Johnson Controls YORK YCAL0043E Series, Installation Operation & Maintenance

Page: 89 / 188

JOHNSON CONTROLS
89
FORM 150.62-NM9 (709)
2
F A N C O N T R O L
A M B I E N T & D S C H P R E S S
Condenser fans are controlled by ambient temperature
and discharge pressure. This mode must be chosen if the
discharge pressure transducers are
not installed.
Option 10 – Manual Override Mode:
M A N U A L O V E R R I D E M O D E
D I S A B L E D
This option allows overriding of the daily schedule that
is programmed. MANUAL OVERRIDE MODE – DIS-
ABLED indicates that override mode has no effect.
or
M A N U A L O V E R R I D E M O D E
E N A B L E D
Manual Override Mode is enabled. This is a service
function and when enabled, will allow the unit to start
when shut down on the daily schedule. It will automati-
cally be disabled after 30 minutes.
Option 11 – Current Feedback Options Installed:
C U R R E N T F E E D B A C K
N O N E
This mode should be selected when the panel is not
equipped with current sensing capability.
or
C U R R E N T F E E D B A C K
O N E P E R U N I T
This mode should be selected when an optional 2ACE
Module is installed to allow combined current moni-
toring of all systems by sensing current on the incom-
ing line. Current input is to J7-12 & J7-4 of the I/O
Board.
or
C U R R E N T F E E D B A C K
O N E P E R S Y S T E M
This mode should be selected when an optional 2ACE
module is installed to allow individual current monitor-
ing of each system. SYS 1 input is to J7-12 & J7-4 of
the I/O Board. SYS 2 input is to J9-12 & J9-4 of the
I/O Board.
Option 12 – Soft Start Enable/Disable:
S O F T S T A R T
E N A B L E D
This should only be enabled on European units with
soft start on 2 compressors. This feature modifies the
compressor lead/lag to start the compressor(s) furthest
from the control panel last to minimize current inrush.
These compressors will be equipped with a soft starter.
Soft start is only viewable under OP
-
TIONS key and must be programmed
from the Service Mode.
On 2 compressor chillers, soft start will always be ap-
plied to the compressor farthest from the control panel.
This compressor will always start last to minimize cur-
rent inrush with the other compressor running.
On 4 compressor chillers, soft start will always be ap-
plied to the compressor furthest from the control panel
on each system. These compressors will always start last
to minimize current inrush with the other compressors
running.
x
x
1 1
x = Compressors
with soft start
Control Panel End
x
x
1
1
YCAL0197-0253 YCAL0117-0173
On 5 compressor chillers, soft start will always be ap-
plied to the compressor furthest from the control panel
on each system. Compressors 1 and 2 will continue to
lead/lag per the selected option. The soft start compres-
sors will always start last, to minimize current inrush
with the other compressors running.
x = Compressors
with soft start
Control Panel End
YCAL
x
1
x
2
1
On 6 compressor chillers, soft start will always be applied
to the compressors farthest from the control panel on each
system. Compressors 1 and 2 of each system will continue
to lead/lag per the selected option. The soft start compres-
sors will always start last to minimize current inrush with
the other compressors running.
x = Compressors
with soft start
Control Panel End
YCAL0287-0347
x
2
1
x
2
1
YCAL0197-0253
x
2
1
x
2
1