User manual

Rittal enclosure cooling unit 27
7 Operation
EN
 Change the setpoint using the "Up" and "Down" ar-
rows or select the required temperature directly.
Setting range: 20°C (68°F)…50°C (122°F)
Factory setting: 35°C (95°F)
 Confirm your entry with "OK".
Alarm limit
This limit is used for an alarm message. The set value
must therefore be at least 3 K and up to a maximum of
15 K above the actual setpoint to which the cooling unit
is set.
For example:
– Setpoint: 35°C (95°F)
– Alarm limit min.: 38°C (100°F)
– Alarm limit max.: 50°C (122°F)
The setpoint must likewise be modified accordingly if the
control mode is changed.
 Click on the "Alarm limit" symbol.
 Change the setpoint using the "Up" and "Down" ar-
rows or select the required temperature directly (Fac-
tory setting: 38°C (100°F)).
 Confirm your entry with "OK".
7.4.2 Alarm relays
There are two floating relay outputs in the connection
box on the rear of the unit, which may be used to output
system messages from the cooling unit to an external
signal source (see section 5.4.3 "Connect the alarm re-
lays"). The relay outputs may be configured here.
 Click on the "Alarm relay" symbol to display a list of
lower-level screen pages.
Change NO/NC
The switch logic of the relay output, i.e. whether it is to
be used as a normally closed or normally open contact,
may be set here.
 Click on the "Change NO/NC" symbol.
 Choose your preferred switch logic by selecting it from
the display.
 Confirm your entry with "OK".
List of functions
This is where you specify which error messages should
lead to switching of the respective relay output.
 Click on the "Relay 1" or "Relay 2" symbol, and select
the alarm relay to which you wish to assign a function.
 From the list of errors, select the function which should
cause the previously selected relay output to switch.
 If applicable, assign further functions to the relay out-
put, and the output will then be switch if at least one
of the assigned functions leads to an error message.
 Confirm your entry with "OK".
 If applicable, configure the other relay output with oth-
er functions.
7.4.3 Language settings
All the unit's displays may be shown in different languag-
es. The languages "English" and "German" are available
as standard on the unit. Other languages may be in-
stalled using the RiDiag software or with the aid of an on-
line tool available on the Rittal website.
 Click on the "Display language" symbol.
 Page through to the required language using the "Up"
and "Down" arrows.
 Confirm the chosen language with "OK".
The language will change over immediately, and all
menu displays will appear in the chosen language.
7.4.4 Self-test
In the event of a malfunction in the unit which fails to pro-
duce an error message, it may be useful to check the
key functions of all components with a self-test. You
Symbol Parameter
Change NO/NC
Switch the alarm relay as a normally closed or
normally open contact.
List of functions
Allocation of a function to the respective alarm
relay.
Tab. 12: "Alarm relay" zone
Note:
For the factory setting of alarm relay alloca-
tion see section 7.6 "List of system messag-
es" (Tab. 15).
Symbol Parameters
Normally Open
Switch the alarm relay as a normally open con-
tact.
Normally Closed
Switch the alarm relay as a normally closed
contact.
Tab. 13: Switch logic of the alarm relay
Note:
The factory setting of the relay outputs in their
de-energised state is NO (Normally Open).
Symbol Parameter
Assign relay 1
Assign relay 2
Tab. 14: List of functions