ACV Delta F25 Owner's manual

Installation, Operating and
Servicing Instructions
delta
excellence in hot water
delta
performance
performance
11/06/2004 - 66400000
Combination boiler
25 / 35 / 45 / 55
F25 / F35 / F45 / F55
G25 / G35 / G45 / G55

1.1 PEOPLE WHO SHOULD READ THESE
INSTRUCTIONS
These instructions should be read by: - the specifying engineer
- the installation engineer
- the user
- servicing technicians
1.2 SYMBOLS
The following symbols are used in these instructions:
Essential to ensure that the system works
properly.
Essential for personal safety and
environmental protection.
Danger of electrocution.
Danger of burns.
1.3 APPLICABLE STANDARDS
The products have been granted the “EC” certificate in accordance
with the standards in force in different countries (European Directives,
92/42/EEC “efficiency” and 90/396/ECC “gas devices”). These
products have also been granted the Belgian “HR+”(gas boilers) and
“OPTIMAZ” (oil boilers) marks.
1INTRODUCTION 2
1.1 People who should read these instructions 2
1.2 Symbols 2
1.3 Applicable standards 2
1.4 Warnings 2
2INSTALLATION 3
2.1 Boiler room 3
2.2 Connections 3
2.3 Oil supply 5
2.4 Electrical connections 6
3STARTING UP 7
3.1 Filling the heating and domestic hot water circuits 7
3.2 Troubleshooting the burner 7
4SERVICING 7
4.1 Recommendation 7
4.2 Servicing the gas boiler 7
4.3 Servicing the oil boiler 7
4.4 Servicing the safety devices 7
4.4 Servicing the burner 8
4.6 Emptying the boiler 8
4.7 Spare parts 8
5DESCRIPTION 9
5.1 Overview 9
5.2 Description of operation 9
5.3 Build features 10
6TECHNICAL SPECIFICATIONS 11
6.1 Effective dimensions 11
6.2 Maximum operating conditions 11
6.3 Domestic hot water performance 11
6.4 Boiler without burner 11
6.5 Boiler with ACV oil burner 12
6.6 Boiler with ACV BG 2000-S gas burner 13
7USER GUIDE 14
7.1 Using the boiler 14
7.2 Boiler room 15
INDEX 1 INTRODUCTION
2
1.4 WARNINGS
These instructions are an integral part of the equipment to which they
refer and the user must be provided with a copy.
The product must be installed and serviced by qualified engineers, in
compliance with current standards.
ACV cannot accept liability for any damage resulting from incorrect
installation or from the use of components or fittings not specified by ACV.
Any failure to follow instructions relating to tests and
test procedures may result in personal injury or risks of
pollution.
Because of their high level of performance our boilers
produce flue gas discharge at low temperatures. This
can cause condensation in some chimney flues. Your
installing engineer will advise you whether you need to
install a flue pipe in your chimney.
N.B.
ACV reserves the right to change the technical specifications and
components of its products without prior notice.

2.1 BOILER ROOM
2.1.1 ACCESSIBILITY
The boiler room must be large enough to allow proper access to the
boiler. The following minimum distances (mm) around the boiler are
required:
- at the front 500 - at the sides 100
- at the rear 150 - above 700
2.1.2 VENTILATION
The boiler room must be fitted with top and bottom vents as shown in
the table below.
2.1.3 BASE
The boiler must be laid on a base made of non-combustible materials.
2.2 CONNECTIONS
2.2.1 CHIMNEY CONNECTION
The boiler can be connected to a suitable flue or to chimney by a metal
pipe rising at an angle from the boiler to the chimney. It must be easily
removable in order to give access to the flue pipes when servicing the
boiler. A draught regulator must be installed on the chimney in order to
stabilise negative pressure.
Because of their high level of performance our boilers
produce flue gas discharge at low temperatures. This
can cause condensation in some chimney flues. Your
installing engineer will advise you whether you need to
install a flue pipe in your chimney.
Important
Boilers must be installed by an approved engineer, in
accordance with current local standards and regulations.
2.2.2 CENTRAL HEATING CONNECTION
2.2.2.1 Examples of basic circuit configurations
The drain cock and safety valve must be connected to the waste
water disposal system.
1. Motorised 3-way manual mixer valve
2. Safety valve preset to 3 bar with pressure gauge
3. Circulator
4. Non-return valve
5. System filling valve
6. Expansion tank
7. Room thermostat (fig. 2)
8. ACV 13 controller (see controller kit on page 5) (fig. 3)
9. Central heating isolation valve
10. Discharge outlet
Fig. 2: Hydraulic diagram showing circulator controlled
by a room thermostat.
2INSTALLATION
6
23
47
5
99
10
1
6
23
48
5
99
10
Fig. 3: Hydraulic diagram with motorised mixer valve
Fig. 1: Boiler room ventilation and chimney connection
A
B
F
D
C
E
A. Top vent
B. Bottom vent
C. Draught regulator
D. Inspection cover
E. Chimney height
F. Chimney diameter
3
Ventilation 25-F25 35-F35 45-F45 55-F55 G25 G35 G45 G55
Min. fresh air
requirement m3/h 50/66 66/90 84/122 100/138 45 63 81 99
Top vent (A) dm222221,5 1,5 1,5 1,5
Bottom vent (B) dm21,5 1,5 1,5 1,5/2,1 1,5 1,5 1,5 1,7
Chimney
E = 5m Ø min.F mm 158/182 182/213 208/248 226/266 160 189 215 236
E = 10m Ø min.F mm 133/153 153/179 175/209 190/223 135 159 181 199
E = 15m Ø min.F mm 130/138 138/162 158/188 172/202 130 143 163 179

2.2.2.2 ACV hydraulic kit
ACV offers an optional pre-assembled hydraulic kit comprising:
- A circulator.
- A motorised 3-way manual valve.
- Connecting pipes including an optional second circuit.
- Two isolation valves.
- Connectors for mounting the safety valve with pressure gauge
and the filling valve to the right or left of the expansion tank.
2.2.2.3 Discharge
The drain cock and safety valve must be connected to the waste
water system in accordance with current regulations.
2.2.3 DOMESTIC HOT WATER CONNECTION
2.2.3.1 Pressure reducer
If the water mains pressure is greater than 6 bar, a pressure
reducer calibrated to 4.5 bar must be fitted.
2.2.3.2 Safety unit
The tank safety unit must be ACV approved and calibrated to 7
bar.The valve discharge must be connected to the waste water
system in accordance with current regulations.
2.2.3.3 Domestic hot water expansion tank
Installing a hot water expansion tank avoids any risk of pressure
surges due to waterhammer.
2.2.3.4 Hot water circulation
If the tank is located a long way from the point of use, then
installing a closed recirculation circuit ensures that a faster supply
of hot water is always available.
2.2.3.5 Description
1. Safety unit
2. Pressure reducer
3. Thermostatic mixing valve
4. Hot water circulator
5. Non-return valve
6. Domestic hot water type expansion tank
7. Inlet valve
8. Draw-off valve
9. Bleed valve
IMPORTANT
As a safety measure against burns, we strongly advise
installing a thermostatic mixing valve (recommended
temperature: 60° C).
This is available as an optional accessory
2INSTALLATION
Fig. 4: Assembly with the ACV hydraulic kit
Fig. 5a: Connection without thermostatic mixing valve
1
2
4
6
5
7
9
8
1
2
3
4
6
5
7
9
8
Fig. 5b: Connection with thermostatic mixing valve
4
Safty unit Ø 3/4”
Pressure reducer Ø 3/4”
Thermostatic mixing valve Ø 3/4”
Expansion tank 5 litres

Wiring diagram for ACV controller kits (fig. 7)
2INSTALLATION
20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
bl n/z br
SQK 349
QAAD50
(QAAD70) QAC32 QAD22
P1 B5 B9 B3 B2
P1Y1Y2NB5B9B3B2
B2. Wall-mounted temperature detector
B9. External sensor
B5. Analogue/digital room thermostat
P1. Central heating pump
Y1/Y2/N. Mixing valve (SQK349)
bl. Blue N
n/z. Black Y2
br. Brown.Y1
N
230V / 50 Hz
L1
230V
5
2.3 OIL SUPPLY
2.3.1 INSTALLATION WITHOUT RETURN
2.3.2 INSTALLATION WITH RETURN
Fig. 8a: Oil supply without return
Fig. 8b: Oil supply with return from either top
or bottom mounted tank
L1
L1
H
H
max 4m
H
max 4m
L1
L (m)
Ø int. Ø int.
H (m) 8 mm 10 mm
0,5 10 20
12040
1,5 40 80
260100
L (m)
Ø int. Ø int.
H (m) 8 mm 10 mm
035100
0,5 30 100
125100
1,5 20 90
21570
2830
3,5 6 20
Fig. 5b: kit 1
Fig. 5b: kit 2
2.2.4 CONTROLLER KITS
KIT 1: ACV 13.00 / Basic
Basic kit for regulating initial flow temperature according to
weather conditions.
It comprises: a temperature regulator with analogue clock,
wall-mounted water temperature sensor (-30/130° C), external
sensor (-30/50° C), 3-pin servomotor SQY 31 230 V and an
intermediate base.
KIT 1: ACV 13.00 / Standard
Basic kit for regulating initial flow temperature according to
weather conditions.
It comprises: a temperature regulator with analogue clock,
wall-mounted water temperature sensor (-30/130° C), external
sensor (-30/50° C), 3-pin servomotor SQY 349,230 V and an
intermediate base.

2INSTALLATION
6
2.4 ELECTRICAL CONNECTION
2.4.1 DESCRIPTION OF POWER SUPPLY
The boiler operates on single phase 230 V – 50 Hz. An on-off switch
box with 6 A fuses must be fitted outside the boiler to allow power to
be shut off during servicing and before any repairs are carried out on
the boiler.
2.4.2 COMPLIANCE
Boiler installation must comply with current local standards and
legislation.
2.4.3 SAFETY
The stainless steel tank must be earthed separately.
2.4.4 BURNER ELECTRICAL CONNECTION
The burner is powered through a 3-core cable, which is plugged into
the connector in thelower right hand corner of the burner chamber
plate. Details of how to connect it up aregiven in the technical
instructions for the burner.
Fig. 9 Control panel
It is important to switch the boiler off before carrying out
any work.
241 3 5
1. Boiler thermostat (60/90° C)
2. On/off switch
3. Summer/Winter selector switch
4. Thermometer
5. Controller (optional)
6. Safety thermostat (95° C max.)
7. Safety thermostat (103° C max.)
8. Plug for power and control
9. Central heating circulator connection
10. Burner connection
11. Room thermostat
M. Brown
O. Orange
N. Black
B. Blue
T. Green-yellow
G. Grey
J. Yellow
Fig. 10 a: Boiler wiring
1
2
C
L1
L1
N
T1
T
2
N
T1
T2
S3
S3
7
6
2
1
3
2
30
V-
50
Hz
6A
9
M
B
O
B
N
O
B
B
O
N
T
11
S3
B4
N
T1
T2
L1
M
M
8
1
0
Fig. 10 c: Gas burner
123456789101112
S3
B4
N
T2
T1
L1
PH
PF
VM2
VM1
T
AL
CF
N
M
1
0
Fig. 10 b: Oil burner
L1
N
1
23456789101112
S3
B4
N
T2
T1
L1
1
0
J
V
G
B
M
N
M
MGJNVB
B
M
PH: Phase
N: Neutral
M: Motor
VM 1: Magnetic valve 1
VM 2: Magnetic valve 2
PF: Oil preheating
T: Ignition transformer
AL: Alarm
CF: Photoelectric cell

3.1 FILLING THE HEATING AND DOMESTIC
HOT WATER CIRCUITS
1. Fill the domestic hot water circuit and bring it up to pressure.
IMPORTANT
The hot water tank must be pressurised before the
heating circuit is filled.
2. Fill the heating circuit taking care not to exceed the 2 bar
pressure limit.
3. Bleed the air from the top of the boiler.
4. After bleeding the air out of the system, bring the pressure up to the
static pressure (height) plus 0.5 bar: 1.5 bar = 10 m – 2 bar = 15 m.
5. Check the power connection, the boiler room ventilation and ensure
that there are no leaks in the flue gas discharge pipes.
6. Set the thermostat (1) to between 60 and 90° C.
3 STARTING UP 4 SERVICING
Fig. 11: Control panel
7. Set the Summer/Winter selector switch (3) to the desired position.
8. Switch the on/off switch (2) to the ON position.
9. Check the pressure of the gas supply when starting up.
10. For the oil burner check the oil supply (and return).
Carry out any bleeding, measuring and adjustment work which
may be necessary.
3.2 TROUBLESHOOTING THE BURNER
3.2.1 ACV BG 2000-S GAS BURNER
Please refer to the servicing and troubleshooting instructions for the
burner.
3.2.2 ACV OIL BURNER
Please refer to the servicing and troubleshooting instructions for the
burner.
Before carrying out any servicing or repair work, switch
the power off at the mains switch fitted in the boiler room
by the electrician.
21 3
4.1 RECOMMENDATION
ACV recommend that boilers should be serviced at least once a year.
The burner must be serviced and tested by a competent engineer.
4.2 SERVICING THE BOILER
1 - Switch the power off at the mains switch outside the boiler and
close the gas tap.
2 - Set the on/off switch on the control panel to the OFF position.
3 - Release and remove the chimney flue (1) to free the top of the
boiler.
4 - Remove the jacket top (2) and lift off the flue reducer (3).
5 - Remove the baffles (4) from the flue pipes (5) for cleaning.
Replace them if they are in poor condition.
6 - Remove the chamber plate (6).
7 - Brush the flue pipes (5).
8 - Clean the burner chamber (7) and the burner (8).
9 - Check the insulation on the chamber plate (6)
1. Chimney flue
2. Jacket cover
3. Chimney flue reducer
4. Baffles
5. Flue pipes
6. Chamber plate
7. Combustion chamber
8. Burner
Fig. 12: Description of the main components
which require servicing.
4.3 SERVICINGTHE OIL BOILER
-Switch the power off at the mains switch outside the boiler and
close the oil inlet.
-Proceed following instructions 2 to 9 in paragraph (4.2 Servicing
the gas boiler).
4.4 SERVICING THE SAFETY DEVICES
-Check that all thermostats and safety devices are working properly:
boiler thermostat, cut-off thermostat and manually reset safety
thermostat.
-Check the safety valves on both the central heating and the hot
water circuits.
7
3
2
5
4
7
1
6
8

4.5 SERVICING THE BURNER
4.5.1 OIL BURNER
-Check the main filter on the oil line and clean it if necessary.
-Check the nozzle line:check, clean or change the nozzle and filter,
check that it is clean and that the electrodes and flame holder are
properly set.
-Replace the whole unit and check that the safety devices are
working properly
-Adjust the combustion parameters.
4.5.2 GAS BURNER
-Check and clean the burner and the electrodes.
-Check that the safety devices are working properly.
4.6 EMPTYING THE BOILER
4.6.1 EMPTYING THE PRIMARY CIRCUIT (CENTRAL HEATING):
1. Switch the power to the boiler off at the mains switch installed by
the electrician.
2. Close the boiler system’s isolating valves (1).
3. Connect a hose to the drain cock (2).
Make sure that it is properly attached.
4. Open the drain cock and let the hot water drain out.
5. When the boiler is empty, return the valves to their initial positions
4.6.2 EMPTYING THE DOMESTIC HOT WATER TANK:
1. Switch the mains power to the boiler off at the external switch
installed by the electrician.
2. Remove the pressure from the primary circuit.
3. Close valves (A) and (B).
4. Open valves (C) and (D) (first C then D).
5. Let the water drain away.
6. After emptying, return the valves to their initial positions.
To allow the tank to be emptied, valve (C) must be
situated at ground level.
4.7 SPARE PARTS
Please refer to the specific document available from ACV or your
distributor.
4SERVICING
Fig. 13a: Emptying the primary circuit
Fig. 13b: Emptying the hot water circuit
11
2
A
C
B
D
8