Heatmaster 71 User guide

EN • 1
Installation, operating and
servicing instructions
HeatMaster®71
HeatMaster®101
HeatMaster®201
HeatMaster®
664Y2500.B
ENGLISHFRANCAISNEDERLANDSESPAÑOLITALIANODEUTSCH

EN • 2
ENGLISHFRANCAISNEDERLANDSESPAÑOLITALIANODEUTSCH
664Y2500.B
IMPORTANT NOTES 3
Who should read these instructions 3
Symbols 3
Recommendations 3
Certification 3
Important notes 3
DESCRIPTION 4
Working principle 4
Temperature control 4
Building characteristics 4
Frost protection 4
Packaging 4
USER GUIDE 6
Use of the boiler 6
Setting the parameters 7
TECHNICAL CHARACTERISTICS 8
General characteristics 8
Water quality 8
Gas category 9
Domestic hot water performance 9
ELECTRICAL CONNECTION 10
Electrical supply 10
Alarm module 10
HeatMaster®71-101wiring diagram 12
HeatMaster®201 wiring diagram 13
INSTALLATION 14
Dimensions 14
Boiler Room 15
Chimney connection 16
Domestic hot water connection 18
Heating connection 19
Gas connection 19
BURNER CHARACTERISTICS 20
ACV BG 2000-M air/gas pre-mix burners 20
INSTALLATION AND COMMISSIONING 22
Filling of domestic hot water and heating circuits 22
MAINTENANCE 23
Annual maintenance 23
Boiler maintenance 23
Maintenance of safety devices 23
Burner maintenance 23
Draining of the boiler 23
MCBA PARAMETERS FOR THE SPECIALIST 24
Standby Mode 24
Setting the parameters 25
System information 26
Entry of the maintenance code 26
Setting the parameters: only accessible using the code 27
Communication mode 30
Error Mode 30
List of error codes + solutions 31
PARTS LIST at the end of the instructions
INDEX

EN • 3
664Y2500.B
ENGLISHFRANCAISNEDERLANDSESPAÑOLITALIANODEUTSCH
WHO SHOULD READ THESE INSTRUCTIONS
These instructions should be read by:
- the design engineer/consultant
- the user
- the installer
- the service engineer
SYMBOLS
The following symbols are used in this manual:
• Defective parts can only be replaced with original factory
parts. You will find a list of spare parts and their ACV
reference number at the end of this manual.
• The burners are pre-adjusted in the factory for natural gas
[equivalent to G20].
• Specific regulation in Belgium:
The CO2, gas flow, air flow and air/gas supply parameters
are adjusted in the factory and cannot be changed in Belgium,
except for type 1 2E(R)B boilers.
• Before carrying out any work on the boiler, it is important to
isolate the electrical supply to the unit.
• The user must not attempt to gain access to the components
inside the boiler or the control panel.
CERTIFICATION
The appliances bear the “CE” mark, in accordance with the
standards in force in the various countries [European Directives
92/42/EEC “Efficiency”, 90/396/CEE “Gas Appliances”].
These appliances also bear the Belgian gas boiler quality label
“HR+”[gas boiler].
IMPORTANT NOTES
IF YOU SMELL GAS:
- Isolate the gas supply immediately.
- Ventilate the room (Open the windows).
- Do not use electrical appliances and do not operate switches.
- Notify your gas supplier and/or your installer immediately.
This manual forms part of the items delivered with the appliance
and must be given to the user to keep in a safe place!
The system must be installed, commissioned, serviced and
repaired by an approved installer, in accordance with current
standards in force.
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.
The manufacturer reserves the right to change the
technical characteristics and features of its products
without prior notice.
The availability of certain models as well as their
accessories may vary according to markets.
IMPORTANT NOTES
RECOMMENDATIONS
• Before installing and bringing the boiler into service, first
carefully read this manual.
• It is prohibited to modify the interior of the appliance in any
way, without the manufacturer’s prior written agreement.
• The boiler must be installed by a qualified engineer, in
accordance with applicable local standards and local codes
in force.
• Failure to follow the instructions describing test operations
and procedures could result in personal injury or a risk of
environmental pollution.
• In order to ensure the appliance operates safely and
correctly, it is important to have it serviced by an approved
contractor.
• If there is a problem please contact your contractor for
advice.
• 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
contractor of any faults. Remember to indicate the fault
code as it appears on the screen.
Burn hazard.
Essential instruction for the safety
of persons and the environment.
Electrocution hazard: use a qualified
technician.
Essential instruction for the correct
operation of the installation.

EN • 4
ENGLISHFRANCAISNEDERLANDSESPAÑOLITALIANODEUTSCH
664Y2500.B
DESCRIPTION
WORKING PRINCIPLE
The HeatMaster®is a high performance hot water producer
using indirect heat transfer due to it’s Tank-in-Tank technology.
At the centre of the HeatMaster®there is a stainless steel
cylinder through which the flue tubes pass. It is surrounded by
a mild steel shell containing the primary water (neutral fluid).
The outer shell extends down to the combustion chamber and
also surrounds the flue gas tubes. The heat exchange surface
is therefore larger than that of traditional direct fired hot water
boilers.
A circulating pump installed on the primary circuit moves the
water around the tank, heating rapidly and maintaining it at a
constant temperature across the primary circuit.
The burner heats the primary fluid which indirectly heats
the stainless steel cylinder containing the hot water. As with
all Tank-in-Tank systems, the cylinder is corrugated over its full
height and suspended in the HeatMaster®by its hot and cold
water connections.
The fact that the cylinder expands and contracts during use
and that the cold water is not in contact with the intense heat
from the burner flame means that the build-up of lime scale is
prevented.
This resistance to lime scale, along with the corrosion resistance
of the stainless steel, eliminates the need for sacrificial anodes.
The HeatMaster®has a major advantage over other hot water
boilers: it heats hot water with a primary circuit, which allows the
primary fluid to also be used for heating.
The connection of two, three, four or more HeatMaster®in a
cascade meets the most demanding requirements in hot water
and in heating.
Indeed, if it is used in combination with Smart, HR and Jumbo
cylinders, the HeatMaster®can respond to the most demanding
hot water requirements.
TEMPERATURE CONTROL
The HeatMaster®201 are equipped with an electronic
controller MCBA [MicroproCessor Burner Automate], which
handles both the safety functions (ignition, flame monitoring
temperature limitation, etc,…) and the temperature control of
the boiler. This MCBA can also operate as a regulator governed
by outdoor temperature when the outside temperature sensor
is fitted.
However, this regulator can also operate with a standard room
thermostat (on/off). Combining this regulator with a room
thermostat provides temperature control governed by outdoor
weather conditions, with indoor compensation.
The user may access four parameters to adjust all the necessary
settings. By entering a specific maintenance code into the unit,
qualified installers may access certain parameters, in order to
adapt the boiler to special requirements. In principle, these are
factory preset for all normal applications.
CONSTRUCTION FEATURES
Outer body
The outer body containing the primary fluid is constructed from
carbon steel (STW 22).
TANK-IN-TANK accumulator/heat exchanger
The internal large surface ring-shaped inner tank for the production
of hot water is constructed from Chrome/Nickel 18/10 stainless
steel. It is corrugated over its height by an exclusive manufacturing
process and is entirely argon arc welded using the TIG (Tungsten
Inert Gas) method.
Combustion gas circuit
The gas combustion circuit is protected by paint and includes:
• Flue tubes
The HeatMaster®include 8 tubes (HeatMaster®71-101)
and 15 tubes (HeatMaster®201) in steel with an internal
diameter of 64 mm. Each tube is equipped with a stainless
steel turbulator designed to improve thermal exchange and
reduce flue gas temperature.
• Combustion chamber
The combustion chamber of the HeatMaster®models is
entirely water cooled.
Insulation
The boiler body is fully insulated by rigid polyurethane foam
with a high coefficient thermal insulation, sprayed on without the
use CFC’s.
Casing
The boiler is covered with a steel jacket which has been de-greased
and phosphated before being stove enamelled at 220 °C.
Burner
The HeatMaster®71 - 101 - 201 models are always supplied with
a low NOx air/gas pre-mix burner ACV BG 2000-M.
FROST PROTECTION
The boiler is equipped with an integrated frost protection: as
soon as the boiler temperature [NTC1 probe] drops below 7°C,
the central heating pump is activated. As soon as the NTC1
temperature is lower than 3°C, the burner ignites until the
temperature exceeds 10°C. The pump continues to turn for
approximately 10 minutes. If an outside temperature sensor
is connected, the pump is activated as soon as the external
temperature goes under the pre-defined threshold.
In order to enable the HeatMaster®boiler to protect the system
against freezing, all the valves of the radiators and the convectors
should be completely open.
PACKAGING
HeatMasters®71 and 101 are supplied completely assembled
and ready for use.
The HeatMaster®201 is supplied in four separate packages.
• Package N° 1: Foam insulated body + hydraulic accessories +
control board.
• Package N° 2: Flue reducer.
• Package N° 3: The jacket.
• Package N° 4: The burner and its cover, door insulation and
sealing cord.

EN • 5
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ENGLISHFRANCAISNEDERLANDSESPAÑOLITALIANODEUTSCH
DESCRIPTION
HeatMaster®71 / 101
1. Cold water inlet and filling loop connection
2. Auto-air vent
3. Primary NTC 1 and 2 sensors
4. Primary expansion tank (2x)
5. Filling loop connection to primary circuit
6. Low-water pressure switch
7. Thermometer bulb and pressure gauge connection
8. Primary safety valve
9. Charging pump
10. Rigid polyurethane foam insulation
11. Chimney reduction with vertical outlet
12. Turbulators
13. Heating flow
14. Domestic hot water outlet
15. Internal stainless steel tank
16. Stainless steel dry-well with ECS NTC 3 sensor
17. Primary tank
18. Flue tubes
19. Heating return
20. Drain cock
21. Combustion chamber
HeatMaster®201
1. Chimney reduction with horizontal outlet
(vertical outlet optional)
2. Cold water inlet
3. Primary NTC 1 and 2 sensors
4. T&P valve connection (optional)
5. Auto-air vent
6. Rigid polyurethane foam insulation
7. Internal stainless steel tank
8. Low-water pressure switch
9. Pressure gauge connection
10. Thermostat control bulb
11. C h a r g i n g pump (2 x )
12. Stainless steel dry-well with ECS NTC 3 sensor
13. Domestic hot water outlet
14. Heating flow
15. Filling loop connection
16. Filling of primary circuit
17. Primary expansion vessel (4x)
18. Flue gas tubes and turbulators
19. Heating return
20. Drain cock
21. Primary safety valve
22. Primary circuit tank
23. Combustion chamber
1
2
3
5
4
6
7
10
8
9
11
12
14
13
15
16
17
19
18
20
21
2
4
6
1
7
8
9
10
5
3
11
12
13
15
14
16
20
19
21
23
17
18
22

EN • 6
ENGLISHFRANCAISNEDERLANDSESPAÑOLITALIANODEUTSCH
664Y2500.B
USER GUIDE
USE OF THE BOILER
ACV recommends that the boiler is inspected and serviced, if required, at least once a year by a competent and qualified
engineer. More frequent servicing may be required depending on boiler use, if this is the case consult your installer for
advice.
Starting the burner:
In normal operation, the burner starts automatically as soon as the boiler drops below the temperature setpoint.
The user must not attempt to gain access to the components inside the control panel.
Heating circuit pressure
It may be necessary to add water to obtain the correct
pressure required in the heating system. This pressure
is displayed on the temperature-pressure gauge on the
boiler control panel.
The minimum cold fill pressure should be 1 bar. The
precise operational pressure will depend on the height
of the building (See Bringing Into Service section - Filling up of
DHW and heating circuits).
If the pressure falls to below 1 bar, the boiler low water
pressure switch will stop the boiler until the pressure is
re-established.
Safety valves
If water is discharged from one of the safety valves, stop
the boiler and call an engineer.
1. Tempera ture -pr es sure gauge
2. Display - MCBA controller
3. General switch
4. Summer/winter switch
1 2 43
HeatMaster®control panel

EN • 7
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ENGLISHFRANCAISNEDERLANDSESPAÑOLITALIANODEUTSCH
SETTING THE PARAMETERS
MCBA Display
USER GUIDE
Fault:
The temperature setting of the appliance and the safety functions of its various parts are constantly monitored by the MCBA
controller. If a fault occurs, the MCBA turns the unit off and indicates an error code: the display flashes and the first character
is an “E” followed by the fault code (see list of faults).
To reset the unit:
- Press the “reset” key on the display panel.
- If the fault code appears again, contact your contractor.
• Domestic hot water temperature instruction:
(Hot water temperature)
- Press the “mode” key once: the screen indicates “PARA”.
- Press the “step”key: the first digit is 1and the last two digits
indicate the current hot water temperature setting.
- To change this temperature, press “+” or “-” keys until the
temperature indicated by the last two digits is the desired
temperature.
- Press “store” to save the setting.
- Press the “mode” key twice to return to normal operating
mode [Stand-by).
• Enabling and disabling hot water mode:
(Hot water)
- Press “mode” once: the screen displays “PARA”.
- Press the “step” button twice: the first digit is 2and the last
two digits indicate the current setting.
00 = disabled; 01 = enabled.
- To change this parameter, press the “+” or “-” keys until you
reach the desired value:
00 = disabled; 01 = enabled.
- Press “store” key to save the setting.
- Press the “mode” key twice to return to normal operating
mode [Stand-by).
• Enabling and disabling central heating mode:
(Central heating)
- Press “mode” key once: the screen displays “PARA”.
- Press the “step” key three times: the first digit is 3and the
last two digits indicate the current setting.
00 = disabled; 01 = enabled.
- To change this parameter, press the “+” or “-” keys until you
reach the desired value:
00 = disabled; 01 = enabled.
- Press “store” key to save the setting.
- Press the “mode” key twice to return to normal operating
mode [Stand-by).
• Setting the temperature of the central heating:
(the maximum temperature for the heating circuit)
- Press “mode” once: the screen displays “PARA”.
- Press the “step” key four times: the first digit is 4and the last
two digits indicate the current temperature setting for the cen-
tral heating.
- To change this temperature, press the “+” or “-” keys until the
temperature indicated by the last two digits is the desired
temperature.
- Press “store” to save the setting.
- Press the “mode” key twice to return to normal operating
mode [Stand-by).

EN • 8
ENGLISHFRANCAISNEDERLANDSESPAÑOLITALIANODEUTSCH
664Y2500.B
TECHNICAL CHARACTERISTICS
WATER QUALITY
• Chlorides: < 150 mg/l (304)
< 2000 mg/l (Duplex)
• 6 ≤ph ≤8
HeatMaster®71 HeatMaster®101 HeatMaster®201
Central heating
Input power (Input) kW 20.0 - 69.9 25.0 - 107.0 60.0 - 220.0
Useful nominal power (output) kW 18.4 - 63.0 23.0 - 96.8 56.4 - 200.2
Maintenance loss of the nominal value at 60°C %0.60 0.65 0.30
Flue gas
Flue gas circuit loss Mbar 0.6 1.4 2.4
Net flue gas temperature °C 172 165 190
Mass flow rate of combustion products g/sec. 9.2 - 32.1 11.5 - 49.2 27,6 - 101,2
CO2natural gas % CO29.0 9,0 9.0
Gas
Gas flow rate G20 - 20 mbar M3/h 2.17 - 7.40 2.64 - 11.32 6.35 - 25.40
Gas flow rate G25 - (25 mbar) M3/h 2.46 - 8.60 3.08 - 13.17 7.38 - 29.54
Gas flow rate G31 (30 / 37 / 50 mbar) M3/h 0.82 - 2.86 0.94 - 4.50 2.45 - 9.81
Gas connection [F] Ø3/4” 1” 1”1/4
Hydraulic parameters
Max operating temperature °C 95 95 95
Total capacity L239 330 641
Heating circuit capacity L108 130 241
DHW cylinder heat exchange surface m23.14 3.95 5.30
Max operating pressure of the heating circuit Bar 333
Max operating pressure of the secondary circuit Bar 10 10 10
Primary circuit pressure drop Mbar 46 83 240
Electrical connection
Class IP 30 30 30
Supply voltage V/Hz 230 / 50 230 / 50 230 / 50
Maximum electrical consumption. W180 200 800
Drained weight Kg 282 320 550

EN • 9
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DOMESTIC HOT WATER PERFORMANCE
System operating at 80°C HeatMaster®71 HeatMaster®101 HeatMaster®201
Peak flow rate at 40°C [ΔT = 30°C] L/10’ 646 905 1745
Peak flow rate at 45°C [ΔT = 35°C] L/10’ 543 777 1489
Peak flow rate at 60°C [ΔT = 50°C] L/10’ 346 514 971
Peak flow rate at 70°C [ΔT = 60°C] L/10’ 268 385 763
Peak flow rate at 80°C [ΔT = 70°C] L/10’ 203 290 586
Peak flow rate at 40°C [ΔT = 30°C] L/60’ 2133 3172 6690
Peak flow rate at 45°C [ΔT = 35°C] L/60’ 1794 2680 5667
Peak flow rate at 60°C [ΔT = 50°C] L/60’ 1219 1813 3534
Peak flow rate at 70°C [ΔT = 60°C] L/60’ 971 1378 2554
Peak flow rate at 80°C [ΔT = 70°C] L/60’ 710 1003 1723
Continuous flow rate at 40°C [ΔT = 30°C] L/h 1835 2776 6117
Continuous flow rate at 45°C [ΔT = 35°C] L/h 1573 2379 5039
Continuous flow rate at 60°C [ΔT = 50°C] L/h 1101 1665 2914
Continuous flow rate at 70°C [ΔT = 60°C] L/h 918 1241 2128
Continuous flow rate at 80°C [ΔT = 70°C] L/h 675 903 1468
Reheat time at 60°C Minutes 23 22 23
TECHNICAL CHARACTERISTICS
Propane gas categories
DK - NL
NO - IT
BE - CH - ES
FR - UK - IE
PT - FI - SE
IT - GR
AT - CH
CZ - ES
NL - DE
LU - HU
BE - CH
ES - FR
UK - IE
IT - PT
CZ - DK - ES
FI - FR - UK
IE - IT - NL
NO - PT - SE
AT - CH
CZ - DE
FR
I 3P [G31] 30 mbar
I 3P [G31] 37 mbar
I 3P [G31] 50 mbar
I 3+ *** [G30 + G31] 28 / 30 / 37 mbar
I 3B/P *** [G30] 28 / 30 mbar
I 3B/P *** [G30] 50 mbar
(***) HeatMaster ® 201
GAS CATEGORY
Natural gas categories BE FR NL LU DE AT - CH - CZ - DK - ES - IT -
FI - UK - IE - PT - SE - GR HU
I 2E(S)B * [G20] 20 mbar - [G25] 25 mbar
I 2E(R)B ** [G20] 20 mbar - [G25] 25 mbar
I 2Er [G20] 20 mbar - [G25] 25 mbar
I 2L [G25] 25 mbar
I 2E [G20] 20 mbar
I 2ELL [G20] 20 mbar - [G25] 20 mbar
I 2H [G20] 20 mbar
I 2HS [G20] 25 mbar
(*) HeatMaster®71 - (**) HeatMaster ® 101 - 201

EN • 10
ENGLISHFRANCAISNEDERLANDSESPAÑOLITALIANODEUTSCH
664Y2500.B
ELECTRICAL CONNECTION
Electrical supply
The boiler uses a single phase supply at 230V - 50 Hz. A double
pole isolator with a 6 Amp fuse or a 6 Amp MCB must be
fitted outside the boiler to allow the power to be shut off during
servicing and before any repairs are carried out.
Compliance
The installation must comply with current technical standards and
legislation in force.
Safety
The stainless steel cylinder must be connected separately to
earth.
The power to the boiler must be isolated before any
work is carried out on it.
Alarm module
• Connect the alarm module ribbon cable “X7” to the MCBA
connector “X8”.
The volt free relays on the alarm module are activated as
described below.
1 - Alarm:
This contact closes if the MCBA is in safety shutdown position.
2 - External / burner gas valve - indication of function:
This contact closes if there is a heating request and the burner
is operating.
• Technical data:
- Ambient temperature: 0…60 °C
- Contact values: IRMS 1A
230 V (+10% / 15%) 50 Hz
If the inductor loads are connected it is necessary to
protect them against peak voltages (e.g. RC network).
Internal MCBA connections
X1: MCBA 230 V connection
X2: 24 V connector
X3: NTC connector
X4: NTC 6
X5: Communication
X7: Display connection
X8: Flat cable connection for alarm module AM3-2 and / or AM3-11
heating circuit control module
Connection
for transformer
Alarm module (AM3-2)
MCBA
1 2
X1 X2 X5X4X3
X7
X8
The AM3-2 and AM3-11 alarm modules are only an option
for the HeatMaster®71 / 101models.

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ELECTRICAL CONNECTION
Second circuit module
(AM3-11)
1 - Heating pump switch:
This switch closes when there is a heating request.
2 - Four way valve closing switch (Three ways):
This switch closes if the MCBA regulator has to close the four
(3) way valve in accordance with the heating circuit start set
point.
3 - Four way (3 way) valve opening switch:
This switch closes if the MCBA regulator has to open the four (3)
way valve in accordance with the heating circuit start set point.
From delivery the heating circuit controlled by Module
AM3-11 is de-activated; to bring into service
parameter 34 needs to be modified (50 in place of
00) see pages 20 to 22.
ATTENTION: This parameter can only be changed by
approved ACV contractors.
1 2 3
1. Alarm module flat cable connection
(option)
2. AM3-2 module (option)
3. AM3-11module (option)
2 3
1
HeatMaster®71 / 101 Panel
Codes
AM3-2 : 10800094
AM3-11 : 10800095
Alarm module kit (optional)

EN • 12
ENGLISHFRANCAISNEDERLANDSESPAÑOLITALIANODEUTSCH
664Y2500.B
1. 230 Volt supply
2. 230 Volt outlet for AM3-11module (optional)
3. Charging pump
4. Heating pump
5. General switch
6. 230 Volt - 24 Volt transformer
7. MCBA controller
8. MCBA Display
9. Ignition and ionisation cable
10. SUMMER/winter switch
11. 7 pin burner plug
12. 4 pin burner plug
13. Room thermostat (optional)
14. Low water pressure safety switch
15. Primary NTC1 temperature sensor
16. Primary NTC2 temperature sensor
17. NTC3 hot water temperature sensor
18. NTC4 external temperature sensor (optional)
19. NTC6 2nd heating circuit temperature sensor (optional)
20. Zero volt of 24V circuit
B. Blue
Bk. Black
Br. Brown
G. Grey
Gr. Green
Or. Orange
Pk. Pink
R. Red
V. Violet
W. White
Y. Yellow
Y/Gr. Yellow/Green
1 32
1 32
4 65
4 65
7 98
7 98
10 1211
10 1211
1 2 3 4 5 6 7 8 9 10 11 12 19 1 2 3 4 5 6 7 8 9 10 11 12
13 13
14 14
15 15
16 16
17 17
18 18 19
M M
t
P
BUS B
BUS A
X11.
X12.
T8 T6T7 B5B4 T2S3 T1 N L1
X1.6
X1.5
X1.4
X1.3
X1.2
X7
X10.6
X10.7
X10.1
X10.3
X1.1
X2.12
X2.11
X2.10
X2.9
X2.8
X2.7
X2.6
X2.5
X2.4
X2.3
X2.2
X2.1
X3.6
X3.5
X3.4
X3.3
X3.2
X3.1
X4.3
X4.2
X4.1
X5.4
X5.3
X5.2
X5.1
6
8
9
1 2 3 4
5
10
11
12
13
14
18
19
20
17
16
1
5
7
Y/Gr
G
R
Gr
Bk
Y
G
B
Or
Br
R
Bk
Bk Br
Br
B
Bk
Or
BBBk
Bk Y
Br
Br
G
Gr
G
Y/Gr
B
Br
Br
Br
B
Or
Br
R
Y/Gr
G
Bk
Bk
V
Y/Gr
Br
B
Bk
G
Br
Y/Gr
B
G
Y
Bk
Gr
Br
B
G
V
R
Bk
Or
V
G
V
G
Bk
Br
B
Bk
Bk
BrR
G
BB
BBBr
Br Br
Y/Gr
Y/Gr
Y/Gr
B
Br
Y/Gr
B
Br
Y/Gr
B
G
Y/Gr
B
Br
B
Br
B
Br
B Br Y/Gr B Br Y/Gr B Br Y/Gr B Br Y/Gr
WIRING DIAGRAM: Heatmaster®71 / 101
ELECTRICAL CONNECTION

EN • 13
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ENGLISHFRANCAISNEDERLANDSESPAÑOLITALIANODEUTSCH
MCBA
t
2 x 2 fils
14 x 0,25mm2
01 02 03
AM3 - 11
2 4 6
14
1 3 5
13
A1A2
BUS B
BUS A O Volt
L
N
10 11 13 14 07 08 05 04 03 02 01 06 09 12 15 21 20 22 19 23 24
28
27 26 25
X1
X2
X3
X4 X5
L1
N
T1 T2
S3
B4 B5
T6 T7 T8
M
M1
M
M2
M
M3
M
M4
M6 M N
AM3 - 2
01 02 03 04 06 05 07 08 09 10 11 12 13
14
15 16 17 18
X7
X2.8
X2.10
X3.1 X3.2 X3.3 X3.5 X3.4
X5.4 X5.3 X4.3 X4.2 X5.1 X5.2
19
X2.5 X2.9
X10
X7
X2.1
X2.11 X2.12
X2.6 X1.5 X1.6 X1.3 X1.4 X1.1 X1.2 X2.4 X2.3 X2.2
X1.1 X1.2 X2.1 X2.2 X3.1 X3.2 X1.1 X1.2 X2.1 X2.2 X3.1 X3.2
X7 X7
2 1 3 2 1 5 4
3 x 0,75
2 x 0,75
4 x 0,75
5 4 3 2 1
3 2 1
BG 2000-M/201
14 x 0,25mm2
P
16
17 18
M
M5
P
Ph
N
Ph
N
Ph
N
1
15 16 17 18 19 20
21
22
23
24
25 26
27
2 3
4
5
6
7 8
9
10
11
12 14
13
R B
Y/Gr
R B
Y/Gr
R B
Y/Gr
R B
Y/Gr
R B
Y/Gr
Y/Gr
Br B
Bk B B
Bk B Or Or B V B G B
Bk
B
W B
W B
Bk
B
W B W W B R R W Bk G V Or
R
R
W
Bk
G
V
Or
R
W
Bk
G
V
Or
B
W
B
Bk B W V R Bk Br B
Br B
G Or
Bk Br B R V W Or W G B B
G V
Bk Or
Br B W Bk Or Bk B Or Br R
Bk V
G
Bk
V W R
V
W
R
B
ELECTRICAL CONNECTION
1. General switch
2. Module AM3-11:
3. Module AM3-2:
4. MCBA controller
5. 24 Volt Transformer
6. MCBA Display
7. Room thermostat (optional)
8. Low water pressure safety switch
9. NTC1 primary temperature sensor
10. NTC2 primary temperature sensor
11. NTC3 hot water temperature sensor
12. NTC4 outside temperature sensor (optional)
13. Summer/winter switch
14. NTC6 heating circuit start sensor (optional)
15. Heating circulator (not supplied)
16. Heating circulator (not supplied) if four way
valve motor driven on AM3-11
17. Charging pump
18. Charging pump
19. Booster circulating pump
20. Motor driven four way valve
21. Alarm switch
22. External gas valve switch/burner function
23. DHW mode function switch
24. Fan (BG 2000-M / 201)
25. Gas valve (BG 2000-M / 201)
26. Gas pressure switch (BG 2000-M / 201) (optional)
27. Charging pump control relay
B. Blue
Bk. Black
Br. Brown
G. Grey
Or. Orange
R. Red
V. Violet
W. White
Y/Gr. Yellow/Green
WIRING DIAGRAM: Heatmaster®201

EN • 14
ENGLISHFRANCAISNEDERLANDSESPAÑOLITALIANODEUTSCH
664Y2500.B
INSTALLATION
DIMENSIONS
The boiler is delivered completely assembled, tested and packaged on a wood support with anti-shock edges and protected
by a heat-shrunk plastic film.
On receipt and after having removed the packaging, check that the boiler is not damaged.
For transport, please refer to sizes and weights mentioned below.
HeatMaster®71 HeatMaster®101 HeatMaster®201
AMm1743 2093 2085
BMm1630 2030 300
CMm680 680 1020
DMm937 937 1320
EMm680 680 1020
FMm390 390 600
GMm— — 1383
HMm1355 1750 590
JMm285 285 2117
KMm1720 2120 —
Weight when empty (kg] Kg 282 335 550
Heating connection [F] Ø1”1/2 1”1/2 2”
DHW connection [M] Ø1” 1” 2”
Gas connection [F] Ø3/4” 1” 5/4”
250
190
250
302
338
E
C
D
F
510
A J
G
H
B
D
G
F
E
J
HB K
A
C
C/2
HeatMaster®71 - 101 HeatMaster®201

EN • 15
664Y2500.B
ENGLISHFRANCAISNEDERLANDSESPAÑOLITALIANODEUTSCH
INSTALLATION
Min. 700 mm
Min. 100mm Min. 100 mm
INSTALLATION AREA
- Make sure that all air vents are unobstructed.
- The boiler must be placed on a non-combustible surface.
- Do not store any flammable materials in this room.
- Do not store any corrosive materials, paint, solvents, salts, chlorine products or any other detergent products in the vicinity
of this appliance.
- If you smell gas, do not operate electrical switches, close the gas valve on the meter, ventilate the rooms and contact your
installer.
ACCESSIBILITY
The appliance must be placed in such a way that it is always easily accessible. Furthermore, the unit must have the following
minimum clearance around it.
Min. 700 mm
Min. 100mm Min. 100 mm
HeatMaster®71 - 101 HeatMaster®201

EN • 16
ENGLISHFRANCAISNEDERLANDSESPAÑOLITALIANODEUTSCH
664Y2500.B
INSTALLATION
FLUE CONNECTION
- The flue connection must be carried out in compliance with the
standards in force, (example: Belgium NBN B61-001), taking
account of local energy supplier and fire regulations as well as
regulations relating to “noise pollution”.
- The flue pipe size must not be smaller than the size of the
boiler outlet connection.
Type of B23 chimney connection
The flue connection shall be achieved by means of a metal pipe
rising at an angle from the boiler towards the chimney. A flue
disconnection piece is necessary.
It must be easily removable to allow access to the flue gas tubes
for boiler maintenance.
The high performance of our boilers involves an exit of flue gas
at a low temperature. Accordingly, there is a risk that the flue
gasses may condense. In order to avoid this risk, it is strongly
recommended that your chimney is insulated.
Ventilations HM 71 HM 101 HM 201
Minimum supply of fresh air m3/h 126 194 436
High ventilation dm22,4 3,20 2,45
Low ventilation dm22,0 2,0 7,30
Ø minimum from the chimney duct
E = 5 m Ø F min. mm 189 234 350
F = 10 m Ø F min. mm 159 178 300
E = 15 m Ø F min. mm 150 150 270
Comment:
Given that regulations vary from one country to
another, the table above is given by way of indication
only.
Type C boiler connection type:
• C13: horizontal balanced flue connection
• C33: vertical balanced flue connection
• C53: connection in different pressure zones
• In concentric connection, the total length of the
connection is limited to 6 metres.
• In parallel connection, the total length of the
connection is limited to 12 metres.
A condensate recovery device must be provided for in
the boiler flue outlet, so as to avoid flue condensate
entering the boiler.
To avoid condensation water flowing from the terminal,
all horizontal pipe lengths must fall back towards the
boiler.
The total load loss (air inlet + flue gas outlet) cannot
exceed the value (Pa) indicated in the table below showing the
pressure drops for the various components.
PRESSURE DROP TABLE HeatMaster®71 HeatMaster®101 HeatMaster®201
Air
80 mm
Flue gases
150 mm
Air
100 mm
Flue gases
150 mm
Air
150 mm
Flue gases
250 mm
Straight pipe 1 m 636433
90° bend 15515101410
45° bend 61626—
Condensates recovery device —2—4—5
Terminal 20 10 10 10 22 20
Maximum pressure drop. (Pa) 100 100 130
This table is based on ACV equipment and cannot be applied elsewhere.

EN • 17
664Y2500.B
ENGLISHFRANCAISNEDERLANDSESPAÑOLITALIANODEUTSCH
INSTALLATION
C53
B23C53
AA
A
B
D
C
F
E
C13
150 min.
120
C33
C33
A. High ventilation
B. Low ventilation
C. Draught regulator
D. Inspection cover
E. Height of the lined chimney
F. Diameter of the chimney
HeatMaster®71 - 101
HeatMaster®201
C53
B23
D
C53
AA
A
B
C
F
E
A. High ventilation
B. Low ventilation
C. Draught regulator
D. Inspection cover
E. Height of the lined chimney
F. Diameter of the chimney

EN • 18
ENGLISHFRANCAISNEDERLANDSESPAÑOLITALIANODEUTSCH
664Y2500.B
INSTALLATION
DOMESTIC HOT WATER CONNECTION
The DHW tank (secondary) must filled and pressurised
before filling and pressurising the heating circuit
(primary).
The HeatMaster®can be connected directly to the DHW
circuit.
Flush the system before connecting the DHW circuit.
The system must be equipped with an approved safety unit
including a 7 bar safety valve, a non-return valve and a stop
valve.
During the heating process, the domestic water expands and
the pressure increases. As soon as the pressure exceeds the
safety valve setting, the valve opens and ejects a small quantity
of water. The use of a DHW expansion tank, which must be
calculated according to storage volume, will avoid this and
reduce water hammer.
The hot water will reach temperatures greater
than 60°C, which can cause burns.
Therefore, the installation of a temperature
control valve on the hot flow immediately after
the appliance is advised.
If stop valves are used in the installation, they can cause
pressure waves when they are closed.
To avoid this, use devices to reduce water hammer.
123
4
5
26
7
8
9
10
11
Example of connection
of HeatMaster®+ storage cylinder
Recommended for applications requiring a high peak flow rate.
Example of parallel connection
Recommended for applications with high continuous flow rate.
So as to balance out the passage of water in the
three boilers, equalising valves are compulsory in this
type of system.
Example of series connection
Preferable for high temperature applications with up to three
units.
If there is a risk of low pressure in the hot water
circuit (installation of HeatMaster®on the roof of a
building), it is essential to install a vacuum breaker
device onto the cold water supply.
1. Stop valve
2. Non-return valve
3. Pressure reducer
4. Safety valve
5. Domestic hot water expansion tank
6. Secondary circulation pump (if fitted)
7. Temperature control valve
8. Hot water outlet
9. Drain down valve
10. Stop valve for cleaning
11. Primary circuit filling valve
12. Temperature and pressure safety valve (UK only)

EN • 19
664Y2500.B
ENGLISHFRANCAISNEDERLANDSESPAÑOLITALIANODEUTSCH
INSTALLATION
1
423
6
5
4
9
7
8
1. Four way mixer valve
2. Circulator
3. Non-return valve
4. Heating isolating valves
5. Safety valve calibrated to 3 bar, with pressure gauge
6. Expansion tank
7. Drain valve
8. Primary circuit filling valve
9. MCBA Regulator, AM3-11 module
9. Pipe sensor (optional)
HEATING CONNECTION
The DHW tank (secondary) must filled and pressurised
before filling and pressurising the heating circuit
(primary).
The HeatMaster®has two couplings at the rear which can serve
as a central heating circuit connection.
Coupling to a heating distribution network may reduce the hot
water performance.
Expansion
The HeatMaster®201models are equipped with 4 8L tanks.
The expansion tanks are sized only for the “hot water” function.
In the case of primary circuit connection, it is necessary to
calculate the expansion capacity necessary for the total heating
system volume (Refer to the expansion tank manufacturer’s technical
instructions for a broader explanation).
The pressure of the HeatMaster®expansion tanks
must be adjusted to the same pressure as the
heating circuit expansion tanks.
GAS CONNECTION
- The HeatMaster®71/101/201 boilers are equipped with
a BG 2000-M 71/101/201burner with a gas Ø 3/4” - 1”
and 1”1/4 connection [F] to connect a gas supply valve.
- The gas connections must comply with all applicable
standards (in Belgium: NBN D51-003).
- If there is a risk of dirt stemming from the gas network,
place a gas filter upstream of the connection.
- Purge the gas pipe and carefully check that there are no
leaks on the boiler’s internal and external pipes.
- Check the system’s gas pressure. Please refer to the
technical data table.
- Check the gas pressure and consumption when
commissioning the appliance.
ATTENTION
The primary safety valve is supplied with a plastic
discharge tube - this is a temporary fitting and should
be replaced.
The safety valve must be connected to the drain by a
rigid tube, in copper for example.
If a low heating temperature is required, the use of the
kit (code: 10800099) is required.
HeatMaster®201
A
B
HeatMaster®71 - 101
B
A
Connection for filling
A. Cold inlet connection and filling point.
B. Primary circuit filling point (heating).

EN • 20
ENGLISHFRANCAISNEDERLANDSESPAÑOLITALIANODEUTSCH
664Y2500.B
BURNER CHARACTERISTICS
AIR/GAS PRE-MIX BURNERS
ACV BG 2000-M
Description
The power continually adjusts itself according to demand; this
greatly improves the operating efficiency for heating and hot
water.
The burner tube is covered with a metal fibre (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 flame 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 offset
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 differential
created at the neck of the venturi tube by the airflow rate induces
gas intake proportional to its level (the larger the air flow rate,
the greater the differential 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 reactions as those
described before causing burner stop in safety mode.
• The BG 2000-M burner installed on HeatMaster®models is
controlled by a MCBA Honeywell controller which manages
both the burner safety function and its modulation according
to temperature.
Air/gas mix control principle
A
C
E
D
B
G
F
3 - 5
15
HeatMaster®71 - 101
3 - 5
1
5
HeatMaster®201
A. Air
B. Gas
C. Venturi tube
D. Fan
E. Air - Gas mix
F. O f f s e t a d ju s t me n t s c r ew
G. Gas flow rate adjustment screw