York YK Style H Operation Manual page 124

SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
ed to enter a time value, the user must enter the hour
and minute desired (using leading zeroes as necessary).
If the chiller is presently set to 24-hour mode, the time
must be entered in the 24-hour format. Otherwise, the
user must also select AM or PM for the entered time. If
out of range, the user is prompted for the information
again. At this point the user may retry the time entry, or
cancel the programming attempt.
12/24 Hr
Access Level Required: OPERATOR
Allows the user to specify the format in which the time
will be presented to the user. This setpoint will affect
the display of the time on the chiller panel and on all
reports generated. 12-hour time format will include the
AM and PM modifiers and show the range of time be-
tween 1:00 and 12:59, while the 24-hour time format
will show the range of time between 0:00 and 23:59.
Change Settings
Access Level Required: OPERATOR or higher
Used to enter the following setpoints. Pressing this key
places a green selection box around the first changeable
setpoint. The access level determines which setpoints
can be changed. Use the ▲ and ▼ keys to place the
selection box around the desired setpoint. With the
setpoint selected, press the ENTER () key. A dialog
box appears with the range of settings.
VGD Feedback
Access Level Required: SERVICE
Allows a Service Technician to enable or disable the if
a VGD position potentiometer is installed or not.
Chilled Liquid Pump Operation
Access Level Required: SERVICE
Allows a Service Technician to select Chilled Liquid
Pump control contacts (I/O Board TB2-44/45) opera-
tion as either standard or enhanced.
Anti-Recycle
Access Level Required: SERVICE
Allows a Service Technician to enable or disable the
anti-recycle timer.
Motor Drive Type
Access Level Required: SERVICE
Allows a Service Technician to enter the applied com-
pressor motor starter type as either Electro- Mechani-
cal (EM), Solid State starter (SSS – Mod B), Variable
Speed Drive-60Hz, Variable Speed Drive-50Hz, Me-
dium Voltage Solid State Starter or Medium Voltage
Variable Speed Drive.
124
Heat Recovery
Access Level Required: SERVICE
Allows a Service Technician to enable or disable the
Heat Recovery feature.
Heat Recovery cannot be used simultaneously with
Heat Pump Duty. When Heat Pump Duty is enabled,
Heat Recovery is automatically disabled and locked.
Head Pressure Control
Access Level Required: SERVICE
Allows a Service Technician to enable or disable the
Head Pressure Control feature. Head Pressure Control
cannot be used simultaneously with Heat Pump Duty.
When Heat Pump Duty is enabled, Head Pressure Con-
trol is automatically disabled and locked.
Coastdown
Access Level Required: SERVICE
Allows a Service Technician to select either Standard
(electric motor) or Enhanced (15 minutes–Steam Tur-
bine applications). When Standard is selected, the
duration is programmable using the Coastdown Time
Setpoint below.
Power Failure Restart
Access Level Required: OPERATOR
Allows the user to select Manual or Automatic restart
after power failure.
Pre-Run
Access Level Required: SERVICE
Allows Service Technician to select either Standard
(30 seconds) or Extended (180 seconds).
Motor Monitoring
Access Level Required: SERVICE
Allows the Service Technician to enable or disable the
Motor Monitoring feature.
Isolation Valves
Access Level Required: SERVICE
Allows the Service Technician to enable or disable the
Isolation Valve Control feature.
Evaporator Transducer
Access Level Required: SERVICE
Allows the Service Technician to select the appropri-
ate evaporator transducer for a standard (6 -74) or heat
recovery (1 - 125) chiller.
FORM 160.76-O2
issue date: 6/15/2015
JOHNsON CONtROLs