Technical information

UGH021/0301 VL Series Portable Chillers, 2 to 40 Tons
Page: 23
f. The amp meter will display the motor amps.
Compare the actual motor amps as displayed on
the amp meter to the full load amp rating as listed
on the motor name plate.
g. If the amp draw is excessive (higher than the listed
name plate amp rating), a throttling valve must be
installed in the “from process” circuit line. The
preferred throttling valve is a ball valve.
h. With the throttling valve installed, fully close the
valve and then engage the pump. Slowly open the
throttling valve and monitor the motor amps as
displayed on the amp meter until the actual motor
amps equals the listed full load amp rating of the
motor.
3.3 INSTRUMENT OPERATION
A. INSTRUMENT START-UP
1. When the correct electrical power and adequate water
supply pressure are supplied to the unit, it is possible to
start the unit for temperature control duty.
2. When the electrical power supply is engaged to the unit,
the instrument (figure 3.3A) will momentarily illuminate all
indicating lights and digits on the display head. After a
short delay, the instrument will display the software version
number. At this time, the operator can verify that all lights
and digits are functioning properly. If the operator
VL Chiller Control
Temperature
To Process
Setpoint
Power
Pump
Compressor
Hot Gas Bypass
On
Off