
COMBUSTION-AIR AND VENT PIPING  
MAXIMUM ALLOWABLE PIPE LENGTH (FT)  
ALTITUDE  
ABOVE SEA  
LEVEL (FT)  
NUMBER OF 90° ELBOWS  
PIPE DIA  
(IN.)*  
UNIT SIZE  
TERMINATION TYPE  
1
2
3
4
5
6
1-1/2  
2
2-1/2  
2
10  
55  
70  
49  
NA  
50  
70  
44  
NA  
35  
70  
30  
NA  
30  
70  
25  
NA  
30  
70  
25  
NA  
20  
70  
15  
036080  
048080  
060080  
0 to 2000  
2 Pipe or 2-In. Concentric  
036080  
048080  
060080  
036080  
048080  
060080  
036080  
048080  
060080  
036080  
048080  
060080  
036080  
048080  
060080  
036080  
048080  
060080  
036080  
048080  
060080  
036080  
048080  
060080  
2001 to 3000  
3001 to 4000  
4001 to 5000†  
5001 to 6000†  
6001 to 7000†  
7001 to 8000†  
8001 to 9000†  
2 Pipe or 2-In. Concentric  
2 Pipe or 2-In. Concentric  
2 Pipe or 2-in Concentric  
2 Pipe or 2-In. Concentric  
2 Pipe or 2-In. Concentric  
2 Pipe or 2-In. Concentric  
2 Pipe or 2-In. Concentric  
2 Pipe or 2-In. Concentric  
2-1/2  
2
70  
46  
70  
44  
70  
41  
70  
38  
70  
36  
66  
33  
62  
30  
57  
70  
41  
70  
39  
70  
36  
70  
33  
70  
31  
65  
28  
60  
25  
55  
70  
28  
70  
26  
70  
23  
70  
21  
68  
19  
63  
17  
58  
14  
53  
70  
23  
70  
21  
70  
18  
70  
16  
67  
14  
62  
12  
56  
9
70  
22  
70  
20  
70  
17  
70  
15  
66  
12  
60  
10  
55  
7
70  
13  
70  
11  
70  
8
2-/12  
2
2-1/2  
2
2-1/2  
2
70  
6
2-1/2  
2
64  
NA  
59  
NA  
53  
NA  
47  
2-1/2  
2
2-1/2  
2
9001 to  
10,000†  
2-1/2  
51  
49  
*
Disk usage—Unless otherwise specified, use perforated disk assembly (factory-supplied in loose parts bag).  
Vent sizing for Canadian installations over 4500 ft (1370m) above sea level are subject to acceptance by the local authorities having jurisdiction.  
NA—Not Allowed; pressure switch will not make.  
NOTES:  
1. Do not use pipe size greater than those specified in table or incomplete combustion, flame disturbance, or flame sense lockout may occur.  
2. Size both the combustion-air and vent pipe independently, then use the larger diameter for both pipes.  
3. Assume two 45° elbows equal one 90° elbow. Long radius elbows are desirable and may be required in some cases.  
4. Elbows and pipe sections within the furnace casing and at the vent termination should not be included in vent length or elbow count.  
5. The minimum pipe length is 5 ft for all applications.  
MAXIMUM ALLOWABLE EXPOSED VENT PIPE LENGTH (FT) WITH AND WITHOUT INSULATION  
IN WINTER DESIGN TEMPERATURE AMBIENT*  
WINTER DESIGN  
TEMPERATURE  
(°F)  
MAX PIPE  
DIAMETER  
(IN.)  
WITHOUT  
INSULATION  
WITH 3/8-IN. OR  
THICKER INSULATION†  
UNIT SIZE  
20  
0
2-1/2  
2-1/2  
2-1/2  
70  
47  
28  
70  
70  
70  
036080  
048080  
060080  
–20  
* Pipe length (ft) specified for maximum vent pipe lengths located in unconditioned spaces. Vent pipes located in unconditioned space cannot exceed the  
total allowable pipe length as specified in Maximum Allowable Pipe Length table.  
† Insulation thickness based on R value of 3.5 per in.  
—5—  
 
CONDENSATE TRAP  
FURNACE  
DOOR  
CONDENSATE  
TRAP  
14 OD  
COLLECTOR BOX TO  
TRAP RELIEF PORT  
1
FURNACE  
SIDE  
1
2
12 OD  
INDUCER HOUSING  
DRAIN CONNECTION  
3
4
58 OD  
COLLECTOR BOX  
DRAIN CONNECTION  
7
4
8
1
7
8
8
SCREW HOLES FOR  
DOWNFLOW (OPTIONAL)  
3
1
4
7
WIRE TIE  
GUIDES  
(WHEN USED)  
1
1
FIELD  
DRAIN  
CONN  
26  
4
1
12-IN. PVC OR CPVC  
1
2
2
4
SIDE VIEW  
FRONT VIEW  
FRONT VIEW  
SIDE VIEW  
(SHOWN ON RIGHT-HAND SIDE. MAY  
BE INSTALLED ON LEFT-HAND SIDE.)  
A98648  
MEETS DOE RESIDENTIAL CONSERVATION SERVICES  
PROGRAM STANDARDS.  
CANADIAN GAS ASSOCIATION  
ama  
®
A PPROVED  
R
Before purchasing this appliance, read important  
energy cost and efficiency information available  
from your retailer.  
As an ENERGY STARSM Partner, Bryant Heating & Cooling  
Systems has determined that this product meets the  
ENERGY STAR guidelines for energy efficiency.  
These products are engineered and manufactured under an  
ISO 9001 registered quality system.  
REGISTERED QUALITY SYSTEM  
—6—  
 
ACCESSORIES  
CONCENTRIC VENT  
B IN. DIA PVC  
VENT/EXHAUST  
F
E
C IN. DIA  
13/16  
11/2  
D
A
B IN. DIA PVC  
INTAKE/COMBUSTION AIR  
A97110  
DIMENSIONS (In.)  
PART NO.  
A*  
B
2
3
C
D†  
E
F
KGAVT0501CVT  
KGAVT0601CVT  
33-3/8  
38-7/8  
3-1/2  
4-1/2  
16-5/8  
21-1/8  
6-1/4  
7-3/8  
5-3/4  
6-1/2  
*Dimension A will change accordingly as dimension D is lengthened or shortened.  
†Dimension D may be lengthened to 60 in. maximum. Dimension D may also be shortened by  
cutting the pipes provided in the kit to 12 in. minimum.  
ACCESSORY DOWNFLOW SUBBASE  
LOCATING  
TAB  
1 1/4TYP  
PLENUM  
OPENING  
B
D
4
A
3
2
1
LOCATING  
TAB  
C
FACTORY-SUPPLIED  
1
2
3
4
FIELD-INSTALLED  
INSULATION  
A88207  
A97427  
Disassembled  
Assembled  
FURNACE  
CASING  
WIDTH  
PLENUM OPENING*  
FLOOR OPENING  
HOLE NO.  
FOR WIDTH  
ADJUSTMENT  
FURNACE IN DOWNFLOW APPLICATION  
A
B
C
D
Furnace with or without CD5 or CK5 Coil  
Assembly or KCAKC Coil Box  
17-1/2  
21  
15-1/8  
19  
16-3/4  
20-3/8  
3
2
Furnace with or without CD5 or CK5 Coil  
Assembly or KCAKC Coil Box  
18-5/8  
19  
20-1/4  
20-3/8  
* The plenum should be constructed 1/4 in. smaller in width and depth than the plenum dimensions shown above.  
—7—  
 
AIR DELIVERY—CFM (With Filter)*  
EXTERNAL STATIC PRESSURE (In. wc)  
RETURN-AIR  
SUPPLY  
UNIT SIZE  
SPEED  
0.1  
0.2  
0.3  
0.4  
0.5  
0.6  
0.7  
0.8  
High  
Med-High  
Med-Low  
Low  
1535  
1395  
1200  
1040  
1470  
1350  
1175  
1020  
1405  
1300  
1125  
990  
1330  
1225  
1065  
960  
1245  
1155  
1030  
910  
1160  
1080  
970  
1065  
985  
890  
785  
935  
880  
780  
680  
036080  
Top  
Top  
Top  
860  
High  
Med-High  
Med-Low  
Low  
1750  
1495  
1310  
1135  
1685  
1455  
1260  
1105  
1635  
1405  
1225  
1075  
1575  
1355  
1170  
1040  
1525  
1305  
1125  
995  
1445  
1250  
1095  
995  
1380  
1185  
1040  
910  
1310  
1120  
980  
048080  
060080  
860  
High  
Med-High  
Med-Low  
Low  
2200  
2100  
1815  
1560  
2175  
2025  
1760  
1555  
2085  
1945  
1720  
1515  
2025  
1865  
1670  
1460  
1925  
1785  
1620  
1435  
1820  
1700  
1550  
1390  
1735  
1620  
1480  
1340  
1635  
1540  
1405  
1270  
* A filter is required for return-air supply.  
SERVICE TRAINING  
Packaged Service Training programs are an excellent way to increase your  
knowledge of the equipment discussed in this manual, including:  
• Unit Familiarization  
• Installation Overview  
• Maintenance  
• Operating Sequence  
A large selection of product, theory, and skills programs is available, using popular  
video-based formats and materials. All include video and/or slides, plus companion  
book.  
Classroom Service Training plus "hands-on" the products in our labs can mean  
increased confidence that really pays dividends in faster troubleshooting, fewer  
callbacks. Course descriptions and schedules are in our catalog.  
CALL FOR FREE CATALOG 1-800-962-9212  
[ ] Packaged Service Training  
[ ] Classroom Service Training  
A94328  
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE  
UNIT MUST BE INSTALLED IN ACCORDANCE  
WITH INSTALLATION INSTRUCTIONS  
Cancels: New  
© 1999 Bryant Heating & Cooling Systems, 7310 W. Morris St., Indianapolis, IN 46231  
PRINTED IN U.S.A.  
Catalog No. 5235-100  
1-99  
—8—  
 

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