6
D33351 - RTL 120/520 Eng.
24.06.15 AM
We reserve the right to make changes without notice
12. ADJUSTMENT OF ROOM TEMPERATURE READOUT
In some cases it is virtually impossible to find a suitable position for the unit or for the room sensor.
In this case, the true temperature of the room may be measured with a quality thermometer, and the reading shown
on the unit adjsuted accordigly.
This method should be adopted only if the user is confident in the quality of the thermometer, as the sensor for
measuring room temperature has a tolerance of less than +/- 0.3°C.
13. INTERNAL OR REMOTE ROOM SENSOR
The unit is fitted with an incorporated room sensor.
It will also accept an external room sensor when it is necessary to separate the sensor from the local unit. This may
be installed in an enclosed panel.
This option requires configuration.
14. PERMITTED FUNCTION CHOICES
The local unit may be configured in various ways, to tailor it to the user's needs.
For example:
– Change of the main parameters
– Display and/or change the basic technical parameters
– Possibility and limits for adjusting the desired temperature
– Possibility of changing the desired or maximum speed of the fan-coil fan
– Possibility of choice and/or preparation of the timed programs
– Various local permissions established by the Master
All these local permissions and configurations are fully explained in the Technical Data Sheet for the Master MRL
608 C1, via which the configurations can be made.
All configurations made via the Master may also be carried out via a local or remote PC.
15.
TIMED PROGRAMS
The local unit is provided with a full series of 24-Hour, 7-Day, Annual, special programs.
All programs can be created by the Master as well as locally (if permitted).
16.
ADJUSTING THE DESIRED ROOM TEMPERATURE & CHOICE OF TIMED PROGRAMS
By means of the local unit the user can select the desired program within the limits established by the Master.
The user may also adjust the desired room temperature within the terms and limits established by the Master.
17.
CREATION OF TIMED PROGRAMS
The user may create and/or modify all the timed programs, provided they are within the limits established by the
Master.
18. TECHNICAL SETTINGS
If permitted, it is also possible locally to intervene locally with a series of checks and settings of technical parameters
which are fully explained in the section devoted to screen displays.
It is also possible to program a local check for testing the electrical connections.
19. LOCAL CLOCK
The local unit has its own clock and calendar which are aligned as long as the connection with the MRL 608 master
unit remains active.
In the event that the master unit is out of service or is faulty, the room unit will keep the date and time aligned even
when there is no connection to the master unit. The date/time alignment will be lost if the power supply to the local
room unit fails. If this happens it is possible to reset the date and time by using the “EMERG.” (Emergency) menu
on the room unit (see display 5.0.1 on page 14).
20. SPECIAL PROGRAMS
The special programs which can substitute the program in use on the zone are:
– Programs enabled by activating the digital inputs E1, E2, E3 (REMOTE PROGRAM)
– YEARLY programs
– PR.LIMIT program (time limit program).
21. 0...10 VOLT OUTPUT COMBINED WITH THE RELAY OUTPUT
These two outputs may be programmed by means via the Master or a PC:
– RELAY OUTPUT ONLY = the system becomes virtually identical to RTL 110/510
– 0...10 Volt OUTPUT ONLY = only the 0...10 Volt output is active
– RELAY OUTPUT AND 0...10 Volt OUTPUT = the two outputs may be used together when required by the thermal
unit.
The relay + 0...10 Volt output combination is useful, for instance, when the thermal unit to be controlled has a valve
which intercepts the vector fluid and a 0...10 Volt input to progressively pilot the ventilator.
22. SEASON SWITCHING
Summer/Winter season switching of the zone (RTL...) may be carried out in three different ways (to be configured
on the MRL 608 Master or via computer)
1) AUTOMATIC (compensated part)
The zones will be switched as set on the MRL 608 Master, in function of the climate part (A or B) to which they are linked.
2) LOCAL SETTING
The zones may be switched individually, acting locally by pressing the keys on RTL ..., via the MRL 608 Master, or
via computer.
3) INPUT E1
The zones may be switched individually, using the RTL ... unit’s digital input E1
By connecting a switch to terminals P– / E1, the season setting of each single zone may be selected manually:
switch open = WINTER; switch closed = SUMMER.