Air Ducts; With Filter) - Tempstar F97CMN Installation, Start-Up, Operating And Service And Maintenance Instructions

F97CMN and G97CMN: Installation, Start-up, Operating and Service and Maintenance Instructions
than 12-in. (305 mm) above the combustible deck or suspended furnaces
closer than 12-in. (305 mm) to joists. The sheet metal MUST extend
underneath the furnace casing by 1-in. (25 mm) with the door removed.
The bottom closure panel on furnaces of widths 17-1/2-in. (445 mm) and
larger may be used for flame roll-out protection when bottom of furnace
is used for return air connection. See
roll-out shield.

AIR DUCTS

!
Many states, provinces and localities are considering or have
implemented standards and/or restrictions on duct sizing practices,
ductwork leakage, and/or ductwork thermal, airflow and electrical
efficiencies. CONSULT LOCAL CODE OFFICIALS for ductwork
design and performance requirements in your area.
General Requirements
The duct system should be designed and sized according to accepted
national standards such as those published by: Air Conditioning
Contractors Association (ACCA Manual D), Sheet Metal and Air
Conditioning Contractors National Association
American Society of Heating, Refrigerating and Air Conditioning
Engineers (ASHRAE) or consult The Air Systems Design Guidelines
reference tables available from your local distributor. The duct system
should be sized to handle the required system design CFM at the design
external static pressure. The furnace airflow rates are provided in
Table 7-Air Delivery-CFM (With Filter). When a furnace is installed so
that the supply ducts carry air circulated by the furnace to areas outside
the space containing the furnace, the return air shall also be handled by
Unit Size: 0601714 Clg/CF Switch settings
Clg Switches SW2-3
Clg Default: OFF
CF Switches SW3-3
Low-Clg Default: OFF
OFF
OFF
OFF
Cooling Airflow
ON
(SW2)
Low-Cooling
ON
Airflow (SW3)
ON
ON
Maximum Clg Airflow
CF Switches SW3-3
Cont. Fan Default: OFF
OFF
OFF
OFF
Continuous Fan
ON
Airflow (SW3)
ON
ON
ON
Maximum Heat Airflow
Heating (SW1) Intermediate Heat Airflow
Minimum Heat Airflow
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig. 25 for proper orientation of
NOTICE
(SMACNA)
4
Table 7 – Cooling and Heating Air Delivery - CFM (Bottom Return
(SW1-5 and SW4-3 set to OFF, except as indicated. See notes 1 and 2.)
SW2-2 SW2-1 0.1
OFF OFF 1060
SW3-2 SW3-1
OFF OFF 545
OFF ON 545
ON OFF 710
ON ON 875
OFF OFF 1060
OFF ON 1235
ON OFF 1235
ON ON 1235
2
1425
SW3-2 SW3-1
OFF OFF 545
OFF ON 545
ON OFF 710
ON ON 875
OFF OFF 1060
OFF ON 1060
ON OFF 1060
ON ON 1060
3
1075
3
535
3
420
duct(s) sealed to the furnace casing and terminating outside the space
containing the furnace.
Secure ductwork with proper fasteners for type of ductwork used. Seal
supply- and return-duct connections to furnace with code approved tape
or duct sealer.
NOTE: Flexible connections should be used between ductwork and
furnace to prevent transmission of vibration.
Ductwork passing through unconditioned space should be insulated to
enhance system performance. When air conditioning is used, a vapor
barrier is recommended.
Maintain a 1-in. (25 mm) clearance from combustible materials to
supply air ductwork for a distance of 36-in. (914 mm) horizontally from
the furnace. See NFPA 90B or local code for further requirements.
Return Duct Sizing
Refer to the Filter Selection and Duct Sizing section for information on
the proper selection of filter sizes and the associated ductwork and duct
transitions. Improperly designed filtering systems and return ductwork
are the most common causes of airflow and/or noise complaints in
HVAC systems.
Ductwork Acoustical Treatment
NOTE: Metal duct systems that do not have a 90 degree elbow and 10
or
ft. (3 M) of main duct to the first branch take-off may require internal
acoustical lining. As an alternative, fibrous ductwork may be used if
constructed and installed in accordance with the latest edition of
SMACNA construction standard on fibrous glass ducts. Both acoustical
lining and fibrous ductwork shall comply with NFPA 90B as tested by
UL Standard 181 for Class 1 Rigid air ducts.
NOTE: For horizontal applications, the top most flange may be bent
past 90?to allow the evaporator coil to hang on the flange temporarily
External Static Pressure (ESP)
0.2 0.3 0.4 0.5
1070 1080 1080 1075
530 520 525 510
530 520 525 510
710 710 695 690
880 890 895 895
1070 1080 1080 1075
1240 1250 1255 1255
1240 1250 1255 1255
1240 1250 1255 1255
1425 1405 1370 1335
530 520 525 510
530 520 525 510
710 710 695 690
880 890 895 895
1070 1080 1080 1075
1070 1080 1080 1075
1070 1080 1080 1075
1070 1080 1080 1075
1085 1095 1095 1090
515 505 515 495
410 415 400 380
20
5

With Filter)

0.6 0.7 0.8 0.9
1065 1050 1035 1025
See note 4
See note 4
See note 4
890 885 880 870
1065 1050 1035 1025
1250 1230 1190 1155
1250 1230 1190 1155
1250 1230 1190 1155
1300 1260 1225 1190
See note 4
See note 4
See note 4
890 885 880 870
1065 1050 1035 1025
1065 1050 1035 1025
1065 1050 1035 1025
1065 1050 1035 1025
1080 1065 1050 1035
See note 4
See note 4
1.0
1010
855
1010
1115
1115
1115
1155
855
1010
1010
1010
1010
1020