Table 8: Airflow Data, Models With 3/4 Hp Variable Speed - Dettson OLR112A16A Instructions D'installation

Table 8: Airflow data, models with 3/4 HP variable speed motors (ECM)
SW1- HEAT HEAT INPUT
DIP switch position
A
(1=OFF, 2=OFF)
B
(1=ON, 2=OFF)
C
(1=OFF, 2=ON)*
D
(1=ON, 2=ON)*
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)
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)
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)
SW4- DEALY HEAT INPUT
DIP switch position
A
(1=OFF, 2=OFF)
B
(1=ON, 2=OFF)
C
(1=OFF, 2=ON)
D
(1=ON, 2=ON)
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
required
-
* Alternate adjustment in oil-fired heating mode for higher temperature rise
24 VAC input (R) on W only
CFM with SW3-ADJ
(USGPH) DIP switch position A
0,68 1160
0,80 1340
0,68 1000
0,80 1160
24 VAC input (R) on G only
A/C size CFM with SW3-ADJ
(TON) DIP switch position A
4,0 1200
3,5 1050
3,0
2,5
COOLING OR HEAT PUMP HEATING MODE
24 VAC input (R) to G, Y/Y2 and O (for cooling)
A/C size CFM with SW3-ADJ
(TON) DIP switch position A
4,0 1600
3,5 1400
3,0 1200
2,5 1000
DELAY PROFILE FOR OIL HEATING MODE
PreRun On-Delay
(USGPH) CFM Level - Time
0,68 13% - 45 sec.
0,80 13% - 45 sec.
All 13% - 45 sec.
All 13% - 90 sec.
DELAY PROFILE FOR COOLING OR HEAT PUMP HEATING MODE
PreRun On-Delay
A/C size
CFM Level - Time
All NO DELAY
OIL HEATING MODE
CFM with SW3-ADJ
DIP switch position B
CONTINUOUS FAN
CFM with SW3-ADJ
DIP switch position B
900
750
CFM with SW3-ADJ
DIP switch position B
ShortRun On-Delay
CFM Level - Time
19% - 60 sec
19% - 30 sec
100% - 0 sec
100% - 0 sec
ShortRun On-Delay
CFM Level - Time
14
DIP switch position C
1275
1475
1100
1275
DIP switch position C
1380
1210
1035
865
DIP switch position C
1750
1540
1320
1100
NO DELAY
CFM with SW3-ADJ
1045
1205
900
1045
CFM with SW3-ADJ
1020
875
765
640
CFM with SW3-ADJ
1440
1260
1080
900
Off-Delay
CFM Level - Time
38% - 3 min.
38% - 3 min.
100% - 2 min.
100% - 2 min.
Off-Delay
CFM Level - Time
100% - 90 sec