Riello SUN 1 PLUS 2 RS User manual

cod. 20100537 rev. 2 09/2015
SUN 1 PLUS 2 RS
EN INSTALLATION INSTRUCTIONS

2
RANGE
MODEL CODE
SUN 1 PLUS 2 RS 20100413
ACCESSORIES
For a complete list of accessories and details of their compatibil-
ity, refer to the Catalogue.
ENGLISH
Dear Customer,
Thank you for choosing a Rdifferential controller. You have
purchased a modern, quality product that is designed to give
dependable and safe service and to provide comfort in the
home for many years to come. Arrange for your Rdifferential
controller to be serviced regularly by an authorised Rservice
centre. Their personnel are specially trained to keep your differ-
ential controller efcient and cheap to run. Rservice centres
also stock any original spare parts that might be required.
This manual contains important instructions and precautions
that must be observed to ensure the trouble-free installation
and efcient functioning of your Rdifferential controller.
Please accept our renewed thanks for your purchase,
Riello S.p.A.
CONFORMITY
SUN 1 PLUS 2 RS differential controllers conform to:
−Standards EN 55014-1-2, EN 60730-1-2-9, EN 60335-1
−Low Voltage Directive 2006/95/EC
−Electromagnetic Compatibility Directive 2004/108/EC
−RoHS II, 2011/65/EC.
9 This product must only be used for the purpose for which it
is designed and made, as specied by R. Rdeclines
all responsibility, contractual or other, for damage to prop-
erty or injury to persons or animals caused by improper in-
stallation, adjustment, maintenance or use.

3
This manual, Code 20100537 - Rev. 2 (09/2015)
comprises 40 pages.
CONTENTS
The following symbols are used in this manual:
9 CAUTION! = Identies actions that require caution and
adequate preparation.
0 STOP! = Identies actions that you MUST NOT do.
This manual, Code
- Rev.
comprises
pages.
1 GENERAL SAFETY INFORMATION ....................4
2 PRECAUTIONS ......................................4
3 DESCRIPTION OF THE APPLIANCE ...................5
4 DESCRIPTION OF FUNCTIONS .......................5
5 NR. DISPLAYED......................................5
6 PARAMETER AREA ..................................5
7 SYMBOLS AREA.....................................6
8 SYSTEM LAYOUT SCHEMATIC .......................6
9 FLASHING CODES ...................................7
9.1 Technical specications .........................7
10 WIRING DIAGRAM ...................................7
11 UNPACKING THE PRODUCT..........................7
12 DIMENSIONS ........................................8
13 ASSEMBLY ..........................................8
14 ELECTRICAL CONNECTIONS.........................9
15 PUTTING INTO SERVICE ............................10
16 OVERVIEW OF SYSTEM LAYOUTS ...................12
17 OVERVIEW OF PARAMETERS .......................12
18 VIEW-ONLY PARAMETERS ..........................15
18.1 Drainback periods display ...................... 15
18.2 Collector temperature display.................... 15
18.3 Storage cylinder temperature display .............. 15
18.4 Sensor S3-S4-VFD temperature display............. 15
18.5 Flow/return temperature display ................. 16
18.6 Flow rate display ............................. 16
18.7 Current pump speed display .................... 16
18.8 Operating hours counter - thermal energy.......... 16
18.9 Thermal disinfection time remaining display .........17
18.10 Thermal disinfection activation time display .........17
19 CONTROL PARAMETERS ...........................18
19.1 System layout selection ........................ 18
19.2 ∆T settings .................................. 18
19.3 Pump control ................................ 18
19.4 Maximum storage cylinder temperature............ 19
19.5 Option: storage cylinder safety deactivation ......... 19
19.6 Collector temperature limit - Collector safety
deactivation................................. 19
19.7 System cooling function........................ 19
19.8 Collector cooling..............................20
19.9 Option: Collector minimum limitation .............20
19.10 Option: frost protection function ................. 21
19.11 Storage cylinder cooling function ................. 21
19.12 Tube collector option .......................... 22
19.13 Thermostat function...........................23
19.14 Anti-legionella function........................ 23
19.15 Option: monitoring period ......................24
19.16 Option: disinfection duration ....................24
19.17 Option: disinfection temperature .................24
19.18 Option: wait time.............................24
19.19 Option: remaining monitoring time ...............25
19.20 Minimum speed..............................25
19.21 Grundfos Direct Sensor™ activation ...............25
19.22 Thermal energy metering .......................25
19.23 Thermal energy metering with xed ow rate .......25
19.24 Thermal energy metering with Grundfos Direct Sensor™
sensor VFD ..................................26
19.25 Assignment of thermal energy metering sensors .....26
19.26 Drainback function ...........................26
19.27 Period – activation condition.................... 27
19.28 Filling time.................................. 27
19.29 Stabilisation................................. 27
19.30 Booster function ............................. 27
19.31 Functioning mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
19.32 Language ...................................28
19.33 Unit .......................................28
19.34 Reset ......................................28
19.35 Warning question ............................28
20 INSTALLATION DIAGRAMS ..........................29
21 TROUBLESHOOTING ...............................37

4
1 GENERAL SAFETY INFORMATION
9 As soon as you open the packaging, check immediately that
the contents are all present and undamaged. Contact the
Rreseller from whom you purchased the product if you
notice any problems.
9 This product must be installed by a legally qualied heat-
ing engineer. On completion of the installation, the install-
er must issue the owner with a declaration of conformity
conrming that the installation has been completed to the
highest standards in compliance with the instructions pro-
vided by Rin this instruction manual, and that it con-
forms to all applicable laws and standards.
9 This product must only be used for the purpose for which it
is designed and made, as specied by R. Rdeclines
all responsibility, contractual or other, for damage to prop-
erty or injury to persons or animals caused by improper in-
stallation, adjustment, maintenance or use.
9 This manual is an integral part of the equipment and there-
fore must be stored carefully and must ALWAYS accompany
the differential controller even if it is sold to another Owner
or User or transferred to another plant. If it is damaged or
lost, request another copy from your local Technical Assis-
tance Service R.
9 This control panel is designed and made for use with boilers
generating hot water up to 110°C, and must be used exclu-
sively for this purpose and within its specied performance
limits.
2 PRECAUTIONS
0 Never clean the boiler without rst disconnecting it from the
mains electricity supply by turning the mains power switch
and the control panel switch OFF.
0 Do not tamper with or adjust the safety or control devices
without prior authorisation and instructions from the man-
ufacturer.
0 Never pull, disconnect, or twist the electrical cables coming
from the appliance even if it is disconnected from the mains
electricity supply.
0 Dispose of packaging materials in compliance with appli-
cable standards and legislation governing the disposal of
urban, domestic and industrial waste.
0 Never switch the control panel on even for a short period if
the safety devices are not functioning correctly or have been
tampered with.
0 All maintenance and repairs must be carried out by a legally
qualied heating engineer.
0 Do not use water to extinguish re in the control panel.
Switch power OFF at the mains power switch to isolate the
control panel electrically rst. Then use a class E re extin-
guisher (marked “SUITABLE FOR LIVE ELECTRICAL ITEMS”) to ex-
tinguish the ames.

5
3 DESCRIPTION OF THE APPLIANCE
The SUN 1 PLUS 2 RS differential controller is designed to control a
domestic hot water system with an integrated solar water heat-
ing system. The supplementary function for metering thermal
energy production can also be selected.
The controller is equipped with 4 inputs for temperature sen-
sors: 1 VFD sensor for measuring temperature and ow rate, 2
electromechanical relay outputs for switching the pump on and
off and 1 PWM output for modulating pump control.
A back-lit display permits easy use of controller functions, and
also displays a schematic of the active system layout formed by
two-colour LEDs.
4 DESCRIPTION OF FUNCTIONS
The controller is operated by means of 3 buttons located under
the back-lit display.
Button 1 (+) lets you scroll forward through displayed parame-
ters (see the “View-only parameters” section) or increment the
setpoint of control parameters (see the “Control parameters”
section).
Button 2 (-) lets you scroll back through displayed parameters,
access the parameter setting/viewing area, and decrement con-
trol parameter setpoints.
Button 3 (OK/set) lets you edit control parameters and conrm
new setpoint values.
Nr. displayed
Proceed as follows to display the controller’s view-only param-
eters.
−Briey press key 1 (+) or 2 (-). The rst view-only param-
eter for the active system layout appears on the screen
−scroll through the parameters with keys 2 (-) and 1 (+)
−each parameter shown is accompanied by its current
reading.
For a complete list of view-only parameters, see the relevant
section in the Technical Service part of this manual.
1
3
2
5 NR. DISPLAYED
The screen is made up of 3 areas:
−parameter area
−symbols area
−the system layout area.
6 PARAMETER AREA
The parameter area consists of two lines of characters.
The top line is an alphanumeric eld of characters of 16 seg-
ments each. This line displays the code identifying the current
parameter (see the list of parameters).
The bottom line is made up of digits of 7 segments and displays
the current parameter value.
Temperatures are displayed in °C or °F . Temperature differentials
are displayed °K or °Ra.

6
7 SYMBOLS AREA
The symbols area consists of two lines of symbols identifying
system state.
State Normal Flashing
Relay 1 activated
Relay 2 activated
Maximum storage cylinder tem-
perature exceeded
Storage cylinder safety deactiva-
tion activated +
Collector safety deactivation
activated
Collector cooling activated
System cooling activated
Storage cylinder cooling acti-
vated +
Holiday cooling activated
Holiday cooling activated +
Collector minimum temperature
limit activated
Frost protection function acti-
vated
Frost protection function active
Manual mode, relay 1 ON +
Manual mode, relay 2 ON +
Manual mode, relay 1 / 2 OFF
Sensor fault
8 SYSTEM LAYOUT SCHEMATIC
The system layout area displays a schematic of the active system
as set in the Arr parameter. The schematic is made up of a num-
ber of symbols, which can be lit, ashing or off according to the
current system state.
21
976 8
3
10
11
5
4
1 Sensors
2 Storage cylinder top sensor
3 Collector 1
4 Valve
5 Pumps
6 Storage cylinder heat exchanger
7 Cylinder body
8 Storage cylinder bottom sensor
9 Storage cylinder 2 or supplementary heating (with supple-
mentary symbol)
10 Supplementary symbol for burner functioning
11 Supplementary heating with burner symbol

7
9 FLASHING CODES
Flashing schematic symbols
Pumps The pump symbol ashes when the pump is running
Sensors The sensor symbol ashes when the associated view-only parameter is selected
Sensors One or more sensor symbols ash very rapidly if a sensor fault is detected
Supplementary heating The burner symbol ashes when active
9.1 Technical specications
Description SUN 1 PLUS 2 RS
Power supply 100-240V (50-60Hz) V - Hz
Fuse T2 A
Maximum permitted pulsed overvoltage 2,5 kV
R1-R2 relay contacts 2 (1) A
Index of protection according to EN60529 IP20
Dimensions 172 x 110 x 46 mm
Room temperature range 0-40 °C
Inputs 4 x PT1000 temperature sensors
1 x VFD sensor
Data communication VBus®
Vbus current level 35 mA
PWM frequency 512 Hz
PWM voltage 10,5 V
10 WIRING DIAGRAM
Fuse
VBus®Grid terminals
Consumer terminalsSensor terminals Safety wire terminals
1 (1) A 240 V~
1 (1) A 240 V~
L
N
R1
R2
R1
N
91 02
18
51 61 71
21 31 411 2
N R2
IP 20
T2A
100 ... 240 V~
50-60 Hz
Temp. Sensor Pt1000
suBV4S3S1S 2S
PWM
VFD
Made in Germany
345 6 7 8 9 10
11 UNPACKING THE PRODUCT
The SUN 1 PLUS 2 RS controller comes in a cardboard box that also contains the following accessories:
−2 x PT1000 FKP6 high temperature sensors, cable length = 1.5 m
−2 x PT1000 FRP6 storage cylinder sensors, cable length = 2.5 m
−1 x PWM adapter cable
−1 x accessories bag containing:
2 x screws and plugs for wall mounting
4 x cable clamps with xing screws
−1 x T2 A fuse (inside appliance)
−instruction manual.

8
12 DIMENSIONS
110
30
62
172
46
13 ASSEMBLY
9 Always make sure that power to the controller is completely
disconnected before removing the cover.
−Unscrew the cross-head screw holding the cover in place.
Pull the cover outwards and downwards to remove it
from the controller.
Cross-head
screw
−Mark the top xing point on the mounting plate or wall.
Drill the hole and t the plug and xing screw supplied
with the controller.
Display
Cable conduits
with strain relief
Cover
Button
Fuse T2A
−Fit the controller casing over the top xing point and
mark the position of the bottom xing hole (distance be-
tween holes 130 mm).
−Drill the hole and t the bottom wall plug.

9
−Hang the controller over the top xing point and secure
it to the wall at the bottom using the wall plug and xing
screw provided.
130
Suspension
point
Fixing hole
−Make all necessary electrical connections as instructed in
the next section, respecting the markings of the termi-
nals.
−Fit the cover over the top of the controller and x it in
place with the cross-head screw.
14 ELECTRICAL CONNECTIONS
POWER SUPPLY
The controller must be connected to a power supply of the fol-
lowing voltage and frequency: 100-240 V and 50-60 Hz.
Fit a breaker-disconnector in the power supply line to discon-
nect the controller for maintenance.
Solar controller power connections:
20 Live terminal for power cable
19 Neutral terminal for power cable
12 Earth (ground) terminal for power cable
Relay outputs for device control
Relays R1-R2 function like electromechanical relays for switching
on and off devices such as pumps, valve servomotors, etc.. Relay
R1 is an electromechanical relay
Water connections:
R1
18 live wire / control switch for switching pump on/off
17 neutral wire
13 earth (ground) wire
Water connections:
R2
16 live wire / control switch for switching pump on/off
15 neutral wire
14 earth (ground) wire
1 (1) A 240 V~
1 (1) A 240 V~
R1
R2
L
R1 N
N
91 02
18
51 61 7121 31 41
N R2
IP 20
T2A
100 ... 240 V~
50-60 Hz
Inputs for temperature sensors
The controller has 4 inputs, each identied by a code:
S1-S2-S3-S4 are the cable terminals for the PT1000 temperature
sensors used in the selected system layout. Cable polarity is not
important.
1-2 sensor 1 (e.g. collector 1 temperature sensor)
3-4 sensor 2 (e.g. storage cylinder 1 bottom temperature)
5-6 sensor 3 (e.g. storage cylinder 1 top temperature sensor)
7-8 sensor 4 (e.g. collector 1 return temperature sensor)
1 (1) A 240 V~
1 (1) A 240 V~
R1
R2
1 2
Temp. Sensor Pt1000
suBV4S3S1S 2S
PWM
VFD
Made in Germany
345 6 7 8 9 10
Sensor terminals S1...S4
Connected PT 1000 temperature sensors can be checked with a
multimeter-tester. Their temperatures can be compared with
the resistance values given below.
°C Ω°C Ω
-10 961 55 1213
-5 980 60 1235
01000 65 1252
51019 70 1271
10 1039 75 1290
15 1058 80 1309
20 1078 85 1328
25 1097 90 1347
30 1117 95 1366
35 1136 100 1385
40 1155 105 1404
45 1175 110 1423
50 1194 115 1442
Resistance values for Pt1000 sensors

10
Data transmission / Bus
The controller has two terminals for data transmission over a
bus. Polarity is not important.
Data transmission protocol is VBus®, which permits the trans-
mission of data to external devices such as:
−An external WMZ calorimeter for thermal energy metering
−External displays
−Datalogger
−Remote control.
1 (1) A 240 V~
1 (1) A 240 V~
R1
R2
1 2
Temp. Sensor Pt1000
suBV4S3S1S 2S
PWM
VFD
Made in Germany
345 6 7 8 9 10
Vbus
Grundfos Direct™ sensors (VFD)
The controller has 1 input for Grundfos Direct™ sensors (VFD) used
to measure ow rate and temperature. The connection uses the
VFD terminal (bottom left).
PWM output
The speed of the HE pump is controlled by a PWM signal.
Pumps must be connected to the controller’s PWM outputs for
connection to the relays. The pump must be connected to the
relay and to the controller’s PWM output. The HE pump receives
power when the relay is activated and deactivated.
The two left pins of the PWM socket are used as control outputs
for a pump with a PWM control input. The two right pins are not
used.
PWM
1 2
1 PWM output 1, control signal
2 1st PWM output, GND
15 PUTTING INTO SERVICE
Electrical power connection
The controller enters the initialisation phase.
When the controller is put into service for the rst time, and also
after a reset, the startup menu is displayed. The startup menu
guides users through the most important control parameters for
system functioning.
Programming
−Press button 3 to select the control parameter. The SET
symbol ashes.
−Press buttons 1 and 2 to set the value.
−Press button 3 again to conrm the setting. The SET sym-
bol appears xed again.
−Press button 1 or 2 to switch to the previous or next con-
trol parameter.
Language
Set the menu language in this parameter.
Setting range: DE, EN, FR, ES, IT.
Default settings: DE.
Unit
Set the unit of measurement in which temperature and temper-
ature differential must be displayed.
Setting range: °F, °C.
Default settings: °C.
Time
Set the current time.
Set the hour rst and then the minutes.
System layout
Set the required system layout.
Setting range: 1 - 3.
Default settings: 1.