Standard Condenser Fan Control - Ycal0041 - Ycal0071; Fig. 12 - Ycal0041 - Ycal0071 Fan Location (Typical); Table 22 - Ycal0041 - Ycal0071 Condenser Fan Control Using Outdoor; Ambient Temperature And Discharge Pressure - York YCAL Series Installation Operation & Maintenance

SECTION 8 - UNIT OPERATION
STANDARD CONDENSER FAN CONTROL - YCAL0041 – YCAL0071
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
ON
STAGE
OAT >25°F (-3.9°C)
1
OR
DP > Fan Ctrl On Press
OAT >65°F (18.3°C)
OR
2
DP > Fan Ctrl On Press
+ 75 psig (5.17 bar)
TABLE 23 – YCAL0041 – YCAL0071 CONDENSER FAN CONTROL USING DISCHARGE PRESSURE ONLY
FAN
ON
STAGE
1
DP > Fan Ctrl On Press
DP > Fan Ctrl On Press
2
+ 75 psig (5.17 bar)
FIG. 12 – YCAL0041 – YCAL0071 FAN LOCATION (TYPICAL)
136
OFF
OAT < 20°F (-6.7°C)
AND
DP < Fan Ctrl On Press – (Diff.
Press.)
OAT < 60°F (15.6°C)
AND
DP < Fan Ctrl On Press.-
[Diff. Press + 75 psig
(5.17 bar)]
OFF
DP < Fan Ctrl On Press –
(Diff. Press.)
DP < Fan Ctrl On Press.) –
[(Diff Press.) + 75 psig
(5.17 bar)]
FAN #2
FAN #1
I/O BOARD
CONTACTOR
OUTPUT
SYS 1 SYS 2 SYS 1
7M 10M TB7-9
TB7-9
7M & 10M &
&
8M 11M
TB7-10
MICROBOARD
CONTACTOR
OUTPUT TB-4
SYS 1 SYS 2 SYS 1
7M 10M TB7-9
TB7-9
7M & 10M &
&
8M 11M
TB7-10
FAN #3
FAN #4
FORM 150.66-NM3
ISSUE DATE: 09/25/2020
FAN #
SYS 2 SYS 1 SYS 2
TB10-9 3 4
TB10-9
&
1 & 3 2 & 4
TB10-
10
FAN #
SYS 2 SYS 1 SYS 2
TB10-9 3 4
TB10-9
& TB10- 1 & 3 2 & 4
10
LD11419
JOHNSON CONTROLS