Filter
Top Products
Continuous Fan
When the thermostat is set for "Continuous Fan" operation
and there is no demand for heating or cooling, the blower
control will provide 50% of the COOL CFM selected.
G
l 50% &_ /
G - Fan switch ON
CALL g - Fan switch OFF OFF
NOTE - With the proper thermostat and subbase, continu-
ous blower operation is possible by closing the R to G cir-
cuit.
Dehumidification
The A54 blower control board (see figure 17) includes a
HUM terminal which provides for connection of a humidis-
tat. The JW1 jumper on the blower control board must be
cut to activate the HUM terminal. The humidistat must be
wired to open on humidity rise. When the dehumidification
circuit is used, the variable speed motor will reduce the se-
lected air flow rate by 18% when humidity levels are high.
An LED (D1) lights when the blower is operating in the de-
humidification mode.
Humidification
Terminals are provided on the A15 control board for 120
volt output to operate a humidifier. The "HUM" terminal is
energized when there is a call for heat. See figure 18.
Electronic Air Cleaner
Terminals are provided on A15 control board for 120 volt
output to an electronic air cleaner. The "EAC" terminal is
energized when there is a call for heat, cool, or continuous
blower. See figure 18.
Table 6
Blower Performance {0 through 0.80 in. w.g. (0 through 200 Pa) Extemal Static Pressure Range}
"ADJUST"
Jumper
Setting
ADJUST
(+)
NORM
(-)
(+)
NORM
(-)
(+)
NORM
(-)
"HEAT" Jumper Speed Position [kBtuh heat input]
iiiiii'",_!_;!ji!i!!i_!i_!i!_!i_ii_ii_ii_iii_iiiiiiiiii
HEAT
B B
cfm L/s
HEAT HEAT
;_/A_!A
[-154]
Same as
NORM
1730 816
Same as
..............................................................NORM
!A: Same as
..........................................................NORM
"COOL" Jumper Speed Position
COOL COOL COOL
B C
cfm L/s cfm L/s
545
47O
4OO
iA ^
D h
cfm L/s cfm L/s
65O
565
48O
920 435
800 380
680 320
1150 540
1000 470
850 400
1840 870
1600 755
1360 640
cfm L/s
Model O23V2/3-70/90 Units
[-90] [-70]
Same as NORM 1380 650 1150
1000 470 750 355 1200 565 1000
Same as NORM 1020 480 850
Model O23V3/4-105/120 Units
[-120] [-105]
SameasNORM 1610 760 1380
1300 615 1200 565 1400 660 1200
SameasNORM 1190 560 1020
Model O23V5-140/154 Units
[-140]
Sameas
2300 1085 2070
NORM
1400 660 2000 945 1800
1700 800 1530
NOTE - Continuous Fan air volume is 50% of COOL speed.
975
85O
72O
cfm
69O
6OO
510
92O
8OO
68O
1380
1200
1020
L/s
325
285
24O
435
380
320
65O
565
48O
Page 15
O23V SERIES