Operation And Control - Bühler technologies EGK 4 Guía Rápida

EGK 4
Connection via terminal block
The electrical terminals of the device are found behind the
front cover (rear cover with 19" unit). Two screw connections
PG 13.5 are planned for the cables. Please remark that the
short time starting current of the compressor is a lot higher
than the working current and can be up to 10 A.
If the cooler was ordered with additional frame and built-in
peristaltic pumps, they are wired to an additional terminal
block beside the main block. As standard, the pumps are dir-
ectly wired to the main supply.
Connections diagrams:
optional
Pt100 inside
heat exchanger
(optional)
max. 230V/50Hz
3 K >
3 A
contacts on
silent
3 K <
(alarm status)
Excess temperature
fuse
Mains
Attention! Always disconnect the unit from the mains before servicing
Fig. 1: Connection diagram without pump
optional
Pt100 inside
heat exchanger
(optional)
max. 230V/50Hz
3 A
contacts on
silent
(alarm status)
Excess temperature
fuse
Attention! Always disconnect the unit from the mains before servicing
Fig. 2: Connection diagram with pump

5 Operation and control

NOTICE
The device must not be operated beyond its specifications.
After turning on the power supply the yellow overdrive-LED
will turn on indication the temperature is out of range. The
cooler will now cool down the heat exchangers. As soon as
temperature reaches the wanted range, which is the aimed
temperature ±3K (±5°F), the overdrive LED turns off, the green
LED will turn on and the alarm-contact will switch.
If one of the yellow LEDs will turn on during operation see
chapter "Troubleshooting".
For performance limits see datasheet.
6 Maintenance
Always observe the applicable safety- and operating regula-
tions when performing any type of maintenance. Please refer
to the original operator's manual on the included CD or online
at www.buehler-technologies.com for maintenance informa-
tion.
BX450002 ◦ 09/2017
Electric supply min. 3 x 1.5 mm^2
10 A fuse
Pump 1
Pump 2
Pump 3
Pump 4
PE subframe
with separate pump
control the bridges
2, 3, 4, 5, 6 must be removed from
the terminal strips.
Electric supply min. 3 x 1.5 mm^2
10 A fuse
7 Service and Repair
Please refer to the original operator's manual on the included
CD or online at www.buehler-technologies.com for a detailed
description of the unit including information on
troubleshooting and repair.
Mains
Bühler Technologies GmbH 7