Johnson Controls YORK YVAM 0350, Operation & Maintenance Manual

Page: 58 / 162

Motor details screen
Figure 26: Motor details screen
This screen displays information pertinent to the motor temperature monitoring feature. The
feature consists of motor winding temperature and motor housing temperature. The individual
winding temperature sensors can be disabled on this screen.
Table 42: Display only fields
Field/LED name Description
Motor Run (LED) Illuminates when the OptiView™ control center is commanding the motor to run.
% Input Full Load Amps Displays the input current as a percentage of chiller full load amps.
VSD Output Frequency Displays the frequency at which the variable speed drive is operating the motor. This value is
returned from the drive logic board.
VGD Position Displays the present variable geometry diffuser position as a value between 0% (closed) and
100% (full open).
Motor Temperatures Displays the enabled motor winding temperatures for phase A, B and C. Individual
temperatures can be disabled using the Temperature Disable setpoint. The software
prevents more than 2 of the 3 sensors at either end of the motor to be disabled. When an
individual temperature is disabled, the temperature data box does not appear. Any input
that registers as open displays the minimum temperature 32°F.
Average Winding
Temperature
This value is calculated as the average of all enabled and valid motor winding temperatures.
Any winding temperature that registers as open, out of range or disabled is not used in the
calculation. A maximum of six temperatures is used to calculate the average.
Rotor Elongation Displays the calculated change in distance from the two axial position sensors for the rotor
shaft versus the shutdown baseline set at the factory. This indicates thermal growth and
torque effect.
Estimated Rotor Temperature Displays the temperature derived from physical parameters, elongation, and housing
temperature.
Motor Housing Temperature Display the temperature of the motor housing sensed at the thermistor on the motor
externally.
Motor Housing Temperature
Setpoint
Displays the target temperature for the motor cooling control. It is equal to entering
condenser water temperature plus the programmable setpoint offset.
YVAM Control Center 58