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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.

1

INTRODUCTION

2

1.1

People who should read these instructions

2

1.2

Symbols

2

1.3

Applicable standards

2

1.4

Warnings

2

2

INSTALLATION

3

2.1

Boiler room

3

2.2

Connections

3

2.3

Oil supply

5

2.4

Electrical connections

6

3

STARTING UP

7

3.1

Filling the heating and domestic hot water circuits

7

3.2

Troubleshooting the burner

7

4

SERVICING

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

5

DESCRIPTION

9

5.1

Overview

9

5.2

Description of operation

9

5.3

Build features

10

6

TECHNICAL 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

7

USER 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.

Summary of Contents for Delta 25

Page 1: ...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 ...

Page 2: ...4 Servicing the burner 8 4 6 Emptying the boiler 8 4 7 Spare parts 8 5 DESCRIPTION 9 5 1 Overview 9 5 2 Description of operation 9 5 3 Build features 10 6 TECHNICAL 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 7 USER G...

Page 3: ...n 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 thermost...

Page 4: ...egulations 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 Therm...

Page 5: ...d 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 1 20 40 1 5 40 80 2 60 100 L m Ø int Ø int H m 8 mm 10 mm 0 35 100 0 5 30 100 1 25 100 1 5 20 90 2 15 70 2 8 30 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...

Page 6: ... Fig 9 Control panel It is important to switch the boiler off before carrying out any work 2 4 1 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 ...

Page 7: ... repair work switch the power off at the mains switch fitted in the boiler room by the electrician 2 1 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 contro...

Page 8: ...e 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 pressu...

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