Figure 44 - Ycal0043 - Ycal0066 Fan Location (Typical); Table 22 - Ycal0043 - Ycal0066 Condenser Fan Control Using Discharge Pressure; Table 23 - Ycal0043 - Ycal0066 Condenser Fan Control Using Discharge Pressure Only - York YCAL0019 Installation, Operation And Maintenance Manual

FORM 150.67-NM1
ISSUE DATE: 4/28/2017
STANDARD CONDENSER FAN CONTROL – YCAL0043 – YCAL0066
TABLE 22 - YCAL0043 – YCAL0066 CONDENSER FAN CONTROL USING DISCHARGE PRESSURE
FAN
ON*
STAGE
DP> FAN CRTL ON
1
PRESS
DP > FAN CTRL
ON PRESS AND
2 FAN STAGE 1 IS
ENERGIZED
TABLE 23 - YCAL0043 – YCAL0066 CONDENSER FAN CONTROL USING DISCHARGE PRESSURE ONLY
FAN
ON
STAGE
DP > FAN CTRL
1
ON PRESS
DP > FAN CTRL
ON PRESS AND
2
FAN STAGE 1 IS
ENERGIZED
* When a fan stage is turned ON, the on pressure for the next stage is increased 20 PSIG and ramped back to the programmed
on pressure over the next 20 seconds.
** When a fan stage is turned OFF (programmed on pressure minus differential), the off pressure for the next stage is decreased
20 PSIG and ramped back to the programmed off pressure minus the differential.
FIGURE 44 - YCAL0043 – YCAL0066 FAN LOCATION (TYPICAL)
JOHNSON CONTROLS
OFF*
SYS 1
DP < FAN CTRL ON
PRESS – DIFF.PRESS
DP < FAN CTRL ON
PRESS – DIFF. PRESS
OFF
SYS 1
DP < FAN CTRL ON
PRESS – DIFF. PRESS.
DP < FAN CTRL ON
PRESS – DIFF. PRESS.
FAN #2
FAN #1
MICRO BOARD
CONTACTOR
OUTPUT
SYS 2 SYS 1
7M 10M TB7-9
TB7-9
7M 10M
&
& &
TB7-10
8M 11M
MICRO BOARD
CONTACTOR
OUTPUT
SYS 2 SYS 1
7M 10M TB7-9
7M 10M TB7-9
& & &
8M 11M TB7-10
FAN #3
SECTION 8 – UNIT OPERATION
FAN #
SYS 2 SYS 1 SYS 2
TB10-9 1 2
TB10-9
1 2
&
& &
TB10-10
3 4
FAN #
SYS 2 SYS 1 SYS 2
TB10-9 1 2
TB10-9 1 2
& & &
TB10-10 3 4
FAN #4
LD11419
189
8