Westen NOVADENS BOYLER 240 User manual

Centrală murală pe gaz cu condensare i acumulare rapidă
Manual de instrucţiuni destinat utilizatorului i instalatorului
RO
0085
Gyorsan feltöltődő kondenzációs fali gázkazánok
Felhasználói és szerelői kézikönyv
HU
Настенный конденсационный газовый котел с быстродействующим аккумулятором
Руководство по эксплуатации для пользователя и установщика
RU
Gas-red wall-mounted condensation boiler with rapid storage boiler
Instructions manual for users and tters
GB
λέβητα αερίου επίτοιχη εγκατάσταση ε ταχεία συσσώρευση
εγχειρίδιο χρήση προοριζόενο για το χρήστη και τον εγκαταστάτη
EL

2926.091.1 - GB
INSTRUCTIONS FOR USERS
Dear Customer,
We are condent your new boiler will meet all your requirements.
All WESTEN 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 boiler correctly and eciently.
Do not leave any packaging (plastic bags, polystyrene, etc.) within the reach of children as they are a potential source of danger.
WESTEN S.p.A. declares that these models of boiler bear the CE mark in compliance with the
basic requirements of the following Directives:
- Gas Directive 90/396/EEC
- Eciency Directive 92/42/EEC
- Electromagnetic Compatibility Directive 2004/108/EEC
- Low Voltage Directive 2006/95/EC
1. Instructions prior to installation 3
2. Instructions prior to commissioning 3
3. Commissioning the boiler 4
4. Filling the system 10
5. Turning o the boiler 10
6. Prolonged shutdown. Frost protection 10
7. Gas conversion 10
8. Routine maintenance instructions 10
9. General precautions 11
10. Instructions prior to installation 11
11. Boiler installation 12
12. Dimensions of boiler 12
13. Contents of pack 13
14. Installation of ue and air ducts 13
15. Connecting the mains supply 17
16. Gas conversion methods 22
17. Setting boiler parameters 24
18. Adjustment and safety devices 25
19. Positioning the ignition and ame-sensor electrode 26
20. Checking combustion parameters 26
21. Enabling the ue cleaner function 27
22. Output/pump head performance 27
23. Draining the storage boiler 27
24. DHW expansion vessel (available on request) 28
25. Annual service 28
26. Circuit diagram 29
27. Illustrated wiring diagram 30
28. Technical specications 31
CONTENTS
INSTRUCTIONS FOR USERS
INSTRUCTIONS FOR FITTERS
UNI EN ISO 9001
CERTIFICAZIONE DEI SISTEMI
QUALITA' DELLE AZIENDE
WESTEN S.p.a., a leading European manufacturer of central heating and hot water appliances for domestic use (wall-
hung gas boilers, oor-standing boilers and electric water heaters) has obtained CSQ certication of conformity to UNI
EN ISO 9001 standards. is certicate guarantees that the Quality System applied at WESTEN s.p.a. in Bassano del
Grappa, Italy, where this boiler was produced, meets all the requirements of UNI EN ISO 9001 standards and covers
all the organisational stages and operating personnel involved in the production and distribution process.

3926.091.1 - GB
INSTRUCTIONS FOR USERS
is boiler has been designed to heat water to a temperature lower than boiling point at atmospheric pressure. It must be connected to
a central heating system that is compatible with its performance and power levels.
Before having the boiler installed by a qualied service engineer, make sure the following operations are performed:
a) Make sure that the boiler is adjusted to use the type of gas delivered by the gas supply. To do this, check the markings on the packaging
and the rating plate on the appliance.
b) Make sure that the ue terminal dra is appropriate, that the terminal is not obstructed and that no exhaust gases from other appliances
are expelled through the same ue duct, unless the latter has been specially designed to collect exhaust gas from more than one
appliance, in compliance with current laws and regulations.
c) Make sure that, if the boiler is connected to existing ue ducts, these have been thoroughly cleaned as residual products of combustion
may detach from the walls during operation and obstruct the ow of fumes.
d) To ensure correct operation and maintain the warranty, observe the following precautions:
1. DHW circuit:
1.1. If the water is harder than 20 °F (1 °F = 10 mg calcium carbonate per litre of water), install a polyphosphate dispenser or an
equivalent treatment system, compliant with current regulations.
1.2. oroughly ush the system aer installation of the appliance and before use.
2. Heating circuit
2.1. new system
Before proceeding with installation of the boiler, the system must be cleaned and ushed to eliminate residual thread-cutting
swarf, solder and any solvents, using suitable proprietary products. To avoid damaging metal, plastic and rubber parts, only use
neutral cleaners, i.e. non-acid and non alkaline. Recommended cleaning products are:
SENTINEL X300 or X400 and FERNOX Regenerator for heating circuits. Use these products in strict compliance with the
manufacturers’ instructions.
2.2. existing system:
Before installing the boiler, drain the system and clean it to remove sludge and contaminants, using suitable proprietary products
as described in section 2.1.
To avoid damaging metal, plastic and rubber parts, use only neutral cleaners, i.e. non-acid and non-alkaline such as
SENTINEL X100 and FERNOX Protector for heating circuits. Use these products in strict compliance with the manufacturers’
instructions.
Remember that the presence of foreign bodies in the heating system can adversely aect boiler operation (e.g. overheating and
excessive noise of the heat exchanger).
Failure to observe the above will render the guarantee null and void.
1. INSTRUCTIONS PRIOR TO INSTALLATION
Initial lighting of the boiler must be carried out by an authorised Service Engineer who must rst ensure that:
a) the rated data correspond to the supply (electricity, water and gas) data;
b) the installation complies with current laws and regulations;
c) the appliance is correctly connected to the power supply and earthed.
e names of the authorised Service Centres are indicated in the attached sheet.
Failure to observe the above will render the guarantee null and void.
Prior to commissioning, remove the protective plastic coating from the boiler. Do not use any tools or abrasive detergents to do this as
you may damage the painted surfaces.
2. INSTRUCTIONS PRIOR TO COMMISSIONING

4926.091.1 - GB
INSTRUCTIONS FOR USERS
3. COMMISSIONING THE BOILER
To light the boiler correctly, proceed as follows:
• Power the boiler.
• Open the gas tap;
• follow the instructions below concerning the adjustments to make on the boiler control panel.
Figure 1
0510_2801
1
2
3
5 6 7 8
9
10
b
a
KEY TO BUTTONS KEY TO SYMBOLS ON DISPLAY
Heating mode button
Information display button
Parameter adjustment button (increase)
Parameter adjustment button (decrease)
Programme access and scrolling button
Programme access and scrolling button
Reset button
Domestic hot water temperature adjustment
button
Heating water temperature adjustment button
DHW on/o button
Resettable fault
Main display
Secondary display
Flame present (burner on)
Outside temperature
Standby (o)
Manual operation at reduced temperature
Manual operation at maximum set temperature
Automatic operation
Operation in the heating mode
Operation in the DHW mode

5926.091.1 - GB
INSTRUCTIONS FOR USERS
3.1 DESCRIPTION OF BUTTONS
(2) Press this button to set the heating water delivery temperature as described in paragraph 3-3.
(3) Press this button to set the DHW temperature as described in paragraph 3-4.
(10) Heating mode button.
Press to enable four boiler operating methods in the heating mode; these methods are identied by a black dash under the
corresponding symbol on the display, as described below:
020503_0800
Figure 2
Dash
“Automatic mode”
active
a) Automatic operation. Boiler operation depends on hourly programming, as described in paragraph 3-5.1: “Hourly
heating programming”;
b) manual operation at maximum set temperature. e boiler lights up regardless of the set hourly programme. e
operating temperature is set using the button (paragraph 3-3 : “Adjusting maximum heating temperature”;
c) manual operation at reduced temperature. e operating temperature is set as described in paragraph 3-6: “adjusting
reduced heating temperature”.
Moving manually from positions a) and b) to position c) involves switching o the boiler and stopping the pump aer
the post-circulation time (factory set to 3 minutes).
d) standby. e boiler does not operate in the heating mode. e antifreeze function remains enabled.
(1) DHW on/o button. A Press this button to enable or disable this function which is identied by two black dashes under
the symbol on the display.
(4) Reset button. In case of a fault, as detailed in paragraph 3-7 “Boiler fault signals and resetting”, reset by pressing this button
for at least two seconds.
“E153” appears on the display if this button is pressed when no fault is present. Press this button again (for at least two second)
to resume operation.
(9) Information button. Press this button in sequence to display the following information:
- temperature (°C) of DHW ( );
- Outside temperature (°C) ( ); only works if the external probe is connected.
Press one of the two buttons to exit and return to the main menu.

6926.091.1 - GB
INSTRUCTIONS FOR USERS
3.2 SETTING THE TIME
3.3 ADJUSTING MAXIMUM HEATING TEMPERATURE
- Press (2- gure 1) to set the heating water temperature;
- press to set the required temperature;
- press one of the two buttons (1 or 10 - gure 1) to save and return to the main menu.
NOTE  With the external probe connected, press (2 – gure 1) to shi the heating curve. Press to decrease or increase
the ambient temperature of the room to heat.
- Press (3- gure 1) to set the maximum DHW water temperature;
- press to set the required temperature;
- press one of the two buttons (1 or 10 - gure 1) to save and return to the main menu.
3.4 ADJUSTING DHW TEMPERATURE
a) Press one of the two buttons to enter the programming function; the letter P appears on the display followed by a number
(programme line);
020503_0700
Figure 3
b) press buttons until P1 relative to the time appears;
c) press buttons to adjust the time. e letter P will start ashing on the display;
d) press button to save and exit the programming mode;
3-5.1 – Hourly heating programming
- Press one of the two buttons to enter the programming function;
a) press these buttons until P11, relative to the programme start time, appears;
b) press buttons to adjust the time;
- press , P12, relative to the programme end time, appears on the display;
- repeat the operations described in points aand bup to the third and last cycle (programme line P16);
- press to save and exit the programming mode.
3-5.2 - Hourly DHW programming.
- When the appliance leaves the factory, the DHW mode is always set, while the DHW programming mode is disabled.
is programme is enabled as described in chapter 17 for tters (parameter H91).
When enabling, set the programme lines from 31 to 36 as described in paragraph 3-5.1.
3.5 SETTING THE DAILY HEATING AND DHW OPERATING PROGRAMME

7926.091.1 - GB
INSTRUCTIONS FOR USERS
3.6 ADJUSTING REDUCED HEATING TEMPERATURE
- press one of the two buttons to enter the programming function;
- press them until P5, relative to the temperature setting, appears;
- press to set the required temperature.
is mode is active when the reduced heating mode is enabled or when daily programming requires no heat.
NOTE  With the external probe connected, the minimum ambient temperature of the room requiring heating can be set using
parameter P5.
range
0…23:59
25..80
00:00…24:00
00:00…24:00
00:00…24:00
00:00…24:00
00:00…24:00
00:00…24:00
00:00…24:00
00:00…24:00
00:00…24:00
00:00…24:00
00:00…24:00
00:00…24:00
0...1
factory
setting
———-
25
6:00
22:00
0:00
0:00
0:00
0:00
0:00
24:00
0:00
0:00
0:00
0:00
0
description of parameter
Set the time of day
Set reduced temperature in the heating mode (°C)
Start of phase one of the daily automatic heating programme
End of phase one of the daily automatic heating programme
Start of phase two of the daily automatic heating programme
End of phase two of the daily automatic heating programme
Start of phase three of the daily automatic heating programme
End of phase three of the daily automatic heating programme
Start of phase one of the daily DHW programme (*)
End of phase one of the daily DHW programme (*)
Start of phase two of the daily DHW programme (*)
End of phase two of the daily DHW programme (*)
Start of phase three of the daily DHW programme (*)
End of phase three of the daily DHW programme (*)
Reset daily heating and DHW programmes (factory settings).
Press - + together for about 3 seconds. e number 1 appears on the display. Conrm
by pressing one of the two buttons .
parameter
n°
P1
P5
P11
P12
P13
P14
P15
P16
P31
P32
P33
P34
P35
P36
P45
(*) Parameters P31 to P36 only appear if DHW programming has been enabled, as described in chapter 17 for the tter (parameter
H91).
3.7 TABLE OF USER SETTABLE PARAMETERS

8926.091.1 - GB
INSTRUCTIONS FOR USERS
3.8 FAULT SIGNALS AND BOILER RESET
If a fault develops, a signal code ashes on the display.
e fault signals appear on the main display (gure 1 a) together with the symbol (gure 4).
To reset, press the reset button for at least two seconds.
020503_0500
Figure 4
0510_2001
Figure 4.1
e fault signals and the time ash alternately (gure 4.1) on the secondary display (gure 1 b). It is not possible to reset the fault signals
appearing on the secondary display as the reason for the signal must rst be eliminated.

9926.091.1 - GB
INSTRUCTIONS FOR USERS
3.9 SUMMARY OF SIGNALS AND FAULTS
All the faults are displayed in order of importance; if more than one fault occurs at the same time, the rst to be displayed is the one with
higher priority. Aer eliminating the reasons for the rst fault, the second will be displayed, and so on.
If a certain fault occurs frequently, contact the Authorised Service Centre.
corrective action
Call the Authorised Service Centre.
Call the Authorised Service Centre.
Call the Authorised Service Centre.
Press the reset button (approx. 2 seconds). If this fault persists, call the
Authorised Service Centre.
Call the Authorised Service Centre.
Call the Authorised Service Centre.
Call the Authorised Service Centre.
Press the reset button (approx. 2 seconds). If this fault persists, call the
Authorised Service Centre.
Press the reset button if appears on the display, otherwise switch o the
boiler for 10 seconds. If this fault persists, call the Authorised Service Centre.
Check the position of the ignition electrodes (section 19).
Press the button again (about 2 seconds)
Press the reset button (about 2 seconds) and then again when E153 appears.
Call the Authorised Service Centre.
Check that the pressure in the system is correct; See section on lling the boiler.
If this fault persists, call the Authorised Service Centre.
description of fault
External probe sensor faulty
ntc delivery sensor faulty
ntc domestic hot water sensor faulty
safety or fumes thermostat tripped
no ame during operation (ionisation
current out of tolerance)
minimum fan speed out of tolerance
oor thermostat tripped
no gas
internal boiler card error
reset button pressed unnecessarily
internal boiler card error
fan speed threshold not reached
differential hydraulic pressure switch
block
Fault
code
E10
E20
E50
E110
E128
E129
E132
E133
E151
E153
E154
E160
E164

10 926.091.1 - GB
INSTRUCTIONS FOR USERS
IMPORTANT: Regularly check that the pressure displayed on the pressure gauge is 1 - 1.5 bar, with the boiler cold.
In case of overpressure, open the boiler drain valve. If pressure is lower, open the boiler lling tap (gure 5).
Open the tap very slowly in order to vent the air.
In case pressure drops occur frequently, have the boiler checked by an authorised Service Engineer.
4. FILLING THE SYSTEM
e boiler is tted with a dierential hydraulic pressure gauge which prevents the boiler from working if the pump is blocked or if there
is no water.
Figure 5
0806_0501 / 0210_1119
To turn o the boiler, disconnect the electric power supply.
5. TURNING OFF THE BOILER
Do not drain the whole system as lling up with water again causes unnecessary and harmful scale to build up inside the boiler and the
heating elements.
If the boiler is not used during winter and is therefore exposed to the danger of frost, add some specic anti-freeze to the water in the
system (e.g.: propylene glycol coupled with corrosion and scale inhibitors).
e electronic boiler management system includes a “frost protection” function which, when the delivery temperature falls below 5°C,
operates the burner until a delivery temperature of 30°C is reached.
e frost protection function is enabled if:
* the boiler is electrically powered;
* the gas tap is open;
* the system is at the correct pressure;
* the boiler is not blocked.
6. PROLONGED SHUTDOWN. FROST PROTECTION
7. GAS
e boilers can operate both on natural gas and LPG.
All gas conversions must be made by an authorised Service Engineer.
To keep the boiler ecient and safe, have it checked by the authorised Service Centre at the end of every operating period. Careful ser-
vicing ensures economical operation of the system.
Do not clean the outer casing of the appliance with abrasive, aggressive and/or easily ammable cleaners (e.g.: petrol, alcohol, and so on).
Always switch o the appliance before cleaning it (see section 5 Switching o the boiler).
8. ROUTINE MAINTENANCE INSTRUCTIONS
Boiler lling tap
Boiler drain tap
Storage boiler
drain tap

11 926.091.1 - GB
INSTRUCTIONS FOR FITTERS
is boiler has been designed to heat water to a temperature lower than boiling point at atmospheric pressure.
It must be connected to a central heating system and to a domestic hot water supply system according to its performance and power
output.
Do the following before connecting the boiler:
a) Make sure that the boiler is adjusted to use the type of gas delivered by the gas supply. To do this, check the markings on the packaging
and the rating plate on the appliance.
b) Make sure that the ue terminal dra is appropriate, that the terminal is not obstructed and that no exhaust gases from other appliances
are expelled through the same ue duct, unless the latter has been specially designed to collect exhaust gas from more than one
appliance, in compliance with current laws and regulations.
c) Make sure that, if the boiler is connected to existing ue ducts, these have been thoroughly cleaned as residual products of combustion
may detach from the walls during operation and obstruct the ow of fumes.
d) To ensure correct operation and maintain the warranty, observe the following precautions:
1. DHW circuit:
1.1. If the water is harder than 20 °F (1 °F = 10 mg calcium carbonate per litre of water), install a polyphosphate dispenser or an
equivalent treatment system, compliant with current regulations.
1.2. thoroughly ush the system aer installation of the appliance and before use.
2. Heating circuit
2.1. new system
Before proceeding with installation of the boiler, the system must be cleaned and ushed to eliminate residual thread-cutting
swarf, solder and any solvents, using suitable proprietary products. To avoid damaging metal, plastic and rubber parts, only use
neutral cleaners, i.e. non-acid and non alkaline. Recommended cleaning products are:
SENTINEL X300 or X400 and FERNOX Regenerator for heating circuits. Use these products in strict compliance with the
manufacturers’ instructions.
2.2. existing system:
Before installing the boiler, drain the system and clean it to remove sludge and contaminants, using suitable proprietary products
as described in section 2.1.
To avoid damaging metal, plastic and rubber parts, use only neutral cleaners, i.e. non-acid and non-alkaline such as
SENTINEL X100 and FERNOX Protector for heating circuits. Use these products in strict compliance with the manufacturers’
instructions.
Remember that the presence of foreign bodies in the heating system can adversely aect boiler operation (e.g. overheating and
excessive noise of the heat exchanger).
Failure to observe the above will render the guarantee null and void.
e following notes and instructions are addressed to tters to allow them to carry out trouble-free installation. Instructions for lighting
and using the boiler are contained in the ‘Instructions for Users’ section.
e Italian regulations governing installation, servicing and running of domestic gas-red systems are contained in the following
documents:
• UNI-CIG 7129-7131 and CEI 64-8 standards
Additionally, bear in mind the following:
• is boiler can be connected to any type of double- or single-pipe convector plate, radiator or thermoconvector. Design the system
sections as usual, though, bearing in mind the available ow-head at the plate, as shown in chapter 22.
Do not leave any packaging (plastic bags, polystyrene, etc.) within reach of children, as it is a potential source of danger.
• Initial lighting of the boiler must be carried out by an authorised Service Engineer, as indicated on the attached sheet.
Failure to observe the above will render the guarantee null and void.
9. GENERAL PRECAUTIONS
10. INSTRUCTIONS PRIOR TO INSTALLATION

12 926.091.1 - GB
INSTRUCTIONS FOR FITTERS
11. INSTALLING THE BOILER
Aer deciding the exact location of the boiler, x the template to the wall.
Connect the system to the gas and water inlets present on the lower bar of the template.
If you are either installing the boiler on an existing system or replacing one, t a settling tank under the boiler on the system return line
in order to collect any deposits and scale circulating in the system aer ushing.
Aer xing the boiler to the template, connect the ue and air ducts, supplied as accessories, as described in the following sections.
Connect the siphon to a drain trap, making sure the slope is continuous. Avoid horizontal stretches.
12. DIMENSIONS OF BOILER
Figure 6
1: G 1/2 DHW outlet
2: G 1/2 cold domestic water inlet
3: G 3/4 heating return
4: G 3/4 heating delivery
5: G 3/4 gas inlet to boiler
020418_1000
0510_0501
Figure 7
0210_1117

13 926.091.1 - GB
INSTRUCTIONS FOR FITTERS
13. CONTENTS OF PACK
14. INSTALLATION OF FLUE AND AIR DUCTS
• template
• gas tap (2)
• water supply tap (3)
• gaskets
• telescopic joints
• 8 mm rawplugs and supports
Figure 8 2
3
0210_1116
e boiler is easy and exible to install thanks to the extensive range of available
accessories, as described below. e boiler has been designed for connection to
a vertical or horizontal coaxial ue-air duct. A splitting kit is also available if
separate ducts are required.
If the ue and air ducts installed are not supplied by WESTEN S.p.A., make
sure they certied for the type of use and have a maximum pressure drop of
100 Pa.
Precautions for the following installation types:
C13, C33e terminals for separate ues must be tted inside a 50 cm square.
Detailed instructions are provided with the individual accessories
C53 Do not t the ue and air duct terminals on opposite walls of the
building.
C63 the pressure drop of the ducts must not exceed 100 Pa. e ducts must
be certied for this specic use and for a temperature in excess of 100°C.
e ue terminal must be certied to prEN 1856-1.
C43, C83 e ue terminal or ue duct must be suitable for the purpose.
0210_1115
Figure 9

14 926.091.1 - GB
INSTRUCTIONS FOR FITTERS
… coaxial ue-air duct (concentric)
990519_0400
concentric connector
Figure 10
is type of duct is used to discharge exhaust fumes and draw combustion air both
outside the building and if a LAS ue is tted.
e 90° coaxial bend allows the boiler to be connected to a ue-air duct in any
direction as it can be rotated by 360°. It can also be used as a supplementary curve
combined with a coaxial duct or a 45° curve.
If fumes are discharged outside the building, the ue-air duct must protrude at
least 18 mm from the wall to allow an aluminium weathering surround to be tted
and sealed to avoid water inltrations.
Make sure there is a minimum downward slope of 1 cm per metre of duct towards
the boiler.
a 90° bend reduces total duct length by 1 metre.
a 45° bend reduces total duct length by 0.5 metres.
14.1 Ø 60/100 HORIZONTAL FLUE TERMINAL INSTALLATION OPTIONS
0210_1114
14.2 Ø 60/100 MM LAS FLUE TERMINAL INSTALLATION OPTIONS
L max = 10 m
0210_1113

15 926.091.1 - GB
INSTRUCTIONS FOR FITTERS
14.3 Ø 60/100 VERTICAL FLUE TERMINAL INSTALLATION OPTIONS
is type of installation can be carried out on either a at or a pitched roof by tting a ue terminal and a special weathering surround
with sleeve (both available on request).
L max = 10 m L max = 10 m L max = 9 mL max = 8 m
0210_1112
… separate ue and air ducts
is type of installation makes it possible to discharge exhaust fumes both outside the building and into single ue ducts. Comburent
air can be drawn in at a dierent location from that of the ue terminal.
e splitting kit comprises a ue duct adaptor (100/80) and an air duct adaptor.
For the air duct adaptor, t the screws and seals previously removed from the cap.
0510_2802
e 90° curve allows the boiler to be connected to a ue-air duct in any direction as it can be rotated by 360°. It can also be used as a
supplementary curve combined with a duct or a 45° curve.
ue duct adaptor
air duct adaptor

16 926.091.1 - GB
INSTRUCTIONS FOR FITTERS
14.4 INSTALLATION OPTIONS WITH SEPARATE HORIZONTAL DUCTS
IMPORTANT Make sure there is a minimum downward slope of 1 cm per metre of duct towards the boiler.
Make sure the ue and air ducts are rmly xed to the wall with suitable brackets.
A 90° curve reduces total duct length by 0.5 metres.
A 45° curve reduces total duct length by 0.25 metres.
0509_0601/CG1361/1
(L1 + L2) max = 80 m
L max = 15 m
0210_1107
e maximum length of the air duct is
15 metres.
0210_1109

17 926.091.1 - GB
INSTRUCTIONS FOR FITTERS
14.5 INSTALLATION OPTIONS WITH SEPARATE VERTICAL DUCTS
15. ELECTRICAL CONNECTION
is machine is only electrically safe if it is correctly connected to an ecient earth system in compliance with current safety regula-
tions.
Connect the boiler to a 230V single-phase earthed power supply using the supplied three-pin cable, observing correct Live-Neutral
polarity.
Use a double-pole switch with a contact separation of at least 3 mm.
When replacing the power supply cable, t a harmonised HAR H05 VV-F’ 3x0.75mm2 cable with a maximum diameter of 8mm.
e 2A fast-blowing fuse is incorporated in the power supply terminal block (to check and/or replace the fuse, pull out the black fuse
carrier.)
IMPORTANT: if tting a single ue duct, make sure it is adequately insulated (e.g.: with glass wool) wherever the duct passes
through building walls.
For detailed installation instructions, consult the technical data provided with the accessories.
L max = 14 m
L max = 15 m
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Figure 11
0511_0902
Cover
Cover
Terminal block
Terminal block

18 926.091.1 - GB
INSTRUCTIONS FOR FITTERS
15.1 DESCRIPTION OF THE BOILER’S ELECTRICAL CONNECTIONS
Rotate the control box downwards and access terminal blocks M1 and M2, used for the electrical connections, by removing the two
safety covers (see gure 11).
Terminals 1-2 : connection to the SIEMENS model QAA73 climate controller, supplied as an accessory. It is not necessary to respect
the polarity of the connections.
Remove the jumper on terminals 3-4 “TA”.
Read the instructions provided with this accessory for correct installation and programming.
Terminals 3-4 “TA” ambient thermostat connection. Do not use thermostats with anticipatory resistors. Make sure the ends of the two
wires connecting the thermostat are not live.
Terminals 5-6: “TP” thermostat connection for underoor heating systems (available o the shelf). Make sure the ends of the two wires
connecting the thermostat are not live.
Terminals 7-8: for connecting the SIEMENS QAC34 external probe, supplied as an accessory. Read the instructions provided with this
accessory for correct installation.
Terminals 9-10: for connecting the DHW priority probe, supplied as an accessory, for connecting mono-thermal boilers to an external
storage boiler.
Terminals a-b (230V): electrical powering of a zone valve / pump
See instructions in the “connecting a zone system” chapter.
15.2 CONNECTING THE QAA73 CLIMATE CONTROLLER
Connect the SIEMENS model QAA73 climate controller (accessory available on request) to terminals 1-2 of the M2 terminal board in
gure 11.
Remove the jumper on terminals 3-4, tted to connect an ambient thermostat.
Use this device to adjust and programme the temperature of the DHW supply.
Set the heating programme on the QAA73 if just one zone is involved or when adjusting the zone controlled by the QAA73.
e hourly programme of the heating circuit of the other zones can be set directly on the boiler control panel.
For user settable parameters, see the instructions supplied with the QAA73 climate controller.
IMPORTANT: For zone systems, parameter 80 “HC2 gradient”, set on the QAA73 climate controller, must be set to —.- inacti-
ve.
- Qaa73: user settable parameters (service)
Press both the PROG buttons for at least 3 seconds to access the list of parameters that can be displayed and/or set by the tter.
Press one of these two buttons to change the parameter to view or modify.
Press [+] or [-] to modify the displayed parameter.
Press one of the PROG buttons to save.
Press the information button (i) to exit the programming mode.
e most commonly used parameters are indicated below

19 926.091.1 - GB
INSTRUCTIONS FOR FITTERS
line n°
70
72
74
75
77
78
79
80
90
91
Factory setting
15
85
Light
On HC1
Active
0
0
—.-
10
24 h/day
Range
2.5…40
25…85
Light, Heavy
on HC1
on HC2
on HC1+HC2
o
Inactive - active
0…360 min
0…360 min
2.5…40
—.- = inactive
10 or 35…58
24 h/day PROG
HC-1h PROG HC
PROG ACS
Parameter
HC1 gradient
Selection of climate curve “kt” of the heating circuit
HC1 Max Delivery
Maximum heating delivery temperature
Type of building
Environment oset
Enable / disable eect of ambient temperature. If disabled, the external
probe must be tted.
Automatic adaptation of “kt” climate curve according to ambient
temperature.
Max start optimisation
Maximum boiler start anticipation, with respect to the hourly
programme, for optimising room temperature.
Max stop optimisation
Maximum boiler stop anticipation, with respect to the hourly
programme, for optimising room temperature.
HC2 gradient
Reduced ACS setpoint
Minimum DHW temperature
ACS programme
Choice of the type of hourly DHW programme.
24 h/days = always active
PROG HC-1h = as per heating programme HC1 less 1 hour
PROG HC = as per heating programme
PROG ACS = specic DHW programme (see also
programme lines 30-36)
- fault signals
In case of faults ashes on the QAA73 display. Press the information button ( ) to display the error code and the description of the
fault (see the table in paragraph 3.9).

20 926.091.1 - GB
INSTRUCTIONS FOR FITTERS
15.3 CONNECTING THE EXTERNAL PROBE
Connect the SIEMENS model QAC34 external probe (accessory available on request) to terminals 7-8 of the M2 terminal board in
gure 11.
e method for setting the gradient of climate curve “kt” diers depending on the accessories connected to the boiler.
a) without accessories:
Select the “kt” by setting parameter H532 as described in chapter 17 “setting boiler parameters”.
See graph 1 to select a curve for a room temperature of 20°C.
To shi the selected curve, press (2) on the boiler control and modify the value by pressing and . To select the curve, see chart
2. (e example in chart 2 refers to curve Kt=15).
Increase the displayed value if the required ambient temperature is not reached inside the room.
b) with Qaa73 climate adjuster:
e climate curve “kt” must be chose by setting parameter 70 “HC1 gradient” of the QAA73 climate controller as described in chapter
15.2 “QAA73: parameters set by the tter (service)”.
See graph 3 to select a curve for a room temperature of 20°C.
e curve is automatically transferred depending on the room temperature set on the QAA73 climate controller.
For zone systems, the climate curve “kt”, relative to the part of the system not controlled by the QAA73, must be chosen by setting para-
meter H532 as described in chapter 17 “setting the boiler parameters”.
IMPORTANT: For zone systems, parameter 80 “HC2 gradient”, set on the QAA73 climate controller, must be set to —.- inactive
(see chapter 15.2).
Chart 1 Chart 2
TM = Delivery temperature
Te = Compounded external temperature
Sth = Kt curve
Chart 3
TM = Delivery temperature
Te = Compounded external temperature
0510_2803
0510_2804
TM
(°C) TM
(°C)
Te (°C) Te (°C)
TM
(°C)
Te (°C)