Introduction
OPERATION MANUAL
Chapter 1
Unichiller®
V2.3.0en/07.06.19//17.12
16
Temperature control units with up to 150 g natural refrigerant
▪
The temperature control unit has been constructed to the requirements of EU and EFTA coun-
tries.
▪
Use the table as guidance for classifying the application field. Respect the max. refrigerant quanti-
ty stated therein.
Temperature control units WITH pre-installed gas warning sensor and > 150 g natural refrigerant
▪
The temperature control unit has been constructed to the requirements of EU and EFTA coun-
tries.
▪
Use the table as guidance for classifying the application field. Respect the max. refrigerant quanti-
ty or the permissible highest quantity above ground level (GL) stated therein.
▪
Ventilation with optional supply and exhaust air connection:
Use the temperature control unit’s
supply and exhaust air connection to connect it to the building’s exhaust system (see wiring dia-
gram from page 85 in Section
). First, remove the cover to the air inlet connection; an air
filter mat is installed behind it. This air filter mat must be checked / replaced at regular intervals
so that the air flowing into the temperature control unit is not reduced (see page 74, Section
»Function check and visual inspection«
). Connect the building’s exhaust system with the temper-
ature control unit’s exhaust air port. The cover of the supply air port
mustnot be removed
if the
exhaust system provided in a building is not used.
▪
The mounting plate for mounting a gas warning sensor is located inside the temperature control
unit in the vicinity of the
>Cable entry gas warning sensor<
[100].
▪
For the position of the
>Cable entry gas warning sensor<
[100], please refer to the wiring diagram
from page 85 in Section
.
▪
Additional information on the pre-installed gas detection sensor:
-
The built-in gas detection sensor enables a
safety shutdown at 20% of the lower explosive
limit via a power disconnect relay that is to be installed by the responsible body
. The
temperature control unit is thus switched off early and safely in case of fault.
-
A
24 V DC external power supply
must be available for the pre-installed gas warning sen-
sor. The alarm output of the gas warning sensor uses a 4 - 20 mA signal. Please refer to the
data sheet of the gas warning sensor for further technical information. A
separate pro-
cessing unit is available as an accessory
for the control of the power disconnect relay. The
processing unit provides a potential-free switching contact and simultaneously supplies
power to and analyzes the gas warning sensor. Both variants require the responsible body
to provide the necessary dimensioning and installation. Please refer to the data sheet of
the gas warning sensor for the technical installation information. The alarm of the gas de-
tection system can be connected to the responsible body’s alarm control unit. The respon-
sible body is responsible for this and other measures.
-
The responsible body is responsible for the
calibration of the gas detection sensor
prior to
initial operation and the observance of calibration and maintenance intervals specified in
the operating manual. We recommend to set calibration and maintenance intervals be-
tween 6 and 12 months if no information is provided. For increased safety requirements,
shorter intervals can be specified. On request, we will recommend a specialist company to
carry out calibration and maintenance.
Temperature control units WITHOUT pre-installed gas warning sensor and > 150 g natural refrig-
erant
Over 8 g refrigerant per m³ room air
DEATH OR SERIOUS INJURY DUE TO EXPLOSION
Observe the rating plate (amount of natural refrigerant contained) and the room size (maxi-
mum room concentration of natural refrigerant in case of leakage) when installing the temper-
ature control unit.
Over 8 g refrigerant per m³ room air: A gas warning sensor must be fitted and functioning.
The gas warning sensor must be calibrated and maintained at regular intervals (between 6 and
12 months).
The temperature control unit is not approved for operation
in an ATEX zone
.
▪
The temperature control unit has been constructed to the requirements of EU and EFTA coun-
tries.
▪
Use the table as guidance for classifying the application field. Respect the max. refrigerant quanti-
