York YCAL0012EC, Installation Operation & Maintenance

Page: 125 / 166

FORM 150.66-NM2
ISSUE DATE: 09/25/2020
125
JOHNSON CONTROLS
SECTION 7 - UNIT CONTROlS
7
This mode should be selected when an optional
2ACE module is installed to allow individual current
monitoring of each system. .
Option 12 – Power Fail Restart:
Chiller auto restarts after a power failure.
After a power failure, the UNIT switch must be toggled
before restart at the unit is allowed. NORMALLY
MANUAL RESTART should NOT BE SELECTED.
Option 13 – Unit Type:
The UNIT TYPE message cannot be modified under
the unit keys.
“LIQUID CHILLER” must be dis­
played, or damage to compressors or
other components will occur if operat­
ed in the HEAT PUMP or CONDENS­
ING UNIT modes.
If unit type needs to be changed to make the unit a
liquid chiller, remove power and then remove the
jumper between J11-7 and J11-12. Reapply power
to the micropanel and the microprocessor will store
the change.
Option 14 – Refrigerant Type:
Refrigerant type R-410A or R-407C may be selected
under Service Mode. Refrigerant type is displayed
under the Options Key, but is only programmable in
Service Mode.
Incorrect programming may cause
damage to compressors.
or
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:
This option allows overriding of the daily schedule
that is programmed. MANUAL OVERRIDE MODE
– DISABLED indicates that override mode has no
effect.
or
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
automatically be disabled after 30 minutes.
Option 11 – Current Feedback Options
Installed:
This mode should be selected when the panel is not
equipped with current sensing capability.
or
This mode should be selected when an optional 2ACE
Module is installed to allow combined current monitoring
of all systems by sensing current on the incoming line.
Current input is to J8-5 of the micro. On a single system
chiller “per system” and “per unit” performs the same
function. Either may be selected.
or
C U R R E N T F E E D B A C K
N O N E
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
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
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
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
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
U N I T T Y P E
L I Q U I D C H I L L E R
R E F R I G E R A N T T Y P E
R - 4 1 0 A
P O W E R F A I L R E S T A R T
A U T O M A T I C
P O W E R F A I L R E S T A R T
M A N U A L