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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
- 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
. 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
.
The blower off delay has four adjustable settings from 90 sec to 180 sec.
See
. The blower off delay jumpers are located on the furnace
control See
and
. 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
-
-