ACV HeatMaster 25 TC Manual

A1003129 - 664Y6900 • C
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INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
for the Installer and the User
25 - 35 - 45 - 70 - 85 - 120 TC
HeatMaster

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HeatMaster 25 - 35 - 45 - 70 - 85 - 120 TC : A1003129 - 664Y6900 • C
TABLE OF CONTENTS
GENERAL RECOMMENDATIONS....................................................................................3
Safety Instructions........................................................................................................................................................................3
USER’S GUIDE...................................................................................................................4
Meaning of Symbols ....................................................................................................................................................................4
Boiler Marking................................................................................................................................................................................5
Control Panel and Display .........................................................................................................................................................6
Stand-by Screen ............................................................................................................................................................................7
Lockout Screen..............................................................................................................................................................................7
Status Messages............................................................................................................................................................................7
What to Check on a Regular Basis ..........................................................................................................................................8
In case of Problem........................................................................................................................................................................8
Boiler Setup Guide .......................................................................................................................................................................8
APPLIANCE DESCRIPTION............................................................................................15
Models - HeatMaster® 25 - 35 - 45 - 70 - 85 - 120 TC.......................................................................................................15
Conguration in a system........................................................................................................................................................15
HeatMaster® 25 - 35 - 45 TC overview.................................................................................................................................15
HeatMaster® 70 - 85 - 120 TC overview...............................................................................................................................16
Connections - at the back........................................................................................................................................................17
TECHNICAL CHARACTERISTICS..................................................................................18
Dimensions ...................................................................................................................................................................................18
Clearance .......................................................................................................................................................................................19
gas categories (All models).....................................................................................................................................................19
Combustion characteristics................................................................................................................................................... 20
Chimney connection characteristics...................................................................................................................................21
Calculation of the ue pressure drop in the ue pipes............................................................................................... 22
Cascade : calculation of the maximum length of ue pipes..................................................................................... 23
Electrical Characteristics HeatMaster®25-35-45 TC......................................................................................................24
Electrical Characteristics HeatMaster®70-85 TC ........................................................................................................... 26
Electrical Characteristics HeatMaster®120 TC ................................................................................................................ 28
Hydraulic Characteristics ........................................................................................................................................................ 30
Hydraulic Pressure Drop Curve of the Boilers................................................................................................................. 30
DHW performance .................................................................................................................................................................... 30
Maximum Operating Conditions......................................................................................................................................... 30
Recommendations for the Prevention of Corrosion and Scaling in Heating Systems.....................................31
G3 Requirements and Guidance - UK Only.......................................................................................................................32
INSTALL ATION ..............................................................................................................34
Safety Instructions for the Installation .............................................................................................................................. 34
Package contents........................................................................................................................................................................35
Tools Required for the Installation...................................................................................................................................... 36
Boiler preparation...................................................................................................................................................................... 36
Hydraulic Connections ............................................................................................................................................................ 36
DHW connection........................................................................................................................................................................ 36
Heating Connection ..................................................................................................................................................................37
Removal and Installation of the Front and Top Panels................................................................................................ 38
Gas Connection.......................................................................................................................................................................... 38
Conversion to Propane.............................................................................................................................................................39
CONFIGURATION AND SYSTEM SETUP.....................................................................40
Basic Conguration - HeatMaster 25 TC V15: High Temperature Heating Circuit Controlled by Room
Thermostat and Optional Outdoor Sensor...................................................................................................................... 40
Cascade Conguration, Controlled by EBV Controller .............................................................................................. 41
STARTING UP .................................................................................................................42
Safety Instructions for Starting up.......................................................................................................................................42
Tools Required for Starting up...............................................................................................................................................42
Checks before Starting up.......................................................................................................................................................42
Filling the system........................................................................................................................................................................42
Starting up the Boiler ................................................................................................................................................................43
Checking and Adjusting the Burner....................................................................................................................................43
MAINTENANCE..............................................................................................................44
Safety Instructions for the Boiler Maintenance.............................................................................................................. 44
Tools Required for Maintenance.......................................................................................................................................... 44
Boiler shut down for Maintenance...................................................................................................................................... 44
Periodic Boiler Maintenance Tasks...................................................................................................................................... 44
Draining the Boiler .................................................................................................................................................................... 45
Removal, Check and Installation of the Burner Electrode ......................................................................................... 45
Removal and Installation of the Burner ............................................................................................................................ 46
Torque Values...............................................................................................................................................................................47
Cleaning the Exchanger .......................................................................................................................................................... 48
Restarting after Maintenance............................................................................................................................................... 48
LOCKING CODES ...........................................................................................................49
SERVICE LOG ..................................................................................................................52
DECLARATION OF CONFORMITY...............................................................................53
PRODUCT FICHE............................................................................................................54

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.
• 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.
• Make sure that the condensate outlet is never obstructed and that a condensate
neutralisation system is installed if required.
• 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
"Boiler Setup Guide" on page 8, 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 provided with
the boiler.

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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
Symbols on the
packaging Meaning
Fragile
Keep dry
Keep standing, up
Danger of tipping over
Hand truck or pallet truck required for transport
Symbols on the
appliance Meaning
Gas connection
Condensate trap (ball syphon)
Domestic Hot Water circuit
Primary circuit
Electricity
Alarm

HeatMaster 25 TC
HeatMaster 45 TC
HeatMaster 35 TC HeatMaster 70 TC HeatMaster 85 TC
HeatMaster 120 TC
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USER’S GUIDE
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.
BOILER MARKING
Location: Back panel

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 operat-
ing state of the boiler. See “Status Mes-
sages” 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 boiler type is indicated at the top of the screen. The type and model are
factory preset.
The boiler is represented in the centre of the Home Screen. Basic operating
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 boiler 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.
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 boiler,
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 boiler after a locking (follow the instructions on the
screen).
5. ON/OFF master switch of the boiler - 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 appearing 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 boiler.

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 8 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 8 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 8, 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 HeatMaster is ready to respond when a demand
is received.
STATUS MESSAGES
Stand-by Indicates that the HeatMaster 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 boiler supply and return temperatures. The ring rate will begin in-
creasing once the temperature dierence is less than25°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
BOILER SETUP GUIDE
The main parameters of the HeatMaster boilers can be set up using the EZ (easy) setup function of the
ACVMax controller. The EZ setup function allows the user/installer to quickly setup the appliance for im-
mediate 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 boiler, the boiler 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 boiler. If there is, please call your installer.
• If a condensate neutralisation system is installed, check it and have it cleaned regularly.
• 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 49.
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 boiler.
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 boiler 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 boiler will auto-
matically 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.

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
EZ Setup
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
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USER’S GUIDE
0 - 10V Modulation Signal - This option allows the HeatMaster ring rate to be controlled by an external control system.
Refer to 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.
Heating Easy setup (no outdoor sensor connected)
• 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

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
EZ Setup
Heating EZ Setup
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USER’S GUIDE
Heating Easy Setup (outdoor sensor connected)
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 boiler 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.

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
EZ Setup
Heating EZ Setup
Warm Weather Shutdown
O
O 25°C
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USER’S GUIDE
Refer to page 9 for screen descriptions
Refer to page 9 for screen descriptions

EZ Setup
DHW EZ Setup Select DHW Demand
Thermostat
Sensor
Select DHW Demand
Thermostat
Sensor
DHW Priority Timeout
O
O 120 min.
DHW
Boiler Setpoint
75°C
35°C 87°C
DHW
Storage 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
DHW Setup
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 HeatMaster 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 HeatMaster moni-
tors 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 boiler setpoint temperature during a hot water call when the Thermostat 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 Storage 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 DHW Storage 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.
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

EZ Setup
EZ Setup Reset EZ Setup Reset
Press OK to restore factory settings,
any other button to keep current
settings.
EZ Setup
Display EZ Setup
English
Français
Nederlands
Español
Italiano
Deutsch
Select Unit
Fahrenheit
Celsius
Boiler Protection
P3
DHW
P4
84°C
61°C
1
2
CH
Target = 85°C
HeatMaster
EZ Setup
CH / DHW Operation Boiler Information Select Language
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USER’S GUIDE
Starting from the Home screen :
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 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 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.

CH / DHW Operation Heating enabled DHW enabled
Boiler Information
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Boiler Information
Boiler Status Standby
Heating Call No
DHW Call No
Boiler Firing Rate --
Ionization current μA
Boiler Setpoint --
Boiler Information
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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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HeatMaster 25 - 35 - 45 - 70 - 85 - 120 TC : A1003129 - 664Y6900 • C
USER’S GUIDE
CH/DHW Operation
CH/DHW Operation provides a simple way to enable/disable either the CH or the DHW function of the Heat-
Master.
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 HeatMaster. 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 HeatMaster boilers.
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 HeatMaster boilers.
Boiler Information

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HeatMaster 25 - 35 - 45 - 70 - 85 - 120 TC : A1003129 - 664Y6900 • C
APPLIANCE DESCRIPTION
CONFIGURATION IN A SYSTEM
The HeatMaster® TC boilers 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. The HeatMaster® TC boilers can also be set
up in a cascade system, using an external controller. Refer to “Conguration and system set-up” on page
40 for more information.
It is up to the installer to determine the best solution and reach the results the user is expecting.
One basic conguration is shown in this manual (see “Conguration and system set-up” on page 40),
with the required accessories, required electrical connections and ACVMax setup using the EZ setup func-
tion.
Additional congurations requiring a more advanced setup are shown in the Installer’s Handbook of the
appliance. 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 manuals, please contact your ACV represent-
ative.
MODELS  HEATMASTER®25  35  45  70  85  120 TC
The HeatMaster® TC series is a range of condensing combination boilers. The boilers combine ACV's
"Tank-in-Tank" concept with a double primary circuit to reach the high performance of a TOTAL CONDEN-
SATION, double-circuit boiler.
All the HeatMaster® TC models are equipped with a high eciency charging pump and with an ACV air/
gas premix burner with low NOx emissions. During operation, the burner starts automatically as soon as
the boiler temperature gets lower than the preset temperature and stops as soon as the preset temper-
ature is reached.
The HeatMaster® TC series features a built-in frost protection mechanism: as soon as the ow tempera-
ture [NTC1 probe] drops below 7°C, the central heating pumps are activated. As soon as the ow temper-
ature 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 HeatMaster boiler to protect the whole system
against freezing, all the valves of the radiators and the convectors should be completely open.
1. Concentric ue gas/air inlet box
2. Flue gas exhaust tube
3. Combustion chamber
4. Stainless steel heat exchanger
5. Stainless steel “Tank-in-Tank” hot water produc-
tion tank
6. Primary circuit separation disc
7. Indirect water pre-heater
8. Condensate recovery dish + NTC5 sensor (ue gas)
9. High eciency circulator pump
10. NTC2 sensor (CH return)
11. Pressure sensor
12. Heating circuit
13. Electrical panel (with spare fuses at the back)
14. ACVMax Control panel
15. DHW tank dry well (Dip tube with temperature sen-
sor)
16. Automatic air vent
17. Gas pipe
18. NTC1 sensor (CH supply)
19. Gas valve
20. DHW safety valve / (T & P relief valve - UK only)
21. Modulating air/gas premix burner with fan
22. Air inlet
HEATMASTER® 25  35  45 TC OVERVIEW

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HeatMaster® 70-85 TC
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HeatMaster 25 - 35 - 45 - 70 - 85 - 120 TC : A1003129 - 664Y6900 • C
APPLIANCE DESCRIPTION
HEATMASTER® 70  85  120 TC OVERVIEW
1. Concentric ue gas/air inlet box
2. Flue gas exhaust tube
3. Combustion chamber
4. Stainless steel heat exchanger
5. Stainless steel “Tank-in-Tank” hot water production tank
6. Primary circuit separation disc
7. Indirect water pre-heater
8. Condensate recovery dish + NTC5 sensor (ue gas)
9. High eciency circulator pump
10. NTC2 sensor (CH return)
11. Pressure sensor
12. Heating circuit
13. Electrical panel (with spare fuses at the back)
14. ACVMax Control panel
15. DHW tank dry well (Dip tube with temperature sensor)
16. Automatic air vent
17. Gas pressure switch
18. NTC1 sensor (CH supply)
19. Gas valve
20. DHW safety valve / (T & P relief valve - UK only)
21. Modulating air/gas premix burner with fan
22. Air inlet

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HeatMaster® 120 TC
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HeatMaster 25 - 35 - 45 - 70 - 85 - 120 TC : A1003129 - 664Y6900 • C
APPLIANCE DESCRIPTION
1. Discharge for built-in DHW safety valve / (T & P re-
lief valve - UK only) outlet to be connected to the
sewage system
2. Gas connection [M]
3. Grommets for electrical wires (low voltage con-
trol)
4. Domestic Hot Water outlet [M]
5. Heating supply connection ([F]
6. Connection for provided heating safety valve (to
be installed).
7. Connection for low temperature heating circuit
return (HM 70 - 85 - 120 TC only)
8. Heating return connection [F]
9. Grommets for electrical wires (230 V)
10. Domestic Hot Water inlet [M]
11. Flue connection
CONNECTIONS  AT THE BACK

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B
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HeatMaster 25 - 35 - 45 - 70 - 85 - 120 TC : A1003129 - 664Y6900 • C
TECHNICAL CHARACTERISTICS
DIMENSIONS
Boiler Dimensions HM 25 - 35 - 45 TC HM 70 - 85 TC HM 120 TC
Amm 1755 2170 2170
Bmm 600 690 690
Cmm 708 753 753
D mm 80 100 100
E mm 125 150 150
F mm 145 155 155
G mm 1670 2080 2080
H mm 110 125 125
J ( ) mm 1717 2126 2126
K ( ) mm 1610 2030 2030
L ( ) mm 1405 1750 1750
M (aux. circulation loop) mm  740 740
N ( ) mm 446 540 540
O ( ) mm 273 311 311
Heating Connection [F] “ 1 1.1/2 1.1/2
DHW Connection [M] “ 1 1 1
Auxiliary connection [F] “  1.1/2 1.1/2
Gas connection [M] “ 3/4 3/4 3/4
min. ∅of ue pipe mm 80 100 100
Drained weight Kg 177 298 299

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HeatMaster 25 - 35 - 45 - 70 - 85 - 120 TC : A1003129 - 664Y6900 • C
TECHNICAL CHARACTERISTICS
CLEARANCE
Boiler Clearance HeatMaster® 25 - 35 - 45 - 70 - 85 - 120 TC
A(mm) Recommended 400
Minimum 300
B(mm) Recommended 800
Minimum 600
C(mm) Recommended 400
Minimum 250
D(mm) Recommended 600
Minimum 400
Front view View from the top
GAS CATEGORIES All models
Gas type G20 G25 G20 G25 G31
Pressure (mbar) 20 20 25 20 25 30 37 50
Country code Category
AT II2H3P
CH II2H3P
CZ II2H3P
DE II2E3P
II2ELL3P
ES II2H3P
FI II2H3P
FR II2Er3P
GB II2H3P
GR II2H3P
HR II2H3P
IE II2H3P
IT II2H3P
LT II2H3P
LU II2E3P
NL II2L3P
PL II2E3P
PT II2H3P
RO II2H3P
SI II2H3P
SK II2H3P

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HeatMaster 25 - 35 - 45 - 70 - 85 - 120 TC : A1003129 - 664Y6900 • C
TECHNICAL CHARACTERISTICS
COMBUSTION CHARACTERISTICS
Main Characteristics
HM 25 TC HM 35 TC HM 45 TC
G20/G25 G31 G20/G25 G31 G20/G25 G31
Input (PCI)
max kW 25.0 25.0 35.0 35.0 45.0 45.0
min kW 5.0 5.0 7.0 7.0 9.0 9.0
Output at 100%
(80/60°C) kW 24.3 24.3 34.1 34.1 44.1 44.1
(50/30°C) kW 26.0 26.0 36.4 36.4 46.8 46.8
Eciency at 100%
(80/60°C) % 97.3 97.3 97.3 97.3 98.0 98.0
(50/30°C) % 103.9 103.9 103.9 103.9 103.9 103.9
Eciency at 30% load (EN677) % 108.9 108.9 108.9 108.9 108.9 108.9
Combustion
eciency at 100% % 98.2 98.2 98.2 98.2 97.9 97.9
NOx (Class 5)
Max. output mg/kWh 64 — 55 — 53 —
Min. output mg/kWh 12 — 12 — 21 —
Weighted mg/kWh 29 — 33 — 39 —
CO
Max. output ppm 27 — 48 — 63 —
Min. output ppm 6 — 4 — 4 —
CO2
Max. output %CO28.8 10.1 9.2/8.9 10.7 9.0 10.7
Min. output %CO28.3 9.3 8.8/8.4 10.2 8.4 10.1
Max gas ow rate
G20/G25
20 mbar m³/h 2.66 — 3.64 — 4.67 —
25 mbar m³/h 2.96 — 4.23 — 4.67 —
Max. gas ow rate G31 30/37/50 mbar
m3/h — 0.98 — 1.4 — 1.77
Kg/h — 1.9 — 2.7 — 3.5
Temp of ue gases
Normal °C 57.7 57.7 58.2 58.2 64.1 64.1
Max. °C 120 120 120 120 120 120
Min. °C 32.9 32.9 29.2 29.2 30.1 30.1
Average temp. of combus-
tion products DHW mode °C 52.6 52.6 52.6 52.6 52.6 52.6
Mass ow rate* of ue
gases
Normal g/s 11.6 11.6 15.5 15.5 21.1 20.1
Min. output g/s 2.45 2.54 3.26 3.28 4.36 4.25
Standby loss
∆T = 45 K
W 187 187 187 187 187 187
∆T = 30 K
W 113 113 113 113 113 113
Main Characteristics
HM 70 TC HM 85 TC HM 120 TC
G20/G25 G31 G20/G25 G31 G20/G25 G31
Input (PCI)
max. kW 69.9 69.9 85.0 85.0 115.0 115.0
min. kW 21.5 21.5 21.0 21.0 25.0 25.0
Output at 100%
(80/60°C) kW 68.0 68.0 82.9 82.9 111.7 111.7
(50/30°C) kW 74.0 74.0 89.9 89.9 121.7 121.7
Eciency at 100%
(80/60°C) % 97.3 97.3 97.5 97.5 97.1 97.1
(50/30°C) % 105.8 105.8 105.8 105.8 105.8 105.8
Eciency at 30% load (EN677) % 109 109 108.4 108.4 108.8 108.8
Combustion
eciency at 100% % 98.1 98.1 98.0 98.0 97.5 97.5
NOx (Class 5)
Max. output mg/kWh 65 — 48 — 48 —
Min. output mg/kWh 23 — 26 — 23 —
Weighted mg/kWh 39 — 36 — 37 —
CO
Max. output ppm 34 — 51 — 58 —
Min. output ppm 7 — 6 — 4 —
CO2
Max. output %CO29.0 10.6 8.8/9.2 10.8 8.9/9.1 11.1
Min. output %CO28.4 10.0 8.3/8.4 10.0 8.4 10.4
Max gas ow rate
G20/G25
20 mbar m³/h 7.2 — 8.6 — 12.0 —
25 mbar m³/h 8.3 — 10.0 — 14.0 —
Max. gas ow rate G31 30/37/50 mbar
m3/h — 2.77 — 3.37 — 4.68
Kg/h — 5.4 — 6.6 — 8.9
Temp of ue gases
Normal °C 60 60 62 62 64.6 64.6
Max. °C 120 120 120 120 120 120
Min. °C 29.0 29.0 28.7 28.7 28.7 28.7
Average temp. of com-
bustion products DHW Mode °C 51.0 51.0 51.0 51.0 51.0 51.0
Mass ow rate* of ue
gases
Normal g/s 31.6 31.6 30.8 37.8 50.8 49.8
Min. output g/s 10.19 9.98 10.19 9.98 12.14 11.5
Standby loss
∆T = 45 K
W 342 342 342 342 342 342
∆T = 30 K
W 206 206 206 206 206 206
* Mass flow rate values were calculated for G20 and G31 with an air factor of 1.3.