Huber Pilot ONE Unistat T3*0, Operation Manual

Page: 19 / 100

Introduction
Chapter 1 OPERATION MANUAL
V2.4.0en/22.07.20//17.12
Unistat® T300 Series
19
tem components could be heated up above their rated temperatures, e.g. could cause danger to life
and limb by rupture of the material or phase transitions from liquid to gaseous state. Reaching the
trigger value is recognized in the Process Safety mode by the controller at the overtemperature
protection, which then releases cooling. This mode requires the compressor to be set to
Permanent-
ly ON
([System Settings] > [Power/ECO Settings] > [Compressor ON/OFF/AUTO] > [Permanently
ON]). Even if the temperature continues to rise, the cooling machine will use its maximum cooling
capacity to keep any further increase in temperature as low as possible. You must observe page 52
of section
»Setting the overtemperature protection«
.
1.4.3 Further protective devices
Emergency strategy – isolate the power supply!
To determine the type of switch or switch combination your temperature control unit is equipped
with, please refer to the connection sketch starting on page 99 in the section »Annex« .
Temperature control units with >Mains isolator<
[36]
(red/yellow or gray):
Turn the
>Mains
isolator<
[36] to the “0” position!
Temperature control units with >Mains isolator [36] (red/yellow) and additional >Appliance
switch< [37] (gray): Turn the >Mains isolator< [36] to the “0” position! Then turn the >Appliance
switch< [37] to the “0” position!
Temperature control units with >Mains isolator<
[36]
(gray) and >Emergency stop switch<
[70]
(red/yellow):
Press the
>Emergency stop switch<
[70]. Then turn the
>Mains isolator<
[36] to the
“0” position!
Temperature control units with >Mains switch< [37] : Power supply via socket: Disconnect the
temperature control unit from the power supply. Then turn the >Mains isolator< [37] to the “0”
position! Power supply via hard wiring: Disconnect the power supply by means of the building’s
circuit breaker. Then turn the >Mains isolator< [37] to the “0” position!
Temperature control units without a switch or inside a protective housing:
Connection via sock-
et: Disconnect the temperature control unit from the power supply. Connection via hard wiring:
Disconnect the power supply by means of the building’s circuit breaker.
1.4.3.1 Power interruption
Following a power outage (or when switching on the temperature control unit), this function can be
used to determine how the temperature control unit is supposed to respond. This response can be
determined via “Pilot ONE”.
OFF/Standby (Default setting)
After turning the temperature control unit on, thermoregulation is started only after manual input.
ON / Temperature control active
After turning on the temperature control unit, thermoregulation is always started. An INFO appears
for a few seconds. This makes it possible to suppress the automatic start.
Power Failure Auto
If temperature control is active during a power outage, the process will automatically continue after
the power outage.
1.4.3.2 Alarm functions
An alarm is a system state that signals unfavorable process conditions. The temperature control unit
can be programmed so that the plant operator is warned when defined limit values are exceeded.
The response of the temperature control unit to an alarm can be determined. Possible responses
are: Switch off temperature control or control temperature to a safe setpoint (2nd setpoint).
1.4.3.3 Warning messages
Warning messages contain a message about the irregularity of the temperature control unit. These
messages have no further consequences. The plant operator evaluates the relevance of the message
and takes action where necessary.