Carrier OBM112 Series, Installation Instructions Manual

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15
Table 7: Airflow Data, models with 1/2 HP, ECM motors
SW1- HEAT
DIP switch position
HEAT INPUT
(USGPH)
CFM with SW3-ADJ
DIP switch position A
CFM with SW3-ADJ
DIP switch position B
CFM with SW3-ADJ
DIP switch position C
A
(1=OFF, 2=OFF)
0,68 1160 1275 1045
B
(1=ON, 2=OFF)
0,80 1340 1475 1205
C
(1=OFF, 2=ON)*
0,68 1000 1100 900
D
(1=ON, 2=ON)*
0,80 1160 1275 1045
SW2- COOL
DIP switch position
A/C size
(TON)
CFM with SW3-ADJ
DIP switch position A
CFM with SW3-ADJ
DIP switch position B
CFM with SW3-ADJ
DIP switch position C
A
(1=OFF, 2=OFF)
3,5 1050 1210 895
B
(1=ON, 2=OFF)
3,0 900 1035 765
C
(1=OFF, 2=ON)
2,5 750 865 640
D
(1=ON, 2=ON)
2,0 600 690 510
SW2- COOL
DIP switch position
A/C size
(TON)
CFM with SW3-ADJ
DIP switch position A
CFM with SW3-ADJ
DIP switch position B
CFM with SW3-ADJ
DIP switch position C
A
(1=OFF, 2=OFF)
3,5 1400 1500 1260
B
(1=ON, 2=OFF)
3,0 1200 1320 1080
C
(1=OFF, 2=ON)
2,5 1000 1100 900
D
(1=ON, 2=ON)
2,0 800 880 720
SW4- DEALY
DIP switch position
HEAT INPUT
(USGPH)
PreRun On-Delay
CFM Level - Time
ShortRun On-Delay
CFM Level - Time
Off-Delay
CFM Level - Time
A
(1=OFF, 2=OFF)
0,68 13% - 45 sec. 19% - 60 sec 38% - 3 min.
B
(1=ON, 2=OFF)
0,80 13% - 45 sec. 19% - 30 sec 38% - 3 min.
C
(1=OFF, 2=ON)
All 13% - 45 sec. 100% - 0 sec 100% - 2 min.
D
(1=ON, 2=ON)
All 13% - 90 sec. 100% - 0 sec 100% - 2 min.
No adjustment
required
A/C size
PreRun On-Delay
CFM Level - Time
ShortRun On-Delay
CFM Level - Time
Off-Delay
CFM Level - Time
- All NO DELAY NO DELAY 100% - 90 sec
* Alternate adjustment in oil-fired heating mode with higher temperature rise
CONTINUOUS FAN
24 VAC input (R) on G only
COOLING OR HEAT PUMP HEATING MODE
24 VAC input (R) to G, Y/Y2 and O (for cooling)
In Cooling - Dehumidification mode, 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 (first stage cooling mode)
OIL HEATING MODE
24 VAC input (R) on W only
DELAY PROFILE FOR COOLING OR HEAT PUMP HEATING MODE
DELAY PROFILE FOR OIL HEATING MODE
air distribution system.
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