Inhaltsverzeichnis
Werbung
Verfügbare Sprachen
Verfügbare Sprachen
3 Device description
– In order to allow a reduction of pressure inside
the compressor and hence a safe restart, once it
EN
has been switched off (e.g. upon reaching the set
temperature or by de-energising), the device will
switch back on with a delay of 180 seconds.
– The device has one (in the case of the Basic con-
troller) or two (in the case of the Comfort controller)
integral floating contacts on the connection clamp
(system message relay with changeover contact,
terminal 3 – 5) which may be used to retrieve mes-
sages from the cooling unit, e.g. via PLC.
3.1.4 Condensation
At high levels of humidity and low temperatures in-
side the safe, condensation may form on the evapo-
rator coil.
For unit types SK 3126.xxx, the condensation is rout-
ed downwards out of the unit via a drain pipe on the
evaporator coil divider panel. For this purpose, a
hose must be connected to the condensate nozzle
(see Section "4.4 Connecting the condensate dis-
charge", page 28).
3.1.5 Filter mats
The cooling unit condenser is covered with a dirt-
repelling, easy-to-clean RiNano coating. In many
cases, therefore, the use of filter media is unneces-
sary, particularly in the case of dry dusts.
For coarse dust and lint in the ambient air, we recom-
mend installing an additional PU foam filter mat
(available as an accessory) in the cooling unit.
Depending on the incidence of dust, you will need to
replace the filter mat from time to time.
For air containing oil condensate, we recommend
the use of metal filters (also available as an accesso-
ry). These may be cleaned with suitable detergents
and reused.
Function of the filter mat monitor:
Dirt on the filter mat is automatically determined by
measuring the temperature difference in the external
circuit of the cooling unit. As the level of filter mat soil-
ing rises, the temperature difference will increase.
The nominal value of the temperature difference in
the external circuit adapts automatically to the rele-
vant operating points in the performance diagrams.
Hence, there is no need to readjust the nominal value
for different operating points of the cooling unit.
26
3.1.6 Door limit switch
The cooling unit may be operated with a floating door
limit switch connected. The door limit switch is not in-
cluded with the supply (available as an accessory,
Model No. PS 4127.000).
The door limit switch function causes the fans and
the compressor in the cooling unit to be switched off
after approximately 15 seconds when the safe door
is opened (contacts 1 and 2 closed). This prevents
the formation of condensation inside the safe while
the safe door is open. In order to prevent damage
to the unit, it is equipped with an ON delay: The
evaporator fan restarts with a delay of approximately
15 seconds after the door has been closed, while
the condenser fan and compressor switch on after
approximately 3 minutes.
3.1.7 Additional interface X3
Note:
The electrical signals at the interface are
of an extra-low voltage (not extra-low safety
voltages to EN 60 335).
An additional interface card may be connected to
the 9-pole SUB-D connector X3 in order to incorpo-
rate the cooling unit into higher-level monitoring sys-
tems (available as an accessory, interface card
Model No. SK 3124.200).
3.2 Proper usage
RITTAL compact split cooling units were developed
and designed in accordance with the state-of-the-art
and the recognised rules governing technical safety.
Nevertheless, if used improperly, they may pose a
threat to life and limb or cause damage to property.
The unit is only intended for cooling IT security safes.
Any other use is deemed improper. The manufactur-
er will not be liable for any damages caused as a re-
sult of improper use, or for incorrect assembly, instal-
lation or use. All risk is borne solely by the user.
Proper usage also includes the observation of all val-
id documents and compliance with the inspection
and servicing conditions.
RITTAL Compact split cooling unit assembly and operating instructions
Werbung
Kapitel
Inhaltsverzeichnis
