Carrier N92ESN Installation, Start-Up, Operating And Service And Maintenance Instructions page 52

N92ESN: Installation, Start-up, Operating and Service and Maintenance Instructions
exchangers so that radiant heat does not affect thermometer
readings. This is particularly important with straight run ducts.
2. When thermometer readings
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.
WARNING
!
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury or death.
Disconnect 115vac electrical power before changing speed tap.
(Read following caution before changing taps).
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.
FURNACE SPEED
SIZE TAPS
Gray
Yellow
3
Blue
0401410
3
Orange
3, 7
Red
Gray
Yellow
Orange
0401712
3
Blue
3, 7
Red
Gray
Blue
Yellow
0601412
3
Orange
3
Red
Gray
Yellow
3
Blue
0601714
3
Orange
3
Red
Gray
Blue
3
Yellow
0801716
3
Orange
3, 7
Red
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
stabilize, subtract return-air
Table 21 – Air Delivery - CFM (With Filter)
Function
Cooling. Do not use for heating
Cooling. Do not use for heating
Heating or alt Cooling
Alt Cooling or alt Heating
Alt Cooling. Do not use for heating
Cooling. Do not use for heating
Cooling. Do not use for heating
Alt Cooling or alt Heating
Heating or alt Cooling
Alt Cooling. Do not use for heating
Cooling. Do not use for heating
Heating or alt Cooling
Alt Cooling or alt Heating
Alt Cooling or alt Heating
Alt Cooling. Do not use for heating
Cooling. Do not use for heating
Alt Cooling or alt Heating
Heating or alt Cooling
Alt Cooling or alt Heating
Alt Cooling. Do not use for heating
Cooling. Do not use for heating
Heating or alt Cooling
Alt Cooling or alt Heating
Alt Cooling. Do not use for heating
Alt Cooling. Do not use for heating
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
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.
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
PINS 1 AND 2
Time (in sec.) 90
EXTERNAL STATIC PRESSURE (IN.W.C.)
0.10 0.20 0.30 0.40
1120 1085 1055 1015
925 885 850 810
765 725 685 640
750 710 665 625
510 435 400 345
1120 1090 1055 1020
910 880 845 800
835 795 760 720
740 700 660 610
555 500 445 395
1165 1140 1110 1080 1035 1000
1105 1085 1050 1010
1040 1000 960 920
840 795 750 705
745 615 555 510
1335 1300 1275 1230 1190 1135 1090 1040
1170 1135 1095 1045
1010 965 910 855
960 905 855 800
910 735 675 605
1545 1505 1460 1420 1365 1320 1275 1225 1180 1135
1375 1330 1275 1225 1175 1125 1075 1025
1195 1140 1090 1040
1015 955 900 845
945 735 575 520
52
Fig. 36. Select desired blower motor
72. To change the blower off delay setting,
2 AND 3 3 AND 4
120 150
0.50 0.60 0.70 0.80
985 950 915 880
775 735 695 660
605 565 525 475
585 545 500 455
290 230 190 145
985 950 915 875
760 720 680 640
680 630 585 540
565 520 475 440
350 315 260 205
960 920
975 930 890 845
880 840 785 740
655 610 555 500
450 390 340 290
995 940 890 825
800 735 675 615
740 675 615 555
535 485 430 375
985 930 875 815
780 730 670 615
450 375 325 260
4 AND 5
180
0.90 1.00
850 815
620 580
430 375
405 350
- -
840 805
595 555
505 475
405 365
- -
870 825
795 755
690 640
450 395
230 195
985 925
770 700
555 505
505 460
330 265
970 920
765 705
550 490
- -