Electrical Connections; Connecting The Heat Exchanger - Bühler technologies EGK 4 Guía Rápida

EGK 4
4.2 Installation
Run the gas supply to the cooler with a downward slope. The
gas inputs are marked in red and additionally labelled "IN".
If a large amount of condensate accumulates, we recommend
using a condensate trap with automatic condensate drain.
Our condensate drains, 11 LD spec., AK 20 V, or model 165 SS,
are suitable.
Glass vessels and automatic condensate drains are available
for draining condensate for external mounting below the
unit. When using automatic condensate drains, the sample
gas pump must be installed upstream of the cooler (pressure
operation) to ensure proper function of the condensate drain.
If the sample gas pump is located at the cooler outlet (suction
operation), we recommend using glass condensate traps or
peristaltic pumps.
Connecting the condensate drains
Depending on the material, build a connecting line with fit-
tings and tubing or hose between the heat exchanger and
condensate drain. For stainless steel the condensate drain can
be suspended directly to the connecting tube, for hoses the
condensate drain must be secured separately using a clamp.
The condensate drain can be mounted directly to the heat ex-
changer.
Condensate lines must always be installed with a slope and a
minimum inside diameter of DN 8/10 (5/16").
The DTV heat exchanger cannot be operated in conjunction
with an automatic condensate drain.
If the cooler was ordered with built-in automatic condensate
drains AK 5.1 and PVDF heat exchangers TV-WW or TV-SW, the
condensate drains are built into the cooler and the hoses con-
nected to the heat exchanger.
Peristaltic pump (optional)
Coolers ordered with attached frame and attached peristaltic
pumps already have these installed and wired. Heat ex-
changers ordered at the same time are already installed and
connected to the peristaltic pumps.
NOTICE
Installing peristaltic pumps limits the maximum approved
operating pressure in the system!
Operating pressure ≤ 0.5 bar

4.2.1 Connecting the heat exchanger

The gas inputs are marked in red.
On glass heat exchangers the correct position of the seal is im-
portant when connecting the gas lines (see image). The seal
consists of a silicone ring with a PTFE sleeve. The PTFE side
must face the glass thread.
6 Bühler Technologies GmbH
Glass
PTFE

4.3 Electrical connections

The operator must install an external separator for the device
which is clearly assigned to this device.
This separator
• must be located near the device,
• must be easy for the operator to reach,
• must comply with IEC 60947-1 and IEC 60947-3,
• must separate all live conductors and the status output,
and
• must not be attached to the power feed.
WARNING
Hazardous electrical voltage
The device must be installed by trained staff only.
CAUTION
Wrong mains voltage
Wrong mains voltage may damage the device.
Regard the correct mains voltage as given on the type plate.
WARNING
High voltage
Damage to the device in case of insulation testing
Do not proceed insulation tests with high voltage to the
device as a whole!
Insulation test
The device is equipped with extensive EMC protection. If insu-
lation tests are carried out the electronic filter devices will be
damaged. All necessary tests have been carried out for all con-
cerned groups of components at the factory (test voltage 1 kV
or 1.5 kV respectively, depending on the device).
If you wish to carry out the insulation test by yourself, please
test only separate groups of components.
Disconnect the compressor, the fan, the heating or the peri-
staltic pumps, respectively, and then carry out the insulation
tests.
BX450002 ◦ 09/2017