Carrier OBL098 Installation Instructions Manual page 14

Table 8: Airflow Data, Models with 1/2 HP ECM motors
SW 1- H EAT
DIP switch position
A
(1=OFF, 2=OFF)
B (1=ON,2=OFF)
*C (I=OFE 2=ON)
D (1=ON,2=ON)
HEAT INPUT
/USGPH)
0,70
0,55
0_55
CFM with SW3-ADJ CFM with SW3-ADJ
DIP switch position A DIP switch position B
1260 1385
1050 1155
850 935
Same value as DIP switch position A
CFM with SW3-ADJ
DIP switch position C
1135
945
765
SW2- COOL
DIP switch position
A
(1=OFF, 2=OFF)
B (1=ON,2=OFF)
C (1 =OFF, 2=ON)
D (1=ON,2=ON)
A/C size
(TON)
3,0
2,5
2,0
1,5
CFM with SW3-ADJ
DIP switch position A
900
750
600
450
CFM with SW3-ADJ
DIP switch position B
990
830
660
495
CFM with SW3-ADJ
DIP switch position C
810
675
540
405
A/C size
(TON)
3,0
2,5
2,0
1,5
InCooling-Dehumidification mode,
SW2- COOL
DIP switch position
A
(1=OFF, 2=OFF)
B (1=ON,2=OFF)
C (1 =OFF, 2=ON)
D (1=ON,2=ON)
CFM with SW3-ADJ
DIP switch position A
1200
1000
800
600
CFM with SW3-ADJ
DIP switch position B
1320
1100
880
660
CFM with SW3-ADJ
DIP switch position C
1080
900
720
540
with no 24 VAC input to DH, the CFMs are reduced by 15%.
The CFMs shown are reduced by 20% if there is 24 VAC input to Y1 (Slow speed of 2-speed compressor)
SW4- DEALY
A
(1=OFF, 2=OFF)
B
(1=ON, 2=OFF)
*C (1 =OFF, 2=ON)
D (1 =ON, 2=ON)
HEAT INPUT
0,7
0,55
0,55
All
PreRun On-Delay
13% -45 sec.
13% -45 sec.
13% -60 sec.
13% -30 sec.
ShortRun On-Delay
19% - 30 sec
19% - 60 sec
13% - 60 sec
100% - 0 sec
Off-Delay
38% - 3 min.
38% - 3 min.
38% - 3 min.
100% - 2 min.
PreRun and ShortRun are the periods of time when the the blower starts at very low CFM to minimize the
distributon of cool air in the system and then runs up to normal speed.
Off Delay is the time required to cool down the heat exchanger with low CFMs, to minimize cool draft in the
air distribution system.
No adjustment A/C size PreRun On-Delay ShortRun On-Delay Off-Delay
required CFM Level - Time CFM Level - Time CFM Level - Time
All No Delay No Delay 100% - 90 sec.
PreRun and ShortRun are the periods of time when the the blower starts at very low CFM to minimize the
distributon of cool air in the system and then runs up to normal speed.
Off Delay is the time required to cool down the coil (heating mode) with low CFMs, to mimimize cool draft
in the air distribution system.
Alternate position for 0.55 input
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