Service And Maintenance Procedures - Bryant 820TA Installation, Start-Up, Operating And Service And Maintenance Instructions

820TA/821TA: Installation, Start-up, Operating and Service and Maintenance Instructions
Unit Size: 66135V24 Clg/CF Switch settings
Clg Switches: SW2-8
Clg Default: OFF
OFF
OFF
OFF
ON
Cooling
ON
(SW2-8,7,6)
ON
ON
Maximum Clg Airflow
CF Switches SW2-5
Low-Clg Default: OFF
OFF
OFF
OFF
Low-Cooling
ON
(SW2-5,4,3)
ON
ON
ON
Cont. Fan Default: OFF
OFF
OFF
OFF
Continuous Fan
ON
(SW2-5,4,3)
ON
ON
ON
Heating High Heat Airflow
(SW1)
Low Heat Airflow
1.Nominal 350 CFM/ton cooling airflow is delivered with SW1-5 and SW2-2 set to OFF.
Set both SW1-5 and SW2-2 to ON for +7% airflow (nominal 370 CFM/ton).
Set SW1-5 to ON and SW2-2 to OFF for +15% airflow (nominal 400 CFM/ton).
Set SW2-2 to ON and SW1-5 to OFF for -7% airflow (nominal 325 CFM/ton).
The above adjustments in airflow are subject to motor horsepower range/capacity.
This applies to Cooling and Low-Cooling airflow, but does not affect continuous fan airflow.
2.Maximum cooling airflow is achieved when switches SW2-6, SW2-7, SW2-8 and SW1-5 are set to ON, and SW2-2 is set to OFF.
3.All heating CFM's are when comfort/efficiency adjustment switch (SW1-4) is set to OFF
4.Ductwork must be sized for high-heating CFM within the operational range of ESP. Operation within the blank areas of the chart is not recommended because high-heat operation will be
above 1.0 ESP.
5.All airflows on 21" casing size furnaces are 5% less on side return only installations.
6.Side returns for 24.5" casing sizes require two sides, or side and bottom, to allow sufficient airflow at the return of the furnace.
7.Airflows over 1800 CFM require bottom return, two-side return, or bottom and side return or excessive watt draw may result. A minimum filter size of 20 x 25"(508 x 635 mm) is required.

SERVICE AND MAINTENANCE PROCEDURES

Untrained personnel can perform basic maintenance functions such as
cleaning and replacing air filters. All other operations must be performed
by trained service personnel. A qualified service person should inspect
the furnace once a year.
WARNING
!
FIRE, INJURY OR DEATH HAZARD
Failure to follow this warning could result in personal injury, death
and/or property damage.
The ability to properly perform maintenance on this equipment requires
certain knowledge, mechanical skills, tools, and equipment. If you do
not possess these, do not attempt to perform any maintenance on this
equipment other than those procedures recommended in the User's
Manual.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Table 12 – Air Delivery - CFM (With Filter)* (Continued)
4
COOLING AND HEATING AIR DELIVERY - CFM (Bottom Return
(SW1-5 and SW2-2 set to OFF, except as indicated. See Notes 1 and 2.)
SW2-7 SW2-6 0.1
OFF OFF 2105
OFF ON 990
ON OFF 1180
ON ON 1355
OFF OFF 1535
OFF ON 1735
ON OFF 2105
ON ON 2280
2
2360
SW2-4 SW2-3
OFF OFF 990
OFF ON 800
ON OFF 990
ON ON 1180
OFF OFF 1355
OFF ON 1535
ON OFF 1735
ON ON 2105
OFF OFF 740
OFF ON 740
ON OFF 900
ON ON 1080
OFF OFF 1080
OFF ON 1080
ON OFF 1080
ON ON 1080
3
2130
3
1855
External Static Pressure (ESP)
0.2 0.3 0.4
2050 1995 1940 1880
885 780 665 570
1090 995 900 815
1270 1190 1105 1020
1465 1395 1320 1245
1670 1605 1535 1470
2050 1995 1940 1880
2225 2175 2120 2065
2310 2265 2215 2160
885 780 665 570
670 540 410 280
885 780 665 570
1090 995 900 815
1270 1190 1105 1020
1465 1395 1320 1245
1670 1605 1535 1470
2050 1995 1940 1880
605 470 360 255
605 470 360 255
775 650 525 400
980 885 785 680
980 885 785 680
980 885 785 680
980 885 785 680
980 885 785 680
2075 2020 1970 1910
1795 1730 1670 1605
ELECTRICAL OPERATION HAZARD
Failure to follow this caution may result in improper furnace operation
or failure of furnace.
Label all wires prior to disconnection when servicing controls. Wiring
errors can cause improper and dangerous operation.
ENVIRONMENTAL HAZARD
Failure to follow this caution may result in environmental pollution.
Remove and recycle all components or materials (i.e. oil, refrigerant,
control board, etc.) before unit final disposal.
36
5
With Filter)
0.5 0.6 0.7 0.8
1820 1765 1705
See Note 4
715 635 555
940 855 775
1165 1095 1025
1405 1335 1270
1820 1765 1705
2010 1955 1905
2115 2060 2010
See Note 4
See Note 4
See Note 4
715 635 555
940 855 775
1165 1095 1025
1405 1335 1270
1820 1765 1705
See Note 4
See Note 4
See Note 4
595 510 430
595 510 430
595 510 430
595 510 430
595 510 430
1855 1805 1745
1545 1480 1420
CAUTION
!
CAUTION
!
0.9 1.0
1650 1590
475 400
700 630
945 875
1205 1140
1650 1590
1850 1800
1960 1870
475 400
700 630
945 875
1205 1140
1650 1590
345 260
345 260
345 260
345 260
345 260
1690 1630
1360 1300