Carrier N92ESN - Air Delivery and Blower Speed Settings

N92ESN: Installation, Start-up, Operating and Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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exchangers so that radiant heat does not affect thermometer
readings. This is particularly important with straight run ducts.
2. When thermometer readings stabilize, subtract return-air
temperature from supply-air temperature to determine temperature
rise.
If the temperature rise is outside this range, check the following:
1. Gas input rate.
2. Derate for altitude, if applicable.
3. Return and supply ducts for excessive restrictions causing static
pressures greater than 0.50-in. w.c. (125 Pa)
4. Adjust temperature rise by adjusting blower speed. Reference
Table 21 - Air Delivery for available heating airflow ranges.
• Increase blower speed to reduce temperature rise.
• Decrease blower speed to increase temperature rise.
(Read following caution before changing taps).
Change the blower heat taps as required to maintain proper temperature
rise for Heating and Cooling as described above. To change blower
motor speed selections for heating mode, remove blower motor lead
from control HEAT terminal. See Fig. 36. Select desired blower motor
speed lead from one of the other motor leads and relocate it/them to
HEAT (heating blower tap) terminal(s). Reconnect original lead on
SPARE terminal.
Adjust Blower Off Delay (Heat Mode)
If desired, the main blower off time delay period may be lengthened or
shortened when operating in the heating mode to provide greater
comfort. For position and location of jumpers on control center, see
Fig. 36 and Fig. 72.
The blower off delay has four adjustable settings from 90 sec to 180 sec.
See Table 20. The blower off delay jumpers are located on the furnace
control See Fig. 36 and Fig. 72. To change the blower off delay setting,
move the jumper from one set of pins on the control to the pins used for
the desired blower off delay. Factory blower off delay setting is 120 sec.
Table 20 – Blower Off Delay Jumper Positions
WARNING
!
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury or death.
Disconnect 115vac electrical power before changing speed tap.
CAUTION
!
UNIT DAMAGE HAZARD
To avoid operating outside the rise range and avoid component damage:
Refer to the Air Delivery Tables to determine which airflows and
settings are allowed for proper heating airflow. DO NOT use the
highlighted settings for Heating airflow. The highlighted settings are to
be used for Cooling and Continuous Fan ONLY.
PINS 1 AND 2 2 AND 3 3 AND 4 4 AND 5
Time (in sec.) 90 120 150 180
Table 21 – Air Delivery - CFM (With Filter)
FURNACE
SIZE
SPEED
TAPS
Function
EXTERNAL STATIC PRESSURE (IN.W.C.)
0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00
0401410
Gray Cooling. Do not use for heating 1120 1085 1055 1015 985 950 915 880 850 815
Yellow Cooling. Do not use for heating 925 885 850 810 775 735 695 660 620 580
Blue
3
Heating or alt Cooling 765 725 685 640 605 565 525 475 430 375
Orange
3
Alt Cooling or alt Heating 750 710 665 625 585 545 500 455 405 350
Red
3, 7
Alt Cooling. Do not use for heating 510 435 400 345 290 230 190 145 - -
0401712
Gray Cooling. Do not use for heating 1120 1090 1055 1020 985 950 915 875 840 805
Yellow Cooling. Do not use for heating 910 880 845 800 760 720 680 640 595 555
Orange Alt Cooling or alt Heating 835 795 760 720 680 630 585 540 505 475
Blue
3
Heating or alt Cooling 740 700 660 610 565 520 475 440 405 365
Red
3, 7
Alt Cooling. Do not use for heating 555 500 445 395 350 315 260 205 - -
0601412
Gray Cooling. Do not use for heating 1165 1140 1110 1080 1035 1000 960 920 870 825
Blue Heating or alt Cooling 1105 1085 1050 1010 975 930 890 845 795 755
Yellow Alt Cooling or alt Heating 1040 1000 960 920 880 840 785 740 690 640
Orange
3
Alt Cooling or alt Heating 840 795 750 705 655 610 555 500 450 395
Red
3
Alt Cooling. Do not use for heating 745 615 555 510 450 390 340 290 230 195
0601714
Gray Cooling. Do not use for heating 1335 1300 1275 1230 1190 1135 1090 1040 985 925
Yellow Alt Cooling or alt Heating 1170 1135 1095 1045 995 940 890 825 770 700
Blue
3
Heating or alt Cooling 1010 965 910 855 800 735 675 615 555 505
Orange
3
Alt Cooling or alt Heating 960 905 855 800 740 675 615 555 505 460
Red
3
Alt Cooling. Do not use for heating 910 735 675 605 535 485 430 375 330 265
0801716
Gray Cooling. Do not use for heating 1545 1505 1460 1420 1365 1320 1275 1225 1180 1135
Blue Heating or alt Cooling 1375 1330 1275 1225 1175 1125 1075 1025 970 920
Yellow
3
Alt Cooling or alt Heating 1195 1140 1090 1040 985 930 875 815 765 705
Orange
3
Alt Cooling. Do not use for heating 1015 955 900 845 780 730 670 615 550 490
Red
3, 7
Alt Cooling. Do not use for heating 945 735 575 520 450 375 325 260 - -