York OPTIVIEW Operation Manual page 59

FORM 160.78-O2
ISSUE DATE: 5/22/2017
Load Limit
Displays if any load limiting control is acting on the
temperature control output to the capacity control de-
vices. The field indicates the following:
• Inactive - Capacity Control is not active
• None – No limit is in effect
• Input Current
• Motor Current
• Condenser Pressure
• Evaporator Pressure
Head Pressure
Displays the difference between condenser refrigerant
pressure and evaporator refrigerant pressure.
Entering Condenser Liquid Temperature
Displays the temperature of the condenser liquid enter-
ing the condenser.
Capacity Control Output Devices
Displays the following for each of the devices that
is available: VSD (Variable Speed Drive), PRV (Pre-
rotation Vanes) - Gas Path A, VGD (Variable Geom-
etry Diffuser) - Gas Path B or HGBP (Hot Gas Bypass
Valve)
• Active Output (LED): Indicates which device is
currently selected by the control for manipulation.
• Command: Displays the output command from
the control to the device in Hertz to the VSD or
in percent of full open to the PRV, VGD or HGBP
valve.
• Feedback: Displays the present speed feedback
from the VSD or present position feedback from
the PRV or VGD position potentiometer.
• Control Mode: Displays whether the device is
under Automatic or Manual control.
• Active Min: Displays the prevailing minimum
value to which the control to the device is limited,
based upon surge controls or operating limits.
JOHNSON CONTROLS
SECTION 2 - OPTIVIEW CONTROL CENTER INTRODUCTION
PROGAMMABLE
Select VSD Control
Access Level Required: SERVICE
Pressing this button causes VSD Control to be selected
for manual control, the LED to be lit and the heading
over the manual control buttons to display "Manual
Control – VSD".
Select PRV Control - Gas Path A
Access Level Required: SERVICE
Pressing this button causes PRV Control to be selected
for manual control, the LED to be lit and the heading
over the manual control buttons to display "Manual
Control – PRV".
Select VGD Control - Gas Path B
Access Level Required: SERVICE
Pressing this button causes VGD Control to be selected
for manual control, the LED to be lit and the heading
over the manual control buttons to display "Manual
Control – VGD".
Select HGBP Control
Access Level Required: SERVICE
Pressing this button causes HGBP Control to be select-
ed for manual control, the LED to be lit and the head-
ing over the manual control buttons to display "Manual
Control – HGBP".
Manual Increment
Access Level Required: SERVICE
This key enables the change increment to be set for
manual control of the selected device. It also contains
a text box displaying the manual increment for manual
control. The value shall display in tenths when VSD
Control is selected, integers when PRV or VGD Con-
trol is selected and integers when HGBP Control is se-
lected.
Increase
Access Level Required: SERVICE
Pressing this button will set the selected device's state
to Manual if it had been in Auto and will increase the
device's present control command by an amount equal
to the Manual Increment.
2
59