40F - Central heating boiler Baxi - Free user manual and instructions

USER MANUAL 40F Baxi

PERICOLO ALTA TENSIONE

8.4 CASE - 4 - Connecting ambient thermostats for a low temperature multi-zone system

WARNING Risk of damage to or malfunction of the appliance. Pay special attention to the warnings concerning dan- ger 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.7104900.03 (1-11/13) 20 INSTALLER Section (EN)

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 also 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.

2. DESCRIPTION OF ACCESSORY

This accessory allows the boiler to manage

• Heating circuits at different temperatures.• Solar plant.• Other specic applications (swimming pool, DHW circulation pump, 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 predened functions can be used to simplify system conguration. To change the parameters and the connections in the instrument panel terminal blocks, consult the boiler instructions ma- nual. The Remote Control must be used to set the parameters of the described congurations. Check that the boiler is prearranged for this accessory.

3. MOUNTING ON THE BOILER CONTROL PANEL

Remove the cover A of the control panel B. Lift the control panel B and connect the at cable between the connector X50 of the ac- cessory AGU2.550 and the connector X41 of the boiler board, threading it through the hole in the control panel B. Close the con- trol panel B and insert the AGU2.550. Make the required electrical connections and attach the new cover C present in the pack.

Terminal block M1 is at high voltage. Before making connections, make sure the appliance is disconnected from the power supply. If the appliance is connected to an underoor system, install a limit thermostat to prevent the latter from overheating. Make sure that the total rated output of the accessories connected to the AGU 2.550 is lower than 0.5 A. If it is higher, t a relay between the AGU 2.550 and the accessory (e.g.: pump). GENERAL CONFIGURATION Congure the accessory AGU 2.550, using the switch shown in the gure, as module (1) (the setting is screen-printed onto the body of the accessory) . If supplementary accessories are used, congure them as modules (2) and (3).7104900.03 (1-11/13) 22 INSTALLER Section (EN)

4.1 ELECTRICAL CONNECTIONS OF EXTERNAL ACCESSORIES

To connect the AGU 2.550 accessory to the external accessories proceed as follows (use “HAR H05 VV-F” harmonised cables with a cross-section of 1 mm

• Connect the mixed zone pump to the QX23 connector on the AGU 2.550.

• Connect the cascade delivery sensor to the BX21 connector on the AGU 2.550 (QAD36 available as an accessory).

• Connect the mixing valve to the QX22-QX21 connector.

• Connect the ambient thermostat to the H2 connector on the AGU 2.550. DHW SOLAR PLANT CASE (see diagram chap. 4.2)

• Connect the solar plant pump to the QX23 connector on the AGU 2.550.

• Connect the solar boiler sensor to the BX22 connector on the AGU 2.550.

• Connect the solar panel sensor to the BX21 connector on the AGU 2.550.

To make settings, enter the parameters menu on the Remote Control as indicated below:KEY TO FIGURE MENU Enduser Engineer Commissioning

OEM The following procedure is used to access the four boiler pro-gramming menus:

• from the main menu C.

A andC (hold down for approx. 6 seconds) B menu 1-2-3-4 (see gure to side and key).

C to go back one menu at a time to the main menu.KEY FUNCTIONS FOR EDITING PARAMETERS

Menu Il / scroll the menu parameters / select the parameter value Enter the chosen menu / select the parameter to edit / conrm the selected value Return to the previous menu In all the presented congurations, 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 conguration procedure. After each system conguration 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 Conguration B B programme row 6200 then B.

B Yes then B to conrm.

6. MIXED HEATING SYSTEM

The AGU 2.550 accessory can be congured to manage a low temperature circuit. The AGU 2.550 can therefore control the pump, the mixing valve and the ow sensor of the selected heating circuit as shown in the following schemes. The diagrams in this document are purely indicative and must be backed by a technical thermal analysis. 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 35 kW. For boilers with power over 35 kW, there must be a hydraulic separator upstream from the boiler and the zones must be equipped with zone pumps to replace the electrovalve.

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 the boiler2 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 (12V) (H2-M)6 Ambient unit - terminal block M2 (1-2-3) on the boiler7 Electrovalve or externally powered high temperature zone pump8 High temperature zone ambient thermostat (for connection see chapter 8.1)

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) on the boiler2 Low temperature zone mixing valve (QX21-N-QX22)3 Low temperature circuit pump (QX23-N)4 Low temperature circuit probe (BX21-M)5 Ambient unit - terminal block M2 (1-2-3) on the boiler 6 Low temperature circuit safety thermostat (connect in series to the electrovalves, see chap. 8.4) 7 Low temperature zone room thermostat input (12V) (H2-M)8 Electrovalve or externally powered high temperature zone pump9 High temperature zone ambient thermostat (for connection see chapter 8.1)

Enter menu 2 from the Remote Control as described in section 5, and make the following settings: MENU PROGRAMME ROW PARAMETER VALUE TO SET DESCRIPTIONCONFIGURATION5715 Heating circuit 2 On Heating circuit 2 enable5977 H5 input functionRoom thermostat CH2 Circuit 2 thermostat enable(terminal block M1 (1-2) on boiler)6020 Extension module 1 functionTemps / mode CH1 Low temperature zone enable Function of H2 input on module 1Room thermostat CH1 H2 input enabled as low temperature zone room thermostatHEATING CIRCUIT 1710 Comfort temperature 35°C Room setpoint (low temperature zone)HEATING CIRCUIT 1 834 Actuator stroke time: Default 180 s Mixing valve close time Set the comfort temperature to it maximum value (35°C) 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 ow temperature. The heating circuit operates with a xed ow. Connect the thermostat protecting the low temperature zone in series to the feed of the zone electrovalves so as to totally close the circuit in case of fault.7104900.03 (1-11/13) 26 INSTALLER Section (EN)

Low - heating circuit (1) and high temperature - heating circuit (2) zones with room thermostat 1 External sensor - terminal block M2 (4-5) on the boiler2 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 (connect in series to the zone pump, see chap. 8.3)6 Low temperature zone room thermostat input (12V) (H2-M)7 Electrovalve or externally powered high temperature zone pump8 High temperature zone ambient thermostat (for connection see chapter 8.1)

If it is not necessary to manage mixed systems, the AGU 2.550 accessory can be used to command zone pumps/electrovalves, as illustrated below: The diagrams in this document are purely indicative and must be backed by a technical thermal analysis.

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) on the 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 8.1) 4 Circuit 2 zone pump or electrovalve (QX22-N)*

• The AGU 2.550 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 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 5, and make the following settings: MENU PROGRAMME ROW

Three zones with room unit (heating circuits 1, 2 and 3) 1 External sensor - terminal block M2 (4-5) on the boiler 5 Circuit 2 ambient unit - terminal block M2 (1-2-3) of boiler 2 Circuit 1 zone pump or electrovalve (QX21-N)* 6 Circuit 3 zone pump or electrovalve (QX23-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

• The AGU 2.550 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 5, and make the following settings: MENU PROGRAMME ROW

The operating temperature is the same for all circuits. The relays can be replaced with valves equipped with micro limit switches and vice versa.

8.1 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).

8.2 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).

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

Connect the ambient thermostats in parallel to the external elec-tric network (230V) which will supply the zone valves (or pumps) and the relay coil; connect the relay contact to the AGU 2.550 H2-M terminal blocks. Connect the thermostat protecting the low temperature zone in series to the feed of the zone electrovalves so as to totally close the circuit in case of fault.

8.4 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 AGU 2.550 H2-M terminal blocks.

Connect the thermostat protecting the low temperature zone in series to the feed of the zone electrovalves so as to totally close the circuit in case of fault.

In this conguration, the AGU 2.550 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 sensor B6 (BX21-M) 4 storage boiler sensor B3 - terminal block M2 (9-10) on boiler

The diagrams in this document are purely indicative and must be backed by a technical thermal analysis. Enter menu 2 from the Remote Control, as described in section 5, and make the following settings: MENU PROGRAMME ROW VALUE TO SET DESCRIPTION CONFIGURATION 6020 Solar DHW Solar function enable31 INSTALLER Section (EN) 7104900.03 (1-11/13) The following parameters can be used. If solar panels with vacuum tubes are used, enable the specic safety function (parameters 3830, 3831): MENU PROGRAMME ROW

VALUE TO SET DESCRIPTIONCONFIGURATION

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.

Off: the boiler lights when the room temperature is < 6°CTimed: the room temperature depends on the set time band Reduced: the room temperature is reducedOn: 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

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

Flow temperature with room unit ( --- = modulating ow enable) °C 80 Minimum setpoint Maximum setpoint

Importance of room temperature with respect to the external temperature and vice-versa (room inuence 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 ow temperature of dry screed function °C - - - 856 1156 1456 Day of the week during activation of dry screed function - - - - CR = Heating Circuit7104900.03 (1-11/13) 32 INSTALLER Section (EN)

Factory setting Minimum Maximum

Operating mode Off = setpoint equal to anti-freeze setpoint On = rated setpoint Eco = pre-heating disabled

Anti-legionellosis function operating mode: Off Periodically Fixed weekday - off - -

Multifunctional: the inputs and outputs can be congured manually Heating circuit 1, 2 or 3: manages a mixed zone (1, 2 or 3 - chapter 6) Return temp. contr.: not used DHW solar: manages a solar plant with 2 sensors and pump (section 8) Prim/syst. pump contr.: not used

6030…6038 See section 10 - 6040…6045 See section 10 - 6046…6068 See section 10 - 6097 Type of sensor used for solar manifold PT 1000 6200 Saving of all the sensors connected in the boiler and accessories (section 5.2) - 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 10) no 6800 Last error - 6805 Internal code of last error - 6806 Burner phase of last error - from 6810 to 6996 Error log - The illustrated congurations also apply to the other board relays/sensors/inputs, such as relay QX1 (row 5890) or sensors BX2 (row 5931) and BX3 (row 5932).33 INSTALLER Section (EN) 7104900.03 (1-11/13)

11. SUNDRY FUNCTIONS

As well as the above settings, the inputs and outputs can also be congured 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 DESCRIPTIONCONFIGURATION6020 Extension module 1 function Multifunctional Solar function enable

11.1 DHW RECIRCULATION PUMP

If a storage boiler is used in the DHW circuit, the circulation pump can be controlled. This function is limited by the hourly program- ming 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 Remote Control, as described in section 5: MENU PROGRAMME ROW VALUE TO SET DESCRIPTIONCONFIGURATION 6030 Circulating pump Q4 DHW recirculation pump enable (relay QX21 output) 6040 HW circulation sensor B39 DHW recirculation sensor enable (sensor BX21) TEMPS / MODE HOT WATER1663 factory setting = 45°CDHW temperature below which the pump is enabled (recirculation setpoint)

11.2 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

The diagrams in this document are purely indicative and must be backed by a technical thermal analysis. Congure the system as described in section 8. At this point the DHW system is congured to use solar panels. Enter menu 2 from the Remote Control, as described in section 5: 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 oat 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.7104900.03 (1-11/13) 34 INSTALLER Section (EN)

11.3 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 conguration procedure. Enter menu 2 from the Remote Control, as described in

Further congurations 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 rell K34 Boiler automatic lling 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 ow switch Boiler ow 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 Conguration menu of the Remote Control:

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 BSB, address conict 2 or more room units congured for the same heating circuit 98 Additional module 1 AGU 2.550 accessory not detected or recognised 99 Additional module 2 AGU 2.550 accessory not detected or recognised 373 Additional module 3 AGU 2.550 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 congured 336 BX22 no function BX22 sensor not congured 324 BX same sensors Two or more sensors congured 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

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 mm