JOHNSON CONTROLS
121
FORM 150.62-NM8 (1020)
3
Condenser Fan Control on models YCAL0090 through
YCAL0104 will always be by discharge pressure. The
ON pressure and the differential OFF pressure are
programmable under the PROGRAM key.
CONDENSER FAN CONTROL (CONT'D)
YCAL0090 – YCAL0104
The following
figures and tables
outline fan sequencing
for the various models. These models are equipped to
operate to 0°F ambient as a standard.
FAN #3
FAN #5
FAN #7
FAN #4
FAN #6
FAN #8
FIG. 10 – YCAL0090 THROUGH YCAL0104 FAN LOCATION
LD07828A
TABLE 30 – YCAL0090 - YCAL0104 CONDENSER FAN CONTROL
FAN
STAGE
ON
OFF
CONTACTOR
I/O BOARD
OUTPUT
FAN #
SYS 1 SYS 2
SYS 1
SYS 2
SYS 1 SYS 2
1
1 FAN
FWD
DP > Fan Ctrl On
Press
DP < Fan Ctrl On Press
– (Diff. Press.)
10M
14M
TB7-8
TB10-8
7
8
2
2 FANS
FWD
DP > Fan Ctrl On
Press + 20 psig (1.38
bars)
DP < Fan Ctrl On Press.) –
[(Diff Press.) + 20
psig (1.38
bars)]
9M &
10M
13M &
14M
TB7-8 &
TB7-9
TB10-8 &
TB10-9
5 & 7 6 & 8
3
3 FANS
FWD
DP > Fan Ctrl On
Press + 40 psig (2.76
bars)
DP < Fan Ctrl On Press.) –
[(Diff Press.) + 40
psig (2.76
bars)]
8M, 9M
& 10M
12M,
13M &
14M
TB7-8,
TB7-9
&
TB7-10
TB10-8,
TB10-9 &
TB10-10
3, 5
& 7
4, 6
& 8
Содержание YCAL0014E Series
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