ACV HeatMaster 201 Manual

A1004320 - 664Y7500 • A
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INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
for the Installer and the User
HeatMaster
201

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TABLE OF CONTENTS
GENERAL RECOMMENDATIONS....................................................................................3
Safety Instructions........................................................................................................................................................................3
USER’S GUIDE...................................................................................................................4
Meaning of Symbols ....................................................................................................................................................................4
Appliance Marking .......................................................................................................................................................................4
Control Panel and Display .........................................................................................................................................................5
Stand-by Screen ............................................................................................................................................................................6
Lockout Screen..............................................................................................................................................................................6
Status Messages............................................................................................................................................................................6
What to Check on a Regular Basis ..........................................................................................................................................7
In case of Problem........................................................................................................................................................................7
Setup Guide ....................................................................................................................................................................................7
APPLIANCE DESCRIPTION............................................................................................14
HeatMaster®201 .........................................................................................................................................................................14
Conguration in a system........................................................................................................................................................14
HeatMaster® 201 overview......................................................................................................................................................14
Connections - at the back and on the top........................................................................................................................15
AIR/GAS pre-mix burners ACV BG 2000-M/201..............................................................................................................16
TECHNICAL CHARACTERISTICS..................................................................................17
Dimensions ...................................................................................................................................................................................17
Clearance .......................................................................................................................................................................................17
Combustion characteristics....................................................................................................................................................18
Chimney connection characteristics...................................................................................................................................18
Gas categories..............................................................................................................................................................................19
Electrical Characteristics HeatMaster®201 ....................................................................................................................... 20
Hydraulic Characteristics ........................................................................................................................................................ 22
Hydraulic Pressure Drop Curve of the appliances......................................................................................................... 22
DHW performance .................................................................................................................................................................... 22
Maximum Operating Conditions......................................................................................................................................... 22
Recommendations for the Prevention of Corrosion and Scaling in Heating Systems.................................... 23
G3 Requirements and Guidance - UK Only.......................................................................................................................24
INSTALL ATION ..............................................................................................................26
Safety Instructions for the Installation .............................................................................................................................. 26
Package contents........................................................................................................................................................................27
Tools Required for the Installation.......................................................................................................................................27
Appliance preparation..............................................................................................................................................................27
Hydraulic Connections ............................................................................................................................................................ 28
DHW Connection....................................................................................................................................................................... 28
Removal and Installation of the Front Panel and the burner cover ....................................................................... 29
Gas connection........................................................................................................................................................................... 29
CONFIGURATION AND SYSTEM SETUP.....................................................................30
Basic Conguration - HeatMaster 201 : High Temperature Heating Circuit with Control by Room Ther-
mostat and Optional Outdoor Sensor............................................................................................................................... 30
STARTING UP ................................................................................................................. 31
Safety Instructions for Starting up.......................................................................................................................................31
Tools Required for Starting up...............................................................................................................................................31
Checks before Starting up.......................................................................................................................................................31
Filling the system........................................................................................................................................................................31
Starting up the appliance........................................................................................................................................................32
Checking and Adjusting the Burner....................................................................................................................................32
MAINTENANCE..............................................................................................................33
Safety Instructions for the Maintenance ...........................................................................................................................33
Tools Required for Maintenance...........................................................................................................................................33
Appliance shut down for Maintenance..............................................................................................................................33
Periodic Appliance Maintenance Tasks..............................................................................................................................33
Draining the Appliance ........................................................................................................................................................... 34
Removal and Installation of the Burner ............................................................................................................................ 34
Removal, Check and Installation of the Burner Electrode ..........................................................................................35
Restarting after Maintenance................................................................................................................................................35
LOCKING CODES ...........................................................................................................36
DECLARATION OF CONFORMITY...............................................................................40

NOTE
This manual contains important information with respect to the installation, the starting up and the
maintenance of the appliance.
This manual must be provided to the user, who will read it carefully and 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 product must be installed by a qualified engineer, in accordance with
applicable local standards and regulations.
• The installation must comply with the instructions contained in this manual and
with the standards and regulations applicable to heating systems.
• 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
• In order to ensure that the appliance operates correctly, it is essential to have it
serviced by a certified installer or maintenance contractor every year.
• In case of anomaly, please call your service engineer.
• Faulty parts may only be replaced by genuine factory parts.
General remarks
• The availability of certain models as well as their accessories may vary according to
markets.
• The manufacturer reserves the right to change the technical characteristics and
features of its products without prior notice. Please check for an updated version
of this manual in the documentation page on the website www.acv.com.
• In spite of the strict quality standards that ACV applies to its appliances during
production, inspection and transport, faults may occur. Please immediately notify
your approved installer of any faults.
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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.
GENERAL RECOMMENDATIONS
SAFETY INSTRUCTIONS
Essential recommendations for safety
• Do not store any flammable or corrosive products, paint, solvents, salts, chloride
products and other detergent products near the appliance.
• 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.
General remarks
• The end user is only allowed to carry out the basic set-up operations mentioned in "Setup
Guide" on page 7, after he has received all relevant instructions from the installer. Any
other set-up must be carried out by an approved installer.
• 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.
• To get additional information on how to use the ACVMAX interface, refer to the installer-
specific settings and the detailed error codes, in the "Installer's Handbook" available on
www.acv.com, under the "Documentation" tab, with your product manual(s).

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USER’S GUIDE
MEANING OF SYMBOLS Symbols in the
manual Meaning
Essential recommendation for safety (of persons and equipment)
Essential recommendation for electrical safety (electrical hazard)
Essential recommendation for the correct operation of the appliance or the
system
General remark
Safety valve connected to the sewage system
Connection to the sewage system
The part number (Code) and serial
number (N°) of the appliance are
indicated on its rating plate and must
be provided to ACV in case of warranty
claim. Failure to do so will make the
claim void.
APPLIANCE MARKING
Location: Back panel
Symbols on the
packaging Meaning
Fragile, handle with care
Keep away from rain
This way up
Danger of tipping over
Hand truck or pallet truck required for transport
Symbols on the
appliance Meaning
Gas connection
Domestic Hot Water circuit
Primary circuit
Connection to the sewage system
Electricity
Alarm
HeatMaster 201

1 5
243
Boiler Protection
P3
DHW
P4
84°C
61°C
1
2
CH
Target = 85°C
HeatMaster
Radiator icon: indicates that a cen-
tral 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 oper-
ating state of the appliance. See “Status
Messages” on page 7.
Basic information. The user can
toggle the items using the LEFT
and RIGHT keys and view target,
Supply, Return, Domestic, Out-
door and System temperatures.
The appliance type is indicated at the top of the screen. The type and model
are factory preset.
The appliance is represented in the centre of the Home Screen. Basic operat-
ing information such as supply and return temperatures are displayed as well
as current 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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USER’S GUIDE
CONTROL PANEL AND DISPLAY
Panel Description
1. Pressure gauge - Indicates the primary circuit pressure (min. 1 bar when cold).
2. ACVMAX LCD Display - It is the setup interface of the appliance and indicates the parameter val-
ues, 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.
3. Installer button - Allows the installer to access the menus of the ACVMAX controller to set up the
system.
4. 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 locking (follow the in-
structions on the screen).
5. ON/OFF master switch of the appliance - To turn the appliance ON and OFF.
Main settings of ACVMAX Display
• Screen backlight - it will illuminate when any button is depressed, and remain illuminated for ve
minutes.
• 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.
Typical items shown on the Home screen:
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.
Warm weather shutdown - displays on the home screen when the outdoor temperature
reaches the Warm Weather Shutdown preset temperature.
Reset - to reset the system to the factory settings.
Parameters - to access to the setup of controller parameters (language, units, etc.).
Easy setup - Indicates parameters that can be accessed through the EZ setup.
CH/DHW operation - To enable/disable the concerned circuit.
Information - To get information on the appliance.

Low Water
Water pressure has fallen below
0.7 bar. Increase pressure
to normal range.
If problem persists,
call for service
E37
Lockout reference code. Refer to “In case of Prob-
lem...” on page 7 for more information.
Body text. The rst sentence describes the lockout,
the second sentence gives a possible cure, and the
third tells how to reset the lockout.
Lockout message. Refer to “In case of Problem...”
on page 7 for more information.
Stand-by
84°C
61°C
Target = --
HeatMaster
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USER’S GUIDE
LOCKOUT SCREEN
If a problem occurs, the Lockout screen replaces the Home screen. The backlight also remains on as long
as the problem is not solved. Pressing any arrow button will return to the Home screen.
Using the code located in the right bottom corner of the screen, troubleshoot the problem, either with
the table located in paragraph “In case of Problem...” on page 7, or with the Lockout code table in the
Installer’s Handbook (for the installer only).
STANDBY SCREEN
This screen is displayed at start-up. It indicates that the appliance is ready to respond when a demand is
received.
STATUS MESSAGES
Stand-by Indicates that the appliance is ready to respond when a demand is received.
CH Demand A central heating call has been received.
DHW Demand A domestic hot water call has been received.
CH / DHW Demand Central heating and domestic hot water calls are being received simultaneous-
ly. Both calls are being satised simultaneously because domestic hot water
priority has been disabled.
DHW Priority Central heating and domestic hot water calls are being received simultaneous-
ly. Domestic hot water call is being satised rst because it has priority over
central heating calls.
Priority Timeout Central heating and domestic hot water calls are being received simultaneous-
ly. The domestic hot water priority time limit has been exceeded. Priority will
now switch back and forth between central heating and domestic hot water
calls until one call is satised.
External Demand An external modulation call has been received.
Manual Operation The burner or circulators have manually been enabled in the Installer Menu.
CH Burner Delay The burner will not re until the call blocking time has elapsed.
DHW Burner Delay The burner will not re until the call blocking time has elapsed.
CH Setpoint Reached The burner is not red because the supply/system water temperature exceeds
the setpoint. The central heating circulator continues to operate and the burner
will re again once the supply/system water temperature drops below the set-
point.
DHW Setpoint Reached The burner is not red because the supply/system water temperature exceeds
the setpoint. The domestic circulator continues to operate and the burner will
re again once the supply/system water temperature drops below the setpoint.
CH Post Pump The central heating circulator is running to remove heat from the HeatMaster at
the completion of a call.
DHW Post Pump The domestic hot water circulator is running to remove heat from the HeatMas-
ter at the completion of a call.
Freeze Protection The burner is red because the freeze protection feature has been activated.
Freeze protection will end once the supply/system water temperature is raised
to16°C.
Boiler Protection The burner ring rate is being reduced because of an excessive dierence be-
tween the appliance supply and return temperatures. The ring rate will begin
increasing once the temperature dierence is less than 25°C.
Lockout Description The lockout which currently has the HeatMaster shut down is displayed

* In case of complex systems, the setup must be performed by an approved installer using the Installer’s Handbook.
Boiler Protection
P3
DHW
P4
84°C
61°C
1
2
CH
Target = 85°C
HeatMaster EZ Setup
Heating EZ Setup
DHW EZ Setup EZ Setup Reset Display EZ Setup
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USER’S GUIDE
SETUP GUIDE
The main parameters of the HeatMaster boiler can be set up using the EZ (easy) setup function of the
ACVMax controller. The EZ setup function allows the user/installer to quickly set up the appliance for
immediate operation according to the system conguration*.
General remarks
• To navigate on the screen, use the UP, DOWN, LEFT and RIGHT keys, then the OK key
to validate a selection. A selection is marked by a black background under the selected
icon/text.
• To increase/decrease values, use the UP and DOWN keys or the LEFT and RIGHT keys
according to the situation.
WHAT TO CHECK ON A REGULAR BASIS
Essential recommendations for the correct operation of the appliance
ACV recommends to check the system at least every 6 months as follows:
• Check that the system water pressure is at least 1 bar when cold. If the pressure drops below
0.7 bar, the built-in pressure sensor blocks the appliance until the pressure exceeds 1.2 bar.
• If it is required to top up the system to maintain the minimum recommended water pressure,
always turn the appliance off and only add small amounts of water at a time. If a large amount
of cold water is added in a hot appliance, the appliance can be damaged definitively.
• If the system needs to be refilled repeatedly with water, please contact your installer.
• Check that there is no water on the floor under the appliance. If there is, please call your installer.
• Check regularly that there is no error message (lockout) on the screen. A typical lockout
screen is explained on the previous page. Refer also to the Troubleshooting table below
or call your installer as required.
IN CASE OF PROBLEM...
Check the list of faults and corresponding codes below to get the solution(s). If no solution is provided here,
please contact your installer who will determine the correct solution by referring to”Locking Codes” on page 36.
Fault
code Problem Possible Cause(s) Solution
-
The appliance does
not turn on when
pressing the ON/OFF
Master switch
No power supply
Check the power supply and that
the appliance power plug is con-
nected to the network.
E 01 Failed ignition The burner failed to light af-
ter 5 ignition attempts Check gas supply to the appliance.
E 13 Reset limit reached Resets are limited to 5 every
15 minutes
Turn unit OFF and ON to resume
normal operation.
E 34 Low voltage
Line voltage has fallen be-
low an acceptable operating
level
The appliance will automatically
reset once line voltage returns to
normal.
E 37 Low Water
Water pressure has fallen
below an acceptable oper-
ating level (0.7 bar)
Rell the system to reach a normal
range pressure. The appliance will
automatically reset once water
pressure returns to normal.
E 94 Internal Display Fault Display memory error Turn appliance o and on to re-
sume normal operation.

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Select CH Demand
Thermostat & Setpoint
Constant & Setpoint
0 - 10 V Modulation Signal
CH1 Setpoint
82°C
20°C 87°C
CH2 Setpoint
60°C
20°C 87°C
EZ Setup Complete
Heating EZ setup is complete.
Additional changes can be made in
the Installer Menu if required.
Press OK to return to EZ Setup Menu
0 - 10V Modulation Signal - This option allows the HeatMaster ring rate to be controlled by an external control system.
Refer to the Installer’s Handbook, Volume 1, for more information.
CH1 Setpoint prompts to enter the xed setpoint for a CH1 heating call when a
Setpoint option is chosen in Select CH Demand. Press on LEFT or RIGHT button
to adjust the required temperature setpoint then press OK to store the setting.
The CH2 Setpoint screen appears.
CH2 Setpoint prompts to enter the xed setpoint for a CH2 heating call when a
Setpoint option is chosen in Select CH Demand. Press on LEFT or RIGHT button
to adjust the required temperature setpoint then press OK to store the setting
and complete the Heating setting.
CH1 Default: 82°C.
CH2 Default: 60°C
Select CH Demand prompts the installer to select how a CH Demand is generated. There are three Select CH Demand options,
among which the installer must make a selection.
Thermostat & Setpoint - This option is only displayed when no outdoor temperature sensor is connected. A central heating call from
a thermostat or zone panel will enable the HeatMaster and the setpoint will be xed for central heating calls. When Thermostat &
Setpoint is selected, the CH1 Setpoint screen appears.
Constant & Setpoint - The HeatMaster will maintain setpoint without an external CH call from a thermostat or zone panel. The set-
point will be xed for CH calls. When Constant & Setpoint is selected, the CH1 Setpoint screen appears.
EZ Setup
Heating Easy setup (no outdoor sensor connected)
Select CH Demand
Thermostat & Setpoint
Constant & Setpoint
0 - 10 V Modulation Signal
Select CH Demand
Thermostat & Setpoint
Constant & Setpoint
0 - 10 V Modulation Signal
EZ Setup Complete
Heating EZ setup is complete.
Additional changes can be made in
the Installer Menu if required.
Press OK to return to EZ Setup Menu
Heating EZ Setup
• To navigate on the screen, use the UP, DOWN, LEFT and RIGHT keys, OK
• Use 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.

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USER’S GUIDE
Heating Easy Setup (outdoor sensor connected)
Select CH Demand
Thermostat & Outd. Curve
Constant & Outdoor Curve
Constant & Setpoint
0 - 10 V Modulation Signal
Select CH Demand
Thermostat & Outd. Curve
Constant & Outdoor Curve
Constant & Setpoint
0 - 10 V Modulation Signal
82°C
27°C
18°C -12°C
Current Settings
Select CH1 Outd. Curve
MAX
60°C
27°C
18°C -12°C
Current Settings
Select CH2 Outd. Curve
Warm Weather Shutdown
O
O 25°C
EZ Setup Complete
Heating EZ setup is complete.
Additional changes can be made in
the Installer Menu if required.
Press OK to return to EZ Setup Menu
Select CH Demand prompts the installer to select how a CH Demand is generated. There are several Select CH Demand options,
among which the installer must make a selection.
Thermostat & Outd. Curve – This option is only displayed when the outdoor temperature sensor is connected. A central heating
call from a thermostat or zone panel will enable the appliance and the setpoint will vary with the outdoor temperature for central
heating calls.
Constant & Outdoor Curve - This option is only displayed when the outdoor temperature sensor is connected. The HeatMaster will
maintain the setpoint without an external call from a thermostat or zone panel. The setpoint will vary with the outdoor temperature
for central heating calls.
Select CH1 Outd. Curve prompts to select an outdoor curve for a CH1 heating call when an Outdoor Reset option is chosen in Select
CH Demand. Outdoor curve presets are available to cover most applications. The outdoor curve can also be adjusted to any desired
settings in the Installer Menu (refer to Installer’s Handbook).
Press on UP or DOWN button to select the outdoor reset curve appropriate for the type of heating system, then press OK to store
the setting.
Default: Systems with a temperature between 27°C and 82 °C.
Select CH2 Outd. Curve prompts to select an outdoor curve for a CH2 heating call when an Outdoor Reset option is chosen in Select
CH Demand. Outdoor curve presets are available to cover most applications. The outdoor curve can also be adjusted to any desired
settings in the Installer Menu (refer to Installer’s Handbook).
Press on UP or DOWN button to select the outdoor reset curve appropriate for the type of heating system, then press OK to store the
setting.
Default: Systems with a temperature between 27°C and 60 °C
Warm Weather Shutdown allows to enter an optional outdoor temperature at which to disable the central
heating function. The HeatMaster will continue to respond to a domestic hot water call or a 0- 10V Modu-
lation Signal when the outdoor temperature exceeds the Warm Weather Shutdown Temperature setting.
Press the LEFT or RIGHT buttons to adjust the Warm Weather Shutdown Temperature 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 preset temperature.
Default: OFF.
EZ Setup
Heating EZ Setup

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Select CH Demand
Thermostat & Outd. Curve
Constant & Outdoor Curve
Constant & Setpoint
0 - 10 V Modulation Signal
CH1 Setpoint
82°C
20°C 87°C
CH2 Setpoint
60°C
20°C 87°C
EZ Setup Complete
Heating EZ setup is complete.
Additional changes can be made in
the Installer Menu if required.
Press OK to return to EZ Setup Menu
EZ Setup Complete
Heating EZ setup is complete.
Additional changes can be made in
the Installer Menu if required.
Press OK to return to EZ Setup Menu
Select CH Demand
Thermostat & Outd. Curve
Constant & Outdoor Curve
Constant & Setpoint
0 - 10 V Modulation Signal
Refer to page 9 for screen descriptions
Refer to page 9 for screen descriptions
EZ Setup
Heating EZ Setup
Warm Weather Shutdown
O
O 25°C

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USER’S GUIDE
DHW Setup
EZ Setup
DHW EZ Setup Select DHW Demand
Thermostat
Sensor
Select DHW Demand
Thermostat
Sensor
Select DHW Demand prompts the installer to select how a DHW Demand is generated. There are two Select DHW Demand options,
among which the installer must make a selection.
When Thermostat is selected in Select DHW Demand, a domestic hot water call from an aquastat or dry contact switch will enable
the appliance with a xed setpoint for a domestic hot water call..
When Sensor is selected in Select DHW Demand, it requires the use of an optional Indirect Water Heater Sensor. The appliance mon-
itors the DHW storage temperature and generates a DHW call whenever the temperature drops below the DHW storage setpoint by
3°C.
Default : Sensor
DHW Boiler Setpoint prompts to enter the xed appliance setpoint temperature during a hot water call when theThermostat option
is selected.
Press on LEFT or RIGHT button to adjust the required temperature setpoint then press OK to store the setting.
Default: 75°C.
DHW Setpoint prompts to enter the DHW storage setpoint temperature.
Press on LEFT or RIGHT button to adjust the required temperature setpoint then press OK to store the setting.
Default: 60°C.
The Boiler DHW Setpoint will automatically be set 15°C higher than the DHW Setpoint setting
DHW Priority Timeout prompts to enter an optional time limit that a domestic hot water call has priority
over central heating call (HeatMaster only).
Press on LEFT or RIGHT button to adjust the required timeout value, if required, then press OK to store the
setting and complete the DHW setting.
Default: O
DHW Priority Timeout
O
O 120 min.
DHW
Boiler Setpoint
75°C
35°C 87°C
DHW Setpoint
60°C
20°C 75°C
EZ Setup Complete
DHW EZ setup is complete.
Additional changes can be made in
the Installer Menu if required.
Press OK to return to EZ Setup Menu

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USER’S GUIDE
Boiler Protection
P3
DHW
P4
84°C
61°C
1
2
CH
Target = 85°C
HeatMaster
EZ Setup
Starting from the Home screen :
CH / DHW Operation Boiler Information Select Language
Selecting this icon
and validating the
selection with the
OK key allows to
access directly to the
language selection
page (see on the left)
Easy Setup Reset
EZ Setup
EZ Setup
EZ Setup Reset EZ Setup Reset
Press OK to restore factory settings,
any other button to keep current
settings.
EZ Setup Reset allows to reset all EZ
setup settings back to the original factory
defaults.
Follow the on-screen instructions to reset
all EZ setup settings.
Display Easy Setup
Display EZ Setup
English
Français
Nederlands
Español
Italiano
Deutsch
Select Unit
Fahrenheit
Celsius
Display EZ Setup allows to select the
interface language (Nine dierent languag-
es: English, French, Dutch, Spanish, Italian,
German, Czech, Polish and Russian).
Press on UP or DOWN button to select the
required language then press OK to store the
setting.
Display EZ Setup allows to select the inter-
face temperature unit.
Press on UP or DOWN button to select the
required unit then press OK to store the set-
ting.

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USER’S GUIDE
CH / DHW Operation
CH/DHW Operation
Heating enabled DHW enabled CH/DHW Operation provides a simple way to enable/disable either the CH or the DHW function of the appli-
ance.
Press on LEFT or RIGHT button to select the object (CH or DHW icon), then press OK to toggle between the
enabled/disabled status. The status of the circuit is displayed at the top of the screen.
Using the arrow keys, select the HOME or RETURN icon at the bottom of the screen to go back either to the
home page or to the previous screen respectively.
Default:
DHW enabled
Boiler Information screen provides real time operating information of the appliance. Each line contains an
information item followed by its current value. Six lines are displayed on the screen at one time.
Press on UP or DOWN button to scroll through the items. For more information, refer to the Installer’s Handbook
of the appliance.
Lockout History records the last eight lockouts. Six lines are displayed on the Lock-
out History screen at one time. Each line contains a lockout description followed
by how long ago the lockout occurred.
Press on UP or DOWN button to scroll through the items and on OK to select any of
them and get more details through the Lockout Details screen. For more informa-
tion, refer to the Installer’s Handbook of the appliance.
Boiler Information
Boiler Information
a
b
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d
e
f
b
b
b
b
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Boiler Information
Boiler Status Standby
Heating Call No
DHW Call No
Boiler Firing Rate --
Ionization current μA
Boiler Setpoint --
Lockout History
a
b
c
d
e
f
b
b
b
b
a
b
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b
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Lockout History
1. Blower speed 5h ago
2. DHW Sensor Open 2h ago
3. Sensor Drift 25 h ago
4. No error 27 h ago
5. No error 27 h ago
6. No error 27 h ago
Lockout Details
Blower speed
Boiler Status --
Heating Call --
DHW Call --
Boiler Firing Rate 44%
Ionization current 44μA
Boiler Information

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APPLIANCE DESCRIPTION
CONFIGURATION IN A SYSTEM
The boiler can be set up in dierent types of systems, either high or low temperature, or both, with or
without external Domestic Hot Water tank. It is up to the installer to determine the best solution and
reach the results the user is expecting.
A basic conguration is shown in this manual for HeatMaster 201 (see “Conguration and system set-up”
on page 30), with the required accessories, required electrical connections and ACVMax set up using
the EZ setup function.
Additional congurations requiring a more advanced setup are shown in the Installer’s Handbook, avail-
able on the ACV website (www.ACV.com). The setup of those systems must be made exclusively by the
installer using the installer code.
For any other conguration that is not mentioned in either manual, please contact your ACV represent-
ative.
HEATM ASTER®201
The HeatMaster® 201 boiler is equipped with ACV's "Tank-in-Tank" concept, as well as high eciency
charging pumps and with an ACV air/gas premix burner BG-2000 M with low NOx emissions. During op-
eration, the burner starts automatically as soon as the appliance temperature gets lower than the preset
temperature and stops as soon as the preset temperature is reached.
The HeatMaster® 201 features a built-in frost protection mechanism: as soon as the ow temperature
[NTC1 probe] drops below 7°C, the central heating pumps are activated. As soon as the ow temperature
is at 5°C, the burner starts up until the ow temperature rises above 15°C. The pumps continue to run for
around 10 minutes. The function can be enabled or disabled through the installer menu. When the frost
protection is disabled, only the pumps operate.
An anti-freeze function is also available if an outdoor temperature sensor is connected, the pumps are
activated when the outside temperature drops below the threshold dened through the Freeze protec-
tion function in the installer menu. In order to enable the appliance to protect the whole system against
freezing, all the valves of the radiators and the convectors should be completely open.
HEATMASTER® 201 OVERVIEW
1. Chimney reduction with horizontal outlet Ø
250 mm
2. DHW tank dry-well + NTC3 sensor
3. DHW hot water outlet
4. Flue gas tubes and turbulators
5. Stainless steel hot water production tank
6. Primary circuit tank
7. Combustion chamber
8. Foam insulation
9. Air/gas premix burner
10. Circulator pump (2x - only one shown)
11. Pressure sensor
12. Electrical panel (with spare fuses at the back)
13. ACVMax Control panel
14. Pressure gauge (primary circuit)
15. Cconnection for recirculation (DHW)
16. Automatic air vent
17. Cold water inlet + dip tube

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APPLIANCE DESCRIPTION
CONNECTIONS  AT THE BACK AND ON THE TOP
1. Chimney reduction with horizontal outlet
Ø250mm
2. Cold Water inlet [M]
3. Domestic Hot Water outlet [M]
4. Heating supply connection [F]
5. Heating return connection [F]
6. Drain valve
7. Grommets for electrical connection (to
be installed)
8. NTC primary supply sensor
9. Connection for recirculation (DHW) (op-
tional)
10. Pre-cut panel for gas connection (left
and right sides)
11. Auto air vent
12. Filling loop connection

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APPLIANCE DESCRIPTION
AIR/GAS PREMIX BURNERS ACV BG 2000M/201
Operation
The power continually adjusts itself according to demand; this greatly improves the operating eciency
for heating and hot water.
The burner tube is covered with a metal bre (NIT), which, besides its remarkable heat exchange capacity,
guarantees longer burner life.
The burner’s main components are:
• a variable speed fan
• an automatic ignition and ame detection system
• a gas valve and venturi tube set specially developed for low NOx pre-mix air/gas burners
Gas pressure in the gas valve outlet is kept equal to the absolute air pressure in the venturi tube inlet,
corrected by the oset adjustment on the regulator.
The fan pulls the combustion air through the venturi tube whose neck is connected to the gas valve
outlet. The pressure dierential created at the neck of the venturi tube by the airow rate induces gas
intake proportional to its level (the larger the air ow rate, the greater the dierential and there is a larger
quantity of gas intake). The air/gas combination is then introduced into the burner via the fan.
THIS PRINCIPLE GUARANTEES SAFE AND QUIET OPERATION:
• In the event of low air flow, the differential across the venturi tube falls, the gas flow rate diminishes,
the flame extinguishes and the gas valve closes: the burner is then in safety mode.
• In the event of flue blockage or restriction, the air flow rate falls, and there are then the same reac-
tions as those described before causing burner stop in safety mode.
• The BG 2000-M burner installed on the HeatMaster® 201 model is controlled by an ACVMax Hon-
eywell controller which manages both the burner safety function and its modulation according to
temperature.
1. Ignition and ionisation electrode
2. Burner tube
3. Burner insulation
4. Flame sight glass
5. Fan
6. Venturi tube
7. Gas valve
8. Gas connection

2145 mm
1018 mm 1395 mm
2390 mm
2230 mm
1795 mm
615 mm
605 mm
330 mm
510 mm
510 mm
600 mm
210 mm
C
A
B D
E
C
A
BD
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TECHNICAL CHARACTERISTICS
Appliance Dimensions HM 201
Heating Connection [F] “ 2
DHW Connection [M] “ 2
Gas connection [M] “ 1 1/4
min. ∅of ue pipe mm 150
Drained weight Kg 635
CLEARANCE
DIMENSIONS
Appliance Clearance HM 201
A(mm) Recommended 1000
Minimum 800
B(mm) Recommended 800
Minimum 700
C(mm) Recommended 1000
Minimum 800
D(mm) Recommended 300
Minimum 250
E(mm) Recommended 1300
Minimum 1100

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TECHNICAL CHARACTERISTICS
CHIMNEY CONNECTION CHARACTERISTICS
It is mandatory to ventilate the boiler room. The high or low air vent opening dimensions
depend on the appliance power and the boiler room size. Refer to the local regulations in force.
FLUE PIPE CONNECTION TYPES
It is mandatory to use ACV flue systems to connect the appliance.
B23 : Connection to an exhaust duct that discharges the combustion products outside the room
where it is installed, with the combustion air being drawn directly from the boiler room.
B23P: : Connection to a combustion product exhaust system designed to operate with positive pressure.
C53(x) : Connection to separate ducts for supplying combustion air and discharging combustion prod-
ucts; these ducts may end in zones with dierent pressure levels, but are not allowed to be
installed on opposite walls of the building.
Main Characteristics HM201
Air/flue pipe Ø Parallel mm 250
Max. allowed ue pipe pressure
drop Pa 130
Max recommended length (corresponding
length in meters of straight pipes) 12 m
Available connection types B23 - B23P - C53(x)
C53(x) B23
B23P
COMBUSTION CHARACTERISTICS
Main Characteristics
HM201
G20/G25
Input (PCI)
max kW 220.0
min kW 58.4
Output at 100%
(80/60°C) kW 198.0
(50/30°C) kW —
Eciency at 100%
(80/60°C) % 91.0
(50/30°C) % —
Eciency at 30% load (EN677) % 94.0
Combustion eciency at 100% % 91.5
NOx (Class 5)
Max. output mg/kWh 68.0
Min. output mg/kWh 45.0
Weighted mg/kWh 43.0
CO
Max. output ppm 4
Min. output ppm 2
CO2
Max. output %CO29.5
Min. output %CO28.9
Max gas ow rate
G20/G25
20 mbar m³/h 25.4
25 mbar m³/h 29.5
Temp of ue gases
Average °C 150
Max. °C 194
Min. °C 92
Average temp. of combus-
tion products DHW mode °C 187
Mass ow rate* of ue
gases Nominal g/s 113
Standby loss
∆T = 45 K
W 678
∆T = 30 K
W 408
* Mass flow rate values were calculated for G20 with an air factor of 1.3.

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TECHNICAL CHARACTERISTICS
GAS CATEGORIES
Gas type G20 G25 G20 G25
Pressure (mbar) 20 20 25 20 25
Country code Category
AT
I2H
I3P
I3B/P
BE
I2E(S)
I2E(R)
I3P
CH
I2H
I3P
I3B/P
CY I2H
I3B/P
CZ I2H
I3P
DE
I2E
I2ELL
I3P
I3B/P
DK I2H
I3B/P
EE I2H
I3B/P
ES I2H
I3P
FR
II2Er
I3P
I3B/P
GB
I2H
I3P
I3B/P
GR I2H
I3P
HR
I2H
I3P
I3B/P
HU I2HS
I3B/P
Gas type G20 G25 G20 G25
Pressure (mbar) 20 20 25 20 25
Country code Category
IE I2H
I3P
IT
I2H
I3P
I3B/P
LT
I2H
I3P
I3B/P
LU I2E
I3B/P
LV I2H
NL
I2L
I3P
I3B/P
NO I2H
I3B/P
PL I2E
I3P
PT I2H
I3P
RO
I2E
I2H
I3P
I3B/P
SE I2H
I3B/P
SI
I2H
I3P
I3B/P
SK
I2H
I3P
I3B/P
TR I2H
I3B/P

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TECHNICAL CHARACTERISTICS
ELECTRICAL CHARACTERISTICS HEATMASTER®201
230 VAC OUTPUT !
HM 201
Main Characteristics
Rated voltage V~ 230
Rated frequency Hz 50
Electrical consumption Max. W 525
Min. W 210
Electrical consumption at
30% load W240
Electrical consumption in
standby W5
Rated current (Fuse) A 10
Class IP 40
Key
1. ON/OFF master switch
2. Gas valve
3. Burner power supply
4. Ground
5. Burner PWM plug
6. NTC2 return sensor
7. NTC1 supply sensor
8. NTC - Low temperature circuit
For low temp circuit operation, black wires from X3, terminals 1 & 6 must be
routed to X20, terminals 3 & 4.
9. High limit switch
10. Low water pressure sensor
11. PCB (Display)
12. ACVMax programmation plug
13. A & B Modbus (option)
14. NTC3 DHW sensor
15. NTC4 outdoor temperature sensor (option)
16. Room thermostat 1 (option)
17. 0-10 Volt (option)
18. Room thermostat 2 (option)
19. Ignition and ionization cable
20. Connection for Interface Control Unit (option)
21. 5AT slow-blow fuse (3x) for internal and optional circuits*
22. Terminal block :
• Line
• Pump
• DHW
• Alarm
• CH
• Flame
• Pump
* 5AT slow-blow fuse (2x) for internal circuits and connection of CH, DHW and Flame output + 5AT slow-blow fuse (1x) for connection of
Alarm, P3 and P4 (connector P14).
2 spare 5AT slow-blow fuses are located on the back side of the electrical box, for fuse replacement, if required.