ACV Prestige 24 Solo User manual

A1004308 - 660Y2900- Volume 0 • B
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THE INSTALLER’S HANDBOOK FOR HEATING SYSTEMS
CONTROLLED WITH ACVMAX
Prestige 24 - 32 Solo /Excellence
Prestige 42 - 50 - 75 - 100 - 120 Solo
HeatMaster 25 C
HeatMaster 25 - 35 - 45 - 70 - 85 - 120 TC
WaterMaster 25 - 35 - 45 - 70 - 85 - 120
VOLUME 0
Introduction
Applicable to appliances manufactured from March 2016, equipped with at least software version (DSP) 3.05

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TABLE OF CONTENTS
VOLUME 0 - INTRODUCTION
RECOMMENDATIONS ................................................................................................. 0-3
Important instructions - read before proceeding........................................................................................................0-3
Applicability................................................................................................................................................................................0-3
USER'S GUIDE............................................................................................................... 0-4
How to use this manual..........................................................................................................................................................0-4
VOLUME 1 - ACVMAX MENUS AND FUNCTIONS
ACVMAX DESCRIPTION AND OPERATION .............................................................. 1-3
ACVMax Operating information .........................................................................................................................................1-3
Control panel description......................................................................................................................................................1-3
Home page description..........................................................................................................................................................1-3
Appliance Easy setup (EZ Setup).........................................................................................................................................1-4
Selecting the language ..........................................................................................................................................................1-4
Installer Code..............................................................................................................................................................................1-4
Installer menu structure......................................................................................................................................................... 1-5
Installer menu description.................................................................................................................................................... 1-5
ACVMAX PARAMETERS FOR THE SPECIALIST ....................................................... 1-23
List of Status Line Messages ...............................................................................................................................................1-23
Appliance codes......................................................................................................................................................................1-24
Factory settings and reset values.....................................................................................................................................1-24
ACVMax menu structure......................................................................................................................................................1-25
VOLUME 2 - SYSTEM DIAGRAMS AND ACVMAX SETUP
USER'S GUIDE............................................................................................................... 2-3
General..........................................................................................................................................................................................2-3
Resistance of the temperature sensors............................................................................................................................2-3
PRESTIGE SOLO/EXCEL (3-WAY VALVE) .................................................................... 2-4
Electrical Characteristics Prestige 24-32 Solo/Excellence........................................................................................2-4
Pumps (Prestige Solo/Excel (3-Way valve)).....................................................................................................................2-6
Preset Conguration 1............................................................................................................................................................ 2-7
Preset Conguration 2............................................................................................................................................................2-8
Preset Conguration 3............................................................................................................................................................2-9
Preset Conguration 4..........................................................................................................................................................2-10
PRESTIGE SOLO (2 PUMPS)........................................................................................2-11
Electrical Characteristics Prestige 42 - 50 - 75 Solo................................................................................................... 2-11
Electrical Characteristics Prestige 100-120 Solo ........................................................................................................ 2-11
Pumps (Prestige Solo) ...........................................................................................................................................................2-14
Preset Conguration 1..........................................................................................................................................................2-15
Preset Conguration 4..........................................................................................................................................................2-21
Preset Conguration 3..........................................................................................................................................................2-23
Preset Conguration 7..........................................................................................................................................................2-25
Preset Conguration 9..........................................................................................................................................................2-27
Preset Conguration 12........................................................................................................................................................2-28
HEATMASTER AND WATERMASTER....................................................................... 2-29
Electrical Characteristics HeatMaster®25-35-45 TC, HeatMaster®25 C and WaterMaster 25 - 35 - 45..2-29
Electrical Characteristics of HeatMaster®70-85 TC, WaterMaster 70 - 85.........................................................2-32
Electrical Characteristics of HeatMaster®120 TC, WaterMaster 120....................................................................2-32
Pumps (HeatMaster) ..............................................................................................................................................................2-34
Pumps (WaterMaster)............................................................................................................................................................2-34
HEATM ASTER ............................................................................................................ 2-35
Preset Conguration 16........................................................................................................................................................2-35
Preset Conguration 15........................................................................................................................................................2-37
Preset Conguration 15........................................................................................................................................................2-38
VOLUME 3 - CASCADE SYSTEMS
GENERAL INFORMATION........................................................................................... 3-3
User's Guide ................................................................................................................................................................................3-3
Operating Principles of an ACVMax-Controlled Cascade.........................................................................................3-3
MENUS AND SCREENS DESCRIPTION........................................................................ 3-4
Structure of the ACVMax cascade menu .......................................................................................................................3-10
INSTALLATION OF THE CASCADE BOILERS ............................................................3-11
General process for cascade installation....................................................................................................................... 3 -11
INSTALLATION AND CONFIGURATION OF CASCADE SYSTEMS ..........................3-12
Assembling the Cascade Mounting rack.......................................................................................................................3-12
Hydraulic connections of Cascade Systems .................................................................................................................3-14
Chimney connections of Cascade Systems ..................................................................................................................3-16
Cascade system connection (4-boiler Cascade).........................................................................................................3-18
Cascade start-up process.....................................................................................................................................................3-19
Accessing the Cascade Autodetection page ...............................................................................................................3-19
Preset Conguration 2..........................................................................................................................................................3-20
Preset Conguration 5..........................................................................................................................................................3-24
VOLUME 4 - CHIMNEY CONNECTIONS
CHIMNEY CONNECTION CHARACTERISTICS FOR PRESTIGE BOILERS................. 4-3
CALCULATION OF FLUE PIPE SYSTEM - PRESTIGE APPLIANCES............................. 4-4
Calculation of the Flue Pipe Length ..................................................................................................................................4-4
Prestige Solo Cascade : maximum length of ue pipes.............................................................................................4-5
CHIMNEY CONNECTION CHARACTERISTICS FOR HEATMASTER AND WATER-
MASTER APPLIANCES ................................................................................................. 4-6
CALCULATION OF FLUE PIPE SYSTEM - HEATMASTER AND WATERMASTER APPLI-
ANCES........................................................................................................................... 4-7
Calculation of the ue pipe length....................................................................................................................................4-7
HeatMAster/WaterMaster Cascade : maximum length of ue pipes ...................................................................4-8
VOLUME 5 - TROUBLESHOOTING
BLOCKAGE AND ERROR CODES ................................................................................ 5-3

NOTE
This manual contains important information with respect to the installation and set-up of the boiler.
This manual must be provided to the installer, who will keep it in a safe place.
We accept no liability should any damage result from the failure to comply with theinstructions
contained in this technical manual.
Essential recommendations for safety
• It is prohibited to carry out any modifications to the appliance without the
manufacturer’s prior and written agreement.
• The appliance must be set up by a qualified installer, in accordance with applicable
standards and regulations.
• The installation must comply with the instructions contained in the boiler's
installation manual and with the standards and regulations applicable to
installations.
• Failure to comply with the instructions in this manual could result in personal
injury or a risk of environmental pollution.
• The manufacturer declines all liability for any damage caused as a result of
incorrect installation or in the event of the use of appliances or accessories that are
not specified by the manufacturer.
Essential recommendations for the correct operation of the appliance
• To guarantee the correct operation of the installation, it is essential to carry out the
adjustments in accordance with the instructions in this manual.
• In order to ensure that the appliance operates correctly, it is essential to inspect
and service the boiler every year.
• Faulty parts may only be replaced by genuine factory parts.
General remark
• The manufacturer reserves the right to change the technical characteristics and
features of its products without prior notice.
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The Installer's Handbook - ACVMax: A1004308 - 660Y2900- Volume 0 • B
If you smell gas:
- Immediately isolate the gas supply.
- Open windows and doors to ventilate the area.
- Do not use any electrical appliances and do not operate any switches.
- Immediately notify your gas supplier and/or your installer.
IMPORTANT INSTRUCTIONS - READ BEFORE PROCEEDING
Essential recommendations for safety
• This document is intended to be used by a factory trained and qualified heating
contractor or service technician only. Read all instructions within this document and
within the concerned appliance's Installation, Operation and Maintenance Manual
before proceeding.
• It is recommended to follow the procedures in the steps given. Skipping or missing
procedural steps could result in severe personal injury, death or substantial property
damage.
• This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge, unless
supervised or unless they have been given instruction concerning the use of the
appliance by a person responsible for their safety.
• Children should be supervised to ensure that they do not play with the appliance.
RECOMMENDATIONS
APPLICABILITY
This manual is applicable to appliances manufactured from March 2016 and equipped with an ACVMax
controller running at least on software version 3.05.
To know the software version of the controller installed in your appliance, look at the
information displayed just after the ON/OFF master switch has been pushed in to turn the
appliance on.
• Software version 3.03 does not support the appliance coding function. Please refer to
the ACVMax System Control manual on the ACV website (ref. 660Y2800).

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USER'S GUIDE
HOW TO USE THIS MANUAL
The Installer's Handbook is for the exclusive use of ACV-approved installers.
The manual is comprised of 6 volumes, containing each all relevant information to set up a complete
system based on an appliance controlled with ACVMax.
Volume 0 - contains the general recommendations and an interactive table of contents for all the
volumes.
Volume 1 - gives a general description of the ACVMax, as well as a detailed description of all the
screens, menus and parameters, with the exception of the ACVMax menus (see Volume 3).
Volume 2 - presents typical hydraulic diagrams for dierent system congurations, as well as the
parameter settings for each conguration.
Volume 3 - provides all required information to set up a cascade system (Prestige Solo boilers only), i.e.
electrical connection, hydraulic connection, chimney connection and the Cascade start up
through the Cascade Autodetection function.
Volume 4 - gives information on the various chimney connections according to the selected chimney
type.
Volume 5 - contains the blockage and error codes displayed on the ACVMax screen, which will allow
the installer to troubleshoot the possible faults.
For any other heating system conguration than those in this manual, please contact your ACV repres
entative.

A1004308 - 660Y2900 - Volume 1 • B
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THE INSTALLER’S HANDBOOK FOR HEATING SYSTEMS
CONTROLLED WITH ACVMAX
VOLUME 1
ACVMax Menus and Functions
Prestige 24 - 32 Solo /Excellence
Prestige 42 - 50 - 75 - 100 - 120 Solo
HeatMaster 25 C
HeatMaster 25 - 35 - 45 - 70 - 85 - 120 TC
WaterMaster 25 - 35 - 45 - 70 - 85 - 120
Applicable to appliances manufactured from March 2016, equipped with at least software version (DSP) 3.05

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TABLE OF CONTENTS
VOLUME 1 - ACVMAX MENUS AND FUNCTIONS
ACVMAX DESCRIPTION AND OPERATION .............................................................. 1-3
ACVMax Operating information ......................................................................................................................................... 1-3
Control panel description......................................................................................................................................................1-3
Home page description..........................................................................................................................................................1-3
Appliance Easy setup (EZ Setup).........................................................................................................................................1-4
Selecting the language ..........................................................................................................................................................1-4
Installer Code..............................................................................................................................................................................1-4
Installer menu structure......................................................................................................................................................... 1-5
Installer menu description.................................................................................................................................................... 1-5
CH & DHW Seings ( ) -->> CH Seings ( )................................................................................................................................................................1-6
CH & DHW Seings ( )-->> DHW Seing ( ) .........................................................................................................................................................1-12
CH & DHW Seings ( ) -->> Boiler Seings ( ).....................................................................................................................................................1-16
Reset all seings ( )...............................................................................................................................................................................................................................1-21
Cascade Menu ( ) .............................................................................................................................................................................................................................1-21
Manual Operation ( ).......................................................................................................................................................................................................................... 1-22
ACVMAX PARAMETERS FOR THE SPECIALIST ....................................................... 1-23
List of Status Line Messages ...............................................................................................................................................1-23
Appliance codes......................................................................................................................................................................1-24
Factory settings and reset values.....................................................................................................................................1-24
ACVMax menu structure......................................................................................................................................................1-25

13
2
Boiler Protection
P3
DHW
P4
84°C
61°C
1
2
CH
Target = 85°C
HeatMaster
Radiator icon: indicates that a central
heating call has been received. A small
number 1 or 2 indicates which CH calls
are active.
Tap icon: indicates that a DHW call has
been received.
Circulator icons: indicate which circula-
tors are currently powered.
Status line : displays the current
operating state of the appliance.
See “List of Status Line Messages”.
Basic information. The user can tog-
gle the items using the LEFT and RIGHT
keys and view target, Supply, Return,
Domestic, Outdoor and System tem-
peratures.
The appliance type is indicated at the top of the screen. The type and model are
factory preset. This setting can be accessed through the installer menu (Boiler
settings > Appliance settings) and modied using an appliance code (e.g. in the
case of a gas conversion or an ACVMax board replacement).
Refer to “Appliance codes”
The appliance is represented in the centre of the Home Screen. Basic operating
information such as supply and return temperatures are displayed as well as cur-
rent burner status.
A ame symbol is displayed when the
unit is red. The ame size changes to
indicate the current ring rate.
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The Installer's Handbook - ACVMax: A1004308 - 660Y2900 - Volume 1 • B
ACVMAX DESCRIPTION AND OPERATION
CONTROL PANEL DESCRIPTION HOME PAGE DESCRIPTION
1. ACVMax LCD Display - It is the setup interface of the appliance and indicates the parameter values,
the error codes and the set-up status of the parameters. It displays a series of screens, each showing
information and/or icons. The main icons are detailed on the right.
2. Installer button - Allows the installer to access the menus of the ACVMax controller to set up the
system.
3. Arrow keys and OK key - To browse through the screens of the ACVMax controller, set up the appliance,
increase and decrease the displayed values and validate the selections and access the Easy set-up screens.
The OK key is also used to RESET the appliance after a blocking (following the instructions on the screen.
Main settings of ACVMAX Display
• Screen backlight - it will illuminate when any button is depressed, and remain illuminated for ve min-
utes.
• Screen contrast - it can be adjusted at the Home screen by pressing and holding the OK button, then
pressing and holding the LEFT button along with the OK button. Press the UP and DOWN button to
increase or decrease the contrast while holding the OK and LEFT buttons depressed. All buttons must
be released and the procedure performed again to switch between increasing and decreasing contrast.
Main Icons of ACVMax display
Central Heating - indicates information related to the CH circuit.
DHW - indicates information related to the Domestic Hot Water circuit.
Home - to go back to the main menu screen.
Back - to go back to the previous screen.
Pump - indicates a pump is operating.
Warm weather shutdown - displays on the home screen when the outdoor temperature reach-
es the Warm Weather Shutdown preset temperature.
ACVMAX OPERATING INFORMATION
The ACVMax system control is designed to be exible yet easy to use. It monitors and controls the appliance
to operate as eciently as possible. ACVMax monitors the appliance supply, return and ue gas temperatures
and operates the igniter, gas valve and blower. It uses this information to modulate the appliance ring rate
to maintain the required setpoint. ACVMax oers many advanced control options, which may be adjusted for
various applications to achieve optimum appliance eciency and operation:
• Two central / space heating (CH) call inputs with separate outdoor curves.
• A Domestic Hot Water (DHW) call input with optional priority.
• System temperature sensing and control with an optional system temperature sensor.
• A cascade function. It allows up to four Prestige Solo (2 pumps) boilers to operate together in a single heating system.
The Cascade feature is not applicable to HeatMaster boilers, as a HeatMaster cascade must
be controlled by an external controller. Refer to the HeatMaster Installation, Operation and
Maintenance manual.
• A Modbus interface for integrating with building management systems.
These advanced features are adjustable in the Installer Menu after entering an access code. Refer to "Installer
Code" for more details.

English
Français
Nederlands
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Deutsch
Boiler Protection
P3
DHW
P4
84°C
61°C
1
2
CH
Target = 85°C
EZ Setup
Heating EZ Setup
Display EZ Setup
Select Language
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ACVMAX DESCRIPTION AND OPERATION
INSTALLER CODE
SELECTING THE LANGUAGE
Through the use of the specic code "054", the installer can access various setup screens, in order to dene a
large set of parameters and adapt the operation of the ACVMax to the system conguration.
To navigate on the screen, use the UP, DOWN, LEFT and RIGHT keys, OK then the OK key to validate a
selection. To increase/decrease values, use the UP and DOWN keys. or LEFT and RIGHT, according
to the situation.
General remarks
• Entering the installer access code allows the installer to make adjustments for 30
minutes. After 30 minutes, the access code will need to be entered again to make any
adjustments.
• If the end user misuses the installer code to access installer-specific parameters and
makes changes that cause a system failure, any warranty claim will be void.
APPLIANCE EASY SETUP (EZ SETUP)
The main parameters of the appliance can be set up using the EZ (easy) setup function of the controller. The
EZ setup function allows the user/installer to quickly setup the appliance for immediate operation according
to the system conguration. Refer to the appliance "Installation, Operation and Maintenance Instructions".

Boiler Protection
P3
DHW
P4
84°C
61°C
1
2
CH
Target = 85°C
HeatMaster
ENTER ACCESS CODE
05[4]
CH Settings
CH & DHW Settings
Reset All Settings
Press OK
to restore factory settings,
any other button
to keep current settings.
Cascade Info.
?
Manual Operation
FAN
CH1
CH2
DHW
Released
O
O
O
Select a position using the LEFT
and RIGHT buttons, and increase
or decrease the digit value using
the UP and DOWN buttons.
1x
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The Installer's Handbook - ACVMax: A1004308 - 660Y2900 - Volume 1 • B
ACVMAX DESCRIPTION AND OPERATION
INSTALLER MENU STRUCTURE INSTALLER MENU DESCRIPTION
The installer Menu contains the following icons :
1. CH & DHW Settings – Allows the installer to adjust the appliances central/space heating and
domestic hot water settings for the application. For the detail of the menus, go to "CH & DHW Settings
( ) -->> CH Settings ( )".
2. Manual Operation – The burner and circulators can be manually enabled for testing. For a detail of
the menus, go to "Manual Operation ( )" .
3. Cascade Settings – Allows the installer to setup, adjust and monitor the Cascade System. For a
detail of the menus, go to "menus and screens description" in Volume 3.
3. Reset All Settings – Resets all CH, DHW, and Cascade Settings back to the default settings (for the
detail of the values, go to "Factory settings and reset values"). For a detail of the menus, go to "Reset
all settings ( )".
5. Home - to go back to the home page.
6. Back - to go back to the previous screen.
CH & DHW Settings
Reset All Settings Cascade Information
Manual Operation

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ACVMAX DESCRIPTION AND OPERATION
CH Settings
Heating Settings
Heating Operation Enabled
Demand Thermostat & Setpoint
CH maximum capacity 100%
Abs. Max. CH Setpoint 87°C
CH1 Max. Setpoint 82°C
CH1 Min. Setpoint 27°C
Heating Operation
Disabled
Enabled
Heating Settings
Heating Operation Enabled
Demand Thermostat & Outd. Curve
CH maximum capacity 100%
Abs. Max. CH Setpoint 87°C
CH1 Max. Setpoint 82°C
CH1 Min. Setpoint 27°C
Demand Type
Thermostat & Outd. Curve
Thermostat & Setpoint
Constant & Outdoor Curve
Constant & Setpoint
0-10 V Modulation Signal
The Heating Settings menu contains
settings related to central heating op-
eration. Each line contains a CH Setting
followed by its current value. Six CH Set-
tings are displayed on the screen at one
time.
Heating Operation allows the central heating function to be enabled and disabled.
Press the UP or DOWN buttons to select Enabled or Disabled then press the OK button to store the
setting.
Enabled - The Appliance will respond to a central heating call.
Disabled - The Appliance will not respond to a central heating call. The heating operation disabled
icon ( ) is displayed on the home screen when central heating operation has been
disabled.
When heating is disabled the frost protection will still be active.
Default: Enabled
To navigate on the screen, use the UP, DOWN,
LEFT and RIGHT keys, OK then the OK
key to validate a selection. To
increase/decrease values, use the UP and
DOWN or LEFT and RIGHT keys, according to
the situation
Demand Type allows the installer to select how a CH Demand is generated.
Press the UP or DOWN buttons to select the CH Demand Type then press the OK button to store the
setting.
Default: Thermostat and Outd. Curve
See detail of menu on next page.
CH & DHW Settings ( ) -->> CH Settings ( )
CH & DHW Settings
“Installer Code”

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The Installer's Handbook - ACVMax: A1004308 - 660Y2900 - Volume 1 • B
ACVMAX DESCRIPTION AND OPERATION
Demand Type screen menu
Thermostat & Outdoor Curve – A central heating call from a dry contact switch will enable the appliance and the setpoint will vary with the outdoor temperature
for central heating calls.
Thermostat & Setpoint - A central heating call from a dry contact switch will enable the appliance and the setpoint will be xed for central heating calls.
Constant & Outd. Curve - The appliance will maintain setpoint and the central heating circulators will be constantly enabled without an external call from a dry con-
tact switch. The central heating circulators will be disabled when the outdoor temperature exceeds the Warm Weather Shutdown Temperature setting. The setpoint
will vary with the outdoor temperature for central heating calls.
Constant & Setpoint - The appliance will maintain setpoint and the central heating circulators will be constantly enabled without an external call from a dry contact
switch. The central heating circulators will be disabled when the outdoor temperature exceeds the Warm Weather Shutdown Temperature setting. The setpoint will
be xed for central heating calls.
0 - 10V Modulation Signal - This option allows the appliance ring rate to be controlled by an external control system. Based on the control input voltage, the
appliance will start to operate for heat demand. The CH temperature is limited by the Absolute maximum temperature (87°C).
• 0 – 2V appliance is o.
• 2 – 10 V linear power increase from minimum to maximum output.
• 10 – 2 V linear power decrease from maximum to minimum output.
• 2 – 1 V appliance on minimum capacity.
• 1 - 0 V appliance o.
CH Settings
Heating Settings
Heating Operation Enabled
Demand Thermostat & Outd. Curve
CH maximum capacity 100%
Abs. Max. CH Setpoint 87°C
CH1 Max. Setpoint 82°C
CH1 Min. Setpoint 27°C
Demand Type
Thermostat & Outd. Curve
Thermostat & Setpoint
Constant & Outdoor Curve
Constant & Setpoint
0-10 V Modulation Signal
max
min
output
0 1 2 3 4 5 6 7 8 9 10
Voltage

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ACVMAX DESCRIPTION AND OPERATION
CH Settings
Heating Settings
Heating Operation Enabled
Demand Thermostat & Outd. Curve
CH maximum capacity 100%
Abs. Max. CH Setpoint 87°C
CH1 Max. Setpoint 82°C
CH1 Min. Setpoint 27°C
CH Maximum Capacity
100%
0% 100%
CH Maximum Capacity limits the maximum CH capacity. The appliance capacity can be dened by adjusting this value, 100% means Maximum
CH output, 0% means minimum CH output. It is therefore possible to adjust the CH capacity to the installation needs.
Example: when set to 60%, the real appliance capacity is the appliance minimum capacity plus 60% of the dierence between the maximum and
minimum capacity.
Press the LEFT or RIGHT buttons to adjust the CH Maximum Capacity, then press the OK button to store the setting.
Default: 100%
Absolute Max CH Setpoint limits the setpoint during a central heating call. This setting can be used to prevent a user from adjusting the central
heating setpoint or outdoor curve above a safe operating temperature in the EZ Setup Menu. A warning screen will be displayed in EZ Setup if the
user attempts to raise the setpoint above the Absolute Max CH Setpoint. The Absolute Max CH Setpoint will be displayed on the outdoor curve in EZ
Setup if the user selects an outdoor curve which goes above the Absolute Max CH Setpoint.
Press the LEFT or RIGHT buttons to adjust the Absolute Max CH Setpoint then press the OK button to store the setting.
Default: 87°C
CH1 Max. Setpoint is the maximum setpoint for a CH1 heating call when an
Outdoor Curve option is chosen in Demand Type. CH1 Maximum Setpoint is
the xed setpoint for a CH1 heating call when a Setpoint option is chosen in
Demand Type.
Press the LEFT or RIGHT buttons to adjust the CH1 Maximum Setpoint then
press the OK button to store the setting.
Default: 82°C
CH1 Min. Setpoint is the minimum setpoint for a CH1 heating call when an
Outdoor Curve option is chosen in Demand Type. This setting is not applicable
when a Setpoint option is chosen in Demand Type.
Press the LEFT or RIGHT buttons to adjust the CH1 Minimum Setpoint then
press the OK button to store the setting.
Default: 27°C
Heating Settings
Heating Operation Enabled
Demand Thermostat & Outd. Curve
CH Maximum Capacity 100%
Abs. Max CH Setpoint 87°C
CH1 Max. Setpoint 82°C
CH1 Min. Setpoint 27°C
Abs. Max
CH Setpoint
87°C
20°C 87°C
Heating Settings
Heating Operation Enabled
Demand Thermostat & Outd. Curve
CH Maximum Capactiy 100%
Abs. Max CH Setpoint 87°C
CH1 Max. Setpoint 82°C
CH1 Min. Setpoint 27°C
CH1 Max.
Setpoint
82°C
20°C 87°C
Heating Settings
Heating Operation Enabled
Demand Thermostat & Outd. Curve
CH Maximum Capacity 100%
Abs. Max CH Setpoint 87°C
CH1 Max. Setpoint 82°C
CH1 Min. Setpoint 27°C
CH1 Min.
Setpoint
27°C
15°C 87°C
27
18
82
CH1 (°C)
O.T. (°C)
-12

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The Installer's Handbook - ACVMax: A1004308 - 660Y2900 - Volume 1 • B
ACVMAX DESCRIPTION AND OPERATION
CH Settings
Heating Settings
Demand Thermostat & Out. Curve
CH Maximum Capacity 100%
Abs. Max CH Setpoint 87°C
CH1 Max. Setpoint 82°C
CH1 Min. Setpoint 27°C
Outdoor Curve Coldest Day -12°C
Outdoor Curve Coldest Day is the coldest outdoor design temperature of the heating system when an Outdoor Curve option is chosen in De-
mand Type. This setting is not applicable when a Setpoint option is chosen in Demand Type.
Press the LEFT or RIGHT buttons to adjust the Outdoor Curve Coldest Day then press the OK button to store the setting.
Default: -12°C
Outdoor Curve Warmest Day is the warmest outdoor design temperature of the heating system when an Outdoor Curve option is
chosen in Demand Type. This setting is not applicable when a Setpoint option is chosen in Demand Type.
Press the LEFT or RIGHT buttons to adjust the Outdoor Curve Warmest Day then press the OK button to store the setting.
Default: 18°C
CH2 Circuit allows the CH2 heating call to be enabled and disabled.
Press the UP or DOWN buttons to select Enabled or Disabled then press the OK button to store the setting.
Enabled – The appliance will respond to a CH2 heating call
Disabled – The appliance will not respond to a CH2 heating call
Default: Enabled
CH2 Maximum Setpoint is the maximum setpoint for a CH2 heating call when an Outdoor Curve option is chosen in Demand Type. CH2
Maximum Setpoint is the xed setpoint for a CH2 heating call when a Setpoint option is chosen in Demand Type.
Press the LEFT or RIGHT buttons to adjust the CH2 Maximum Setpoint then press the OK button to store the setting.
Default: 60°C
Outdoor Curve
Coldest Day
-12°C
-34°C 10°C
Heating Settings
CH Maximum Capacity 100%
Abs. Max. CH Setpoint 87°C
CH1 Max. Setpoint 82°C
CH1 Min. Setpoint 27°C
Outdoor Curve Coldest Day -12°C
Outdoor Curve Warmest Day 18°C
Outdoor Curve
Warmest Day
18°C
15°C 25°C
The temperatures of Outdoor Curve Coldest Day and Outdoor Curve Warmest Day are identical to those of CH1.
Heating Settings
Abs. Max CH Setpoint 87°C
CH1 Max. Setpoint 82°C
CH1 Min. Setpoint 27°C
Outdoor Curve Coldest Day -12°C
Outdoor Curve Warmest Day 18°C
CH2 Circuit Enabled
CH2 Circuit
Disabled
Enabled
Heating Settings
CH1 Max. Setpoint 82°C
CH1 Min. Setpoint 27°C
Outdoor Curve Coldest Day -12°C
Outdoor Curve Warmest Day 18°C
CH2 Circuit Enabled
CH2 Max. Setpoint 60°C
CH2 Max.
Setpoint
60°C
20°C 90°C

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ACVMAX DESCRIPTION AND OPERATION
CH Settings
Heating Settings
CH1 Min. Setpoint 27°C
Outdoor Curve Coldest Day -12°C
Outdoor Curve Warmest Day 18°C
CH2 Circuit Enabled
CH2 Max. Setpoint 60°C
CH2 Min. Setpoint 27°C
CH2 Min.
Setpoint
27°C
15°C 88°C
CH2 Minimum Setpoint is the minimum setpoint for a CH2 heating call when an Outdoor Curve option is chosen in Demand Type. This
setting is not applicable when a Setpoint option is chosen in Demand Type.
Press the LEFT or RIGHT buttons to adjust the CH2 Minimum Setpoint then press the OK button to store the setting.
Default: 27°C
CH Post Pump Time sets how long the central heating circulators will continue to operate at the completion of a heating call. Refer to
the relevant “Pumps”section of Volume 2, to know which pumps will continue to operate. Any call during the CH Post Pump Time will be
ignored until the post pump has completed. The CH Post Pump Time feature allows the heat remaining in the appliance at the comple-
tion of a call to be sent to the heating system, which will improve the overall eciency of the system.
Press the LEFT or RIGHT buttons to adjust the CH Post Pump Time then press the OK button to store the setting.
Default: 5 min
Warm Weather Shutdown allows to enter an optional outdoor temperature at which to disable the central heating function. The Appliance
will continue to respond to a domestic hot water call or a 0- 10V Modulation Signal when the outdoor temperature exceeds the Warm Weather
Shutdown Temperature setting.
Press the LEFT or RIGHT buttons to adjust theWarm Weather ShutdownTemperature then press the OK button to store the setting and complete
the Heating setting.
The Warm Weather Shutdown icon ( ) is displayed on the home screen when the outdoor temperature reaches the Warm Weather Shutdown
Temperature.
Default: OFF.
Circulation Pump Permanent allows the central heating circulators to be constantly enabled even without a central heating call. A domes-
tic hot water call will cause the circulators to be disabled during the domestic call as long as DHW Priority is enabled.
Press the UP or DOWN buttons to select Enabled or Disabled then press the OK button to store the setting.
• Enabled – The central heating circulators will be enabled for constant circulation without a central heating call.
• Disabled – The central heating circulators will only be enabled during a central heating call.
Default: Disabled
Heating Settings
Outdoor Curve Coldest Day -12°C
Outdoor Curve Warmest Day 18°C
CH2 Circuit Enabled
CH2 Max. Setpoint 60°C
CH2 Min. Setpoint 27°C
Warm Weather Shutdown O
Warm Weather Shutdown
O
O 25°C
Heating Settings
Outdoor Curve Warmest Day 18°C
CH2 Circuit Enabled
CH2 Max. Setpoint 60°C
CH2 Min. Setpoint 27°C
Warm Weather Shutdown O
Circulation Pump Perman. Disabled
Circulation Pump
Permanent
Disabled
Enabled
Heating Settings
CH2 Circuit Enabled
CH2 Max. Setpoint 60°C
CH2 Min. Setpoint 27°C
Warm Weather Shutdown O
Circulation Pump Perman. Disabled
CH Post Pump Time 5 min
CH Post
Pump Time
5 min
O 30 min

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The Installer's Handbook - ACVMax: A1004308 - 660Y2900 - Volume 1 • B
ACVMAX DESCRIPTION AND OPERATION
CH Settings
Heating Settings
CH2 Max. Setpoint 60°C
CH2 Min. Setpoint 27°C
Warm Weather Shutdown O
Circulation Pump Perman. Disabled
CH Post Pump Time 5 min
Freeze Protection Enabled
Freeze Protection
Enabled
Disabled
The Freeze Protection menu allows the feature to be enabled and disabled. The built-in frost protection mechanism activates the system pumps
as soon as the ow temperature [NTC1 probe] drops below 7°C. As soon as the ow temperature is at 5°C, the burner starts up until the ow tem-
perature rises above 15°C. The pumps continue to run for around 10 minutes.
Press the UP or DOWN buttons to select Enabled or Disabled then press the OK button to store the setting.
• Enabled – The Frost Protection feature protects the installation from freezing at a predetermined system ow temperature.
• Disabled – The Frost Protection feature is disabled. Only the pumps operate.
Default: Enabled
Parallel Shift allows the CH setpoint to be externally adjusted when a Constant option is chosen in Demand Type. When a Constant option
is chosen in Demand Type, continuous CH1 and CH2 heating calls are generated. Simultaneous CH1 and CH2 calls will result in the Appli-
ance operating at the highest CH1 or CH2 setpoint. The CH1 or CH2 Thermostat terminals with the highest setpoint will be used to adjust
the setpoint. If the Thermostat terminals with the highest setpoint are open, the CH setpoint will decrease by the Parallel Shift Value. If the
Thermostat terminals with the highest setpoint are closed, the CH setpoint will return to the highest CH1 or CH2 setpoint
Press the LEFT or RIGHT buttons to adjust the Parallel Shift Value then press the OK button to store the setting.
Default: 0°C
CH Call Blocking sets the minimum time between burner rings for central heating calls. At the completion of a burner ring, the CH Call
Blocking time will begin. The burner will not re again until after the CH Call Blocking time has elapsed. The CH Call Blocking time only
prevents the burner from ring, the central heating circulators will respond to a central heating call. This blocking time has no aect on
domestic hot water calls. The CH Call Blocking feature prevents short cycling of the burner and extends the life of the burner components.
Press the LEFT or RIGHT buttons to adjust the Parallel Shift Value then press the OK button to store the setting.
Default: 2 min.
Frost Protection Setpoint allows to dene the outside air temperature at which the anti-freeze function is activated (only available if an outdoor
temperature sensor is connected). The pumps are activated when the outside temperature drops below the threshold dened in this menu.
Press the LEFT or RIGHT buttons to adjust the Freeze temperature Setpoint then press the OK button to store the setting.
In order to enable the protection of the whole system against freezing, all the valves of the radiators and the convectors should be
completely open.
Default: -30°C
Heating Settings
CH2 Min. Setpoint 27°C
Warm Weather Shutdown O
Circulation Pump Perman. Disabled
CH Post Pump Time 5 min
Freeze Protection Enabled
Frost Protection Setpoint -30°C
Frost Protection
Setpoint
-30°C
-30°C 10°C
Heating Settings
Warm Weather Shutdown O
Circulation Pump Perman. Disabled
CH Post Pump Time 5 min
Freeze Protection Enabled
Frost Protection Setpoint -30°C
Parallel Shift 0°C
Parallel Shift Value
0°C
0°C 80°C
Heating Settings
Circulation Pump Perman. Disabled
CH Post Pump Time 5 min
Freeze Protection Enabled
Frost Protection Setpoint -30°C
Parallel Shift 0°C
CH Call Blocking 2 min
CH Call Blocking
2 min.
0 min. 30 min.

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ACVMAX DESCRIPTION AND OPERATION
CH & DHW Settings ( )-->> DHW Setting ( )
DHW Setting
DHW Setting
DHW Operation Enabled
Demand Thermostat
DHW Boiler Setpoint 75°C
DHW Setpoint 60°C
DHW on Dierential 3°C
DHW Storage Adder 15°C
DHW Operation
Disabled
Enabled
DHW Setting
DHW Operation Enabled
Demand Thermostat
DHW Boiler Setpoint 75°C
DHW Setpoint 60°C
DHW on Dierential 3°C
DHW Storage Adder 15°C
Demand Type
Sensor
Thermostat
The DHW Setting menu contains
settings related to domestic hot water
operation. Each line contains a DHW
Setting followed by its current value.
Six DHW Settings are displayed on the
screen at one time.
DHW Operation allows the domestic hot water function to be enabled and disabled.
Press the UP or DOWN buttons to select Enabled or Disabled then press the OK button to store the
setting.
• Enabled - The Appliance will respond to a domestic hot water call.
• Disabled - The Appliance will not respond to a domestic hot water call. The domestic hot water op-
eration disabled icon ( )is displayed on the home screen when domestic hot water
operation has been disabled.
DHW Operation default: Enabled
CH & DHW Settings
Demand Type allows the installer to select the type of device which will generate a domestic hot water
call.
Press the UP or DOWN buttons to select the DHW Demand Type then press the OK button to store the
setting.
The DHW Demand options are:
• Thermostat - A domestic hot water call from an aquastat or dry contact switch will enable the Ap-
pliance with a xed setpoint for a domestic hot water call.
• Sensor - This option requires the use of an Indirect Water Heater Sensor. The Appliance will monitor
the DHW storage temperature and generate a domestic hot water call when the temperature drops
below the DHW Storage Setpoint - DHW On Dierential.
To navigate on the screen, use the UP,
DOWN, LEFT and RIGHT keys, OK then
the OK key to validate a
selection. To increase/decrease values, use
the UP and DOWN keys, or LEFT and RIGHT,
according to the situation
“Installer Code”

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The Installer's Handbook - ACVMax: A1004308 - 660Y2900 - Volume 1 • B
ACVMAX DESCRIPTION AND OPERATION
DHW Setting
DHW Setting
DHW Operation Enabled
Demand Thermostat
DHW Boiler Setpoint 75°C
DHW Setpoint 60°C
DHW on Dierential 3°C
DHW Storage Adder 15°C
DHW Boiler Setpoint is the xed appliance setpoint temperature during a domestic hot water call when the Thermostat option is chosen
in Demand Type.
Press the LEFT or RIGHT buttons to adjust the DHW Boiler Setpoint then press the OK button to store the setting.
Default: 75°C
DHW Setpoint is the domestic hot water storage setpoint temperature when the Sensor option is chosen in Demand Type.
Press the LEFT or RIGHT buttons to adjust the DHW Setpoint then press the OK button to store the setting.
Default: 60°C
DHW On Dierential sets how far the DHW storage temperature must fall below the DHW Storage Setpoint to create a domestic hot
water call when the Sensor option is chosen in Demand Type. The domestic hot water call will end when the DHW storage temperature
rises above the DHW Storage Setpoint.
Press the LEFT or RIGHT buttons to adjust the DHW On Dierential then press the OK button to store the setting.
Default: 3°C
DHW Storage Adder is used to compute the appliance setpoint when the Sensor option is chosen in Demand Type. The appliance set-
point will be DHW Storage Setpoint + DHW Storage Adder for a domestic hot water call.
Press the LEFT or RIGHT buttons to adjust the DHW Storage Adder then press the OK button to store the setting.
Default: 15°C
DHW
Boiler Setpoint
75°C
35°C 87°C
DHW Setting
DHW Operation Enabled
Demand Sensor
DHW Boiler Setpoint 75°C
DHW Setpoint 60°C
DHW on Dierential 3°C
DHW Storage Adder 15°C
DHW Setpoint
60°C
20°C 75°C
DHW Setting
DHW Operation Enabled
Demand Sensor
DHW Boiler Setpoint 75°C
DHW Setpoint 60°C
DHW on Dierential 3°C
DHW Storage Adder 15°C
DHW On Dierential
3°C
2°C 10°C
The appliance setpoint is automatically set to the DHW Setpoint + DHW Storage adder when the Sensor option is chosen
in DHW demand
The DHW on differential setting greatly affects the production of domestic hot water. A low setting could result in a rapid
response to a domestic hot water call resulting in a potential scald hazard. It is strongly recommended that the installer use
a thermostatic mixing valve on the hot water outlet of the Indirect Water Heater. Failure to comply could result in severe
personal injury, death, or substantial property damage.
DHW Setting
DHW Operation Enabled
Demand Sensor
DHW Boiler Setpoint 75°C
DHW Setpoint 60°C
DHW on Dierential 3°C
DHW Storage Adder 15°C
DHW Storage Adder
15°C
5°C 30°C

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ACVMAX DESCRIPTION AND OPERATION
DHW Setting
DHW Setting
Demand Sensor
DHW Boiler Setpoint 75°C
DHW Setpoint 60°C
DHW on Dierential 3°C
DHW Storage Adder 15°C
DHW Post Pump Time 2 min
DHW Post Pump Time sets how long the domestic hot water circulator will continue to operate at the completion of a domestic hot water
call. Any call during the DHW Post Pump Time will be ignored until the post pump has completed. The DHW Post Pump feature allows the
heat remaining in the appliance at the completion of a call to be sent to the Indirect Water Heater, which will improve the overall eciency
of the system.
Press the LEFT or RIGHT buttons to adjust the DHW Post Pump Time then press the OK button to store the setting.
Default : 1 min.
DHW Priority Timeout allows the installer to enter an optional time limit that a domestic hot water call has priority over a central heating
call when DHW Priority is set to Enabled.
Press the LEFT or RIGHT buttons to adjust the DHW Priority Timeout then press the OK button to store the setting.
Default: O
DHW Priority allows the domestic hot water priority function to be enabled and disabled.
Press the UP or DOWN buttons to select Enabled or Disabled then press the OK button to store the setting.
• Enabled- Domestic hot water calls will have priority over a central heating call. The appliance setpoint will be set to the domestic hot water setpoint
during a domestic hot water call. The DHW circulator will be enabled and the heating circulators will be disabled during a domestic hot water call.
• Disabled - Domestic hot water calls will not have priority over a central heating call. The appliance setpoint will be set to the domestic
hot water setpoint when only a domestic hot water call is present. The appliance setpoint will be set to the highest setpoint when si-
multaneous domestic hot water and central heating calls are present. The DHW circulator will be enabled during a domestic hot water
call. The heating circulators will be enabled during a central heating call.
Default: Enabled
DHW Call Blocking sets the minimum time between burner rings for domestic hot water calls. At the completion of a burner ring, the DHW Call
Blocking time will begin. The burner will not re again until after the DHW Call Blocking time has elapsed. The DHW Call Blocking time only prevents
the burner from ring, the domestic hot water circulator will respond to a domestic hot water call. This blocking time has no aect on central heating
calls. The DHW Call Blocking feature prevents short cycling of the burner and extends the life of the burner components.
Press the LEFT or RIGHT buttons to adjust the DHW Call Blocking time then press the OK button to store the setting.
Default: 0 min.
DHW Post
Pump Time
2 min
O 30 min
DHW Setting
DHW Boiler Setpoint 75°C
DHW Setpoint 60°C
DHW on Dierential 3°C
DHW Storage Adder 15°C
DHW Post Pump Time 2 min
DHW Priority Timeout O
DHW Priority Timeout
O
O 120 min.
DHW Setting
DHW Setpoint 60°C
DHW on Dierential 3°C
DHW Storage Adder 15°C
DHW Post Pump Time 2 min
DHW Priority Timeout O
DHW Priority Enabled
DHW Priority
Enabled
Disabled
DHW Setting
DHW on Dierential 3°C
DHW Storage Adder 15°C
DHW Post Pump Time 2 min
DHW Priority Timeout O
DHW Priority Enabled
DHW Call Blocking 0 min
DHW Call
Blocking
0 min.
0 min. 30 min.
Simultaneous domestic hot water and central heating calls will result in the Appliance operating at the highest target
temperature when DHW Priority is set to disabled. The use of a mixing device on the lower temperature zones may be
required to protect the lower temperature zones from damage.

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The Installer's Handbook - ACVMax: A1004308 - 660Y2900 - Volume 1 • B
ACVMAX DESCRIPTION AND OPERATION
DHWTo CH Call Blocking sets the minimum time between a DHW burner ring and a CH burner ring. At the completion of a DHW burner ring, the
DHW to CH Call Blocking time will begin. The burner will not re again for a central heating call until after the DHWTo CH Call Blocking time has elapsed.
This feature only prevents the burner from ring, the central heating circulators will respond to a central heating call. This blocking time has no aect
on domestic hot water calls. The DHW To CH Call Blocking feature prevents the burner from ring when switching from a domestic hot water call to a
central heating call. This allows the remaining heat in the heat exchanger to be dissipated and potentially satisfy the central heating call.
Press the LEFT or RIGHT buttons to adjust the DHW To CH Call Blocking time then press the OK button to store the setting.
Default: 1 min.
The Antilegionella Function ensures that an Indirect Water Heater is heated at least once per week to prevent the growth of Legionella
bacteria.
Press the UP or DOWN buttons to select Enabled or Disabled then press the OK button to store the setting.
• Enabled- When the Thermostat option is chosen in Demand Type, a domestic hot water call is generated for 15 minutes once per week
to heat the Indirect Water Heater.
When the Sensor option is chosen in Demand Type, a domestic hot water call is generated until the DHW storage temperature reaches
60°C once per week. When the Sensor option is chosen in Demand Type, the weekly timer is reset whenever the DHW storage tem-
perature reaches 60°C to prevent unnecessary rings. This function will be active even if DHW Operation has been set to Disabled.
The appliance setpoint is at 80°C during the antilegionella cycle.
• Disabled - The Appliance will only re in DHW mode when a domestic hot water call is received.
Default: Enabled
The antilegionella function should only be enabled when an Indirect Water Heater is installed. Enabling the antilegionella
function without an Indirect Water Heater will result in the Appliance firing once per week in DHW mode. This could cause
a Manual Reset Hard Lockout of the appliance.
The antilegionella function is most effective when the Sensor option is chosen in DHW demand. The use of an Indirect
Water Heater Sensor ensures that the domestic hot water is heated to 60°c at least once per week.
DHW Setting
DHW Setting
DHW Storage Adder 15°C
DHW Post Pump Time 2 min
DHW Priority Timeout O
DHW Priority Enabled
DHW Call Blocking 0 min
DHW to CH Call Blocking 1 min
DHW to CH
Call Blocking
1 min.
0 min. 30 min.
DHW Setting
DHW Post Pump Time 2 min
DHW Priority Timeout O
DHW Priority Enabled
DHW Call Blocking 0 min
DHW to CH Call Blocking 1 min
Antilegionella Function Enabled
Antilegionella Function
Enabled
Disabled

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ACVMAX DESCRIPTION AND OPERATION
Boiler Settings
Boiler Settings
Model Solo (2 pumps)
Lockout Temp. 221°F [105°C]
Modbus Address 1
Pump settings
Ignition Level 3100rpm
Mix zone high limit 45°C
Boiler Settings
Model Solo (2 pumps)
Lockout Temp. 221°F [105°C]
Modbus Address 1
Pump settings
Ignition Level 3100rpm
Mix zone high limit 45°C
Lockout Temp.
39°C / 102°F
221°F [105°C]
The Boiler Settings menu contains
settings related to appliance operation.
Each line contains an appliance setting
followed by its current value. Seven
settings are available.
The Model menu indicates the model and possibly type of appliance for which the system is set up.
CH & DHW Settings
The Lockout Temp. setting allows testing of the overheat thermostat function at a reduced temper-
ature. It temporarily decreases the overheat temperature of the appliance to 39°C which allows a safe
demonstration of the function.
Press the UP or DOWN buttons to scroll through the settings, then on OK to validate your selection.
Default: 105°C
This parameter sets the Modbus address of the appliance in a Modbus based communication system.
Press the LEFT or RIGHT buttons to adjust the settings, then on OK to validate your selection.
Default: 1
To navigate on the screen, use the UP,
DOWN, LEFT and RIGHT keys, OK then
the OK key to validate a
selection. To increase/decrease values, use
the UP and DOWN keys. or LEFT and RIGHT,
according to the situation
“Installer Code”
CH & DHW Settings ( ) - ->> Boiler Settings ( )
Boiler Settings
Model Solo (2 pumps)
Lockout Temp. 221°F [105°C]
Modbus Address 1
Pump settings
Ignition Level 3100rpm
Mix zone high limit 45°C
Modbus Address
1
0=BCST 247