OPERATING AND MAINTENANCE MANUAL
Chapter 8 - Other components
TAEevo Tech 015÷802 60 Hz UL
183
The data in this manual are not binding and they can be modified by the manufacturer without notice.
Reproduction of this manual is strictly prohibited
EN
ENGLISH
8 . 4
P r e s s u r e t r a n s d u c e r s
The models TAEevo Tech 402÷802 are equipped with a high pressure transducer on the refrigerant circuit.
Pressure transducers read the compressors discharge pressure values and control operation of the unit on the basis of the
pressure setpoint values set on the electronic controller.
By means of the values read by these transducers the following functions of each circuit can be provided separately:
•
high pressure alarm;
•
unloading for high pressure ;
•
measurement of high pressure values.
Therefore, if pressure in one circuit increases with respect to the preset limit value, an alarm signal can be tripped to stop the
unit or stop one or more compressors after a programmable time interval.
8 . 5
L e v e l s e n s o r
All units are equipped with a level sensor. The level sensor is mounted in the tank where it is responsible for signalling low
water level conditions. If this problem is detected the sensor sends an alarm signal to the control unit resulting in an
immediate shutdown of the chiller.
ATTENTION
Adopt all the possible precautions in order to prevent accidental contact with electrically live parts.
The voltage present in the electrical cabinet can reach values that are potentially fatal for humans.
ATTENTION
The level sensor has been calibrated to function with 250kOhm sensitivity (position
A
=5,
B
=H on the “Empty” side).
Calibration of the level sensor is performed by the manufacturer so it must not be altered.
ATTENTION
There is an anti-tamper sticker over the adjustment potentiometers (A and B).
Damaging this sticker, even partially, will automatically invalidate the warranty.
The Amber LED switches
on in the presence of
water (in normal
operating mode) and
switches off in the
absence of water.
Power on the system; the
green LED will switch
steady on.
A
Sensitivity adjustment
B
Sensitivity adjustment
range
B
A
Adjusting potentiometer
B
changes the
sensitivity range of potentiometer
A
L
250
÷ 5 K
S
5 K
÷ 100 K
H
50 K
÷ 500 K
Conductive Level Controller Dual Function
Sensitivity
1
2
3
10
4 5 6
8
7
9
Fill
Empty
L
S
H
L
S
H
11 12 14
A1
Y2
A2 24 21
22
Y1
Y3