ACV N-Mini, N 1, N 2, N 3 Installation, operating and maintenance Instructions
Installation, operating and
maintenance Instructions
N-Mini / N 1 / N 2 / N 3
ENGLISHFRANCAISNEDERLANDSESPAÑOL
664Y1000.C
EN • 1
INDEX
INTRODUCTION 3
Who should read these instructions 3
Symbols 3
Applicable standards 3
Important notes 3
ENGLISHFRANCAISNEDERLANDSESPAÑOL
USER GUIDE 4
Use of the boiler 4
Setting the burner to safety mode 4
DESCRIPTION 5
General description 5
Operating principle 5
Design characteristics 5
Boiler views and key to parts 5
TECHNICAL CHARACTERISTICS 6
General 6
Operating condition limits 6
Dimensions 6
Hot water output data 6
General characteristics 6
BURNER CHARACTERISTICS 13
Description of the burner 13
Factory settings parameters 14
Burner dimension 14
COMMISSIONING 15
Filling the hot water and heating circuits 15
Using the boiler for the first time 15
MAINTENANCE 15
Recommendation 15
Boiler maintenance 15
Safety equipment maintenance 15
Draining the boiler 15
SPARE PARTS See at the end of this manual
INSTALLATION 7
Boiler room 7
Chimney connections 7
Fuel oil supply 7
Heating connection 8
Hot water connection 8
Electrical connections 9
Control kit 10
N + Smart installation with ACV control 11
664Y1000.C
EN • 2
INTRODUCTION
WHO SHOULD READ THESE INSTRUCTIONS
These instructions should be read by:
- the specifying engineer
- the installer
- the user
- the service engineer
SYMBOLS
The following symbols are used in these instructions:
Important instructions for correct operation of the
installation.
APPLICABLE STANDARDS
The products described in this document have been certified at
European level (European Directive 92/42/EEC «Efficiency»). They
have also been awarded the Belgian “OPTIMAZ” LABEL (fuel oil
boiler).
ENGLISHFRANCAISNEDERLANDSESPAÑOL
Essential instructions to ensure the safety of
persons and the environment.
Danger of electrocution.
DANGER
HOT
IMPORTANT NOTES
These instructions are an integral part of the equipment to which
they relate and must be handed to the user.
The product must be installed and serviced by qualified engineers
in accordance with the regulations in force.
ACV 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 ACV.
Failure to follow the instructions describing the
test operations and procedures may cause injury to
persons or risks of environmental pollution.
N.B.:
ACV reserves the right to change the technical characteristics and
specification of its products without notice.
Danger of burning.
664Y1000.C
EN • 3
USER GUIDE
USE OF THE BOILER
To ensure that your system operates correctly, please
have it serviced annually by a qualified engineer;
servicing should be completed before the start of the
heating season.
ENGLISHFRANCAISNEDERLANDSESPAÑOL
Starting the burner:
in normal operation the burner starts automatically if
the temperature of the boiler is below the set point.
Before carrying out any work on the boiler, isolate it
from the electrical supply at the switch on the external
control box.
Also place the main switch on the control panel to
“OFF”.
You should familiarise yourself with the control panel
(fig. 1)
The user must not attempt to gain access to the
components inside the control panel.
1. Control thermostat
When the boiler is used for heating only, the boiler temperature may
be set at 60 to 90°C. If the boiler is used to generate domestic hot
water and heating, the boiler’s control thermostat should be set at
80°C to ensure optimum operating conditions.
2. Main switch
Use this switch to turn the boiler on and off.
45
30
60
15
31
75
0
0
9
°C
fig. 2 : N-Mini Control panel
Pump operation:
The pump is controlled by a reset high limit thermostat, which is
located at the rear of the boiler. This is pre-set at 45°C. When the
boiler starts up, it delays the activation of the boiler pump, thereby
preventing any risk of corrosion in the combustion chamber.
Gauge pressure of the heating system
Your system must be fitted with a heating safety valve calibrated to
3 bars.
Ensure that the system is always under water pressure. When the
system is cold and the air inside it has been vented, the gauge
must indicate a pressure between 0.5 and 1.5 bar depending on
the height of the building.
To add water: (refer to Fig. 10 on Page 8)
• Open the filling valve (5).
• Close the valve properly after filling.
• Vent the system in order to obtain an accurate reading of the
pressure inside the heating circuit.
Safety valves (heating circuit)
If water is found to be escaping from one of the safety valves, stop
the boiler and contact your installer for advice.
A monthly test is recommended:
Lift the lever on the drain cock for a few seconds to ensure that the
safety valve is working correctly.
3. Summer/Winter switch
Use this switch to start and stop the heating pump.
4. Thermostat-pressure gauge
This gauge shows the temperature of the boiler and the pressure in
the primary heating circuit. The temperature must not exceed 90°C.
If it rises above this point, turn off the boiler and check the settings
on the thermostat. If the problem persists, call a technician.
The pressure must not fall below 1 bar. If it does fall below this point,
look up the section entitled “Gauge pressure of the heating installation”
in this section below.
5. Manual reset high-limit thermostat
If the boiler temperature exceeds 103°C, this safety device will be
enabled. The boiler temperature must drop below 60°C to re-start.
Unscrew the cover and press the re-start key with a pen or an object
with a similar sharp point. Replace the cover. If the fault persists,
turn off the boiler and call a technician.
60
90
If there is a problem after this short test, please
contact your installer for advice.
The water escaping from the safety valve can
DANGER
be extremely hot and cause serious burns.
HOT
BURNER SHUTDOWN
If the burner is not working:
1. The burner indicator lamp lights up.
2. Press the burner reset button (Fig. 3) on the burner. Turn the
boiler off for several seconds at the main switch, then restart the
boiler.
3. If the burner still does not work, rearm the manual reset highlimit
thermostat on the control panel (Fig. 4).
4. If the anomaly persists, please contact your installer.
664Y1000.C
25143
fig. 1 : Control panel
fig. 3 fig. 4
EN • 4
DESCRIPTION
GENERAL DESCRIPTION
• Model N is a single boiler (heating).
• Equipment required: a water connection kit for the heating circuit
supply
(optional).
• The N-Mini control panel includes a control thermostat and a
thermostat pressure gauge.
• The control panel on N 1 - 2 - 3 boilers includes a main switch,
a Summer/Winter switch, a thermostat pressure gauge, a control
thermostat and a manual reset high-limit thermostat.
• The N boiler can be connected directly to the chimney using a
B23 chimney connector.
• N-Mini Model: output of 16.6 kW.
• N1 Model: Outputs in the range 20 to 25 kW.
• N2 Model: Outputs in the range 28 to 36 kW.
• N3 Model: Outputs in the range 36.5 to 51 kW.
OPERATING PRINCIPLE
Simple to control, safety assured
The temperature of the water in both the heating circuit and the hot
water circuit is regulated by a single control. This is achieved by
means of the control thermostat and the bulb is located beside the
boiler outlet. switch.
Casing
The boiler is covered with a steel casing that has been stove enamelled
at 220°C after scouring and phosphating.
BOILER VIEWS AND KEY TO PARTS
1. Top cover
2. Heating outlet
3. Heating return
4. Chimney connection
5. Heating circuit
6. Combustion chamber
7. Boiler drain cock
8. Fuel oil burner
9. Left-right removable burner chamber plate
10. Exchanger (flue ways)
11. Front panel
12. Control panel
12
12
11
10
3
4
ENGLISHFRANCAISNEDERLANDSESPAÑOL
• A manual reset high-limit thermostat locks the burner if the
primary water temperature reaches 103°C.
• A minimum thermostat, fitted at the rear of the boiler, and preset
at 45°C, delays the activation of the boiler pump. This prevents
any risk of corrosion in the combustion chamber.
Generation of domestic hot water
Boiler N can be combined with the Smart tank (100L) superimposed
with the boiler or with any other ACV tank.
DESIGN CHARACTERISTICS
Outer body
The outer body which holds the primary water is made from STW 22
heavy gauge steel.
Flue ways
The boiler’s flue ways can be accessed from the front and include
a set of removable turbulators, in either stainless steel or chrome,
which have been specially designed to provide the optimum
combustion efficiency.
Combustion chamber
The boiler features a large, water-cooled combustion chamber to
guarantee a good flame.
Removable burner chamber plate
The chamber plate is fitted on a hinge (left or right) and made from
STW 22 steel. It is protected from the flame by a ceramic fibre
padding and a vermiculite brick.
9
8
756
fig. 5
Insulation
The burner body is insulated with rock wool padding (50mm thick).
664Y1000.C
EN • 5
TECHNICAL CHARACTERISTICS
GENERAL
The appliances are supplied fully assembled, tested and packed
standing on a timber base with impact protection strips and wrapped
in heat-shrunk plastic film. When the appliance arrives, remove the
packaging and check that no parts have been damaged in transit.
Refer to the dimensions and weights listed below for handling
ENGLISHFRANCAISNEDERLANDSESPAÑOL
purposes:
DIMENSIONS
G
E
Ø
D
OPERATING CONDITION LIMITS
Maximum service pressure (tank filled with water)
- Heating circuit: 3 bar
- Domestic hot water circuit : 10 bar (*)
Test pressure (tank filled with water)
- Heating circuit: 4,5 bar
- Domestic hot water circuit : 13 bar (*)
Operating temperature
- Maximum temperature: 90°C
(*) if the boiler is connected to a domestic hot water production tank.
C
B
F
A
A mm B mm C mm D Ø mm E mm F mm G mm Kg (*)
N-Mini
N 1
N 2
N 3
The weights shown are the drained weights.
(*)
370 565 495 80 425 357 187 62
470 700 566 130 550 445 260 108
470 765 566 130 615 510 260 122
530 805 656 150 645 550 260 157
DOMESTIC HOT WATER PERFORMANCE “N + SMART (100 L)” N 1 N 2
Operating conditions at 85°C
Peak flow at 45°C (ΔT = 35°C)
Peak flow at 60°C (ΔT = 50°C)
L/10’
L/10’
202 202
117 117
GENERAL CHARACTERISTICS N-Mini N 1 N 2 N 3
Input
Output
Pressure loss of the flue gas circuit
Heating circuit capacity
Heating connection (female)
664Y1000.C
kW
kW
mbar
EN • 6
18.4 22.0 / 28.0 30.4 / 40.0 40.0 / 57.0
16.6 20.0 / 25.0 27.0 / 35.7 36.5 / 51.0
0.11 0.15 0.17 0.15
17 31 37 53
L
3/4” 1” 1” 1” 1/4
Ø
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