Rittal enclosure cooling unit
13
5 Start-up
EN
of the temperature difference in the external circuit
adapts automatically to the relevant operating points in
the performance diagrams. Hence there is no need to
readjust the setpoint value for different unit operating
points.
5
Start-up
Once all the assembly and installation work is com-
plete, switch on the power supply to the cooling unit.
The cooling unit starts running:
– The software version of the controller first appears for
approx. 2 seconds, then "ECO" to show Eco mode is
enabled. The internal enclosure temperature will then
appear in the 7-segment display.
You can now make your individual settings on the unit
e.g. set the temperature or assign the network identifier
etc. (refer to section 6 "Operation").
6
Operation
You can operate the cooling unit using the controller on
the front of the device (fig. 1, item 5).
6.1
Control using the e-Comfort controller
For unit types xxxx.500/.510/.540 and xxxx.600/.610/
.640.
Fig. 17:
e-Comfort controller
Key
1
Programming button, also display of the set temperature
unit (degrees Celsius)
2
Set button
3
Programming button, also display of the set temperature
unit (degrees Fahrenheit)
4
7-segment display
6.1.1
Properties
– Rated operating voltage:
– 115 V or
– 230 V or
– 400 V, 2-phase or
– 400/460 V, 3-phase
– Integral start-up delay and door limit switch function.
– Protective function to prevent icing.
– Monitoring of all motors (compressor, condenser fan,
evaporator fan).
– Phase monitoring for three-phase units.
– Master-slave function with a maximum of ten units.
One device functions as a master unit. Once the set
temperature is reached by one of the connected slave
devices or in the event of the door limit switch function,
the affected slave unit will report to the master unit that
switches all the other cooling units on or off as re-
quired.
– Switching hysteresis: adjustable within the range 2 –
10 K, preset to 5 K.
– Visualisation of the current internal enclosure temper-
ature and all error messages in the 7-segment display.
– Using an interface card (Model No. 3124.200), the unit
may be incorporated into higher-level remote monitor-
ing systems.
The cooling unit operates automatically, i.e. after switch-
ing on the power supply, the evaporator fan (see fig. 2)
will run and circulate the internal enclosure air.
The compressor and condenser fan are regulated by the
e-Comfort controller.
The e-Comfort controller has a 7-segment display
(fig. 17, item 4). After switching on the power supply, the
current software version initially appears on this display
for approx. 2 seconds together with the symbol to show
Eco mode is enabled, followed by a preset option (e.g.
t10) or the temperature.
In regular operation, the display shows both the temper-
ature (in degrees Celsius or Fahrenheit – users may
switch between the two) and any error messages.
The current internal enclosure temperature is usually dis-
played permanently. In the event of an error message,
this alternates with the temperature display.
The unit is programmed using buttons 1 – 3 (fig. 17). The
relevant parameters also appear in the display.
6.1.2
Eco mode
All Rittal TopTherm cooling units with e-Comfort control-
ler from firmware 3.2 have the energy-saving eco mode,
which is enabled in the delivered state.
The eco mode is used to save energy in the heat ex-
changer if there is no thermal load, or there is a low ther-
mal load in the enclosure (e.g. standby operation, no
production or weekend).
During this process the evaporator fan in the internal cir-
cuit is switched off as appropriate if the actual internal
enclosure temperature drops to 10 K below the speci-
fied setpoint temperature. To ensure the internal tem-
perature is reliably measured during this process, the fan
starts cyclically for 30 sec. every 10 minutes (see fig. 18).
If the internal temperature drops to a range 5 K below
the setpoint set again, the fan switches back to contin-
uous operation.
Note:
The oil must be collected in the compressor
in order to ensure effective lubrication and
cooling.
Do not operate the cooling unit for at least
30 minutes after assembling the equipment.
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Содержание Rittal 3273 Series
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