90 F - Boiler Baxi - Free user manual and instructions

USER MANUAL 90 F Baxi

PERICOLO ALTA TENSIONE

As constantly strives to improve its products, it reserves the right to modify the information contained in this document at any time and without prior notice. This document is issued purely for the sake information and should not be considered as a contract with third parties.

DESCRIPTION OF SYMBOLS

WARNING

Risk of damage to or malfunction of the appliance. Pay special attention to the warnings concerning danger to people.

DANGER-HIGH VOLTAGE

Live components - electrocution hazard.

IMPORTANT INFORMATION

Information to read with particular care as it is useful for the correct operation of the boiler.

1. INTRODUCTION

The boiler can independently manage up to three heating circuits by using external accessories such as room units, remote controls and external modules. The boiler electronics comprises a wide range of functions for personalising and managing various system types. To assure correct system operation, a number (from 1 to 3) must be assigned to each accessory in order to allow the boiler board to recognise it.

To use the AVS75.391 accessory the remote control unit (available as an accessory) is required.

2.DESCRIPTION OF ACCESSORY

Using this accessory, the device is able to handle:

• Heating circuits at different temperatures;
  Solar plant;
• Other specific applications (swimming pool heating, DHW circulation pump, connection to biomass system, etc.).

This accessory can directly manage the circuit components (pump, temperature sensor, mixing valve, etc.) up to a maximum of 3 independent relay outlets, 2 temperature sensors and 1 control input. Some predefined functions can be used to simplify system configuration.

The Remote Control must be used to set the parameters of the described configurations. To change the parameters and the connections in the instrument panel terminal blocks, consult the boiler instructions manual.

2.1 WALL INSTALLATION REQUIREMENTS

Before starting installation:

• Disconnect the mains power supply.
• Make sure enough air circulates outside the box to disperse the heat produced by the AVS 75 accessory.
• Do not expose the unit to splashes of water or heat sources.

Only power the unit after completing installation.

2.2 WALL INSTALLATION

Mount the device on the wall with the two pressure screws supplied with the accessory, using the holes in the junction box. Connect the unit to the master boiler and the accessories as described in section 3. To secure it, see the measurements indicated in the figure to the side.

A C	amp for power cable
B Holes for wall-mounting
C	Grommets for external electrical accessories

Only power the unit after completing installation.

3. ELECTRICAL CONNECTIONS

Pass the cables connecting the boiler to the accessories using the relative grommets holes on the bottom of the boiler.

3.1 BOILER ELECTRICAL CONNECTIONS

• Connect the device to a 230V single-phase power supply with earth.
• This appliance must only be installed by a qualified installer.
• Before switching on, make sure all the electrical connections have been made correctly.
• Carefully read the boiler instructions manual.
• Connect the 2-pin terminal block of the AVS75 unit to the boiler terminal block M2 (2-3) using a "HAR H05 VV-F" 2 × 0.5 ~mm harmonicised cable with a maximum length of 150 ~m .

3.2 ELECTRICAL CONNECTIONS OF EXTERNAL ACCESSORIES

To connect the AVS75 accessory to the external accessories proceed as follows (use "HAR H05 VV-F" harmonised cables with a cross-section of 1mm^2 ):

MIXED CIRCUIT CASE (see diagram chap. 3.2.1)

• Connect the mixed zone pump to the QX23 connector on the AVS75.
• Connect the mixed zone delivery sensor to the BX21 connector on the AVS75 (QAD36 supplied).
• Connect the mixing valve to the QX22-QX21 connector
• Connect the ambient thermostat to the H2 connector on the AVS75.
• Connect the safety thermostat to the FX23 connector.

DHW SOLAR PLANT CASE (see diagram chap. 3.2.2)

• Connect the solar plant pump to the QX23 connector on the AVS75.
• Connect the solar boiler sensor to the BX22 connector on the AVS75.
• Connect the solar panel sensor to the BX21 connector on the AVS75.

KEY TO CONNECTORS
N⊕L (L-N)	AVS 75 power input
X50	Connector linking the SIEMENS electronic board to the AVS 75 accessory.
X30	Connector for linking another accessory via a flat cable.
T (QX21⊕N)	230V programmable relay output
T (QX22⊕N)	230V programmable relay output
S (QX23⊕N)	230V programmable relay output
C (EX21-FX23-L)	connection to safety thermostat (only for mixed zones)
n (H2-M)	12VDC digital or 0-10VDC analogue programmable input.
n (BX21-M)	NTC 10K / Pt1000 sensor programmable input
n (BX22-M)	NTC 10K / Pt1000 sensor programmable input

3.2.1 MIXED CIRCUIT CASE

A FLOW PROBE QAD36 C MIXED ZONE PUMP
B MIXING VALVE D SAFETY THERMOSTAT

For a mixed zone, connect the safety thermostat between terminals FX23 - L and jumper terminals EX21 - FX23. The circuit pump connected to relay QX23 is thus internally connected in series to the safety thermostat.

If the relay output QX23 must be used for functions other than those required for the mixed zone, jumper terminals FX23 - L.

To make settings, enter the parameters menu on the Remote Control as indicated below:

KEY TO FIGURE MENU

1	Enduser	3	Engineer
2	Commissioning	4	OEM

The procedure for accessing the four menus in order to programme the boiler board and/or the Remote Control is the following:

from the main menu C.
A and C (hold down for approx. 6 seconds)
menu 1-2-3-4 (see figure to side and key).
- C to go back one menu at a time to the main menu.

KEY FUNCTIONS FOR EDITING PARAMETERS

B	Menu II / scroll the menu parameters / select the parameter value
B	Enter the chosen menu / select the parameter to edit / confirm the selected value
C	Return to the previous menu

In all the presented configurations, if a Remote Control or a room unit is used, set them to room unit 1 in order to manage the DHW functions and the boiler stand- by, as well heating zone 1. If they are set as room unit 2 or room unit 3 only heating zones 2 and 3 respectively can be managed. See the instructions manual of the respective accessories for the configuration procedure.

After each system configuration process, carry out the following procedure for saving the components to the boiler.

• Access menu 2 as indicated at the beginning of this section.

• B Configuration B programme row 6200 then B.
  B Yes then B to confirm.

If the appliance is connected to an underfloor system, install a limit thermostat to prevent the latter from overheating.

The AVS 75 accessory can be configured to manage a low temperature circuit. The AVS 75 can therefore control the pump, the mixing valve and the flow sensor of the selected heating circuit as shown in the following schemes.

For a low temperature system, reduce the maximum CH temperature setpoint on the boiler by setting parameter 741 (see section 8.1) to a value not greater than 45^ .

Edit the parameter governing the closing of the mixing valves, depending on the model used, according to the following instructions.

The diagrams shown below refer to boilers with power less than 35kW . For boilers with power over 35kW , there must be a hydraulic separator upstream from the boiler and the zones must be equipped with zone pumps to replace the electrovalve.

5.1 SCHEME 1

Low temperature zone with ambient unit - heating circuit (1) High temperature zone with ambient thermostat - heating circuit (2)

1 External sensor - terminal block M2 (4-5) on boiler

2 Low temperature zone mixing valve (QX21-N-QX22)

3 Low temperature circuit pump (QX23-N)

4 Low temperature circuit probe (BX21-M)

5 Low temperature circuit safety thermostat (FX23-L)

6 Ambient unit - terminal block M2 (1-2-3) on boiler

7 Electrovalve or externally powered high temperature zone pump

8 High temperature zone ambient thermostat (for connection see chapter 7.1)

Enter menu 2 from the control panel, as described in section 4, and make the following settings:

MENU	PROGRAMME ROW	VALUE TO SET DESCRIPTION
CONFIGURATION	5715 On Heating circuit 2 enable
	5977	Room thermostat CH2	Enable thermostat for circuit 2 (contact 1-2 terminal block M1)
	6020 Tems / mode CH1 Low temperature zone enable
	6024	Limit thermostat CH	EX21 input enabled as low temperature zone protection
	6046	Heat generation lock	H2 input enabled as low temperature zone protection
HEATING CIRCUIT 1	742	---	Modulating flow temperature enable (low temperature zone)
	834	Default 180 s	Mixing valve close time

The room unit can directly control the low temperature zone according to the required room temperature. If, when turning the knob B on the main menu, the display visualises the boiler flow temperature instead of the ambient temperature, parameter 742 has not been set correctly.

5.2 SCHEME 2

More than one low temperature zone with ambient thermostat and shared room unit - heating circuit(1) High temperature zone with ambient thermostat - heating circuit (2)

1 External sensor - terminal block M2 (4-5) of boiler

2 Low temperature zone mixing valve (QX21-N-QX22)

3 Low temperature circuit pump (QX23-N)

4 Low temperature circuit probe (BX21-M)

5 Low temperature circuit safety thermostat (FX23-L)

6 Room unit - terminal block M2 (1-2-3) of boiler

7 Low temperature zone ambient thermostat input (H2-M - for connection see chapter 7.4)

8 Electrovalve or externally powered high temperature zone pump

9 High temperature zone ambient thermostat (for connection see chapter 7.1)

Enter menu 2 from the control panel, as described in section 4, and make the following settings:

MENU	PROGRAMME ROW	VALUE TO SET DESCRIPTION
CONFIGURATION	5715 On Heating circuit 2 enable
	5977	Room thermostat CH2	Enable thermostat for circuit 2 (contact 1-2 terminal block M1)
	6020 Tems / mode CH1 Low temperature zone enable
	6024	Limit thermostat CH	EX21 input enabled as low temperature zone protection
	6046	Room thermostat CH1	H2 input enabled as low temperature zone room thermostat
HEATING CIRCUIT 1	710	35°C	Room setpoint (low temperature zone)
	834	Default 180 s	Mixing valve close time

Set the comfort temperature to it maximum value (35^) to ensure the low temperature zones work correctly. This ensures that the room unit does not block the heat demand of the individual room thermostats managing the subzones.

In this case, the room unit manages the low temperature system, but it cannot be used to manage the temperature of one of the rooms. Turn knob B to display the boiler flow temperature. The heating circuit operates with a fixed flow.

5.3 SCHEME 3

Low - heating circuit (1) and high temperature - heating circuit (2) zones with ambient thermostat.

1 External sensor - terminal block M2 (4-5) of boiler

2 Low temperature zone mixing valve (QX21-N-QX22)

3 Low temperature circuit pump (QX23-N)

4 Low temperature circuit probe (BX21-M)

5 Low temperature circuit safety thermostat (FX23-L)

6 Low temperature zone room thermostat input (H2-M)

7 Electrovalve or externally powered high temperature zone pump

8 High temperature zone ambient thermostat (for connection see chapter 7.1)

Enter menu 2 from the control panel, as described in section 4, and make the following settings:

MENU	PROGRAMME ROW	VALUE TO SET DESCRIPTION
CONFIGURATION	5715 On Heating circuit 2 enable
	5977	Room thermostat CH2	Enable thermostat for circuit 2 (contact 1-2 terminal block M1)
	6020 Tems / mode CH1 Low temperature zone enable
	6024	Limit thermostat CH	EX21 input enabled as low temperature zone protection
	6046	Room thermostat CH1	H2 input enabled as low temperature zone room thermostat
HEATING CIRCUIT 1	834	Default 180 s	Mixing valve close time

6. ZONE HEATING SYSTEM

If it is not necessary to manage mixed systems, the AVS75 accessory can be used to command zone pumps/electrovalves, as illustrated below:

To avoid frequent starting and stopping, raise the minimum temperature setpoint of the boiler in the heating mode by setting parameters 740, 1040 and 1340 (see section 8.1) to not less than 45^ .

6.1 SCHEME 4

Two zones with ambient unit heating circuits (1 and 2) and 1 zone with room thermostat heating circuit (3).

1	External sensor - terminal block M2 (4-5) of boiler	5	Circuit 2 ambient unit - terminal block M2 (1-2-3) of boiler
2	Circuit 1 zone pump or electrovalve (QX21-N)*	6	Electrovalve or externally powered circuit 3 zone pump
3	Circuit 1 ambient unit - terminal block M2 (1-2-3) of boiler	7	Circuit 3 ambient thermostat (for connection see chapter 7.1)
4	Electrovalve or circuit 2 zone pump (QX22-N)*

* The AVS 75 accessory cannot directly command a 3-wire electrovalve. A relay with an exchange contact must be used instead.

Room units 3 and 5 are connected in parallel.

The ambient units can directly control their respective zones according to the desired room temperature. Enter menu 2 from the control panel, as described in section 4, and make the following settings:

MENU	PROGRAMME ROW	VALUE TO SET	DESCRIPTION
CONFIGURATION	5715	On	Heating circuit 2 enable
	5721	On	Heating circuit 3 enable
	5977	Room thermostat CH3	Enable thermostat for circuit 3 (contact 1-2 terminal block M1)
	6020	Multifunctional	-
	6030	Heating pump CH1 Q2	Circuit 1 pump/electrovalve control
	6031	Heating pump CH2 Q6	Circuit 2 pump/electrovalve control
HEATING CIRCUIT 1	742	---	Enable modulating flow temperature (heating circuit 1)
HEATING CIRCUIT 2	1042	---	Enable modulating flow temperature (heating circuit 2)

The room units can directly control their respective zones according to the desired room temperature. If, when turning the knob B on the main menu, the display visualises the boiler flow temperature instead of the ambient temperature, parameters 742, 1042 and 1034 have not been set correctly.

6.2 SCHEME 5

1	External sensor - terminal block M2 (4-5) of boiler	5	Circuit 2 ambient unit - terminal block M2 (1-2-3) of boiler
2	circuit 1 zone electrovalve (QX21-N)*	6	circuit 3 zone electrovalve (QX21-N)*
3	Circuit 1 ambient unit - terminal block M2 (1-2-3) of boiler	7	Circuit 3 ambient unit - terminal block M2 (1-2-3) of boiler
4	circuit 2 zone electrovalve (QX22-N)*

• The AVS 75 accessory cannot directly command a 3-wire electrovalve. A relay with an exchange contact must be used instead.

Room units 3 - 5 and 7 are connected in parallel.

The room units can directly control their respective zones according to the desired room temperature. Enter menu 2 from the Remote Control, as described in section 4, and make the following settings:

MENU	PROGRAMME ROW	PARAMETER VALUE TO SET DESCRIPTION
CONFIGURATION	5715	Temps / mode CH2	On	Heating circuit 2 enable
	5721	Temps / mode CH3	On	Heating circuit 3 enable
	5977	Function input H5	None	Disable thermostat in terminal block M1 (1-2) on board
	6020	Function extension module 1	Multifunctional	-
	6030	Relay output QX21 module 1	Heating pump CH1 Q2	Circuit 1 pump/electrovalve control
	6031	Relay output QX22 module 1	Heating pump CH2 Q6	Circuit 2 pump/electrovalve control
	6032	Relay output QX23 module 1	Heating pump CH3 Q20	Circuit 3 pump/electrovalve control
HEATING CIRCUIT 1	742	Flow temp setpoint room stat ---		Enable modulating flow temperature (heating circuit 1)
HEATING CIRCUIT 2	1042	Flow temp setpoint room stat	---	Enable modulating flow temperature (heating circuit 2)
HEATING CIRCUIT 3	1342	Flow temp setpoint room stat	---	Enable modulating flow temperature (heating circuit 3)

The room units can directly control their respective zones according to the desired room temperature. If, when turning the knob B on the main menu, the display visualises the boiler flow temperature instead of the ambient temperature, parameters 742, 1042 or 1342 have not been set correctly.

7. ELECTRICALLY CONNECTING THE AMBIENT THERMOSTAT

The operating temperature is the same for all circuits.

The relays can be replaced with valves equipped with micro limit switches and vice versa.

7.1 CASE - 1 - Connecting a single ambient thermostat in a high temperature zone.

Connect the ambient thermostat to the external electric network (230V) which will supply the zone valve (or pump) and the relay coil; connect the relay contact to the boiler M1 terminal block (1-2).

7.2 CASE - 2 - Connecting ambient thermostats for a high temperature multi-zone system.

Connect the ambient thermostat in parallel to the external electric network (230V) which will supply the zone valve (or pump) and the relay coils; connect the relay contacts in parallel to the boiler M1 terminal block (1-2).

7.3 CASE - 3 - Connecting ambient thermostats for a low temperature multi-zone system.

Connect the ambient thermostats in parallel to the external electric network (230V) which will supply the zone valves (or pumps) and the relay coil; connect the relay contact to the AVS75 H2-M terminal blocks.

7.4 CASE - 4 - Connecting ambient thermostats for a low temperature multi-zone system with micro limit switches in the zone valves.

Connect the ambient thermostats in parallel to the external electric network (230V) which will supply the zone valves; connect the micro switch contacts in parallel to the AV75 H2-M terminal blocks.

8. DHW SOLAR PLANT

In this configuration, the AVS 75 accessory can manage the solar circuit pump, the manifold sensor and the storage boiler sensor (relative to the solar plant) according to the following scheme:

1	solar storage heater sensor B31 (BX22-M)	3	solar circuit pump Q5 (QX23-N)
2	solar storage heater manifold B6 (BX21-M)	4	storage boiler sensor B3 - terminal block M2 (9-10) on board

Use specific sensors for this application (supplied as an accessory).

Enter menu 2 from the Remote Control, as described in section 4, and make the following settings:

MENU	PROGRAMME ROW	VALUE TO SET	DESCRIPTION
CONFIGURATION	6020	Solar HW	Solar function enable

The following parameters can be used. If solar panels with vacuum tubes are used, enable the specific safety function (parameters 3830, 3831):

MENU	PROGRAMME ROW	VALUE TO SET	DESCRIPTION
CONFIGURATION	3810 Default 8°C		Temperature difference between manifold and solar sensor storage boiler for solar pump activation
	3811 Default 4°C		Temperature difference between manifold and solar sensor storage boiler for solar pump deactivation
	3850 Default “---”		Temperature above which the manifold pump circulates (only if the maximum temperature of the storage boiler is not reached)
Access menu 3 section 5.2)
SOLAR	3830 Default “---”		Maximum stop time of solar pump if the manifold temperature reaches its maximum value (parameter 3850) within the minimum circulation time (parameter 3831)
	3831 Default 30s Minimum		circulation time of manifold pump

When the symbol appears on the display, it means that the solar plant pump is heating the storage boiler.

9. PARAMETERS SETTING

9.1 HEATING SYSTEM

Remote Control			CR 1, 2, 3 HEATING CIRCUIT MENU		Factory setting	Minimum	Maximum
CR1	CR2	CR3
700	1000	1300	Off: the boiler lights when the room temperature is < 6°C Timed: the room temperature depends on the set time band Reduced: the room temperature is reduced On: the room temperature is comfort	-	Comfort	-	-
710	1010	1310	Comfort room temperature	°C	20	Reduced	Maximum comfort
712	1012	1312	Reduced room temperature	°C	16	Anti-freeze	Comfort
714	1014	1314	Anti-freeze room temperature	°C	6	4	Reduced
720	1020	1320	Climate curve selection for external sensor	-	1.5	0.1	4
730	1030	1330	With an external sensor and in the automatic operating mode, automatic heating control activates (ON-OFF) depending on the set temperature (external)	°C	---	8	30
740	1040	1340	Minimum flow value (e.g.: with the modulating flow function enabled)	°C	25	8	Maximum setpoint
741	1041	1341	Maximum flow value (e.g.: with the modulating flow function enabled)	°C	80	Minimum setpoint	95
742	1042	1342	Flow temperature with room unit (- = modulating flow enable)	°C	80	Minimum setpoint	Maximum setpoint
750	1050	1350	Importance of room temperature with respect to the external temperature and vice-versa (room influence function): - %: pure climate 1.99 %: climate with room offset 100 %: pure room	% 50	1	100
760	1060	1360	Boiler off differential depending on the required room temperature	°C	0.5	0.5	4
809	1109	1409	The boiler pump and the circuit pump remain active 24h	-	no	-	-
834	1134	1434	Closing time of low temperature mixing valve	s	180	30	873
850	1150	1450	The 'manual' function is recommended	-	off
851	1151	1451	Flow temperature for dry screed function	°C	25	0	95
855	1155	1455	Current flow temperature of dry screed function	°C	-	-	-
856	1156	1456	Day of the week during activation of dry screed function	-	-	-	-

CR = Heating Circuit

9.2 DHW SYSTEM

Remote Control	DHW CIRCUIT MENU		Factory setting	Minimum	Maximum
1600	Operating mode Off = setpoint equal to anti-freeze setpoint On = rated setpoint Eco = pre-heating disabled	-	on --
1610 DHW rated setpoint °C 60 35 60
1612 Reduced DHW setpoint °C 35 8 60
1620	Hourly programming enable	-	24h/day	-	-
1640	Anti-legionellosis function operating mode: Off Periodically Fixed weekday	-	off --
1641	N° days between one anti-legionellosis function and the next (1...7)	-	7	-	-
1642	Anti-legionellosis function day (Monday...Sunday)	-	Monday	-	-
1644	Anti-legionellosis start time	-	----	-	-
1660 DHW recirculation pump operating mode	-		Hot water release	-	-
1663	Temperature at which the DHW pump stops	°C	45	8	60

9.3 SUNDRY PARAMETERS

Control panel	CONFIGURATION MENU	Factory setting
5710	Heating circuit 1 enable	on
5721	Heating circuit 3 enable	off
5730	Setting of DHW sensor depending on the type of boiler(stORAGE or instantaneous)
5731	Type of actuator for DHW priority control	Diverting valve
5970	DHW priority sensor (for instantaneous boilers)	-
5971	Home position of contact	-
5973	Parameters for determining DHW demand water flow	-
5974		-
5975		-
5976		-
5977	Input for ambient thermostat of one of the heating circuits	Room thermostat CH1
5978		-
6020	Multifunction: the inputs and outputs can be configured manually	-
6021	Heating circuit 1, 2 or 3: manages a mixed zone (1, 2 or 3 - chapter 5)Return temp controller: not used	-
6022	Solar HW: manages a solar plant with 2 sensors and pump (section 7)Primary contr/system pump: not used	-
6024	Input for low temperature circuit safety thermostat (module 1)	-
6026	Input for low temperature circuit safety thermostat (module 2)	-
6028	Input for low temperature circuit safety thermostat (module 3)	-
6030...6038	See section 9	-
6040...6045	See section 9	-
6046...6068	See section 9	-
6097	Type of sensor used for solar manifold	Pt 1000
6200	Saving of all the sensors connected in the boiler and accessories (section 4)	-
6212	Manufacturer information	-
6213	Manufacturer information	-
6215	Manufacturer information	-
6217	Manufacturer information	-
6230	Manufacturer information	-
6231	Manufacturer information	-
6704	Internal code display enable	yes
6705	Internal code of current error	-
6706	Burner phase during which the error appeared	-
6710	External alarm reset (section 9)	no
6800	Last error	-
6805	Internal code of last error	-
6806	Burner phase of last error	-
6810 to 6996 Error log		-

10. SUNDRY FUNCTIONS

As well as the above settings, the inputs and outputs can also be configured according to system requirements. The following examples consider the relay QX21 and sensor BX21 output of the accessory, though the same applies to relays QX22, QX23 and the sensor BX22. In all cases, set the accessory to "Multifunctional".

MENU	PROGRAMME ROW	PARAMETER VALUE TO	SET DESCRIPTION
CONFIGURATION	6020	Extension module 1 function	Multifunctional Solar function enable

If a storage boiler is used in the DHW circuit, the circulation pump can be controlled. This function is limited by the hourly programming of the DHW system. To minimise circulation losses, the function activates the pump for 10 minutes followed by a 20 minute pause. Enter menu 2 from the control panel, as described in section 4:

MENU	PROGRAMME ROW	VALUE TO SET DESCRIPTION
CONFIGURATION	6030	Circulating pump Q4	DHW recirculation pump enable (relay QX21 output)
	6040 HW	circulation sensor B39 DHW	recirculation sensor enable (sensor BX21)
DHW CIRCUIT	1663	factory setting = 45°C	DHW temperature below which the pump is enabled (recirculation setpoint)

10.2 SOLAR PLANT FOR SWIMMING POOL

Heating a swimming pool with solar panels can be achieved as follows.

1	Solar storage heater sensor B31 (BX22-M)	5	Swimming pool pump (QX21-N)
2	Solar storage heater manifold B6 (BX21-M)	6	Swimming pool heating return sensor – terminal block M2 in boiler
3	Solar circuit pump Q5 (QX23-N)	7	Swimming pool
4	Storage boiler sensor B3 – terminal block M2 (9-10) of boiler

Use specific sensors for this application (supplied as an accessory).

Configure the system as described in section 8. At this point the DHW system is configured to use solar panels. Enter menu 2 from the Remote Control, as described in section 4:

MENU	PROGRAMME ROW	VALUE TO SET	DESCRIPTION
CONFIGURATION	5931	Swimming pool sensor B13	Swimming pool sensor enable (BX2 sensor input)
	6030	Solar ctrl elem swi pool K18	Swimming pool heating pump enable (relay QX21 output)
DHW CIRCUIT	6046	Release swi pool solar	Swimming pool heating activation (e.g.: via float or manual command)

It is important to use contact H2 as it assures correct system operation, allowing heat exchange with the swimming pool only if the latter allows it to do so. Make sure the swimming pool is full of water and operative.

10.3 GENERIC HEAT DEMAND

A generic heat demand does not come from one of the three available heating circuits and/or from the DHW circuit. This type of demand is called user demand and is used to provide heat to external units such as heating water in a swimming pool.

To enable this function, perform the following configuration procedure. Enter menu 2 from the Remote Control, as described in section 4:

MENU	PROGRAMME ROW	VALUE DESCRIPTION
CONFIGURATION	6030	Cons circuit pump VK1 Q15	External demand 1 pump enable (relay QX21 output)
	6046	Consumer request VK1 External demand 1 contact
USER CR1	1859 factory setting = 70°C Heating flow temperature for external demand 1

If the user demand is provided via a 0-10 V analogue signal, set parameter 6046 to "User demand CR1 10V". Also set signal characteristics using the following parameters:

6049

Valore tens. 1 H2 modulo 1

6050

Valore 1 H2 modulo 1

6051

Valore tens. 2 H2 modulo 1

6052

Valore 2 H2 modulo 1

10.4 OTHER CONFIGURATIONS

Further configurations are summarised below:

QX21 relay

Alarm output K10	Alarm (e.g.: condominium)
System pump Q14	Pump active at every heating or external demand
Time setting 5 K13	Contact commanded from “aux hourly programme”
Refrigeration request K28 Cooling	Demand from chiller circuit 1
Water refill K34	Boiler automatic filling valve
Fan shutdown K38	External fan control

BX21 sensor

Buffer sensor B4	Storage boiler sensor for heating (higher)
Buffer sensor B41	Storage boiler for heating (lower)
Buffer sensor B42	Third storage boiler probe for heating (half of storage boiler)

H2 input

Error/alarm message	External alarm signal
Boiler flow switch	Boiler flow switch command (only to use if not on the boiler)
Boiler temp limiter	Boiler thermostat command (only to use if not on the boiler)
Consumer request VK1 10V	External demand 1 with 0-10V signal (*)
Pressure measurement 10V	Pressure measurement with 0-10V signal (*)
Preselected output 10V	Boiler power adjustment according to 0-10V signal (*)

• To use the functions set the characteristics of the analogue signal using the following parameters present in the Configuration menu of the Remote Control:

6049

Voltage value 1 H2 module 1

6050

Funct value 1 H2 module 1

6051

Voltage value 2 H2 module 1

6052

Funct value 2 H2 module 1

The illustrated configurations also apply to the other board relays/sensors/Input, such as relay QX1 (row 5890) or sensors BX2 (row 5931) and BX3 (row 5932).

11. LIST OF FAULTS

E	Fault Description of fault
10	External probe sensor	Heating circuit enabled with no command (thermostat, room unit or external unit) or external probe faulty
84 B$B, address conflict 2 or more	room units configured for the same heating circuit
98 Additional module 1 AVS 75 accessory not detected or recognised
99 Additional module 2 AVS 75 accessory not detected or recognised
373 Additional module 3 AVS 75 accessory not detected or recognised
30 Flow sensor 1 Mixed circuit 1 sensor not detected
32 Flow sensor 2 Mixed circuit 2 sensor not detected
260 Flow sensor 3 Mixed circuit 3 sensor not detected
335 BX21 no function BX21 sensor not configured
336 BX22 no function BX22 sensor not configured
324 BX same sensors	Two or more sensors configured for the same function
52 DHW 2 sensor DHW solar sensor	not detected
73 Manifold 1 probe Solar manifold sensor not detected
57 DHW circulation sensor DHW circulation sensor not detected
243 Swimming pool sensor Swimming pool sensor not detected
25 Wood boiler sensor Biomass boiler sensor not detected
346 No Q10 boiler pump Biomass boiler pump not detected

12. TECHNICAL SPECIFICATIONS

Power input	Input voltage	AC 230 V (±10 %)
	Operating frequency	50/60 Hz
	Power input	4 VA
	Power supply fuse (power supply and outputs)	max. 10 AT
Cables	Rigid or flexible wire (braided or with ferrule)	-
	one-pole	0.5...2.5 mm²
	two-pole	0.5...1.5 mm²
Operating data	Software class	A
	Operating mode EN 60 730	1b (automatic operation)
Inputs	Digital input H2	-
	very low safety voltage for clean contact	-
	low voltage contact	-
	voltage with contact open	DC 12 V
	current with contact closed	DC 3 mA
	Analogue input H2	-
	Very low protection voltage	-
	range	DC 0..10 V
	internal resistance	> 100 kW
	Input L	AC 230 V (±10%)
	internal resistance	> 100 kW
	Input sensors BX21, BX22	NTC 10k
	permitted connection cables (copper)	-
	cross-section	mm²	0.25	0.5	0.75	1.0	1.5
	maximum length	m	20	40	60	80	120
Outputs	Output relay	-
	current range	AC 0.02...2 (2) A
	maximum starting current	15 A for ≤1 s
	maximum current (for all relays)	AC 6 A
	voltage range	AC 24...230 V (for clean contact)
Interface	BSB	connection with 2 cables, not interchangeable
	length of base unit - peripherals	max. 200 m
	total length	max. 400 m (maximum capacity of cable 60nF)
	cable cross-section	0.5 mm²

SOMMAIRE

2.1 CONDITIONS REQUISES POUR L'INSTALLATION AU MUR

10.3 VŠEOBECNÍ POŽADAVEK TEPLA