Electrical Connections - Bühler technologies TC-Double Notice De Montage

TC-Double (+)
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.
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.
Potential equalization/static charge
Static charges can result in incendive sparking. Avoid static
charges. Any conductive parts of the cooler must be groun-
ded!
The housing has a connection for an earth/equipotential
bonding conductor. Ensure the housing is adequately earthed
(minimum conductor cross-section 4 mm
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.
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.
12 Bühler Technologies GmbH
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).
* When using an alarm contact connect to ≥ 33 V AC or
≥ 70 V DC PE voltage.
The clamping areas for S1 and S2 are 8 - 10 mm (0.31 – 0.39
inch) in diameter.
4.4 Signal outputs
The device has various status signals. The maximum switch-
ing power of the alarm outputs is 250 V AC/150 V DC, 2 A, 50
VA, each.
An alarm is triggered by the alarm contact / status output (S2)
if the temperature in block 1 is outside the specified limits. It
does not indicate if the alarm was triggered due to excess
temperature or insufficient temperature.
Description of signal outputs
Re-
gard-
ing S2)
2
).
Re-
gard-
ing S3)
The front film on the display module has three LEDs:
Plug numbering
Electric supply S1
Analogue output S3
*
Alarm contact S2
*
Function / Description
contact type
internal the following
changeover device
contact: statuses can
max. be indicated
250 V AC / via two
150 V DC, 2 A, switching out-
50 VA puts:
4-20 mA Signalling of
analogue actual tem-
output perature in
(R <500 Ω) block 1 (please
Load
use shielded
cables)
1 - N/C
2 - N/C
3 - GND
4 - 4-20 mA out
5 - shield
Contact between 3 and 2
closed (alarm)
• No mains voltage
and/or actual tem-
perature outside the
alarm thresholds
Contact between 3 and 1
closed (ok)
• Mains voltage at-
tached + actual tem-
perature within the
alarm thresholds
With temperature signal
option
T = -20 °C ≙ (-4 °F) ->
Cooler
4 mA/ 2V
T = 5 °C ≙ (41 °F) ->
Cooler
9 mA/ 4,5 V
T = 60 °C ≙ (140 °F) ->
Cooler
20 mA/ 10 V
BX440027 ◦ 10/2018