Coster RTL 120 User manual

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D33351-RTL 120/520 Eng. 24.06.15 AM
We reserve the right to make changes without notice
3. SENSORS & ACCESSORIES
nº Description Model Sensing el. t° Code Data
Optional sensors
1 All types of SAB... and SAI 010 room sensors (wall-mounted or built-in) SAB/SAI NTC 10 kΩB1 N 111
LOCAL BUILT-IN OR WALL-MOUNTED
UNIT WITH 0...10 Volt RELAY OUTPUT
"MULTIZONE" SYSTEM
RTL 120 Eng. = built-in unit
LOC
P
1. BUILT IN LOCAL UNIT (SLAVE) WITH 0..10 VOLT– RELAY OUTPUT RTL 120
RTL 120 is the SLAVE unit in the "MULTIZONE" system for the control of temperature and other functions in the
single zone.
This unit can be housed in a standard 503 built-in enclosure.
– receives power from ALC 318 or ALP 418 auxiliary power supply units
– controls local thermal units by means of:
On-Off zone valve with 230 Volt ~ actuator and modulation unit with 0...10 Volt – input
On-Off zone valve with 24 Volt ~ (or other voltages) actuator, and modulation unit with 0...10 Volt – input
Zone valve with 24 Volt ~ (or other voltages) thermal actuator, and modulation unit with 0...10 Volt – input
Fixed or variable speed zone circulation pump
Zone burner or small boiler with 0...10 Volt – input in POWER or TEMPERATURE
On-Off valve and fan-coil ventilator switch with 0...10 Volt – input
Any other device that can be controlled via a three-point relay and with 0...10 Volt input –
– Internal or external room sensor
– Complete configuration of the limits and of the mode of use permitted to the user
– Three On-Off inputs to be programmed as required
– Ample display with simplified readout for less expert users
– Three intuititive use operational push-buttons for less expert users
– Ability to operate in the event of breakdown of the centralised control
RTL 120 is essentially a controller with exhaustive functions, selectable in order to adapt to the experience
level of the user, or to the desired discretion of the user
RTL 120 includes a base and an electronic unit:
– Built-in base + electronic unit = RTL 120
– Electronic unit to be inserted onto this base = RTL X20/F
2. WALL-MOUNTED LOCAL UNIT (SLAVE) WITH 0..10 VOLT– RELAY OUTPUT RTL 520
RTL 520 has the same functions of RTL 120, except that instead of being built-in it is fixed to the wall (when
503 enclosures are not envisaged).
RTL 520 has all the functions of RTL 120.
RTL 510 includes a base and an electronic unit:
– Wall-mounted base + electronic unit = RTL 520
– Electronic unit to be inserted onto this base = RTL X20/F
RTL 520 Eng. = wall-mounted unit
D 33351
24.06.15 AM

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D33351 - RTL 120/520 Eng. 24.06.15 AM
We reserve the right to make changes without notice
4. MAIN TECHNICAL DATA
• Elettrical
Power supply 13 V –
Maximum consumption 30 milliWatts
Protection IP40
Radio disturbances VDE0875/0871
Vibration test with 2g (DIN 40 046)
Voltage-free output contacts:
maximum switched voltage 250 V ~
maximum switched current 5 (1) Amp
Construction standards CEI
• Mechanical
Enclosure Built-in or wall-mounted
Materials :
base NYLON
cover ABS
Ambient temperature:
operating 0 … 45°C
storage – 25 … + 60°C
Ambient humidity class F DIN 40040
• Heating/Conditioning programs for individual zones
24-hour programs 1 … 6 ... 7
24-hour times 6
Weekly programs: 0 …1... 7
Programs with limited time (P.LIMIT.) 1
Maximum time limited to 7 days and 23 hours
Annual programs 1...5
• Internal or remote room sensor
Measurement range 0 … + 50 °C
Sensor error +/– 0.3 °C
5. MECHANICAL DIMENSIONS
• Programming for local use
Each zone can be personalised to adapt it to the user
• Operativity zone
Each zone can be programmed individually if it is:
COMPLETELY OPERATIVE
PARTIALLY OPERATIVE
NOT OPERATIVE (under maintenance)
• Name of zone
Each local unit can be assigned an individual name
• Groups of local units & names
Each local unit can be assigned to a group so as to operate as
a group instead of as a single unit. To each group a name can
be assigned
Number of groups 0 … 9
• Relay output
Relay for selection heating/conditioning. 1
• 0...10 Volt output
Maxiumum input load 1mA
Min. and Max. limits settable via the Master
• Local alarm system
All the alarm functions are available in order to have instanta-
neous control of the zone situation
• "E" auxiliary inputs
Ingressi ausiliari programmabili 3
Acquisition times :
Switch minimum 300 msec.
Button minimum 150 msec.
• Management by Master
Via P-Loc Bus
1 - Button for increasing value of the parameter (UP)
2 - Button for reducing value of the parameter (DOWN)
3 - Button for selecting parameter, page or menu
4 - Display
5 - Room temperature sensor
6 - Groove for screwing the electronic unit to the built-in base
7 - Groove for screwing the electronic unit to the
wall-mounted base
8 - Potentiometer for adjusting display contrast
9 - Socket for updating software (for technical staff only)
2
4
3
5.1Built-in base 5.2RTL X20/F electronic unit
1
5
6
7
8
9
39,5
2
1
2
3
50
83,2
92
1 - Terminals for plugging in the electronic unit
2 - Tabs for attaching the built-in enclosure with rubber caps
3 - Hole for the screw securing the electronic unit to the built-in base;
this is to avoid theft of, or tampering with, the electronic unit
66
44
25

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D33351-RTL 120/520 Eng. 24.06.15 AM
We reserve the right to make changes without notice
5.4Exploded drawing of built-in RTL 120 with three-module
503 enclosure
1 - Shoulders to be used only with frames wider than the electronic unit ,
to cover excess space.
2 - Electronic unit to be inserted onto the built-in base.
3 - Screws for securing built-in frame/base/rack.
4 - Frame for any model and/or supplier.
5 - Built-in base.
6 - Screw to secure the electronic unit to the built-in base, to avoid
theft or tampering.
7 - Three-module 503 enclosure for wall recessing.
5.5Exploded drawing of wall-mounted RTL 520
2
3
1
4
5
6
7
1 - Base for wall-mounting.
2 - Terminal block for the electronic unit.
3 - Screw to secure the electronic unit to the built-in base, to avoid
theft or tampering.
4 - Cover with rotary connection.
5 - Screw for securing cover to base.
6 - Small screw cover.
7 - Electronic unit.
118
82
36,6
5.3RTL 520 local wall-mounted unit
2
13
1 - Electronic unit to be inserted into the wall-mounted base
2 - Cover for the wall-mounted base
3 - Base for wall mounting.
2
5
3
1
7
6
3
4

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D33351 - RTL 120/520 Eng. 24.06.15 AM
We reserve the right to make changes without notice
6. WIRING DIAGRAMS
6.1RTL 120 built-in zone unit
7. SITING DEVICES
7.1Controller
The controller must be sited in a dry space which meets the ambient conditions described above.
7.2Unit with internal room sensor
In this instance the room sensor is internal; the device has to be installed in a position where it can monitor the true
room temperature of the space in question.
It must be sited far away from sources of heat such as: windows, radiators and chimneys so that the room tempe-
rature can be measured without thermal disturbances.
7.3Unit with remote (separate) room sensor
In this instance the room sensor is external to the device.
The room sensor must be installed in a place representing the true room temperature (see section 7.2); whilst
the device itself can be installed where it is most convenient, since it is not the device itself which measures the
ambient temperature.
8. ELECTRICAL CONNECTIONS
• Wire in accordance with the diagram and in respect of applicable regulations, using the following cable types:
– 1.5 mm2for the relay control outputs.
– 1 mm2for sensors and for the auxiliary service switches.
– 1 mm2 for the P-Loc and power supply; for complex sites see Master MRL 608 C1 Technical Data Sheet,
sections 11, 12 and 13.
It is advisable not to insert more than two cables in a single terminal of the controller and, if necessary, to use ex-
ternal terminals.
B1 – Remote room sensor (if used)
E1 – First AUXILIARY SERVICE switch or
SEASON SWITCHING
E2 – Second AUXILIARY SERVICE switch
E3 – Third AUXILIARY SERVICE switch
G– Power supply (13 Volt–)
P– – Cold pole of P-Loc
0 Volt of the Y 0...10Volt output
P+ – Hot pole of the P-Loc
Y– 0...10 Volt output
1,2,3 – Control output relay switches
The local unit REQUESTS heat (HEAT) or Cold (COND)
1, 2 = SWITCH CLOSED
2, 3 = SWITCH OPEN
The local unit DOES NOT REQUEST heat (HEAT) or cold (COND)
1, 2 = SWITCH OPEN
2, 3 = SWITCH CLOSED
WARNING: THE SWITCHES ARE SHOWN IN THE POSITION IN WHICH THE UNIT REQUESTS
HEAT (HEATING), OR COLD (CONDITIONING)
6.2RTL 520 wall-mounted zone unit
M – All input 0 Volt
B1 – Remote room sensor (if used)
E1 – First AUXILIARY SERVICE switch or
SEASON SWITCHING
E2 – Secondo AUXILIARY SERVICE switch
E3 – Third AUXILIARY SERVICE switch
G– Power supply (13 Volt–)
P– – Cold pole of P-Loc
0 Volt of the Y 0...10Volt output.
P+ – Hot pole of the P-Loc
Y– 0...10 Volt output
1,2,3 – Control output relay switches
The local unit REQUESTS heat (HEAT) or cold (COND)
1, 2 = SWITCH CLOSED
2, 3 = SWITCH OPEN
The local unit DOES NOT REQUEST heat (HEAT) or cold (COND)
1, 2 = SWITCH OPEN
2, 3 = SWITCH CLOSED
WARNING: THE SWITCHES ARE SHOWN IN THE POSITION IN WHICH THE UNIT REQUESTS
HEAT (HEATING), OR COLD (CONDITIONING)
1 2 3
B1 E1E2 E3 GP– P+ YM
T
B1
E1 E2 E3
Contatti Comando Riscaldamento/Condizionamento
and Power supply
LOC
P
Y
0...10 Volt
t˚
COSTER
RTL 120
P+ = P-LOC BUS
P- / Y = 0...10 V DC OUTPUT
P- = 0V POWER SUPPLY AND P-LOC BUS
G = DC POWER SUPPLY
P- / E1,E2,E3 = AUXILIARY INPUTS
P- / B1 = REMOTE SENSOR
123
B1 E1 E2 E3 GP P+Y
t˚
SCREW
M / B1 = REMOTE SENSOR
M / E1,E2,E3 = AUXILIARY INPUTS
M / Y = 0....10V DC OUTPUT
P- = BUS P-LOC
COSTER
P+ = BUS P-LOC
RTL 520
G = DC POWER SUPPLY.
E3 P+ YE2 PB1 E1MG
23 1
Power from
ALC 318 or ALP 418

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D33351-RTL 120/520 Eng. 24.06.15 AM
We reserve the right to make changes without notice
9. COMMUNICATION BUS P-LOC & POWER SUPPLY
These matters are dealt with fully in technical specification regarding the Master of the “MULTIZONE” MRL 608
system.
10. GENERAL FUNCTIONS
All the functions ofi RTL 120 and RTL 520 are exactly the same; the two devices differ only in regard to mechanical
aspects and to the way they are installed.
11. TEMPERATURE CONTROL
The unit is essentially a room temperature controller which can function in several different ways, and with several
different configurations, in order to best adapt to the ambient conditions it must control.
All the controller's main configuration parameters are set via the Master, which then sends them to the controller.
11.1Basic control to create the Controller Output
The system comprises a basic algorithm for ambient control which is the same in each configuration.
This basic controller essentially calculates, without interruption, the CONTROLLER OUTPUT, i.e. the POWER (hot
or cold), which the thermal unit (radiator, fan-coil or similar) has to deliver.
The basic controller may function in the following modes:
– PROPORTIONAL + INTEGRAL
– PROPORTIONAL ONLY
– INTEGRAL ONLY
Choice of the correct option depends on the difficulties the controller may face in operating correctly.
The PROPORTIONAL + INTEGRAL mode is usually the best suited.
The PROPORTIONAL BAND and/or Integral Time are parameters which require setting.
The factory (DEFAULT) settings are usually satisfactory.
These parameters are set independently for heating and conditioning control.
CONTROLLER OUTPUT (power required) results from the base controller's calculations.
CONTROLLER OUTPUT may be processed in various ways to adapt to the thermal unit.
The base controller is also provided with a neutral zone (adjustable from 0 to 3°C) as an acceptable room tempe-
rature tolerance range within which the thermal unit is not adjusted, in order to avoid too many interventions.
11.2Control of the output relay
The output relay may be controlled in two modes:
– PURE ON/OFF = the output relay is switched ON when the thermal unit must be switched on and vice versa.
– PROPORTIONAL ON/OFF= the output relay is controlled cyclically with a programmable cycle duration.
This is a more sophisticated way of controlling the thermal unit in order to limit thermal excursions.
Factory setting: the output relay is set to PURE ON/OFF (the simplest mode).
11.3 0...10 Volt output proportional to REQUIRED POWER (CONTROLLER).
This output is necessary when the thermal unit to control has a 0...10 Volt input to pilot power issued.
For instance:
– FAN-COIL VENTILATOR SPEED CONTROL
– SMALL AIR-TREATMENT UNIT VENTILATOR SPEED CONTROL
– VARIABLE SPEED PUMP SPEED CONTROL
– BOILER POWER OR TEMPERATURE CONTROL
– ANY THERMAL UNIT WITH A 0...10 Volt INPUT
This output is proportional to the controller and therefore to the power required of the system at any specific time.
A minimum and maximum voltage limit may be set for the output, for instance:
– to guarantee minimum ventilation even when no thermal power is required
– to limit the top speed or power to avoid inconvenient noise or draughts.
11.4Values of the CONTROLLER OUTPUT for ON/OFF of the relay controlled as PURE ON/OFF.
To better adapt to different circumstances, the threshold at which the output relay is switched ON and OFF may
be set:
– CONTROL VALUE to switch ON the relay = 90% of the power (factory setting).
– CONTRO VALUE to switch OFF the relay = 10% of the power (factory setting).
11.5Cycle time for ON/OFF of relay controlled as ON/OFF PROPORTIONAL.
The cycle time is adjustable: default = 300 seconds.
11.6Minimum ON and OFF times of output relay.
In whatever mode the output relay is controlled you can establish a minimum time for which it must remain ON and
a minimum time for which it must remain OFF.
This function is very useful to avoid overworking the thermal unit when, for example, it is a wall-mounted gas
boiler.
11.7Heating and conditioning.
Control is provided for both heating or for conditioning the room.
This control order is received by the Master which has several modes for deciding on the basis of the type of
installation and the use.

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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 congurations 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.

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D33351-RTL 120/520 Eng. 24.06.15 AM
We reserve the right to make changes without notice
23. STANDARD DISPLAY & PUSH-BUTTON PANEL FOR RTL 120 and RTL 520
Indication of the status of the internal relay (technical information)
= calls heat in winter and conditioning in the summer
2 1 5 c
2 4 H R 1 1 1 5 9
Zone reserved for measured or desired tem-
perature, or to other operational indications.
Zone reserved for timed programs, at pre-
sent time, at external temperature or under
other operational conditions.
Zone with winter control
(technical information)
Zone with summer control
(technical information)
Mobile bar proportional to
requested power
(technical information)
"UP" button
"DOWN" button
"OPERATIONAL CHOICE" button
GENERAL RULE FOR USE OF THE PUSH-BUTTONS:
= SCROLLING PAGES TO SELECT THE PARAMETER TO BE VIEWED OR MODIFIED.
THE CHOSEN PARAMEER FLASHES
o= ADJUSTMENT OF PARAMETER WHICH IS FLASHING
AFTER THE LAST DEPRESSION OF ONE OF THE TWO PUSH-BUTTONS THE PARAMETER CONTINES TO
FLASH FOR A FEW SECONDS BEFORE RETURNING TO NORMAL CONDITIONS
= THE FLASHING PARAMETER IS CANCELLED BY PRESSING THE TWO PUSH-BUTTONS TOGETHER
As already described in both the Technical Data Sheet for the MRL 608 C1 Master and in this document, the RTL 120 / 520
local unit may be congured in a number of different ways to adapt to the user’s requirements. Given the high number of
possible combinations, it may be useful to compile a Memo to recall them.
An example is offered below.
The functions are set on certain pages of the Master; the Memo must make reference to these pages.
The form is as follows:
Description of the function ------------------------ X.X.X where:
Description of the function = explanation of the function in question. Example: possibility of choosing programs
X.X.X = explanation of the function in question. Example: possibility of choosing programs.
= function not allowed
= function allowed
This Memo is useful for the site manager to recalling the custom settings of each individual local unit, without always having to view them on the
Master or on the PC.
In the illustrations of the individual “screen shots” of the local unit these Memos are indicated.

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D33351 - RTL 120/520 Eng. 24.06.15 AM
We reserve the right to make changes without notice
0.0.0 2 1 5 c
2 4 H R 1 1 1 5 9
P r o G
2 4 H R 1
24. MENU N. 0 FOR USER Permission
Page n. Display Description Memo
TO SET THE DESIRED ROOM TEMPERATURE. = UP = DOWN
The following options may be given to the user :
– No adjustments permitted ------------------------------------------------------------------------------------------------------------------- 10.0.7
– Adjustment allowed within a certain up/down range ------------------------------------------------------------------------- 10.0.10...13
– Adjustment duration limit:
- timed: the adjustment is valid only for a maximum time period (settable) of up to 24 hours ---------------------------- 10.0.9
- time period: the adjustment is cancelled when time band changes ------------------------------------------------------------ 10.0.8
- indefinite: the adjustment is always valid----------------------------------------------------------------------------------------------- 10.0.8
WARNING: LOCAL ADJUSTMENT OF DESIRED ROOM TEMPERATURE IS NOT PERMITTED IN PROGRAMS
“OFF”, “FROSP” and “HEATP"
TO SELECT THE DESIRED PROGRAM: PRESS THE FOLLOWING PAGE APPEARS
User may or may not be allowed choice:
– Choice allowed----------------------------------------------------------------------------------- 10.0.2
24HR1= flashes; One of the following programs may be selected:
– 24HR1...7 = 24-hour programs from 1 to a maximum of 7.
– 7DAY1...7 = 7-day programs from 1 to a maximum of 7.
The indication "7DAY" alternates with program associated with actual day of
week.
– P. LIM. : P. LIM allows the associated program to be selected. This choice is limited over
time (Program LIMited), up to a maximum of 7 days and 23 hours.
The indication “P.LIM” alternates with the associated program.
– MAN = Manual program: the same temperature, adjsuted as desired, is maintained. Essen-
tially, the zone unit is converted into a thermostat with no time settings.
– FROSP = the FROSP program with temperature as desired. The frost protection tempera-
ture has a lower limit set in the Master on page 21.0.15 .
– OFF = always Off.
– HEATP = if control is in summer mode, HEATP appears instead of FROSP
PRESS TO CHOOSE DESIRED PROGRAM
0.0.1
– – – = no temperature seen (NO TEMP. SEEN)------------------------------------------------------ 10.0.5
21.5 c = actual room temperature (SEE ACTUAL T) ------------------------------------------------ 10.0.5
21.0 c = desired room temp. (SEE DES T)------------------------------------------------------------- 10.0.5
21.5 c = actual & desired room temp. (SEE ACT+DES T) ----------------------------------------- 10.0.5
When viewing desired T is permitted, local variations may be viewed directly from the tempe-
rature readout, which rises and falls. When viewing desired T is not permitted, variations may
only be viewed as values with plus or minus signs.
24HR1= Program in operation.
11.59 = Current time. The user may be allowed the following options:
– Viewing current time only --------------------------------------------------------------------- 10.0.6
– Viewing of current time alternating with outside T ------------------------------------- 10.0.6
ProG = The desired program choice menu is open
WARNING:
The number of 24HR &
7DAY programs may be set
via the MRL 608 C1 Master
WARNING: APPLIES TO USE IN SUMMER
DESIRED ROOM TEMPERATURE MAY CHANGE AUTOMATICALLY IF SUMMER COMPENSATION HAS BEEN ACTIVATED
BY THE MASTER: THIS COMPENSATION HAS A MAXIMUM LIMIT (MRL 608 C1 pages 3.0.10, 11 and 12).
L O C
W - S : W
If the season switching is configured: LOCAL SETTING.
The display will show (before page 0.0.1) this readout, with a flashing letter correspon-
ding to the initial of the current season (W = Winter, S = Summer).
PRESS TO SELECT THE SEASON
This setting can also be carried out via the MRL 608 Master.

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D33351-RTL 120/520 Eng. 24.06.15 AM
We reserve the right to make changes without notice
D X H 1 X X X X
1.0.0
24HR1=flashes: select the program to be viewed and, if required, modify using buttons
Before ashing ceases (about 5 seconds) press twice more, rapidly, to access details of
the program to be viewed or modied.
User has the following options:
– View and set or modify any parameter------------------------------------------------- 20.0.27
– View e select timed programs ------------------------------------------------------------- 10.0.2
– View times only -------------------------------------------------------------------------------- 10.0.3
The page format differs depending on the program accessed:
P r o G
2 4 H R 1 1 1 5 9
25. MENU NO. 1 PROGRAM VIEWING AND SETTING (if permitted) Permission
Page n. Display Description Memo
1.0.1
This menu allows simple viewing, setting or modifying of all timed and other programs. Viewing mode allows the settings of the
programs to be checked only, but not modied.
View & Set allows them to also be modied as desired. The maximum number of 24-hour or 7-day programs may be established
by the Site Manage via the MRL 608 C1 Master .
TO VIEW, (and, if permitted, modify) THE PROGRAMS. PRESS THE FOLLOWING PAGE APPEARS:
24 HOUR PROGRAMS
X X X c
XX.X°c = Desired temperature in the time period
D.X: = 24-hour program chosen to be viewed or modified
H.1: = First time period
XX.XX: = Start time of period to be viewed or modified flashes
PRESS TO SELECT THE PARAMETER TO BE VIEWED OR MODIFIED.
PRESS TO MODIFY (IF PERMITTED)
Continue until all the starting times of the time periods and the 6 desired temperatures are set.
M O N 2 4 H r X
1.0.2
7-DAY PROGRAMS
7 d X
7d. X = Indicates “7DAY X” in progress"
MON.: = Day of week
24Hr. X: = Program to associate with the day of the week
PRESS TO SELECT DAY OF WEEK TO WHICH TO ASSIGN THE PROGRAM.
PRESS TO CHOOSE THE PROGRAM TO ASSIGN.
The choice is between 24Hour 1...7, MAnual, Frosprot (Heatp) OFF
Continue until all 7 days of the week are completed.
The choice of the programs described above may be replaced by other types of programs imposed by different conditions.
These different conditions are linked to the three auxiliary switches E1, E2 and E3, and to one of the five settable annual programs.To
each of these conditions, any chosen program may be associated (via Master or via PC). If more than one of these conditions is present,
the priority order is: E1, E2, E3, ANNUAL.
Priority means that the first condition to appear in the list prevails.
The only condition present or the first in order of priority, is indicated as follows:
– E1 = XXXX alternating with the associated program. XXXX is the name given to input E1; default: HELP (call)
– E2 = XXXX alternating with the associated program. XXXX is the name given to input E2; default: WIND (window open)
– E3 = XXXX alternating with the associated program. XXXX is the name given to input E3; default: ABSE (absent)
– ANNU. X = an annual period is running with an associated program. ANNU X alternates with the program.
It is possible to adjust the annual program setting locally ------------------------------------------------------------------ 10.0.4
Local adjustment of the annual program is useful when the user wishes to use heating/conditioning even when the system
is off as an annual program is in operation (e.g. HOLIDAY PERIOD). USER MUST REMEMBER TO RESET THE PREVIOUS
PROGRAM WHEN LEAVING. This operation can be carried out using the same procedure used for choosing the programs
(Page number 0.0.1)
WARNING: when a program is set using the auxiliary switches E1, E2 or E3, user may adjust the desired room temperature as
if it were not a set program.
PARTICULAR CASES OF PROGRAMS SET BY EXTERNAL FUNCTIONS
24. MENU N. 0 FOR USER Permission
Page n. Display Description Memo

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D33351 - RTL 120/520 Eng. 24.06.15 AM
We reserve the right to make changes without notice
M A N 1 1 5 9
1.0.4
1.0.5
MANUAL OPERATION PROGRAM
X X X c
XX.X°c = Required temperature for the MANUAL program
PRESS TO ADJUST REQUIRED TEMPERATURE (IF PERMITTED) WHEN
MANUAL PROGRAM IS SELECTED
This is the starting temperature in MANUAL mode, which may always be adjusted as desired in
“NORMAL” zone use mode.
This is the temperature selected when the “MANUAL” function is included in any other program.
F R O S P 1 1 5 9
FROSPROT OPERATION PROGRAM
X X X c
XX.X°c = Required temperature for the FROSPROT program
PRESS TO ADJUST REQUIRED TEMPERATURE (IF PERMITTED) WHEN
FROSPROT PROGRAM IS SELECTED
This is the starting temperature in FROSP mode, which may always be adjusted as desired for the
zone.
This is the temperature selected when the “FROSP” function is included in any other program.
During summer operation, instead of the FROSP function the HEATP function may be
programmed.
25. MENU NO. 1 PROGRAM VIEWING AND SETTING (if permitted) Permission
Page n. Display Description Memo
P L I M X X d X X h
1.0.3
LIMITED TIME PROGRAM (P LIM)
X X X X
XXXX = Program to assign for this function for limited time : MAn, Heap (or FroP), OFF, 24 Hr, 7d. x
P.LIM. = Indicates that limited time program is in operation
XXd = Duration in number of days (max 7)
XXh = Number of hours (max 23) to add to the set number of days
PRESS TO CHOOSE DURATION IN DAYS & HOURS, AND PROGRAM TO ASSIGN
TO THIS LIMITED TIME.
Any program may be selected.
PRESS TO ASSIGN A VALUE TO THE CHOSEN PARAMETER
Example:
P L I M 0 0 d 0 9 h
M A n
MAn = Manual operaton has been selected for this limited period
00d = Zero-day duration
09h = Nine-hour duration
EXAMPLE:
WHEN YOU CHOOSE THE LIMITED TIME PROGRAM DURATION THE SYSTEM IS FORCED
TO OPERATE IN MANUAL MODE FOR 9 HOURS.
THIS IS USED, FOR INSTANCE, WHEN THE ZONE IS SWITCHED OFF AND USER WANTS TO
SWITCH ON HEATING FOR A CERTAIN PERIOD OF TIME, AFTER WHICH NORMAL
CONDITIONS ARE RESTORED.

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D33351-RTL 120/520 Eng. 24.06.15 AM
We reserve the right to make changes without notice
2.0.0 GR. = "COMPUTER OUTPUT”: essentially this is the percentage power in respect of the maximum that
the controller requests at any specific moment (heat in winter & cold in summer)
XXX = percentage of the power requested
t E S t
G R X X X
26. MENU NO. 2 ... 5 TECHNICAL SETTINGS (if permitted)
Page n. Display Description
2.0.3
The RTL 520 zone controller has 4 technical setting menus. Access to, display of, or amendments to the data are established by
the conguration of the zone which has made MRL 608 C1 the master.
This allows the administrator to also make technical settings locally, subsequently removing this option, preventing the user of
the zone from interfering with said technical settings, even inadvertedly.
TO ACCESS THIS MENU: PRESS FOR AT LEAST 15 SECONDS, UNTIL "TEST" APPEARS.
REMEMBER THAT THESE MENUS ARE ADDRESSED TO TECHNICAL STAFF
2.0.4
26.1 MENU NO. 2 "CHEC" = READOUT OF TECHNICAL DATA
Page n. Display Description
PRESS THE FOLLOWING PAGE APPEARS:
PRESS THE FOLLOWING PAGE APPEARS:
T.A.R. = Actual Room Temperature measured
XX.X c = Value of measured room temperature
t E S t
T A R X X X c
PRESS THE FOLLOWING PAGE APPEARS:
T.A.D. = Desired Room Temperature
21.0 c = Value of Desired Room Temperature
t E S t
T A D 2 1 0 c
PRESS THE FOLLOWING PAGE APPEARS:
AL. = Alarms for local functions
– – – – – – – = indication of the 8 alarms of the zone unit
–= Alarm not present
X= Number representing the alarm present
1= Lack of communication with Master
2= Room temperature sensor not in operation
3= Minimum room temperature limit exceeded
4= Maximum room temperature limit exceeded
5= Room control outside limits
6= Outside temperature not received
7= Alarm used only for RTL X11
8= Clock not consistent
t E S t
A L – – – – – – – –
PRESS THE FOLLOWING PAGE APPEARS:
d.T.V.L. = Difference of the Desired Local Temperature (+ or –) set by the user
± 0.0 c = Value of the difference
t E S t
d T V L 0 0 c
WARNING: WHEN ANY ALARMS ARE ACTIVE, THE INDICATION OF THE TIME FLASHES ALTERNATING WITH “ALA”,
INSTEAD OF WITH THE OUTSIDE TEMPERATURE.
2.0.1
2.0.2

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D33351 - RTL 120/520 Eng. 24.06.15 AM
We reserve the right to make changes without notice
2.0.6
3.0.0
26.2 MENU NO. 2 "CHEC" = READOUT OF TECHNICAL DATA
Page n. Display Description
PRESS THE FOLLOWING PAGE APPEARS:
d.T.V.R. =Difference of Desired Remote Temperature (+ or –), set by site manager by means of the
MRL 608 C1 Master
± XX.X c = Value of the difference
d T V R X X X c
PRESS THE FOLLOWING PAGE APPEARS:
ZONE CL. = Compensated Zone: the compensated part to which the zone belongs
A = Compensated Part A
b = Compensated Part B
This choice is made on page 20.0.26 of the MRL 608 C1 Master
Applies if season switching is: AUTOMATIC (COMPENSATED PART)
t E S t
Z O N E C L A
PRESS THE FOLLOWING PAGE APPEARS:
S – W = Indicates if the zone is operating in Summer or Winter mode
W = Winter
S = Summer
t E S t
S – W : W
"TEST" MENU COMPLETED:
PRESS TO RETURN TO THE START OF THIS MENU
PRESS TO GO TO THE NEXT TECHNICAL MENU
PRESS TO GO TO THE PREVIOUS TECHNICAL MENU
t E S t
26.3 MENU NO. 3 "CONF" = LOCAL CONFIGURATION
Page n. Display Description
PRESS THE FOLLOWING PAGE APPEARS:
ADD. = Telematic address of the Bus P-Loc of the zone.
XXX = Set desired address using push-buttons.
PRESS THE FOLLOWING PAGE APPEARS:
GRUP. = The Group to which the zone belongs.
X = Number of the Group
This number may be changed using the push-buttons, locally as well as via the MRL 608 C1 Master.
C O n F
G R U P X
C O n F
A D D X X X
2.0.5
2.0.7
3.0.1
PRESS THE FOLLOWING PAGE APPEARS:
APPA = This page refers to the local device being used
RTLX20E = the electronic unit of the Slave RTL 520 or RTL 120
XX = Software version
These indications are the local unit's ID card.
t E S t
O 1 0 V o L t X X X
PRESS THE FOLLOWING PAGE APPEARS:
A P P A
R T L X 2 0 E X X
O10VoLt = 0...10 Volt modulating output
XX.X = Actual value of output
2.0.8

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D33351-RTL 120/520 Eng. 24.06.15 AM
We reserve the right to make changes without notice
4.0.0
26.5 MENU NO. 4 "TEST" = TESTING Permission
Page n. Display Description Memo
PRESS THE FOLLOWING PAGE APPEARS:
IN.E1 = the logical status of the first auxiliary input (E1) is displayed.
OFF = Logical status Off
ON = Logical status On
WARNING: the logical status corresponds to the real position of the switch if it has been configured :
LOGICAL STATUS ON = SWITCH CLOSED. If, on the other hand:
LOGICAL STATUS ON = SWITCH OPEN the indication is reversed (pag. 17.0.3 Master)
T E S T
I N E 1 O F F
PRESS THE FOLLOWING PAGE APPEARS:
IN.E2 = The logical status of the first auxiliary input (E2) is displayed.
OFF = Logical status Off
ON = Logical status On
WARNING: the logical status corresponds to the real position of the switch if it has been configured :
LIVE LOGICAL STATUS = SWITCH CLOSED. If, on the other hand:
LIVE LOGICAL STATUS = SWITCH OPEN the indication is reversed (page 17.0.7 Master)
T E S T
I N E 2 O F F
PRESS THE FOLLOWING PAGE APPEARS:
T E S T
I N E 3 O F F
PRESS THE FOLLOWING PAGE APPEARS:
O.1 = The zone unit's relay output can be controlled
NOTE: LEAVE AN INTERVAL OF AT LEAST 3 SECONDS BETWEEN BUTTON
DEPRESSIONS
T E S T
O 1 O F F
4.0.1
4.0.2
IN.E3 = The logical status of first auxiliary input (E3) is displayed.
OFF = Logical status Off
ON = Logical status On
WARNING: the logical status corresponds to the real position of the switch if it has been configured:
LIVE LOGICAL STATUS = SWITCH CLOSED. If, on the other hand :
LIVE LOGICAL STATUS = SWITCH OPEN the indication is reversed (page 17.0.11 Master)
PRESS THE FOLLOWING PAGE APPEARS:
CORR.tA = Correction of room temperature measurement
± X.X c = value of the correction
Room Temperature measurement may be corrected on this page to align it with a
measurement made using external devices.
As the sensor incorporated in the zone unit has a tolerance of ± 0.3 °C, the correction is scar-
cely meaningful: the function has been allowed for psychological reasons, so that the user may
measure room temperature with a trusted device and set the unit accordingly.
This function is also of use when the installation site of the zone unit is open to thermal
disturbances, as it allows compensation.
C O n F
C O R R t A X X c
3.0.2
26.4 MENU NO. 4 "CONF" = READOUT OF TECHNICAL DATA
Page n. Display Description
"TEST" MENU COMPLETED:
PRESS TO RETURN TO THE START OF THIS MENU
PRESS TO GO TO THE NEXT TECHNICAL MENU
PRESS TO GO TO THE PREVIOUS TECHNICAL MENU
PRESS THE FOLLOWING PAGE APPEARS:
O 1 0 V o L t = The 0...10 Volt output may be adjusted in 1-volt steps pushing buttons
NOTE: LEAVE AN INTERVAL OF AT LEAST 3 SECONDS BETWEEN BUTTON
DEPRESSIONS
T E S T
O 1 0 V o L t X X
"TEST" MENU COMPLETED:
PRESS TO RETURN TO THE START OF THIS MENU
PRESS TO GO TO THE NEXT TECHNICAL MENU
PRES TO GO TO THE PREVIOUS TECHNICAL MENU
PRESS TO GO TO THE PREVIOUS TECHNICAL MENU
4.0.3
4.0.4

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D33351 - RTL 120/520 Eng. 24.06.15 AM
We reserve the right to make changes without notice
26.6 MENU NO. 5 "EMERG" = SET OF PARAMETERS FOR USE IN EMERGENCY Permission
Page n. Display Description Memo
PRESS THE FOLLOWING PAGE APPEARS:
S – W : W = To set Summer or Winter zone unit operation in “EMERGENCY” mode.
This function is useful to inform the various units in case of communication breakdown with the MRL
608 C1 Master.
This parameter may be configured via the Master twice a year, in order to ensure correct operation of
all the zones, even in case communication breakdown with the Master. Obviously, all required alarms
are activated.
This page does not appear if season switching is congured as: LOCALE SETTING
or INPUT E1.
S E t
S – W : W
PRESS THE FOLLOWING PAGE APPEARS:
The internal clock of the zone unit may be adjsuted using this page.
This clock acts as an emergency backup of the centralised clock in the Master, should a
communication breakdown occur.
XXX. = Set the day of the week.
XX.XX = Set the time.
S E t
X X X X X X X
This menu provides information on how the zone unit must operate in “EMERGENCY” mode, i.e. when communication with the
MRL 608 C1 Master, which normally sends this data, is defective or interrupted. The title of this menu is “SEt” (meaning EMER-
GENCY “SEtting")
"SEt" (EMERGENCY) MENU COMPLETED :
PRESS TO RETURN TO THE START OF THIS MENU
PRES TO GO TO THE “END” PAGE OF THE TECHNICAL SETTINGS MENUS
PRES TO GO TO THE PREVIOUS TECHNICAL MENU
THE “END” PAGE TURNS AUTOMATICALLY TO THE FIRST PAGE AFTER A FEW SECONDS
5.0.0
5.0.1

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D33351-RTL 120/520 Eng. 24.06.15 AM
We reserve the right to make changes without notice
2 0 0 c
2 4 H 1
7 d 1
27. USER INSTRUCTION QUICKSHEET
A single small sheet (front & back) provides
a summary of the main functions which the
user of the local unit has to carry out.This
sheet is plastic-coated for everyday use.
If the user is only an occasional one, the local unit
may be configured to allow only the desired
room temperature to be adjusted, or possibly
some programs to be chosen. In this case,
only the front page of the sheet (FRONT) is
required)
FRONT
VIEWING AND/OR SETTING OF PROGRAMS
Viewing and setting of programs may or may not be permitted by the Master.
After entering this menu, scroll to the end to exit. Exit will in any case be automatic after 15
minutes.
SELECT THE PROGRAM TO BE VIEWED OR MODIFIED, AS PREVIOUSLY INDICATED.
BEFORE THE FLASHING CEASES, PRESS TWICE RAPIDLY TO ENTER THE VIEWING
AND/OR SETTING MENU
24-HOUR PROGRAMS
D 1 H 1 0 6 0 0
2 0 5 c
20.5°c = Temperature required for time period indicated
D.1: = 24-Hour program chosen to be viewed or modified
H.1: = First time period (6 time periods possible)
06.00: = Start time of period to be viewed or modified
To eliminate time periods not required press simultaneously
PRESS TO SELECT THE PARAMETER
PRESS or TO MODIFY THE PARAMETER
Continue until all 6 time periods and 6 desired temperatures are set..
7-DAY PROGRAMS
M O N 2 4 H r 1
7d.1 = 7-day program to be viewed or modified
MON = day of the week
24Hr 1 = Program to assign to day of week
PRESS TO SELECT THE PARAMETER
PRESS or TO MODIFY THE PARAMETER
Continue until all the 7 days of the week are completed.
LIMITED-TIME PROGRAMS (P. LIM)
P L I M 0 0 d 0 5 h
24H1 = Program to assign to limited time
P.LIM. = Indicates that P. LIM program is in operation
00d = Number of days for limited time (max 7 days)
05h = Number of hours for limited time (max 23 hours)
PRESS TO SELECT THE PARAMETER
PREMERE or TO MODIFY THE PARAMETER
MANUAL PROGRAM
M A N 1 1 5 9
20.0 c = Temperature for MANUAL mode
MAN. = Indicates that MANUAL program is in operation
11.59 = Current time
PRESS TO SELECT THE PARAMETER
PRESS or TO MODIFY THE PARAMETER
FROSPROT OR HEATP PROGRAM
CONTROLLI
ENERGIA
TEMPERATURA
COSTER
Same procedure as for MANUAL PROGRAM, except that “FROSP” or
“HEATP” appear instead of "MAN"
SIMPLIFIED USE
MANUAL
RTL 520 & RTL 120
TO CONTROL DESIRED ROOM TEMPERATURE.
2 1 5 c
24 H R 1 1 1 5 9
= UP
= DOWN
Adjustment of desired room
temperature may be:
– TEMPORARY
– TIMED
– INDEFINITE
This choice must be made
from the Master.
21.5 c = actual or desired room temperature (choice made by Master). When you
press or the value flashes to indicate that the temperature value is the one
being adjusted.
24HR 1 = programme in use
11.59 = current time or current time alternating with outside temperature
TO CHOOSE DESIRED PROGRAM.
P r o G
24 H R 1
PRESS
THE FOLLOWING PAGE APPEARS
PRESS o
TO SELECT THE DESIRED PROGRAM
The choice of programs offered may be
set via the Master to adapt to the user's level of
experience
The complete range of programs available is:
– 24HR1...7 = 24hour programs from 1 to a maximum of 7
– 7DAY1...7 = 7day program from 1 to a maximum of 7
– P. LIM. = temporary choice of any program for limited period, for use in the event
of occasional occupation. The type & duration can be programmed as
required.
– MAN = the program is manual: the same temperature is always maintained and this
can be adjusted as required..
– FROSP. = the Frost Protection program with temperature as desired
– HEATP = sif the control is for summer, instead of FROSP will appear HEATP
– OFF = always off
= CHOICE OF PARAMETER TO SET (ashes)
= ADJUST CHOSEN PARAMETER :
The chosen parameter continues to flash for 5 seconds
after setting. To reset parameter press simultaneously
or
BACK

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D33351 - RTL 120/520 Eng. 24.06.15 AM
We reserve the right to make changes without notice
28. POWER CABLE (ASA 2418) FOR RTL 120/520 WITH 24 VOLT AC SUPPLY
The RTL 120/520 may be powered by 24 V~ instead of receiving power direct from the Master or from the auxiliary
power suppliers.
This becomes necessary when you want to use an existing cable system, susitable for the power supply of the
RTB ... zone unit, of the COSTERZONE system, which are powered by 24 V~.
The ASA 2418 twin cable permits the transfer of the COSTERZONE system to the MULTIZONE system without
having to change the cables already laid in the site.
The cabling of the RTB ... zone unit of the COSTERZONE system consists of four wires:
– 24 Volt ~ phase.
– 24 Volt ~ neutral.
– C = hot pole of the C-Bus
– 0C = cold pole of the C-Bus
These are the four cables which run from the UMT 704 Master to the RTB ... zone unit, which are powered by 24 V~
and which receive C-Bus from the Master itself..
The site is converted from COSTERZONE to MULTIZONE without changing the existing cabling, as follows:
24 Volt ~ phase
24 Volt ~ neutral
C = hot pole of C-Bus
which becomes
P+ = hot pole of P-Loc
0C = cold pole of C-Bus
which becomes
P– = cold pole of P-Loc
BLACK BROWN
BLACK RED
G = Power supply RTL ...P– = 0 V Power supply
& Bus P-Loc
ASA 2418
P– = cold pole of P-Loc P+ = hot pole of P-Loc
WARNING:
STRICTLY FOLLOW THE WIRING DIAGRAM ABOVE, ESPECIALLY WITH REGARDS TO THE A 24 Volt ~ WIRING.
TAKE CARE IN VERIFYING NEUTRAL AND PHASE IN ALL POINTS TO AVOID SHORT CIRCUITING THE 24 Volt ~ LINE.
WHEN WIRING IS EXTENDED TO MANY ZONE UNITS, THERE IS A HIGH RISK OF INADVERTEDLY CONFUSING NEUTRAL WITH
PHASE AND VICE VERSA: BEFORE POWERING UP, CHECK ALL CONNECTIONS CAREFULLY.
Amendments to data sheet
Date Revision n. Page Section Amendment description Firmware
version
Software
version
24.06.15 ED 1 , 4
5
1. BUILT IN .... 6. WIRING DIAGRAMS
9. COMMUNICATION BUS P-LOC ....
Deleted sentences
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