JOHNSON CONTROLS
109
FORM 150.62-NM6 (103)
FAN #1
FAN #3
FAN #5
FAN #2
FAN #4
FAN #6
2
CONDENSER FAN CONTROL
(YCAL0090 – YCAL0124 CHILLERS)
Condenser fan control on models YCAL0090
– YCAL0124 will always be by discharge pressure.
The on pressure and the differential off pressure are
programmable under the PROGRAM key.
CONDENSER FAN CONTROL - YCAL0090 – YCAL0124
TAbLE 30 –
YCAL0090 - YCAL0094 CONDENSER FAN CONTROL
CONTACTOR
MICRO BOARD
FAN #
FAN STAGE
ON
OFF
OUTPUT TB-4
SYS 1 SYS 2
SYS 1 SYS 2
SYS 1 SYS 2
1
DP > Fan Ctrl On Press DP < Fan Ctrl On Press – (Diff. Press.)
9M 13M
2 6
5 6
1 FAN FWD
2
DP > Fan Ctrl On Press +
DP < Fan Ctrl On Press –
8M & 12M &
2 FANS FWD
20 PSIG (1.38 Bars)
[(Diff. Press.) + 20 PSIG (1.38 Bars)]
9M
13M
2 & 4
6 & 8
3 & 5 4 & 6
3
DP > Fan Ctrl On Press +
DP < Fan Ctrl On Press –
7M, 8M, 11M, 12M
2, 4
6, 8
1, 3
2, 4
3 FANS FWD
40 PSIG (2.76 Bars)
[(Diff. Press.) + 40 PSIG (2.76 Bars)]
& 9M & 13M
& 5
& 9
& 5
& 6
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.
FIG. 10 –
YCAL0104 – YCAL0104 FAN LOCATION
LD07828
Summary of Contents for York YCAL0014E Series
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