York YCAL Series - STANDARD CONDENSER FAN CONTROL - YCAL0041 - YCAL0071

JOHNSON CONTROLS
136
FORM 150.66-NM3
ISSUE DATE: 09/25/2020
SECTION 8 - UNIT OPERATION
FIG. 12 – YCAL0041 – YCAL0071 FAN LOCATION (TYPICAL)
LD11419
STANDARD CONDENSER FAN CONTROL - YCAL0041 – YCAL0071
FAN #1
FAN #2
FAN #3
FAN #4
TABLE 22 – YCAL0041 – YCAL0071 CONDENSER FAN CONTROL USING OUTDOOR AMBIENT
TEMPERATURE AND DISCHARGE PRESSURE (DISCHARGE PRESSURE CONTROLS WILL
NOT FUNCTION AND FAN CONTROL WILL BE BASED ON AMBIENT TEMPERATURES ONLY,
UNLESS THE OPTIONAL DISCHARGE PRESSURE TRANSDUCER IS INSTALLED).
FAN
STAGE
ON OFF
CONTACTOR
I/O BOARD
OUTPUT
FAN #
SYS 1 SYS 2 SYS 1 SYS 2 SYS 1 SYS 2
1
OAT >25°F (-3.9°C)
OR
DP > Fan Ctrl On Press
OAT < 20°F (-6.7°C)
AND
DP < Fan Ctrl On Press – (Di󰀨.
Press.)
7M 10M TB7-9 TB10-9 3 4
2
OAT >65°F (18.3°C)
OR
DP > Fan Ctrl On Press
+ 75 psig (5.17 bar)
OAT < 60°F (15.6°C)
AND
DP < Fan Ctrl On Press.-
[Di󰀨. Press + 75 psig
(5.17 bar)]
7M &
8M
10M &
11M
TB7-9
&
TB7-10
TB10-9
&
TB10-
10
1 & 3 2 & 4
TABLE 23 – YCAL0041 – YCAL0071 CONDENSER FAN CONTROL USING DISCHARGE PRESSURE ONLY
FAN
STAGE
ON OFF
CONTACTOR
MICROBOARD
OUTPUT TB-4
FAN #
SYS 1 SYS 2 SYS 1 SYS 2 SYS 1 SYS 2
1
DP > Fan Ctrl On Press
DP < Fan Ctrl On Press –
(Di󰀨. Press.)
7M 10M TB7-9 TB10-9 3 4
2
DP > Fan Ctrl On Press
+ 75 psig (5.17 bar)
DP < Fan Ctrl On Press.) –
[(Di󰀨 Press.) + 75 psig
(5.17 bar)]
7M &
8M
10M &
11M
TB7-9
&
TB7-10
TB10-9
& TB10-
10
1 & 3 2 & 4