York YCH120 - Unit Controls and Operation (YCHA120, 150, 175 & 200); Control Panel Overview

YORK INTERNATIONAL
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INTRODUCTION
The YORK YCHA120-200 MicroComputer Control
Panel is a microprocessor based control system. The
microprocessor monitors return water temperature and
controls a 2-system (dual circuited) unit as needed to
maintain the desired leaving water temperature.
UNIT CONTROLS AND OPERATION
(YCHA120, 150, 175 & 200)
Concise, step-by-step instructions are printed on the
control panel to guide you through each control and
monitoring procedure. The control panel is also com-
patible with a building automation/energy management
system.
FIG. 13 – CONTROL CENTER (YCHA 120-200)
LD01786
A 4-digit display (See Fig.13) allows the operator to se-
lect and display system operating parameters via two
“Select Data Display” rotary switches. These param-
eters are:
• Return Chilled Water Temperature
• Leaving Chilled Water Temperature
• Low Leaving Water Cutout Temperature
• Return Chilled Water Setpoint
• System 1 % Full Load Motor Current
• System 1 Suction Pressure
• System 1 Oil Pressure, PSID
• System 1 Discharge Pressure