Electrical Connections - Bühler technologies EGK 1 Ex2 Notice De Montage

EGK 1 Ex2
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 ahead of the cooler (pressure op-
eration) 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.
4.2.1 Peristaltic Pump Connection (Optional)
Coolers ordered with attached peristaltic pumps already have
these installed and wired. Heat exchangers ordered at the
same time are already installed and connected to the peri-
staltic pumps.
NOTICE
Installing peristaltic pumps CPsingle / CPdouble limits the
maximum permissible operating pressure in the system!
Operating pressure ≤ 1 bar
A peristaltic pump may also be installed away from the cooler.
A mounting angle is available for mounting the pump directly
below the cooler. Mounts for securing the angle directly to the
cooler are designated.
4.2.2 Connecting the heat exchanger
CAUTION
Explosion hazard
Before using any accessories with the sample gas cooler,
verify these parts are suitable for the purpose and use in ex-
plosive atmospheres.
Please note, accessories may limit use of the sample gas
cooler with respect to explosion protection.
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.
BX450022 ◦ 12/2018
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.
The mains supply of the device must be fused according to the
specifications under technical data.
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!
Connection via plug
The device is equipped with connectors according to EN
175301-803 for mains and status output. If the cables are
mounted properly, they cannot be interchanged. Please make
sure that the connectors are remounted correctly after con-
necting the cable. The following figures show the pin assign-
ment with respect to the numbers printed on the connector.
The supply line cross-sections must be suitable for the rated
current. Use a maximum line cross-section of 1.5 mm²
(AWG 16) and a cable diameter of 8 - 10 mm (0.31 - 0.39 inch).
Bühler Technologies GmbH 11