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ENGLISH

SC ACS 80

The 

SC ACS 80 

is an instantaneous domestic hot water production module that uses the working principle of a stainless 

steel plates exchanger.

The setting of the domestic hot water outlet temperature (secondary side) happens with the modulation of the primary 

circuit flow rate through a variable flow pump controlled by LFWC controller (PWM control). 

The system, which works with a low primary temperature, finds a wide use in thermal solar systems and in underfloor 

heating.

3-way mixing valve: estabilishes the inlet water temperature (ideal function for the summer, in which the system exploites 

solar thermal panels)

Description 

Qty.

1  DHW mixer in packing 

1

2  Instruction manual 

1

3  Circulation pump assembling instructions 

1

4  Immersion sensors 

2

5  Fuse 1

DESCRIPTION

CONTENTS OF KIT

At the end of its life, the product 
should be not be disposed of 
as solid urban waste, but rather 
it should be handed over to a 
differentiated waste collection 
centre.

cod.  Doc-0100461 - Rev. 1 (06/2021)

Summary of Contents for 20182669

Page 1: ...low primary temperature finds a wide use in thermal solar systems and in underfloor heating 3 way mixing valve estabilishes the inlet water temperature ideal function for the summer in which the syste...

Page 2: ...roduct to the elements It is not designed for use outdoors ELECTRICAL CONNECTIONS The product must be installed and all electrical connections made by suitably qualified personnel in conformity to app...

Page 3: ...y mixing valve type TV3 DN25 with electric actuator NRYC230 6 Ball valve DN25 with nut 1 7 Red handle 8 Blue handle 9 Load drain tap 10 Manual air vent valve 3 8 11 Electronic regulator mod LFWC 12 Vo...

Page 4: ...sorbed with storage cylinder at 55 C and DHW water delivery at 10 45 C 146 kW Water draw at 10 45 C with storage cylinder at 55 C 60 l min Thermal power absorbed with storage cylinder at 60 C and DHW...

Page 5: ...HARACTERISTIC CURVES FOR PRIMARY CIRCUIT PUMPS Q m3 h 0 1 2 3 4 1 2 3 4 5 6 7 8 9 10 11 12 H m Q l s Q lgpm 0 0 2 0 4 0 6 0 8 1 0 1 2 0 4 8 12 Q m3 h 0 1 2 3 4 20 40 60 80 100 120 P 1 W 140 160 2m 4m...

Page 6: ...ONS AND FITTINGS 70 226 835 MP 80 75 100 475 100 EAFS UACS RP RS SC ACS 80 MP Primary inlet 1 F RP Primary outlet return 1 F EAFS Domestic cold water inlet 1 F UACS DHW outlet 1 F RS Recirculation uni...

Page 7: ...ump BL Neutral line N primary pump Connect to controller terminal VFS1 Main voltages 230VAC 50 60Hz Connection on the right part of the terminal board b Main side 230 VAC Low voltage max 12VAC DC Conn...

Page 8: ...bility ends with the supply of the product The product must be installed in conformity to applicable standards by suitably qualified persons employed by a company that assumes full responsibility for...

Page 9: ...ng of the product b It is advisable to install the product as near as prac tically possible to the storage cylinder in order to avoid unnecessary heat loss from the connecting pipes INSTALLATION ON TH...

Page 10: ...gs are assembled in the factory It is nevertheless advisable to check their tightness after installing the prod uct It is also necessary to test the product for water tight ness at operating pressure...

Page 11: ...the primary circuit inlet and outlet ball valves Set the controller for operation in manual mode see parameter 3 2 Switch on the primary circuit pump Open the vent valve Pump water around the circuit...

Page 12: ...rtinent EN standards and installation and operating instructions accompanying system components must also be observed Installation electrical connection setting and maintenance of the controller must...

Page 13: ...with ordinary household refuse Dispose of the unit only at appropriate collection points or ship it back to the seller or manufacturer TECHNICAL SPECIFICATIONS Electrical specifications Voltage 100 2...

Page 14: ...o be connected to the socket on the circuit board Sensor 2 Cold water If no sensor is connected a temperature of 10 C is set S5 S4 S3 S2 S1 R3 PELV R3I R2 R1 L N V1 CAN CAN VFS2 VFS1 V2 S6 Control cir...

Page 15: ...lues scroll menu up down yes no confirm cancel Info additional information Back return to previous screen ok confirm selection Confirm confirm setting Finally accessing menu 3 2 and selecting Manual m...

Page 16: ...essary for your application Free commissioning If you decide not to use the commissioning help you should make the necessary settings in the following sequence Menu 6 Special functions clock Additiona...

Page 17: ...roller Please note that the clock continues to run for about 24 hours if the mains voltage is interrupted and after that has to be reset Improper operation or an incorrect time may result in data bein...

Page 18: ...ety facilities to be provided by the customer To quit the menu press esc or select Exit settings 4 1 Tset Setpoint at VFS sensor The controller LFWC provides this hot water temperature tap temperature...

Page 19: ...ti legionella With the AL function activated the LFWC makes it pos sible to heat the storage in selectable intervals AL interval for the set residence time AL resid time starting at the set time AL st...

Page 20: ...pumps with 0 10V PWM pumps can be connected to the corresponding relay V1 R1 R2 V2 since the relays are switched on and off with the signal 6 1 1 Pump type This menu is used to set the type of pump a...

Page 21: ...ing the defined heating times heating is activated 6 5 2 4 Switch off hysteresis for storage heating The storage target temperature is calculated from Tmin or Tset storage at the given operating time...

Page 22: ...tart aid function With some solar systems especially with vacuum tube collectors it may occur that the measurement value acquisition at the collector sensor occurs too slowly or too inaccurately becau...

Page 23: ...6 Pmax Max pressure If the pressure exceeds this value an error message is displayed and the LED links red 6 9 Sensor calibration Deviations in the temperature values displayed for example due to cabl...

Page 24: ...e other menus select Menu lock ON To enable the menus again select Menu lock OFF 7 2 Expert mode This menu is used to switch between expert mode in which all settings are available and simple mode in...

Page 25: ...ialist Before working on the unit switch off the power supply and secure it against being switched on again Check for the absence of power b Only use the supplied spare fuse or a fuse of the same desi...

Page 26: ...imary de livery from 30 to 80 C 48 C 4 8 2 Max primary delivery from 30 to 80 C 65 C 4 8 3 Rotation time from 1 to 3 se conds 1 sec 4 8 4 Pause factor from 0 1 to 4 seconds 1 sec 4 8 5 Increase from 0...

Page 27: ...ulation pump 6 3 1 Pump type 0 10V PWM PWMs 6 3 2 Pump Solar Recirculation 6 3 3 Output signal normal inverted Normal 6 3 4 PWM off 0 15 2 6 3 5 PWM on 2 50 13 6 3 6 PWM max 9 100 93 6 4 V2 Pump speed...

Page 28: ...llo 7 37045 Legnago VR www riello com The manufacturer strives to continuously improve all products Appearance dimensions technical speci cations standard equipment and accessories are therefore liabl...

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