York YZ MODEL A, Operation And Maintenance Manual

Page: 61 / 170

JOHNSON CONTROLS
61
SECTION 3 - OPTIVIEW™ CONTROL CENTER FUNCTIONS AND NAVIGATION
FORM 161.01-OM1
ISSUE DATE: 6/8/2018
3
PROGRAMMABLE
BUTTON ACCESS LEVEL DESCRIPTION
Pulldown
Demand Limit
Operator
Allows the user to specify the current limit value (as a percentage of Full Load
Amps) to which the chiller will be limited during the specified pulldown limit time.
This value will override the Input Current Limit value during this time period. This
function is used to provide energy savings following chiller start-up. Pulldown de-
mand limit is ignored in BAS control source because the BAS system is expect-
ed to use its algorithms to reset current limit as required in that operating mode.
Pulldown
Demand Time
Operator
Allows the user to set a period of time for which the pulldown demand limit will
be in effect after the chiller starts.
Local Cooling
Setpoint
Operator
This value allows the user to define the Leaving Chilled Liquid Temperature that
is to be maintained by the chiller. It is programmable over the range of 36.0°F
to 72.0 °F (2.2 °C to 22.2 °C ) (water) or 10.0°F to 72.0°F (-12.2 °C to 22.2 °C)
(brine). Default = 45°F.
Leaving Chilled
Liquid
Temperature
Cycling Offset -
Shutdown
Operator
Programmable over the range of 1.0°F to 70.0°F (-17.2 °C to 21.1 °C). Default =
4°F (-15.6 °C).
Leaving Chilled
Liquid
Temperature
Cycling Offset -
Restart
Operator
Programmable over the range of 0.0°F to 37.0°F (-17.8 °C to 2.8 °C. Default =
0.0°F (-17.8°C).
Print Operator Generates Setpoints print report.
NAVIGATION
NAVIGATION
BUTTON DESCRIPTION
Home Causes an instant return to the Home Screen.
Setup Moves to the subscreen allowing setup of general system parameters.
Remote Control Navigates to the subscreen allowing setup of the Remote Control BAS interface.