Figure 43 - Ycal0019 - Ycal0033 Fan Location (Typical); Table 20 - Ycal0019 - Ycal0033 Condenser Fan Control Using Discharge Pressure; Table 21 - Ycal0019 - Ycal0033 Condenser Fan Control Using Discharge Pressure Only - York YCAL0019 Installation, Operation And Maintenance Manual

SECTION 8 – UNIT OPERATION
STANDARD CONDENSER FAN CONTROL – YCAL0019 – YCAL0033
TABLE 20 - YCAL0019 – YCAL0033 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 21 - YCAL0019 – YCAL0033 CONDENSER FAN CONTROL USING DISCHARGE PRESSURE ONLY
FAN
STAGE ON
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 43 - YCAL0019 – YCAL0033 FAN LOCATION (TYPICAL)
188
OFF*
DP < FAN CTRL ON
PRESS – DIFF.PRESS
**DP < FAN CTRL ON
PRESS –
DIFF. PRESS
OFF
DP < FAN CTRL
ON PRESS – (DIFF.
PRESS.)
**DP < FAN CTRL ON
PRESS – DIFF. PRESS.
FAN #2
FAN #1
MICROBOARD
CONTACTOR
OUTPUT
SYS 1 SYS 1
7M TB7-9
7M TB7-9
& &
8M TB7-10
MICROBOARD
CONTACTOR
OUTPUT
SYS 1 SYS 1
7M TB7-9
7M TB7-9
&
8M TB7-10
FORM 150.67-NM1
ISSUE DATE: 4/28/2017
FAN #
SYS 1
1
1
&
3
FAN #
SYS 1
1
1
& &
3
LD12211
JOHNSON CONTROLS