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The SC ACS 160-225 is a floor-standing module for the instantaneous production of domestic hot water for large appli-
cations.
The function of the module is to heat domestic hot water by exchanging energy from a buffer tank.
The advantage of using the module is to produce domestic hot water in large volumes, with a primary temperature of
48°C (with DHW 45°C).
This allows the use of several energy sources, such as solar energy, heat pumps, biomass, etc.
The module has been designed integrating the most advanced hydraulic and electronic control technologies ensuring
the production of DHW up to 220 l/min per module.
Description
1 DHW mixer in packing
2 Instruction manual
3 Circulation pump assembling instructions
4 DHW return pump assembling instructions
5 Fuse
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
centre.
SC ACS 160-225
DESCRIPTION
CONTENTS OF KIT
Q.ty
1
1
1
1
1
waste
collection
1
cod. Doc-0100463 - Rev. 1 (06/2021)
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Related Manuals for Riello SC ACS 160
Summary of Contents for Riello SC ACS 160
- Page 1 SC ACS 160-225 DESCRIPTION The SC ACS 160-225 is a floor-standing module for the instantaneous production of domestic hot water for large appli- cations. The function of the module is to heat domestic hot water by exchanging energy from a buffer tank.
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Page 2: General Safety Information And Precautions
GENERAL SAFETY INFORMATION AND PRECAUTIONS READ THIS MANUAL THOROUGHLY BEFORE PERFORMING ANY WORK ON THE PRODUCT. The manufacturer reserves the right to modify the product without notice for the purpose of introducing technical im- provements or to facilitate production, installation and positioning. The illustrations in this manual may therefore differ slightly from the actual product. - Page 3 MAIN COMPONENTS STRUTTURA 1 Cabinet in painted steel sheet, ventilation slots for internal electronic components, and inspection access on all four sides 2 AISI 316 stainless steel brazed plate heat exchanger Primary circuit 3 Filter 4 Non-return valve 5 Primary circuit mixer valve with servomotor (220 V AC, 3 positions) 6 High efficiency modulating pumps (1) and (2) installed in parallel 7 Automatic vent valve 8 Double return diverter valve...
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Page 4: Water Circuit
WATER CIRCUIT Double return variant VFS1 1 Shut-off valve 7 Flow meter with temperature sensor (S5-S6) 2 Y filter 8 Three-way diverter valve 3 Three-way mixer valve 9 Vent valve 4 Modulating pump 10 Drain valve 5 Non-return valve 11 Non-return valve (recommended, not supplied) 6 Heat exchanger... -
Page 5: Technical Specifications
Overall dimensions (b x h x p) 900 x 1000 x 500 Overall dimensions (b x h x p) 1050 x 1225 x 580 Height with external tubes SC ACS 160 - SC ACS 225 1100 SECONDARY CIRCUIT PRESSURE LOSS P1-P2 01,0... -
Page 6: Performance Charts
DHW RETURN PRESSURE LOSS P3-P2 [l/h] 1000 2000 3000 4000 5000 PERFORMANCE CHARTS SC ACS 160 4,33 4,17 4,00 3,83 3,67 3,50 3,33 3,17 3,00 2,83 2,67 2,50 2,33 2,17 2,00 1,83 1,67 1,50 1,33 1,17 1,00 0,83 0,67 0,50... - Page 7 SC ACS 225 4,33 4,17 4,00 3,83 3,67 3,50 3,33 3,17 3,00 2,83 2,67 2,50 2,33 2,17 2,00 1,83 1,67 1,50 1,33 1,17 1,00 0,83 0,67 0,50 0,33 0,17 0,00 Temperatura prelievo accumulo (°C) Temperature of water from storage cylinder (°C) NB: The proper working of the module is assured if the supply temperature of the primary circuit is at least 3°C greater than the DHW temperature set.
- Page 8 DIMENSIONS AND FITTINGS SC ACS 160-225 EAFS RP1 Primary outlet 1 (bottom of storage 1 1/2” UACS cylinder) RP2 Primary outlet 2 (middle of storage 1 1/2” cylinder) MP Primary inlet 1 1/2” RS DHW circulation inlet 1 1/4” EAFS Domestic cold 1 1/4”...
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Page 9: Wiring Diagram
WIRING DIAGRAM... -
Page 10: System Schematic
SYSTEM SCHEMATIC Single return variant Recirculation Ricircolo DHW outlet Primary Uscita ACS Mandata inlet primario Cold water inlet Double return variant Recirculation Ricircolo DHW outlet Primary Uscita ACS Mandata inlet primario Cold water inlet... -
Page 11: Control Panel
CONTROL PANEL - The controller incorporates an illuminated display with a synoptic that identifies the unit’s active functions and instant temperatures. - In the event of a malfunction in either of the DHW pumps, the unit automatically adjusts itself to deliver up to 60% of the hot water requested. -
Page 12: Preliminary Checks
INSTALLATION HANDLING The customer is responsible for providing suitable equip- ment for unloading and moving the unit, for checking the number of pieces delivered and for verifying the integrity of all material. The unit is delivered on a pallet. Use a pallet jack or forklift truck to move the unit. - Page 13 The distance of the module from wall must be at POSITIONING minimum 0,5 m. The distance of the module from the storage cylin- der must be at maximum 7/8 m. 7000 / 8000 Bear in mind the following before installing the product: - The product is designed to mix domestic hot water from a storage cylinder.
- Page 14 The connection to the sanitary water network must follow the prescriptions of the current legislation. The domestic cold water supply must be fitted with a safety valve conforming to DIN 4753 part 1. The operating pressure of this valve must be equal to the unit’s maximum operating pressure. If the pressure of the water supply reaches 10 bar, install a pressure reducer downstream from the water meter.
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Page 15: Safety Warnings
On completion of all transport or handling operations, always check the tightness of the water fitting ring nuts. Take particular care when connecting the unit to the water supply. When tightening a fitting, always hold the opposite fitting steady with a second tool to avoid damage. Connect up the pipes according to the legend on the unit itself and according to the instructions given in this manual. - Page 16 SYSTEM VARIANT WITH SINGLE RETURN TO STORAGE CYLINDER The following procedure must be completed before putting the sys- tem into service. Proceed as follows to disable the return to the middle of the storage cyl- inder. - Close cock RP2 (primary return to middle of storage cylinder); We recommend that you screw a 1 ½”...
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Page 17: Putting Into Service
PUTTING INTO SERVICE Provide electrical protections on the power supply line as per current legislation. Circuit filling and putting into service must only be done by qualified personnel. Fill and bleed the primary and secondary circuits and check for leaks before putting the unit into service. - Check that the ring nuts of all the water fittings are tight. -
Page 18: About The Controller
USE AND FUNCTIONS OF THE CONTROLLER EU-Conformity By affixing the CE mark to the unit the manufacturer declares that the LFWC conforms to the following relevant safety regulations: - EU low voltage directive 2014/35/EU - EU electromagnetic compatibility directive 2014/30/EU conforms. Conformity has been verified and the corresponding documentation and the EU declaration of conformity are kept on file by the manufacturer. -
Page 19: Installing The Temperature Sensors
5 - 100, 10 - 200 Mechanical relay R1 - R4 460VA for AC1 / 460W for AC3 0-10V/PWM output V1,V2 (0-10V/PWM) | V3,V4 (PWM), for 10 k Ω working resistance 1 kHz, level 10 V Max. cable length: Pt1000 sensor <... - Page 20 ON THE CONTROLLER CAN high CAN high + Power supply 5 S6 Storage transfer CAN low CAN low S7 Solar l/min S8 not used (optionally) Temp. °C V4 additional pump PWM signal...
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Page 21: Menu Sequence And Menu Structure
DISPLAY AND PROGRAMMING With its clear graphic and text interface, the display (1) provides intuitive guidance on the operation of the con- troller. The LED (2) lights up green when a relay is switched on. The LED (2) lights up red when operating mode ‚Off‘ is set. The LED (2) flashes quickly red when an error is present. -
Page 22: Setup Wizard
SETUP WIZARD The first time the controller is switched on, once the lan- Setup wizard guage and the clock are set, a prompt will appear asking whether or not the setup wizard is required. The wizard Do you want to run the setup can be called up again at a later time if needed, from the wizard now? special functions menu. -
Page 23: Measurement Values
MEASUREMENT VALUES Serve to display the current measured temperatures. 1.Exit Measurements If ‚error‘ appears on the display instead of the meas- 1.1.Storage ret. 19°C urement value, there may be a defective or incorrect temperature sensor. 1.2.Circulation 39°C Info STATISTICS Serve for function control and long-term monitoring of the system. -
Page 24: Operating Mode
3. OPERATING MODE Auto The automatic mode is the normal mode of the controller. 4.Exit operating mode A correct controller function under consideration of the 4.1.Automatic (selected) current temperatures and the set parameters is only pres- ent in automatic mode! After an interruption of the mains 4.2.Manual voltage, the controller automatically returns to the last op- erating mode selected. -
Page 25: Protective Functions
PROTECTIVE FUNCTIONS The 'Protective functions‘ can be used by specialists to activate and set various protective functions. Exit protections 5.1.Anti-legionella By no means does the controller replace the safety appliances on site! 5.3.Discharge protection Anti Legionella With the help of the anti legionella function (hereinafter referred to as: "AL", the system can be heated up at selected times in order to free it of legionella. - Page 26 Min. Speed The minimum speed of the pump is determined here. During the setting, the pump runs in the respective speed and the flow can be determined. The specified percentages are variables, which may deviate more or less strongly depending on the system, pump and pump level.
- Page 27 Circ. Tmin. Minimum temperature If this value is undershot and the circulation is approved or there is a request through a tapping process, the circulation pump is started. Circ. Hysteresis Switch-off hysteresis of the circulation pump. If the Circ. Tmin value is exceeded by the value set here, the circulation pump will be shut down.
- Page 28 ∆T return storage Temperature difference for the storage tank stratification via a zone valve. If the temperature in the primary return flow exceeds the corresponding storage tank temperature by the temperature difference set here, the valve switches on to stratify in the upper storage tank zone. If the temperature drops below this temperature, the valve is switched off again. When no storage sensor is connected, a temperature of 25°C is assumed.
- Page 29 ∆T Solar Switch on/switch off temperature difference for sensor X: If the temperature difference ∆T Solar between the reference sensors is exceeded and the other conditions are fulfilled, the controller will turn on the pump/valve on the corresponding relay. If the temperature difference falls to ∆T Off, the pump/valve will be turned off again.
- Page 30 For high-efficiency pumps with 0-10 V / PWM signal input, the power supply can be made via the additional func- tions "always on" or "parallel operation V1/V2" on relays. Settings of the cascade function Activation of the cascade function The controller of the cascade for fresh water systems is a special function that is activated via the hidden menu. In order to access the cascade function in the menu, press the ESC button for 10 seconds upon switching on.
- Page 31 of all controllers within the network. The total flow rate is calculated and displayed in each controller next to the icon for the valve. The sensor values S1 to S6 are exchanged through CAN. First it is verified whether a local sensor is connected and if this is the case, it will be used and its value transmitted through the CAN bus to the connected controller.
- Page 32 the time is accurately set on the controller. Please note that the clock continues to run for about 24 hours if the mains volt- age is interrupted, and afterward must be reset. Improper operation or an incorrect time may result in data being cleared, recorded incorrectly or overwritten.
- Page 33 7. MENU LOCK Secure the controller against unintentional changing and compromise of basic functions. 7.Exit menu lock Menu lock active = "On" 7.1.Menu lock Menu lock off = "Off" In addition, the "Simple" menu view can be used to hide menu items that are not necessary for the daily use of the controller after commissioning.
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Page 34: Malfunctions And Error Messages
MALFUNCTIONS MALFUNCTIONS AND ERROR MESSAGES If the controller detects a problem, the red LED flashes and a warning symbol appears on the display. If the mal- function resolves itself, the warning symbol becomes an information symbol and the red LED stops flashing. To view details of the error, press the key under the warn- ing or information symbol. -
Page 35: Maintenance
REPLACING THE CONTROLLER FUSE Replace the fuse with the one contained into the document envelope. Repairs and maintenance may only be performed by a specialist. Before working on the unit, switch off the power supply and secure it against being switched on again! Check for the absence of power! Only use the supplied spare fuse or a fuse of the same design with the following specifications: T2A... -
Page 36: Anti-Legio- Nella
DEFAULT PARAMETER SETTINGS TABLE MENU DE- DESCRIPTION SETTINGS RAN- DEFAULT DEFAULT NOTE NOTE SCRIPTION SC ACS 160 SC ACS 225 4. SETTINGS T set DHW 30 ÷ 85 °C 45 °C 45 °C T max DHW 55 ÷ 95 °C 55 °C... - Page 37 MENU DE- SETTINGS RAN- DEFAULT DEFAULT NOTE DESCRIPTION NOTE SCRIPTION SC ACS 160 SC ACS 225 Anti-legionella Anti-legionella 5.1.1 on / off function Anti-legionella 5.1.2 60-99°C 70°C 70°C Temp. Anti-legionella IF 6.10.4.1 ON 5.1.3 1-120min 15min 15min resid. time Anti-legionella 5.1.4...
- Page 38 MENU DE- DESCRIPTION SETTINGS RAN- DEFAULT DEFAULT NOTE NOTE SCRIPTION SC ACS 160 SC ACS 225 V3 speed 6.6.1 MAX speed 15-100% 100% 100% 6.6.2 MIN speed 10-95% v4 signal 6.7.1 Signal type MANUAL MANUAL 6.7.2 Signal setting Normal/Inverted INVERTED INVERTED 6.7.3...
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Page 39: Descrizione Menu
MENU DE- SETTINGS RAN- DEFAULT DEFAULT NOTE DESCRIPTION NOTE SCRIPTION SC ACS 160 SC ACS 225 6.11.10 Always on 6.11.11 Cascade 6.11.11.1 Cascade on/off 6.11.11.2 Fix base station on/off 6.11.11.3 Station ON flux 10-99 Station OFF 6.11.11.4 10-90% flux 6.11.11.5... -
Page 40: Mixing Valve
MENU DE- DESCRIPTION SETTINGS RAN- DEFAULT DEFAULT NOTE NOTE SCRIPTION SC ACS 160 SC ACS 225 6.13.9 Always on 6.13.10 Cascade MIXING VALVE 6.14 Signal V2 6.14.1 Recirculation 6.14.2 thermostat 6.14.3 Zone valve 6.14.4 Anti-legionella Errore mes- 6.14.5 sage Additional 6.14.6... - Page 41 MENU DE- SETTINGS RAN- DEFAULT DEFAULT NOTE DESCRIPTION NOTE SCRIPTION SC ACS 160 SC ACS 225 VFS1 constant 6.17.10 -100 - 100 flow rate 6.18 Commissioning yes/no 6.19 Factory setting yes/no 6.20 Time& Date 6.21 Daylight saving yes/no ECOmode 6.22...
- Page 42 CHECKS On completion of the installation, perform the checks listed in the table below. DESCRIPTION All automatic or manual filling pumps removed. Safety valve calibrated to 6 bar, and flow open. Drain pipe from safety valve routed suitably. Expansion vessel correctly located and pre-charged to 2.5 bar Non-return valves activated as gravity brakes...
- Page 44 RIELLO S.p.A. Via Ing. Pilade Riello, 7 37045 - Legnago (VR) The manufacturer strives to continuously improve all products. Appearance, dimensions, technical specifications, standard equipment and accessories are therefore liable to modification without notice.
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