Baxi Potterton Sirius SAT RA User manual

Working towards
a cleaner future
Sirius SAT
Built-in User Module Fitted for a Domestic
Hot Water Storage Boiler
RA – RA2Z
Installation and Operating Manual
August 2010
heating specialists

2912.807.1 - GB
INSTALLATION AND OPERATING MANUAL
TO THE OWNER OF THIS POTTERTON COMMERCIAL APPLIANCE
We are condent your new POTTERTON COMMERCIAL appliance will meet all your requirements.
All POTTERTON COMMERCIAL products have been designed to give you what you are looking for: good
performance combined with simple and rational use.
Please do not put away this booklet without reading it rst as it contains some useful information which will
help you to operate your appliance correctly and efciently.
Attention: Do not leave any packaging (plastic bags, polystyrene, etc.) within reach of children, as it is a po-
tential source of danger.

3912.807.1 - GB
INSTALLATION AND OPERATING MANUAL
1. Description 4
2. Instructions prior to installation 4
INSTALLATION INSTRUCTIONS: HYDRAULIC CONNECTIONS
3. Centralised system requirements 5
4. Mounting the template casing 9
5. Mounting the appliance 10
6. Connecting the storage boiler 11
7. Output/pump head performance 13
8. Domestic hot water production 13
9. Domestic water meter 14
INSTALLATION INSTRUCTIONS: ELECTRICAL CONNECTIONS
10. Electrical connections 15
11. Wiring diagrams 16
12. Electrical connections to the storage boiler 18
13. Connecting the ambient thermostat 21
14. Connecting the oor overheating thermostat 22
15. Installing and connecting the external probe 23
16. Connecting the ECO CRONO climate controller 24
17. Adjusting the electronic board 24
INSTALLATION INSTRUCTIONS: HEAT METERING
18. Heat metering 28
19. Automatic measurement system via radio 29
START-UP AND OPERATING INSTRUCTIONS
20. Filling the system 33
21. Air vent and pump release 33
22. Start-up 34
23. Electronic board signals 35
MAINTENANCE INSTRUCTIONS
24. Cleaning the central heating inlet lter 37
25. Circuit diagram 38
26. Disposal 40
27. Technical specications 40
CONTENTS

4912.807.1 - GB
INSTALLATION AND OPERATING MANUAL
The SIRIUS SAT user modules make it possible to independently manage heating requirements and the production of
domestic hot water with storage in centralised systems, meter the heat distributed to each unit (at or independently
managed area) and transmit heat consumption data via radio.
The following notes and instructions are addressed to tters to allow them to carry out trouble-free installation.
The operating instructions are contained in the “Start-up and operating instructions” section of this manual.
ATTENTION:
- Do not leave any packaging (plastic bags, polystyrene, etc.) within the reach of children as they are a potential
source of danger.
- The appliance must be housed in the template casing supplied in a separate pack.
- Flush the Domestic Hot Water circuit prior to use.
INTRODUCTION
The SIRIUS SAT user modules are available in 2 versions:
SIRIUS SAT Can be connected
to storage boiler
dual zone Circulation pump Casing kit
SIRIUS SAT RA ●-●L = 600
SIRIUS SAT RA2Z ●●●
L = 800
These models are tted with circulation pumps which release them from the head generated by the column pump inde-
pendently feeding the internal heating circuit and the storage boiler coil circuit. They can also be connected to an external
storage boiler for the production of domestic hot water.
The dual-zone models can separately manage two heating zones at different temperatures and are ideal for combined
central heating systems (underoor radiant panels at a low temperature with radiators at a high temperature).
1. DESCRIPTION
These appliances must be inserted in a centralised heating system and connected to a storage boiler, especially designed
for this purpose, consistently with their performance levels and power outputs.
The tter must be legally qualied to install heating appliances.
Initial start-up must be performed by a POTTERTON COMMERCIAL-authorised Service Engineer, as indicated on the
attached sheet.
Failure to observe the above will render the guarantee null and void.
Do the following before connecting the appliance:
r$BSFGVMMZáVTIBMMUIFTZTUFNQJQFTJOPSEFSUPSFNPWFBOZSFTJEVBMUISFBEDVUUJOHTXBSGTPMEFSBOETPMWFOUTJOUIFvarious heating circuit components.
2. INSTRUCTIONS PRIOR TO INSTALLATION

5912.807.1 - GB
INSTALLATION AND OPERATING MANUAL
Some general indications concerning the installation of the centralised heating system are shown below. For the-
se types of plants, a cutting-edge bespoke design compliant with current legislation is always necessary in order
to ensure ideal conditions of comfort, save energy and reduce the environmental impact.
Install the boilers in a cascade arrangement (preferably condensation boilers with low pollutant emissions) of a suitable
size to optimise plant performance according to seasonal loads, user demand and Domestic Hot Water demand peaks.
The maximum installed power must consider a simultaneous use factor so as not to oversize the generator and conse-
quently reduce operating efciency.
The centralised plant must service the various oors of the building by means of columns positioned in the stairwells or
in utility rooms which should preferably be inspectable.
A hydraulic separator should always be tted downline from the heat generator as this separates circulation in the gene-
rator from circulation in the columns.
The centralised plant must have the following features:
r"VUPNBUJDàMMJOHr&YQBOTJPOTZTUFNTJ[FEBDDPSEJOHUPUPUBMQMBOUDBQBDJUZr0WFSQSFTTVSFTBGFUZWBMWFTJ[FEBDDPSEJOHUPDVSSFOUMFHJTMBUJPOEach suitably sized column must be tted with a circulator (preferably at variable speed depending on the demand of the
modules), on/off valves and a dynamic balancing valve. Automatic air vents must be installed at the top of the columns.
The inlet sections must have the same pressure drop in order to allow the system to balance feed to all the user systems.
The recommended typology is three columns with a reverse return line.
Modules with Domestic Hot Water production require an appropriate centralised plant capacity so as to produce a thermal
mass that can limit the instantaneous operation of the generator (column oversizing).
THE COLUMNS AND MANIFOLDS MUST BE WELL LAGGED.
Make sure that the circuit pressure drops downline from the module (R = 0.3 KPa/m per linear metre + local leaks) are
compatible with the pump supplied together with the module. In this case, the column pump must offset the circuit pres-
sure drops upline from the module (a residue head is acceptable).
SIRIUS SAT user modules are tted with an automatic by-pass valve which opens the circulation circuit when the pressure
drops exceed 60 kPa (inlet valve closed).
3. CENTRALISED SYSTEM REQUIREMENTS
INSTALLATION INSTRUCTIONS:
HYDRAULIC CONNECTIONS

6912.807.1 - GB
INSTALLATION AND OPERATING MANUAL
0904_2304 / CR_0083
Figure 1a: System diagram
SIRIUS SAT
SIRIUS SAT
SIRIUS SAT
SIRIUS SAT B 60
SIRIUS SAT B 60
SIRIUS SAT B 60
HEATING
HEATING
HEATING
DOMESTIC
HOT WATER
DOMESTIC
HOT WATER
DOMESTIC
HOT WATER
HEATING UNIT WITH BOILERS
IN CASCADE ARRANGEMENT

7912.807.1 - GB
INSTALLATION AND OPERATING MANUAL
0905_0501 / CR_0013
Figure 1b: Floor arrangement diagram
The indicative diagram in gure 1b only illustrates the feed pipes of the individual user modules.
The heating plant inside the zone controlled by the module must be realised by feeding the heating elements according
to normal methods.
The storage boiler for the production of domestic hot water must be installed inside the home (or zone) service by the
module.
A stub of the mains water supply must be connected to the domestic hot water inlet connector of the storage boiler. The
storage boiler hot water outlet must feed all the user hot water take-off points.
SIRIUS SAT SIRIUS SAT SIRIUS SAT
HOME A HOME B HOME C
- Water temperature range in centralised plant: 60 - 75 °c
- Maximum water pressure in centralised plant: 4 bar
- Module feed flow rate (nominal): 700 ÷ 1500 l/h
- Maximum recommended speed of heat transfer fluid: 1 ÷ 1.5 m/s
- Pressure drop in module 20 KPa at 700 l/h
Some purely indicative general sizing data is shown below:
TABLE: HEAT DEMAND – HEATED AREA
Area to heat
(m2)
Heat demand (*)
with F1 = 20 W/m3
(kW)
Heat demand (*)
with F2 = 30 W/m3
(kW)
Heat demand (*)
with F3 = 45 W/m3
(kW)
60 3,6 5,4 8,1
70 4,2 6,3 9,5
80 4,8 7,2 10,8
90 5,4 8,1 12,2
100 6,0 9 13,5
110 6,6 9,9 14,9
120 7,2 10,8 16,2
130 7,8 11,7 17,6
140 8,4 12,6 18,9
150 9,0 13,5 20,3
(*) Volumetric heat load “F”: 20 - 30 - 45 W/m3with ∆t = 25 K;
height of volume to be heated = 3 m
∆t = internal and external temperature difference (internal T = 20 °C, external = - 5°C)
F1 = 20 W/m3buildings with an excellent level of insulation
F2 = 30 W/m3buildings with an good level of insulation
F3 = 45 W/m3buildings with an low level of insulation
3.1 GENERAL SIZING DATA

8912.807.1 - GB
INSTALLATION AND OPERATING MANUAL
TABLE: HEAT DEMAND – FLOW OF WATER IN HEATING CIRCUIT
DOMESTIC HOT WATER TAKE-OFF FLOW
Rated heat power for
DHW system
(kW)
Flow rate of Heating
circuit with ∆T1 = 15 K
(l/h)
Flow rate of Heating
circuit with ∆T1 = 20 K
(l/h)
Flow rate of Heating
circuit with ∆T2 = 35 K
(l/min)
7 (R) 401 301 2,9
8 (R) 459 344 3,3
9 (R) 516 387 3,7
10 (R) 573 430 4,1
11 (R) 631 473 4,5
12 (R) 688 516 4,9
13 (R) 745 559 5,3
14 (R) 803 602 5,7
15 (RS) 860 645 6,1
16 (RS) 917 688 6,6
17 (RS) 975 731 7,0
18 (RS) 1032 774 7,4
19 (RS) 1089 817 7,8
20 (RS) 1147 860 8,2
21 (S) 1204 903 8,6
22 (S) 1261 946 9,0
23 (S) 1319 989 9,4
24 (S) 1376 1032 9,8
25 (S) 1433 1075 10,2
26 (S) 1491 1118 10,6
27 (S) 1548 1161 11,1
28 (S) 1605 1204 11,5
29 (S) 1663 1247 11,9
30 (S) 1720 1290 12,3
∆T1 = Difference between User Module Delivery – Return Temperature
∆T2 = Difference between hot water outlet – cold water inlet temperature
R = heating
S = DHW

9912.807.1 - GB
INSTALLATION AND OPERATING MANUAL
0607_0201 / CR_0029
Figure 2: casing/template
CASING/TEMPLATE MODEL WIDTH SIRIUS SAT MODELS
SINGLE-ZONE SIRIUS SAT KIT L = 600 mm RA
DUAL-ZONE SIRIUS SAT KIT L = 800 mm RA2Z
Install SIRIUS SAT model inside the casing/template supplied in a separate pack.
Make sure the template casing model is correct (L= 600 or L=800 mm).
Fit the template/casing in a niche in the wall made for this purpose (dimensions indicated in gures 2 and 3) and secure it
with the relative lateral bent pins. Make sure the installation allows easy access for maintenance.
Remove the door and white frame and put back after installation (make sure the casing accessories also include the key
for opening the door).
The frame can be depth-adjusted by using the 4 buttery nuts located in the side guides. It is therefore possible to t the
frame ush against the plaster and remove it when painting the wall.
Assemble the system starting from the position of the water connectors on the lower crossbar of the template (recessed
into the casing by 30 cm).
Install the casing in the stairwell outside the apartment to heat.
4. MOUNTING THE TEMPLATE CASING
SIRIUS SAT
SINGLE-ZONE CASING
SIRIUS SAT
DUAL-ZONE CASING
L = 600
H = 650
P = 150
L = 800
H = 750
P = 150

10 912.807.1 - GB
INSTALLATION AND OPERATING MANUAL
0904_2306 / CR_0093
Figure 3 A: connectors and sizes of SIRIUS SAT RA
After completing the masonry work, hook the SIRIUS SAT module onto the casing/template and make the hydraulic con-
nections using the supplied telescopic connections (see gure 3).
Before xing the module, drill holes in the rear wall for the Ø 10mm expansion grips (use the holes in the casing/template
as a guide). Then secure the module with the supplied screws.
5. MOUNTING THE APPLIANCE
Key
CONNECTIONS TO CENTRALISED PLANT
IP: primary inlet from centralised plant G 3 ⁄ 4” M
UP: primary outlet from centralised plant G 3 ⁄ 4” M
HEATING PLANT CONNECTIONS FOR SINGLE-ZONE MODELS
MR: G 3/4” M heating plant delivery
RR: G 3/4” M heating plant return
HEATING PLANT CONNECTIONS FOR DUAL-ZONE MODELS
MRAT: high temperature plant delivery G 3 ⁄ 4” M (Models RA2Z)
MRBT: low temperature plant delivery G 3 ⁄ 4” M (Models RA2Z)
RRAT: high temperature plant return G 3 ⁄ 4” M (Models RA2Z)
RRBT: low temperature plant return G 3 ⁄ 4” M (Models RA2Z)
CONNECTIONS TO STORAGE BOILER COIL CIRCUIT
USB: Storage boiler coil outlet G 3 ⁄ 4 ” M
ISB: Storage boiler coil inlet G 3 ⁄ 4 ” M
DOMESTIC WATER METER CONNECTIONS
ESC1 (*): domestic water inlet to meter G 3/4” M
ESC2 (*): domestic water outlet from meter G3/4’’ M
Figure 3 B: Connectors and sizes of SIRIUS SAT RA2Z
0904_2307 / CR_0094
fixing slots
D Casing 150
seats for screws
seats for screws
Supplied connector 30
Supplied connector 30
fixing slots
D Casing 150
H Casing 750
H Casing 650
L Casing 600
L Casing 800

11 912.807.1 - GB
INSTALLATION AND OPERATING MANUAL
These models can be connected to an external storage boiler tted with a primary exchanger coil.
The storage boiler must be located inside the home (or zone) served by the module in order to limit the connection di-
stance.
The recommended characteristics for correct application are:
- coil piping diameter: 26 mm
- Heat exchange power: 25 ÷ 30 kW with delivery temperature 75 °C
- capacity: 40 ÷ 120 litres
- Temperature probe trap: > 7 mm
A 60-litre stainless steel wall-hung storage boiler is available as an accessory for this application (SIRIUS SAT b60).
Make the hydraulic connections as shown in gure 4.
Connect the ISB (G ¾”) connector on the module to the inlet of the storage boiler coil
Connect the USB (G ¾”) connector on the module to the outlet of the storage boiler coil
Make sure that the pressure drops in the coil circuit (including the connection parts) are compatible with the ow – pump
head curve in gure 5.
To ensure correct performance, do not decrease below 700 l/h.
Items in the SIRIUS SAT user module pack
r4DSFXTBOEFYQBOTJPOHSJQTNNr5BQ(cuVTFSNPEVMFJOMFUr5BQ(cuSFUVSOUPDFOUSBMJTFEQMBOUr5BQ(cuIFBUJOHQMBOUEFMJWFSZGPSEVBM[POFNPEFMTr5BQ(cuIFBUJOHQMBOUSFUVSOGPSEVBM[POFNPEFMTr5BQ(cuTUPSBHFCPJMFSDPJMPVUMFUr5BQ(cuTUPSBHFCPJMFSDPJMJOMFUr(BTLFUTr5FMFTDPQJDKPJOUT
6. CONNECTING THE STORAGE BOILER

12 912.807.1 - GB
INSTALLATION AND OPERATING MANUAL
Figure 4: diagram of hydraulic connections to storage boiler
0904_2401 / CR_0099
SIRIUS SAT
SIRIUS SAT B 60
ISB : STORAGE BOILER COIL INLET
USB : STORAGE BOILER COIL OUTLET
VS : SAFETY VALVE
R : RECIRCULATOR

13 912.807.1 - GB
INSTALLATION AND OPERATING MANUAL
The production of domestic hot water depends on the performance of the storage boiler (heat exchange surface of coil
and capacity), the length of the connection and the operating temperature of the central heating system.
A heat exchange surface of 35 kW (with system water at 75°C) offers suitable domestic hot water performance also with
system water at 65 °C.
Table: Domestic hot water production according to inlet temperature
Temperature of water
in centralised plant circuit
(°C)
Heat exchange capacity
(kW)
Domestic hot water flow
with ∆Ts = 35 K
(l/min)
75 35 14,3
70 31 12,7
65 28 11,4
60 26 10,6
∆TS = temperature difference between hot water outlet and cold water inlet
Temperatures greater than 75 °C are not recommended in order to prevent damaging scale deposits that can clog the coil,
reduce performance and shorten maintenance intervals.
8. DOMESTIC HOT WATER PRODUCTION
These models are tted with a circulation pump.
This silent-running high-head pump is suitable for use on any type of heating system.
The pump, mounted inside the appliance, is tted out for operation at maximum speed (III). Speed I should not be used
as ow rate/head performance does not satisfy normal operating conditions. make sure the circuit pressure drops down-
line from the module are compatible with the supplied pump. In this case, the column pump must only offset the circuit
pressure losses upline from the module (a residue head is acceptable).
The circulating ow rate value is shown on the heat meter display (see §18).
7. PUMP CAPACITY/ HEAD
Figure 5: Flow rate – Pump head curves
0904_2402
HEATING CIRCUIT / COIL CIRCUIT PUMP HEAD
WATER FLOW (l/h)
HEAD (KPa)
SPEED I
SPEED II
SPEED III

14 912.807.1 - GB
INSTALLATION AND OPERATING MANUAL
0707_2301 / CR_0095
Figura 6: Figure 6: domestic water meter
Domestic water metering inlet: hydraulic connector ESC1 (G 3/4”)
Domestic water metering outlet: hydraulic connector USC (G 3/4”)
(The USC connector is called ESC2 in the template casing)
A meter kit for measuring water consumption is available as an accessory.
t%PNFTUJDXBUFSNFUFS,*5GPSNPEFMT3"o3";The kit comprises a SIEMENS WFH36 electronic volumetric meter with display and radio data transmission (featuring
the same characteristics as the heat meter: see §18) and two connection pipes housed inside the frame of the user
module in the holes made for that purpose.
For further information on the meter, see the supplied SIEMENS instructions.
9. DOMESTIC WATER METER (available on request)

15 912.807.1 - GB
INSTALLATION AND OPERATING MANUAL
The appliance is sold complete with electrical connections and power cable.
This machine is only electrically safe if it is correctly connected to an efcient earth system in compliance with current
safety regulations.
Connect the appliance to a 230V single-phase earthed power supply using the supplied three-pin cable, observing cor-
rect LIVE (L) - NEUTRAL (N) polarity.
Use a double-pole switch with a contact separation of at least 3mm.
When replacing the power supply cable, t a harmonised HAR H05 VV-F’ 3x1 mm2 cable with a maximum diameter of 8
mm.
10. ELECTRICAL CONNECTIONS
rEJTDPOOFDUUIFBQQMJBODFGSPNUIFNBJOTQPXFSTVQQMZVTJOHUIFUXPQPMFTXJUDIrSFNPWFUIFEPPSPGUIFDBTJOHVTJOHUIFTVQQMJFETRVBSFLFZrNBLFTVSFUIBUUIFTXJUDIJOEJDBUPSMJHIUJTPGGrMPPTFOUIFTDSFXTPOUIFDPWFSPGUIFFMFDUSJDBMCPYBOESFNPWFJUr5IF"SBQJEGVTFTBSFJODPSQPSBUFEJOUIFFMFDUSPOJDCPBSE(L) = LIVE brown
(N) = NEUTRAL blue
= EARTH yellow-green
10.1 ACCESS TO THE POWER SUPPLY TERMINAL BLOCK
Figure 7: Electric fuses
0606_1006 / CR_0023
INSTALLATION INSTRUCTIONS:
ELECTRICAL CONNECTIONS
fuse
fuse
electronic board

16 912.807.1 - GB
INSTALLATION AND OPERATING MANUAL
CR_0072 / 0905_0502
11.1 MODELS RA
11. WIRING DIAGRAMS
Cable colours R = Red V = Green G = Yellow G/V = Yellow/Green M = Brown C = Light Blue B = White N = Black
INLET
SERVOMOTOR
STORAGE BOILER
PROBE
MAINS POWER
230V-50HZ
SAFETY
THERMOSTAT
EXTERNAL PROBE
DHW FLOW SWITCH
THREE-WAY
VALVE
PUMP
DHW RECIRCULATION
PUMP
ON-OFF BUTTON
MIXING VALVE
SERVOMOTOR
HEATING PROBE
RESISTANCE

17 912.807.1 - GB
INSTALLATION AND OPERATING MANUAL
0905_0503 / CR_0084
11.2 MODELS RA2Z
Cable colours R = Red V = Green G = Yellow G/V = Yellow/Green M = Brown C = Light Blue B = White N = Black
HEATING PROBE
EXTERNAL PROBE
SAFETY
THERMOSTAT
INLET
SERVOMOTOR
HIGH TEMP. ZONE
SERVOMOTOR
THREE-WAY
VALVE
DHW RECIRCULATION
PUMP
P 1 BT PUMP
MAINS POWER
230V-50HZ
ON-OFF BUTTON
MIXING VALVE
SERVOMOTOR
DHW FLOW SWITCH
STORAGE BOILER
PROBE
RESISTANCE

18 912.807.1 - GB
INSTALLATION AND OPERATING MANUAL
12.1 WALL-HUNG STORAGE BOILER BAXI SIRIUS SAT B60
Depending on the models, follow the instructions below:
12. WIRING THE STORAGE BOILER
To electrically connect the storage boiler and the module, proceed as follows, also consulting the instructions supplied
with the storage boiler and gure 8:
SIRIUS SAT module
rBDDFTTUIFNPEVMFDBTJOHBTEFTDSJCFEJOQBSBHSBQIr"GUFSVOQMVHHJOHUIFBQQMJBODFSFNPWFUIFDPWFSPGUIFFYUFSOBMDPOOFDUPSBOEUIFFMFDUSJDIFBUFSBUUIFFOETPGterminals T2 – S3.
SIRIUS SAT B 60 storage boiler
rSFNPWFUIFMPXFSDPWFSPGUIFBQQMJBODFrSFNPWFUIFDPWFSPGUIFFYUFSOBMDPOOFDUPSr1PTJUJPOUIF3&%QJO554TDSFXDPOOFDUPSJOUIFVQQFSIPVTJOHBOEUIF#-"$,QJOTDSFXDPOOFDUPS-- - N) in the lower housing.
r6TFBEVBMJOTVMBUFEQJODBCMFTUBOEBSEi)"377'YNNiDBCMFUPDPOOFDUUIFTDSFXDPOOFDUPSTJOUIFtwo appliances:
DHW probe: terminals T2 - S3
DHW flow switch: terminals L1 - N
rDMPTFUIFDPWFSTPGUIFUXPQJODPOOFDUPSTFigure 8: connecting the LUNA SAT B 60 storage boiler
0904_2405 / CR_0090
SIRIUS SAT
SIRIUS SAT B 60
CHECK POSITION OF
SCREW CONNECTORS
(RED AND BLACK)
RED
BLACK T2-S3:STORAGE BOILER PROBE
L1-N: STORAGE BOILER FLOW SWITCH
ISB = STORAGE BOILER COIL INLET
USB = STORAGE BOILER COIL OUTLET
REMOVE
ELECTRICAL
RESISTANCE

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INSTALLATION AND OPERATING MANUAL
12.2 COMMERCIALLY AVAILABLE STORAGE BOILERS
The diameter of the storage boiler thermostat trap must be greater than 7 mm.
The storage boiler probe and the ow switch, supplied as accessories, must be used for this application.
To electrically connect the storage boiler and the module, proceed as follows, also consulting the instructions supplied
with the storage boiler and gure 9:
SIRIUS SAT module
rBDDFTTUIFNPEVMFDBTJOHBTEFTDSJCFEJOQBSBHSBQIr"GUFSVOQMVHHJOHUIFBQQMJBODFSFNPWFUIFDPWFSPGUIFFYUFSOBMDPOOFDUPSBOEUIFFMFDUSJDIFBUFSBUUIFFOETPGterminals T2 – S3.
r$POOFDUUIFDBCMFPGUIFTUPSBHFCPJMFSQSPCFUPUFSNJOBMT5m4JGUIFDBCMFOFFETFYUFOEJOHVTFBTUBOEBSEi)"3VV-F 2x 0.5 mm2 “):
r6TFBEVBMJOTVMBUFEQJODBCMFTUBOEBSEi)"377'YNNiDBCMFUPDPOOFDUUFSNJOBMT-/PGUIFTDSFXconnector to the ow switch contacts.
DHW probe: terminals T2 - S3
DHW flow switch: terminals L1-N
rJOTFSUUIFQSPCFJOUPUIFTUPSBHFCPJMFSUSBQBOETFDVSFJUrDMPTFUIFDPOOFDUPSDPWFSThe DHW ow switch must be installed on the domestic hot water inlet pipe.
Figure 9: electrically connecting a commercially available storage boiler
0904_2406 / CR_0091
SIRIUS SAT
CHECK POSITION OF
SCREW CONNECTORS
(RED AND BLACK)
RED
BLACK
T2-S3:STORAGE BOILER PROBE
L1-N: STORAGE BOILER FLOW SWITCH
ISB = STORAGE BOILER COIL INLET
USB = STORAGE BOILER COIL OUTLET
STORAGE BOILER
WITHOUT
DHW THERMOSTAT
STORAGE BOILER PROBE
FLOW SWITCH
REPLACE
ELECTRICAL
RESISTANCE

20 912.807.1 - GB
INSTALLATION AND OPERATING MANUAL
12.3 STORAGE BOILER WITH DHW THERMOSTAT (COMMERCIALLY AVAILABLE)
This application is not recommended as it does not allow all the functions on the electrical board of the module
(DHW adjustment, anti-legionellosis,…) to be used.
To electrically connect the storage boiler and the module, proceed as follows, also consulting the instructions supplied
with the storage boiler and gure 10:
SIRIUS SAT module
rBDDFTTUIFNPEVMFDBTJOHBTEFTDSJCFEJOQBSBHSBQIAfter unplugging the appliance, remove the cover of the external connector and replace the electric heater at the ends of
terminals T2 – S3 with the supplied version.
r6TFBEVBMJOTVMBUFEQJODBCMFTUBOEBSEi)"377'YNNiDBCMFUPDPOOFDUUIFTUPSBHFCPJMFSDPOUBDUT(C – 1) to the terminals L1 – N of the external connector:
Storage boiler DHW thermostat: terminals L1 - N
rDMPTFUIFDPOOFDUPSDPWFSattention: make sure that the storage boiler water temperature (set using the storage boiler thermostat) is set to
a lower temperature than that of the system water. Otherwise, the module will not be able to complete heating
the water in the storage boiler.
Position the DHW potentiometer (figure 14.B) of the electronic board at the maximum temperature (65°C).
Figure 10: electrically connecting a storage boiler with thermostat (commercially available)
0904_2407 / CR_0092
SIRIUS SAT
CHECK POSITION OF
SCREW CONNECTORS
(RED AND BLACK)
RED
BLACK
L1-N: STORAGE BOILER THERMOSTAT
ISB = STORAGE BOILER COIL INLET
USB = STORAGE BOILER COIL OUTLET
STORAGE BOILER
WITH
DHW THERMOSTAT
DHW THERMOSTAT
CONTACTS
REPLACE
ELECTRICAL
RESISTANCE