Hamworthy F40H, F50H, F60H, F70H, F85H Installation, Commissioning And Operating Instructions

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FLEET SERIES BOILERS

Floor Standing, Condensing , Room Sealed,

Fully Modulating, Pre-Mix,

Gas Fired Boilers for Heating & Domestic

Hot Water Installations

Installation, Commissioning

and Operating Instructions

Models: F40H, F50H, F60H, F70H, F85H, F100H,

F125H & F150H

NATURAL GAS I2H

IMPORTANT NOTE

THESE INSTRUCTIONS MUST BE READ

AND UNDERSTOOD BEFORE INSTALLING,

COMMISSIONING, OPERATING OR

SERVICING EQUIPMENT

Page 2

Page 3

FLEET SERIES BOILERS

Floor Standing, Condensing , Room Sealed,

Fully Modulating, Pre-Mix,

Gas Fired Boilers for Heating & Domestic

Hot Water Installations

Installation, Commissioning

and Operating Instructions

Models: F40H, F50H, F60H, F70H, F85H, F100H,

F125H & F150H

NATURAL GAS I2H

NOTE: THESE INSTRUCTIONS MUST BE READ AND UNDERSTOOD BEFORE INSTALLING, COMMISSIONING, OPERATING OR SERVICING EQUIPMENT.

THE FLEET BOILER IS INTENDED FOR USE AS A COMMERCIAL APPLIANCE AND IS NOT CERTIFIED FOR USE IN DOMESTIC APPLICATIONS.

THIS BOILER IS FOR USE ON GROUP H NATURAL GAS (2 ENSURE RELEVANT INFORMATION REQUIRED WITHIN DOCUMENT IS FOUND BEFORE FIRING BOILER.

COUNTRY OF DESTINATION : UNITED KINGDOM & REPUBLIC OF IRELAND

THIS BOILER COMPLIES WITH ALL RELEVANT EUROPEAN DIRECTIVES. PRODUCT IDENTIFICATION No. 86CM36

PUBLICATION NO. 500001212 ISSUE ‘G’ MARCH 2013

FAMILY) I2H PLEASE

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CONTENTS

PAGE

1.0 INTRODUCTION ................................................................................................................................ 1

2.0 SUPPLY AND DELIVERY ................................................................................................................. 2

3.0 SIZE AND SPACE REQUIREMENTS ............................................................................................... 4

4.0 SITE LOCATION AND PREPARATION ............................................................................................ 9

4.1 Site Location

4.2 Gas Supply

4.3 Flue System

4.4 Water Supply - Including heat exchanger warranty conditions

4.5 Condensate Connections

4.6 Electrical Supply

5.0 BOILER ASSEMBLY ....................................................................................................................... 18

5.1 General

5.2 Water Connections

5.3 Flue Connections

5.4 Electrical Connections

6.0 PRE-COMMISSIONING ................................................................................................................... 19

6.1 Gas Supply

6.2 Ventilation

6.3 Pipework, Valves and Pump

6.4 Flue

6.5 Electrical

7.0 CHECKS PRIOR TO LIGHTING ...................................................................................................... 20

7.1 Boiler Gas System Leak Check

7.2 Checks Prior to Lighting the Boiler

7.3 Initial Lighting

7.4 Combustion Checks

7.5 User Instructions

8.0 BOILER CONTROLS ....................................................................................................................... 24

8.2 Controls Operation

8.3 Functions

9.0 FAULT FINDING .............................................................................................................................. 40

10.0 SERVICING ...................................................................................................................................... 42

11.0 REPLACEMENT OF FAILED COMPONENTS ............................................................................... 44

12.0 RECOMMENDED SPARES ............................................................................................................. 45

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PAGE

APPENDICES

APPENDIX A GAS DATA ............................................................................................................................. 47

APPENDIX B ELECTRICAL CONNECTIONS AND CONTROLS ............................................................... 48

APPENDIX C FLUE DATA ........................................................................................................................... 51

APPENDIX D VENTILATION........................................................................................................................ 60

APPENDIX E WATER DATA ....................................................................................................................... 62

APPENDIX F HYDRAULIC DIAGRAMS - CASCADE CONTROL & ADDITIONAL CIRCUIT ................... 67

PICTORIAL AND DIAGRAMATICAL DATA

Figure 2.1 Boiler Packaging ...................................................................................................................... 2

Figure 2.2 Boiler Package Dimensions ..................................................................................................... 3

Figure 3.1.1 Dimensions and clearances ..................................................................................................... 4

Figure 3.1.2 Clearances for boilers with horizontal flues .............................................................................. 5

Table 3.1.3 Dimension for boilers with vertical flues ................................................................................... 5

Figure 3.2.1 Single boiler with pipe kit installation ....................................................................................... 6

Figure 3.2.2 Two boiler with pipe kit installation .......................................................................................... 6

Figure 3.2.3 Optional low loss headers ........................................................................................................ 7

Figure 3.2.4 Three boiler with pipe kit installation ....................................................................................... 8

Figure 3.2.5 Four boiler with pipe kit installation ......................................................................................... 8

Figure 4.2 Gas connection ........................................................................................................................ 9

Figure 4.3.2 Flue terminal locations ........................................................................................................... 11

Figure 4.4 Water connections .................................................................................................................. 12

Figure 4.5.1 Boiler condensate connection ................................................................................................ 15

Figure 4.5.2 Boiler condensate discharge .................................................................................................. 16

Figure 4.6 Wiring schematic .................................................................................................................... 17

Figure 7.1 Gas system leak check .......................................................................................................... 20

Figure 7.2.2 Gas inlet pressure test point ................................................................................................... 21

Figure 7.2.1 On / OFF Switch ..................................................................................................................... 22

Figure 7.6 Combustion analyser probe position ...................................................................................... 22

Figure 7.6.1 Adjusting gas valve throttle .................................................................................................... 23

Figure 7.6.2 Adjusting gas valve throttle .................................................................................................... 23

Figure 7.6.3 Adjusting gas valve offset

....................................................................................................... 23

Figure 7.6.4 Adjusting gas valve offset ....................................................................................................... 23

Figure 8.2 System configuration with LMU .............................................................................................. 24

Figure 8.2.1.1 Fascia Legend ........................................................................................................................ 25

Figure 8.2.1.2 Overview of fascia panel ........................................................................................................ 25

Figure 8.1.6 General overview of boiler controls ........................................................................................ 26

Figure 8.2.1.2 Info display parameters .......................................................................................................... 28

Figure 8.2.1.3 Operation and display philosophy .......................................................................................... 29

Figure 8.2.2 Screen legend ........................................................................................................................ 30

Figure 8.2.3.1 Default display ........................................................................................................................ 31

Figure 8.2.3.2 Display of status codes ........................................................................................................... 31

Figure 8.2.4 Lockout display ....................................................................................................................... 32

Figure 8.2.5 Heating circuit setpoint ........................................................................................................... 32

Figure 8.2.6 Overview of end user parameters .......................................................................................... 33

Figure 8.2.9 Operating mode ...................................................................................................................... 34

Figure 8.2.10 LMU Error codes .................................................................................................................... 36

Figure 8.3.10 LMU Error log ......................................................................................................................... 37

Figure 8.3.11 Operating phases ................................................................................................................... 38

Figure 8.3.12 Operating phases ................................................................................................................... 39

Figure 9.2 Water flow switch ................................................................................................................... 40

Figure 9.3.1 Wiring Schematic ................................................................................................................... 41

Figure 10.2 Combustion chamber ............................................................................................................. 43

Figure 10.2.1 Spark electrode position ......................................................................................................... 43

Figure 10.2.2 Flame sensing probe position ................................................................................................ 43

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APPENDIX PAGE

Figure A1 Gas Data ................................................................................................................................ 47

Figure B1.1 Electrical Supply ..................................................................................................................... 48

Figure B1.2 External Control Wiring for Multiple Boiler Installation ........................................................... 49

Figure B1.3 Sensor resistance values ....................................................................................................... 50

Figure C1 Flue Data ................................................................................................................................ 51

Figure C1.1 Room sealed C13 horizontal con ce ntric flue .......................................................................... 53

Figure C1.1.1 Room sealed C13 concentric flue equivalent lengths ............................................................ 53

Figure C1.2 Room sealed C13 horizontal con ce ntric flue .......................................................................... 54

Figure C2.1 Room sealed C33 vertical concentric flue .............................................................................. 54

Figure C3.1 Room sealed twin duct horizontal flue .................................................................................. 55

Figure C2.1 .1 Room sealed C33 concentric flue equivalent lengths ........................................................... 55

Figure C3.1 .1 Room sealed C33 concentric flue equivalent lengths ........................................................... 56

Figure C3.2 Room sealed twin duct vertical flue ....................................................................................... 56

Figure C3.2.1 Room sealed C33 twin duct equivalent lengths ..................................................................... 56

Figure C4.1 Open flue B23 horizontal ........................................................................................................ 57

Figure C4.1 .1 Open flue B23 flue equivalent lengths ................................................................................... 57

Figure C4.2 Open flue B23 vertical ............................................................................................................ 57

Figure C4.2 .1 Open flue B23 flue equivalent lengths .................................................................................. 58

Figure C5.1 Cascade flue <150kW ............................................................................................................ 58

Figure C5.1.1 Cascade flue equivalent lengths<150kW ............................................................................... 58

Figure C5.2 Cascade flue >150kW ............................................................................................................ 59

Figure C6. Flue Accessories .................................................................................................................... 59

Figure D1 Mechanical Ventilation Flow Rates ........................................................................................ 61

Figure E1 Water Data ............................................................................................................................. 62

Figure E1.1 Typical Piping Layouts ........................................................................................................... 64

Figure E1.4 Cold Feed & Vent Sizes ..................................................................................... ....................64

Figure E1.7 Pump performance curves ..................................................................................................... 65

Figure E2 Typical pipe kit system connections ....................................................................................... 66

Figure F1 Hydraulic diagram 02 ............................................................................................................. 67

Figure F2 Hydraulic diagram 80 ............................................................................................................. 67

Figure F3 Hydraulic diagram 50 ............................................................................................................. 68

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1.0 INTRODUCTION

1.1 This boiler must be installed by a competent

person . All installations MUST conform to the relevant Gas Safety and Building Regulations. Health & Safety requirements must also be taken into account when installing any equipment. Failure to comply with the above may lead to prosecution.

1.2 This boiler is intended for use on Group H Natural Gas (2nd Family) .The firing information is to be found in Appendix ‘A’. Boilers MUST NOT use gas other than that for which they are designed and adjusted.

1.3 The ‘Fleet’ H series boiler is a floor standing, gas fired, fully modulating, pre-mix, condensing, room sealed central heating / hot water boiler, comprising of 8 models covering the range of 40 - 150kW output Where the application requires more than a single boiler output, cascade systems can be supplied in a modular format, configured horizontally up to 4 boilers wide sharing common water pipe work - optional HHL supply. See figures 3.2.1 - - 3.2.5 , for typical schematic layout.

1.3.1 Using the latest gas / air ratio control technology it is able to provide clean efficient operation across a large output range via the Merley Boiler Sequence Controller, ideally suited to installations that do not have a dedicated controls installation. The Merley control provides cascade management for multiple boilers and simultaneous management of three different circuits operating at different temperatures. (radiators, dhw & under-floor heating) . Operation is initiated and controlled by a LMU boiler management system with a user interface LCD display for accessing and changing boiler parameters.

1.3.2 Each of the boiler models is designed for direct connection to a plastic flue system - HHL supply. The Technical Data for the various arrangements is given in Appendix C. The flue outlets from more than one unit may be connected to a single chimney, or individual modules can be room sealed using appropriate concentric or twin duct systems (HHL supply) up to a maximum length refer to Appendix C No draught diverter is fitted to the boiler nor is a fixed diverter required in the flue system. However, for B23 applications, the Hamworthy air inlet filter MUST be used to provide the correct clean air supply to the boiler. Refer to Appendix C.

1.3.3 The Fleet is intended for the heating of Commercial and Industrial premises, or large residential properties. It may also be used to supply hot water for these premises via an indirect cylinder.

1.4 The boiler is suitable for connection to an open vented and un-vented (pressurised) heating system, care must be taken to ensure all extra safety requirements are satisfied and that the relevant interlocks will shut the boiler (s) off should a high or low pressure fault occur. The pressurisation unit must also incorporate a low level water switch which protects the water pumps and will directly or indirectly shut down the boiler plant should a low water condition occur. Consideration should also be given to the maximum working pressure of the boiler as given in Appendix ’E’. Consult Hamworthy Heating Technical Department for help or assistance if in doubt.

1.5 The Fleet boiler is not suitable for direct connection to domestic hot water supplies.

1.6 BOILER MODELS

Single models Fleet F40H - output 40kW Fleet F50H - output 50kW Fleet F60H - output 60kW Fleet F70H - output 70kW Fleet F85H - output 85kW Fleet F100H - output 100kW Fleet F125H - output 125kW Fleet F150H - output 150kW

1.7 Each Fleet boiler is supplied with a vfc contact output

for Normal Run and General Fault outputs, and 0~10v analogue control input compatibility.

1.8 Options - refer to individual kit instructions for details

1.8.1 Optional water pipe work kits are available for

horizontal single boilers up to 4 boilers wide,.These kits are free-standing allowing installation to the system prior to installing the boiler and incorporate all necessary valves, inter connecting pipework, and flow and return headers. Refer to individual kit instructions 500005133 for details.

1.8.2 Controls peripherals The LMU boiler management system has the potential to accept the following control options:

1.8.2.1 External sensor Allows direct weather compensation on an individual boiler. Not to be used for multiple boiler systems.

1.8.2.2 Clip in module (LPB Bus) Allows communication with multiple boilers under the control of a Merley Boiler Sequence Controller.

1.8.2.3 Merley Boiler Sequencer Controller Allows cascade management of up to 16 boilers, and interface with a BMS system.

1.3.4 The Fleet has a low water content and is fitted with an integral circulating pump to ensure that water flow rates are achieved - refer to Appendix E for available pump head to the system. Accordingly in a primary circuit - refer Appendix E there is no need for a primary circulating pump.

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2.0 SUPPLY AND DELIVERY

The boiler is despatched to site as a pre-assembled and tested unit. Each boiler is delivered by a tail lift vehicle and lowered to ground level. It is the installers responsibility to convey the boiler to the plantroom.

Figure 2.1 - Boiler Packaging

NOTE: The Fleet H series boilers are packaged in a wooden crate to allow stacking. Once removed from the

packaging, all boilers can be manoeuvred on a standard pallet truck. However, when handling and manoeuvring the boiler care must be taken to avoid damage to the casing. The flue system is packaged separately.

The boiler must be kept upright during handling.

The flue system is supplied separately to the boiler and must be specified at the point of order - refer to Appendix C.

Warranty

Full warranty assistance will be covered when the appliance is commissioned by Hamworthy Heating Ltd, see Terms & Conditions for full details.

Hamworthy Heating Ltd will not accept any liability resulting from damage due to tampering, improper use, handling, installation errors, operation and maintenance. It is important to check for damage upon receipt of product, which if found must be notified to Hamworthy Heating Ltd immediately.

In the event of failure or breakdown, isolate the equipment and contact Hamworthy Technical Support Tel - 0845 450 2866

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Figure 2.2 - Boiler Packaged Dimensions

Model H mm W mm D mm Weight (kg)

F40H 1100 800 800 112

F50H 1100 800 800 112

F60H 1100 800 800 130

F70H 1100 800 800 130

F85H 1100 800 800 148

F100H 1100 800 800 148

F125H 1100 800 900 165

F150H 1100 800 900 180

Delivery Verification

When taking delivery please ensure that you have received the correct number of boilers and individual flue kits to fulfil your order. If any item is missing please contact our after sales service team. Please provide details of your order such as order number and contract number as well as a detailed description of the missing item.

Frame Set and Pipe work Header Kits

Where pipe work kits are supplied, these are packaged separately from the boilers. All ancillary items such as isolation valves and boiler make-up connectors are factory fitted and tested The whole is shrink wrapped for security and basic protection. Refer to Kit instructions 500005133 for specific information.

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3.0 SIZE AND SPACE REQUIREMENTS

3.1 The Fleet boiler range has been designed to utilise minimum floor space, therefore it is important that the plant room has sufficient ceiling height to allow for installation and connection to the flue system allowing for sufficient access at sides and behind boiler for pipe work connections. See Figure 3.1

750 crs

Flow

Air inlet

Gas Return

Safety Valve

Flue removed for clarity

Electric

15 0

Condense

140

Rear view Side view

Room sealed flue connection shown

713

51 4

36 3

274

570

638

650

1570

Flue Connection C

74 crs

A50

Front view

650

700

830

Fl eet H Ser i es Boiler M odel

F40/50H

Dim.

A 58080580

B700

80/125 80/125

C *

C **

C * - for l onger fl ues, the 80/125 connection can be adapted to 100/150Ø or a tw i n duct system.

C ** - kits are avai lable to adapt the flue ducts to 100, 130 or 150m m Ø .

F60/70HF85/100H F125H F150H

580

700 700

80/125

680

800

100/150

100

680

800

100/150

100

400400

950 min

clearance

450

Plan vie

Figure 3.1.1 - Dimensions - refer to table Figure 3.1.3

Note: - the location of the room sealed flue connection is to accommodate the H series pipe work kit, which is

located above the boiler casing. If this kit is not being utilised, the height of the connection can be reduced.

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1085 max

1040 min*

Figure 3.1.2 - Clearances for horizontal flues Note * relates to the use of the Hamworthy H series pipe work kit. This can be reduced if the pipe work is behind the boiler.

580 min (80/125 )

1350 (80/1 25)

930 min (10 0/15 0)

Figure 3.1.3 - Clearances for vertical flues Note * relates to the use of the Hamworthy H series pipe work kit. This can be reduced if the pipe work is behind the boiler.

1730 (100/ 150)

1200 min*

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3.2 The Hamworthy Heating Ltd frame set and pipe work kit is designed to provide a compact solution for connecting the boilers to the gas supply and flow and return water connections. The kit locates the pipe work above the boiler casing. Refer to kit instructions 500005133 for specific information

375

125

1/2” BSP Socket F+F for pressure gauge

Flow Models F40-100H ~ Dn50 Models F125-150H ~ Dn65

Return Models F40-100H ~ Dn50 Models F125-150H ~ Dn65

Gas 2”

750

800

Side view Rear view

Figure 3.2.1 – Single boiler installation

1280

1500

120

Flow Models F40-100H ~ Dn50

Models F125-150H ~ Dn65

Return Models F40-100H ~ Dn50

Models F125-150H ~ Dn65

Gas 2”

930 Nom.

1050 Nom.

1240 Nom.

Figure 3.2.2 – Two boiler installation

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Figure 3.2.3 – Optional Low Loss Headers - Refer to table 3.2.5

Pockets for temperature sensors * 2

Primary Flow

380

Primary Return

190

Nom.

AAV

507

Secondary Flow

Secondary Return

380

180

Nom.

Single secondary circuit

AAV

Secondary Flows

Pockets for temperature sens ors * 2

1430 Nom.

Primary Flow

380

Primary Return

190

Nom.

507

Sec ondary Returns

370 Nom.

180

Nom.

1240 Nom.

1050 Nom.

560 Nom .

Three secondary circuits

Sensor Pocket ½” BSP

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Instrument Spool

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2250

2300

120

Figure 3.2.4 – Three boilers

3000

120

Figure 3.2.5 – Four boilers

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4.0 SITE LOCATION AND PREPARATION

4.1 Site Location.

 The boiler is heavy. Care must be taken when lifting the boiler

 The floor or plinth for the boilers and pipe work kit must be both flat and level to ensure

correct alignment of fittings and connections.

 The floor or plinth must be sufficiently strong to support the weight of both the boilers

and pipe work kit where used.

 The floor or plinth must be fireproof in accordance with BS 6644.

 The plant room must have sufficient space for installation of boilers, pipe work, pumps

controls, flues ventilation, access and servicing and other items of plant.

4.2 Gas Supply.

 Gas supply pipes must be in accordance with BS 6891 or IGE/UP/2

 Gas supply connections to the boiler must not be smaller than the connection on the

boiler - refer to Figure 4.2 & Appendix 2 for the connection size.

 Gas installation must be soundness tested to BS 6891 or IGE/UP/1 & IGE/UP/1A.

 Gas installation must be purged to BS 6891 or IGE/UP/1 & IGE/UP/1A.

 Inlet gas pressure to boiler measured at the gas valve, nominal 20mbar (minimum

17.5mbar) dynamic - refer to Appendix A

 Boiler house gas isolation valve must be clearly identified and installed close to the

entrance / exit.

Gas connection

Figure 4.2 - Gas Connection Point

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4.3 Flue System



The Fleet flue systems supplied by Hamworthy are non UV stabilised polypropylene and are therefore suitable for internal use only. For external flue runs and termination, either use the dedicated kits supplied by Hamworthy or refer to a chimney specialist .

 Flue termination, routing and construction must comply with the requirements of the

Clean Air Act 1956, BS 6644, BS 5440 and IGE/UP/10 where applicable.

 Individual modules must be flued using the concentric or twin duct systems provided or

connected into conventional chimney system suitable for condensing application.

 Fleet boilers are suitable for open flue (type B

) installation, drawing combustion air

from the plant room, or room sealed, twin duct (type C53) installation - see section 5.2. For type B23 installations, the maximum number of modules firing into a common chimney is 9. For larger installations refer to HHL Technical. The flue system must be designed to limit the max. suction (cold) to 30Pa negative, measured at the connection to

the boiler. If the suction is greater than 30Pa, refer to HHL technical. This condition must then be checked hot and with all boilers firing, the max. pressure at the connection to the boiler should be 150Pa positive. In the event that the flue system when hot does generate a suction, the max. suction is 100Pa.

 For type B23 installations the Hamworthy air inlet filter MUST always be fitted .

Refer to Appendix C.

 Any stabiliser fitted must be in or close to the vertical chimney.

 Due to the low flue gas temperature, (~50°C) condensation will occur in the flue, flue

materials must be non-corrosive and utilise fully sealing joints.

 Adequate facilities must be provided for draining the flue condensation from the flue

system using the components available from HHL - refer to Appendix C. For short flue

runs (<1m) it is not practical to provide drainage from the flue system. Horizontal runs of flue must provide condense drainage from the flue /chimney and must

slope at 3° (50mm/m) along the horizontal length, towards the boiler. For longer flue

systems (>1m), the flue system MUST NOT drain through the boiler - see section 5.2 . For multiple boilers into a common flue header, the common header must slope at 3°

back to the boilers and provision made to remove condensate from the header - see

section 5.2 .

 Horizontal flue runs must be kept as short as possible and be inclined at minimum 3°

(50mm/m) towards the boiler. For maximum equivalent flue lengths, refer to Appendix C.

 Any flue must be self-supporting and separable from the boiler for servicing

requirements.

 Note: Due to high thermal efficiency of the Fleet boiler and the resultant low flue gas

temperatures there will be visible pluming of the flue gases at the flue termination. This

is likely even when the boiler is not operating at condensing temperatures.

 Fan dilution - the design must provide for the use of balancing and trim dampers,

and their location and operation must be such that the constraints detailed above

can be met. Care must be taken to ensure that the fan performance is matched to

deliver the appropriate dilution, whilst ensuring that excessive suction is not

applied to the boilers. If in doubt, refer to HHL Technical.

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4.3 Flue Terminal Locations

The diagram below details the minimum spacing requirements for flue terminals from other building features when using the concentric and twin duct flue systems (C13, C33, C53 & B23)

It is recommended that air supply inlet terminals are positioned no closer than 300mm to any flue terminal when using C53 twin pipe flue systems. Air supply inlets should preferably be positioned lower than flue terminals.

Figure 4.3.2

Dim Terminal Position

Note: Flue Installation should comply with BS5440 Part 1

Min Distance

(mm)

A Directly below an opening, air brick, opening window etc 300

B Above an opening, air brick, opening window etc 300

C Horizontally to an opening, air brick, opening window etc 300

D Below gutters, soil pipes or drain pipes 75

E Below eaves 200

F Below balconies or car port roof 200

G From a vertical drain pipe or soil pipe 150

H From an internal or external corner 300

I Above ground roof or balcony level 300

J From a surface facing the terminal 600

K From a terminal facing the terminal 1200

L From an opening in the car port (e.g. door, window) into the dwelling 1200

M Vertically from a terminal on the same wall 1500

N Horizontally from a terminal on the same wall 300

O From the wall on which the terminal is mounted N/A

P From a vertical structure on the roof N/A

Q Above intersection with roof N/A

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4.4 Water Supply

 Feed and Expansion tanks to comply with static height requirements of HSE

document PM5.

 Cold feed and open vent pipes to comply with requirements of BS 6644.

 The Fleet boiler is fitted with an integral circulating pump, which will shut off

circulation through the heat exchanger 5 minutes after the boiler has ceased firing. The pump head available from the boiler, is only suitable for circulation in the primary circuit. This must be acknowledged in the system design.

 Pressurised system to comply with BS 7074.

 Each module is supplied with a safety valve set at 6barg to protect the boiler.

It is imperative that a suitable safety valve is fitted to the installation in the event that the system design pressure is lower than the boiler maximum operating pressure, according to the requirements of BS6644 -2011

 The Fleet boiler has an aluminium heat exchanger. It is a requirement that the

system & pipe work are flushed at least twice before adding water treatment and

before installing the boiler. The system water MUST be treated and maintained with an appropriate inhibitor (eg. Sentinel X100) and the PH MUST be managed between 7 & 8.5. Failure to observe this requirement will invalidate the warranty.

 In hard water areas (>180mg CaCO3/litre) precautions such as water treatment are

strongly recommended to prevent the build up of sludge and scale.

 Leaks in the system pipe work MUST be fixed to prevent dilution of water

treatment.

 Maximum working water pressure is 5.3bar.

 For minimum water pressure 0.5 bar - refer to Appendix E

Flow water connection

Return water connection

Safety Valve

Figure 4.4 - Water Connection Points

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Heat exchanger warranty conditions, to be read in conjunction with

Hamworthy Heating Limited’s terms and conditions of sale and service.

Heat exchanger warranties are conditional upon correct system design, installation, operation and maintenance in accordance with the manufacturer’s instructions, relevant legislation and best practice.

In the event of defect or manufacturing fault it is the buyer's responsibility to prove so, clearly established and recognised by Hamworthy Heating Limited, the manufacturer's responsibility is as follows:

The warranty is limited to the supply of the part recognised to be faulty for a period of 5 years from date of delivery and all transport expenses but excludes labour costs inherent to disassembly and reassembly, unless commissioned by Hamworthy Heating Limited or an approved Sub Contractor.

THE APPLICATION OF THE WARRANTY IS SUBJECT TO:

Compliance with the manufacturer’s recommendations as detailed in the operating and maintenance manual,

ensuring that the commissioning is carried out by either Hamworthy Heating Limited or a competent engineer. To ensure that the settings and checks noted on the commissioning sheet (included in the maintenance manual) are recorded and detailed within the boiler log book.

That the boiler maintenance is carried out by Hamworthy Heating Limited or a competent maintenance company, the maintenance regime detail shall be provided in writing, when required, to prove compliance with the operating and maintenance literature.

Installation requirements shall be as defined and required by UK legislation, best practice and applicable European standards:

Water Supply

 Feed and Expansion tanks to comply with static height requirements of BS6880 & BS6644.  Cold feed and open vent pipes to comply with requirements of BS 6644.  Pressurised system to comply with BS 7074.  It is required that the system pipe work is flushed twice with a suitable flushing and cleaning agent and

before the new boiler(s) are installed (for example: Sentinel X300 for new systems, or Sentinel X400 for

older systems) prior to the inclusion of water treatment

System water quality can be the cause of corrosion due to inappropriate Ph levels, oxygen presence and heterogeneity of different metal types within the system. To avoid this, the system water may have to be treated; the following limiting values must therefore be used for the composition of the heating water. (Please note: the guarantee may become null and void if the installation is not flushed and/or the water quality is inadequate).

Element Composition

Acidity Level (untreated water) 7.0 - 8.0 pH

Acidity Level (treated water) 7.0 - 8.5 pH

Conductivity (untreated water) 800 µS/cm (at 25°C)

Chlorides  150 mg/l

Iron  125 ppm (treated)

Copper  1 ppm (treated)

Aluminium  1 ppm (treated)

Water Hardness (CaCo3),  300 mg/l

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In line with the values above the following must also be taken into account:

 To ensure that the system is adequately protected against any possible corrosion of copper or copper-

bearing alloys that may be present within the system. (Note: Azole should be present in treatment

chemicals to sequester the copper in solution and protect any yellow metal (i.e. copper and brass etc)

components within the system.

 The use of artificially softened water MUST be avoided due to its corrosive characteristics  To ensure that any electrolytic action and subsequent corrosion is prevented. Electrolytic corrosion can

occur between dissimilar metals in the heating system, such as copper, brass, aluminium alloy and steel.

 To ensure that the use of a chemical corrosion inhibitor is used to protect the entire system.  Leaks in the system pipe work MUST be fixed to prevent dilution of water treatment.

It is a condition of this warranty that the appropriate water treatment is applied and that the products used have been found suitable for all materials used in the central heating system. Periodic inspections should be built into the service regime and where required replacement of inhibitors is undertaken. Although there are a wide range of water treatment products available, the following are compatible and should be considered:

Sentinel Performance Solutions Ltd:

 Sentinel X100 (protection agent)  Sentinel X200 (lime scale remover)  Sentinel X300 (cleaning agent for new installations)  Sentinel X400 (cleaning agent for existing installations)  Sentinel X500 (antifreeze plus protection agent)

Fernox:

 Restorer (cleaning agent, for removing rust, lime and sludge)  Protector (protection agent)  F1 (protection agent)

The following applies to system design:

 In order to avoid thermal shock, water flow must not be able to be interrupted before the boiler stops firing.  There must be provision to ensure that the heat exchanger is not susceptible to air locks.  The air separator must be correctly sized and be equipped with an appropriate vent.  A dirt separator must be correctly sized and fitted in the return close to the boiler(s)  The system pressure must be in accordance with the information detailed within the operating and

maintenance manual (minimum 0.5 bar cold fill and 5.3 bar maximum working pressure).

 A filter must be mounted on the return pipe to the boiler(s).  Minimum flow rates must be adhered to (as detailed within the operating and maintenance manual)

In particular, but not limited to, the following conditions are not covered by the 5 year heat exchanger warranty:

 Defects resulting from incorrect installation, application, use, lack of the appropriate maintenance regime (in

accordance to the operating and maintenance manuals), deterioration or accident due to negligence or

involvement by an unauthorised third party.  Damage due to acts of God, freezing, electrical storms, water damage, faulty flues, incorrect ventilation of

the boiler room, and, in general, any action, negligence or clause recognised to be of an exceptional nature.

 Presence of aggressive vapours (chlorine, solvents, etc...).  Boiler gas configuration or type which is not appropriate to the type of gas approved for the appliance.  Damage caused by use of spare parts not compatible with the product.

Operation of the product at system pressures above that for which it was designed and manufactured.



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4.5 Condensate Connections



Provision must be made for removal of condensate from the boiler and flue system.

 If the flue system is longer than the standard length of 0.9m, an inline condense

drain must be fitted immediately before the connection of the flue system to the boiler and taken to drain.

 Condense is mildly acidic, typically pH3 - pH5.

 Condense pipe work must be non-corrosive and not copper. Hamworthy

recommend plastic waste pipe.

 Condense may be discharged to a standard drain subject to National or Local

regulations.

 Location of condense pipe work should prevent freezing within tundishes, traps and

pipe work.

 The connection to the boiler condense drain accepts a straight push-fit coupling for

32mm i.d. (40mm o.d) plastic waste pipe.

 Maximum condensate production - 7.5 l/h per 50kW firing capacity

Boiler Condensate connection 40mm

Figure 4.5.1 - Boiler Condensate Connection

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Concentric inline drain & trap

Tundish to drain

Horizontal Concentric Flue System

Vertical Concentric Flue System

Single pipe inline drain & trap

Tundish to drain

Conventional Chimney Flue System

Figure 4.5.2 - Flue Condensate Connection and discharge

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4.6 Electrical Supply

WARNING! THIS APPLIANCE MUST BE EARTHED IN ACCORDANCE WITH IEE REGULATIONS

 Boiler electrical supplies must not be switched by a time clock.

 Boilers are suitable for 230Volt, 50Hz supply.

 External fuses should be rated for 6 amps



 Wiring must be completed in heat resistant cable size 1.0mm² csa.



 Each boiler MUST have individual means of isolation. 



 Electrical isolators must facilitate complete electrical isolation.



 Electrical isolators must have contact separation of minimum 3mm in all poles.



 Electrical isolators must be installed in readily accessible locations.



 Electrical supplies to boiler modules should only serve the boiler.



 Where an external alarm is required, terminals are provided which are volt free and

rated at 230v.



 Time clock control should be via the boiler modules stop/start circuit (24V DC).

 Any interlock circuit must be in series with the time control for each circuit. The

interlock circuit must never be used to isolate the boiler electrical supply.

ADDITIONAL INFORMATION REGARDING ELECTRICAL SUPPLIES IS GIVEN IN BS EN60335, Part 1.

NOTE: The appliance must be isolated from the electrical supply if electric arc welding is carried out on connecting pipe work.

FOR TYPICAL SCHEMATIC DETAILS SEE FIGURE 4.6

FOR DETAILED WIRING INSTRUCTIONS SEE FIGURES 9.3.1

AND APPENDIX B

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HAMWORTHY HEATING LTD

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5.0 BOILER ASSEMBLY

5.1 General

Boilers are despatched to site as fully assembled units. The flue components (where applicable) and pipe work kit (where applicable) are the only items that will need assembling on site.

During assembly it is important to take care to prevent damage to the boiler casing.

Boiler positioning must allow the minimum clearances detailed in Section 3.0 to facilitate access for flue and pipe work connections as well as maintenance. The boiler must be installed on a solid floor. In locating the boiler a pallet truck is recommended so as to avoid damage to the casing parts

Health and safety. Due to the weight of the boiler, care must be taken when manoeuvring the boiler. HHL suggest the use of a pallet truck

5.2 Water Connections

The connections provided on the boiler (refer to Appendix E and figure 4.4) are suitable for direct connection to the system pipe work. However HHL recommend the use of individual isolating valves, which should be fitted to each module to enable isolation from the system. However, the arrangement must comply with the requirements of BS 6644.

When installing water system pipe work, it must be self supporting and care must be taken to ensure that undue stress is avoided on the boiler flow and return connections. It is recommended that unions are fitted local to the boiler and outside of the casing, to permit future servicing requirements.

Each module is fitted with safety valve rated at 6bar. The valve discharge pipe is routed to the rear of the boiler, where it must be piped to discharge via a tundish (not HHL supply) suitably located for ease of visibility.

The Fleet is designed to operate at 20°C T across the flow and return. Should the flow rate drop, the boiler controls will modulate the burner to maintain 20°C T. The boiler module is fitted with a single speed circulating pump and flow is controlled through a balancing valve, which must be checked and set during commissioning. As a safety precaution, a flow switch is fitted to the boiler heat exchanger to shut the system down in the event of sudden adverse flow conditions.

Where using Hamworthy Heating Ltd pipe work kits, assembly of these is detailed in Instruction Manual 500005132 supplied with kit.

5.3 Flue Connection

5.3.1

The Hamworthy Fleet boiler is designed for use with the following flue systems supplied by Hamworthy - see Appendix C

80/125mm concentric room sealed, balanced flue system for rear/side through the wall discharge. 100/150mm concentric, room sealed, balanced flue system for remote discharge, horizontal or vertical. 100/130 & 150mm separate air and flue ducts, room sealed, balanced flue system for remote discharge. 100/130 & 150mm flue duct, for connection to an open flue (chimney) system.

Flue systems should be designed with reference to BS 5440 part 1, IGE/UP/10 and Third Edition of the 1956 Clean Air

Act Memorandum.

5.3.2

Flue installations can be configured to suit a number of applications, see Appendix C, but must comply with one of the following options:

Room Sealed.

Type C13: Horizontal balanced flue. Type C33: Vertical balanced flue. Type C53: Separate intake and discharge ducts terminating in different pressure zones.

Open Flue. Type B23: Intake from ventilated plant room and discharge via horizontal/vertical flue.

For room sealed applications, the flue ducts must be supplied by HHL. For open flued applications, it is advisable to use the HHL supplied ducts to the point of conenction to a chimney.

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It is important that horizontal flue terminal discharges are positioned in accordance with the requirements detailed in Figure 4.3.2. In the case of twin duct applications (C53), air supply inlets must be positioned at least 300 mm from flue terminals to prevent flue gas re-circulation. Hamworthy Heating recommend that flue terminals discharges are positioned higher than air inlets. To comply with the requirements of the Clean Air Act 1956 a maximum of 150 kW may be terminated with horizontal flue discharges.

Equivalent lengths for 90° bends and 45° bends are given in Appendix C.

5.4 Electrical Connections:

The following electrical connections are provided on each module.

 Supply: Live, Neutral and Earth. See Section 4.5 for details.  Supply Input for Boiler Fault and Normal Run Signals  Boiler General Fault Alarm Signal Output  Boiler Normal Run Signal Output  0-10v Analogue Control Signal Input  Remote on/off Control Input  Boiler Shunt Pump Output  Safety Interlock Circuit Input  Optional LPB Bus for use with Merley boiler sequencer control

6.0 PRE-COMMISSIONING

The following pre-commissioning check must be carried out before the boiler is commissioned.

6.1 Gas Supply.

Ensure that gas installation pipe work and meter has been soundness tested and purged to IGE/UP/1 or IGE/ UP/1A as appropriate. Test and purge certificates should be available for viewing.

6.2 Ventilation

Ensure that ventilation and air supply to plant room is correct.

6.3 Pipe work, Valves and Pump

Ensure that;

 System flushing and suitable water treatment has been implemented  Pipe work and valve arrangement is installed to Hamworthy Heating recommendations.  Circulating system is full of water, vented and pressurised appropriately.  Circulation pump is operational.  Pipe work connections to boiler are fitted correctly.  All necessary isolation valves are open.  Condense connections on boiler and flue are connected and piped to drain.  Heat load is available.

6.4 Flue

Ensure that;

 Flue system is correctly designed and installed to suit boilers.  Flue passages to chimney are clear.

6.5 Electrical

Ensure that;

 Electrical connections are correct and isolatable.  External controls are operational.

WARNING: WHEN THE FRONT COVER IS REMOVED AND THE BOILER IS

OPERATIONAL, CARE MUST BE TAKEN WITH ELECTRICAL COMPONENTS AND

ACCESS TO PRIMARY INSULATION.

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7.0 CHECKS PRIOR TO LIGHTING

IMPORTANT: BEFORE PROCEEDING ENSURE THAT THE PRE-COMMISSIONING CHECKS ON PAGE 19

HAVE BEEN CARRIED OUT AND THE RESULTS SATISFACTORY.

7.1 Boiler Gas System Leak Check

Ensure that the appliance manual gas service valve is in the OFF position. Although the boiler receives a gas leak check and gas train component integrity check prior to leaving the factory, transport and installation may have caused disturbance to unions, fittings and gas valve assemblies etc.

A procedure guide is given below. Care must be taken not to allow leak detection fluid (if used) on or near any electrical parts or connections.

NOTE: the test detailed below must be carried out on each module.

Note:-

Main Gas Supply Pressures are as follows; Natural Gas - 20mbar

TO CHECK B

1) Turn off the electrical power and gas

supply to the appliance.

2) Connect the manometer assembly to test point (Fitted on the inlet to the gas valve).

3) With A and B closed open C and monitor manometer over a 2 minute period, a rise indicates a leak on valve B.

TO CHECK A

Figure 7.1 - Gas System Leak Check Diagram

1) Open C.

2) Open B to produce the mains gas supply pressure between A and B.

3) Close B.

4) System may be considered sound if over a period of 2 minutes any drop in pressure is less than 0.5 mbar (0.2" wg.).

Note:- Allow a manometer stabilisation period of approximately 1 minute before each 2 minute check period. Following

soundness tests close valve B and remove manometer connections and tighten test points.

Water Systems

The system MUST be flushed and a suitable water treatment implemented before commissioning the boiler. When installing water system pipe work, it must be self supporting and care must be taken to ensure that undue stress is avoided on the boiler flow and return connections. It is recommended that unions are fitted local to the boiler and outside of the casing, to permit future servicing requirements.

Each module is fitted with safety valve rated at 6bar. The valve discharge pipe is routed to the base of the boiler, where it must be piped to discharge via a tundish (not HHL supply) suitably located for ease of visibility.

Where using Hamworthy Heating Ltd frame set and pipe work kits, assembly of these is detailed in Installation manual 500005133 supplied with kit.

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Fig 7.2.2 - Gas Inlet Pressure Test Point

7.2 Checks prior to lighting the boiler

Note: Refer to Appendix A, Gas Data Tables, for

maximum inlet pressure for normal operation.

7.2.1 The Following checks must be made prior to lighting the boiler;

1. Open the front cover to gain access to the boiler components. The cover is secured with a 1/4 turn latch, requiring a flat blade screw driver to operate the latch. Carefully lift off the cover to expose the boiler components and installer wiring connections. Note: Before starting the boiler commissioning procedure verify the following;

2. Ensure that all external controls are not demanding that the boiler commences operation.

3. Ensure that the gas supply is connected, but the boiler module gas service valve(s) are closed, any unions or fittings are correctly tightened and test points are closed.

4. Check that the heating system has been flushed and refilled and that air has been purged from all high points.

5. Ensure that the system isolating valves are in the open position and that the water pressure within the heating system is correct. Minimum pressure 0.5barg.

6. Ensure that the flue ducts are correctly fitted and that they are free from obstruction. Check that the inlet and outlet terminal are located correctly and in accordance with regulations.

7. Ensure that the gas supply has been properly purged and verified for gas soundness. A purge and soundness certificate should be available from the gas pipe work installation contractor.

8. Turn on the mains gas supply. Check that sufficient gas pressure is available at the boiler, 17.5mbar Natural Gas.

10.Ensure that all electrical connections made to the boiler are correctly sized and installed. Refer to wiring diagram in Figure 9.3.1 11 Check that the boiler controls wiring has not been modified. Any modification could lead to boiler failure.

7.2.2 Gas inlet pressure test

The gas pressure must be checked at the inlet to the boiler as shown in figure 7.2.2. This is to ensure that the gas pressure is both constant and sufficient to provide full burner output. To verify this the pressure has to be taken as a static and a dynamic reading. The dynamic reading cannot be taken until the boiler has been started - refer to 7.4

A maximum difference in gas pressure of 1 mbar must not be exceeded between static and dynamic conditions.

7.3 Commissioning the Boiler

Once the preliminary checks have been completed and the gas inlet pressure has been verified as correct, commissioning of the boiler modules may begin.

7.3 Initial Lighting

Only competent persons registered for working on nondomestic gas appliances should attempt the following operations. Before attempting to commission any boiler, ensure that personnel involved are aware of what action is about to be taken. Record all readings for future reference on relevant commissioning sheet. Allow system to warm up sufficiently to check operation of control thermostat. A combustion check must be taken when first commissioning the boiler. A sampling point is provided in the boiler - refer to section 8.6 - Combustion Checks

7.3.1 Operational Checks

NOTE! Care should be exercised when the boiler is firing

as the heat exchanger components can achieve temperatures, which could cause injury if touched.

1. Ensure that all external controls are in demand and that the gas supply to the module is isolated.

2. Switch the on/off switch located on the front panel of the boiler to the on position - see figure 8.1.

3. Start the individual boiler module using the mode button located on the fascia panel for the chosen module - detailed in section 8.2.5 - Controls Operation..

4. The control thermostat is set using the button (2) on the fascia as detailed in section 8.2.5 - Controls Operation.

5. As the gas valve is closed, the low gas pressure switch will prevent the boiler from firing and the error code ‘E132’ will be displayed on the screen. Refer to section 8.2.4 of Controls Operation.

6. If the above procedure occurs correctly, open the gas isolating valve and the fault indication will extinguish. The boiler will commence its ignition sequence as previously described. This time, when the gas valve is energised the burner will ignite.

7. The flame ionisation signal generated whilst the boiler is firing (should be approximately 15-20µA, but not less than 3µA, can be viewed directly from the display screen. The value is set to read dc A. Refer to

section 8.2.1.2 - Controls Operation.

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 At the end of the ignition proving period, 5

seconds, the spark ignition system will be switched off and the indicator on the control fascia extinguished.

 After a period of 15 seconds the fan will alter

speed and the burner modulation will be set according to the heat load.

 If after the 5 second flame proving period the

flame signal is below 3µA the boiler will shut down and attempt one restart.

NOTE: THE BOILER IS EQUIPPED WITH A RESTART FACILITY AND WILL ATTEMPT A SECOND IGNITION, DURING WHICH THE ABOVE PROCEDURES WILL BE REPEATED. AT THE END OF THE RESTART PROCEDURE, IF NO FLAME IS DETECTED AFTER THE FLAME PROVING PERIOD, THE BOILER WILL LOCKOUT. THE BOILER WILL NOT OPERATE UNTIL THE LOCKOUT HAS BEEN MANUALLY RESET.

7.4 Ignition Controller Check.

1. With the burner firing, the flame signal should be at least 3µA. Refer to Figure 8.2.9 - Maintenance functions. To check for correct operation of the ignition controller, close the gas valve. The boiler should shutdown after approximately one second and attempt a re-ignition. Check that the flame has been extinguished

2. Alternatively, the flame probe lead can be removed from the end of the flame probe, with the same result.



¼ turn latch

On/Off switch

Fig 7.2.1 - On/Off switch

7.5 Gas Supply Pressure Check.

1. When the boiler modules have been checked for correct operation the gas supply pressure should be checked. This should be done with all modules firing.  For Natural Gas, a nominal gas inlet pressure of 20mbar measured at the rear of the boiler is required, with

a maximum inlet pressure of 25mbar.

7.6 Combustion Checks

“The boiler modules are factory pre-set, but, site checks must be done to confirm correct performance.”

1. Remove the flue gas sampling plug from the flue collector sump, accessible from the front of the boiler and insert the combustion analyser probe in the flue at the analysis point .

2. Ensure that an insertion distance of 50mm is set on the combustion analyser probe.

NOTE: THIS DISTANCE MUST BE SET TO ENSURE ACCURATE ANALYSIS OF FLUE GASES.

3. Insert probe horizontally into the flue elbow until depth stop is met.

Figure 7.6 - Combustion Analyser Probe Setting

(Note: readings taken with front cover removed and 50mm probe insertion CO = < 80 ppm).

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4. If combustion is outside of the ranges defined below the factory sealed valves may be adjusted using the following procedure .

Models - F40W/ F50W/ F60W & F70W

High Fire Target Nat Gas - 9.0% ±0.25% CO

If combustion level is outside of this range use the Cross Head Throttle Screw to adjust the mixture.

HIS SETTING MUST BE CORRECT BEFORE CONTINUING

To increase the CO2 level, turn the adjustment anti-clockwise.

Figure 7.6.1- Adjusting gas valve throttle

Models - F85W/ F100W/ F125W & F150W

High Fire Target Nat Gas 9.0% ±0.25% CO

If combustion level is outside of this range use the Cross Head Throttle Screw to adjust the mixture.

HIS SETTING MUST BE CORRECT BEFORE CONTINUING

To increase the CO2 level, turn the adjustment anti-clockwise.

Figure 7.6.2 - Adjusting gas valve throttle

Models - F40W/ F50W/ F60W & F70W

Low Fire Target Nat Gas 9.0% ±0.25% CO

If combustion readings are outside target range use Torx Bit to make adjustments

To increase the CO

level, turn the adjustment

clockwise.

Figure 7.6.3 - Adjusting gas valve offset

Models - F85W/ F100W/ F125W & F150W

Low Fire Target Nat Gas 9.0% ±0.25% CO

If combustion readings are outside target range use Torx Bit to make adjustments

To increase the CO

level, turn the adjustment

clockwise.

Figure 7.6.4 - Adjusting gas valve offset

Fig 7.6.1 - Combustion settings

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5. Energise electrical supply and start the boiler module. The burner will ignite and run at 100% modulation.

LMU

6. Monitor the combustion readings on the combustion analyser at both Maximum and Minimum firing rates - refer to section 8.2.8.2 - Controller Stop function

*Figure must not exceed 100ppm under normal operating conditions.

If combustion readings fall within the required range the boiler module is set and operating correctly. If the combustion readings fall outside the required range the burner settings will require adjustment.

7. Shut down the boiler and isolate from the electrical supply. Remove instrumentation and replace test points and plugs.

CONTACT HAMWORTHY HEATING TECHNICAL DEPARTMENT FOR FURTHER DETAILS

8. Refer to section 8.1 - Controls Operation, to adjust the relevant boiler settings specific to the installation

7.7 Setting the flow rate to achieve 20°C ∆T

Before commissioning is complete, the flow rate must be checked and adjusted. A ball valve is located on the boiler return pipe, prior to the pump, and controls the flow through the boiler. Using the boiler flow and return temperature sensors visible on the display via the LMU programme. This MUST be carried out with the boiler running at maximum firing rate.

The 20°C T condition across the boiler must be set as follows; 1 Run boiler at maximum rate. 2 Monitor flow temperature (displayed on main screen of HMI). 3 As boiler flow temperature rises, between 60°C & 80°C , press info button (to enter information mode) then hold down up/down arrows for 3 seconds (to enter extended information mode) use + button to scroll to b1 which displays boiler return temperature. 4 Within the case, locate the ball valve on the return pipe of the boiler, and then adjust to give 20°C differential between flow and return temperature. Opening the valve will decrease the differential/closing the valve will increase the differential. Press mode button to exit back to main screen and check flow temperature. It may be necessary to repeat the sequence several times to ensure an accurate 20°C delta T is set.

8 CONTROLS OPERATION

u ilding Auto mation /

Remote M an agem e n

OCI /ACS

RVS controller

RVA4

QAC34 ..

Roo m Thermostat

/ T ime Swi tch

LPB

Auxiliary modules

Clip-in

OCI420

AGU2.50 0

AGU2.51xx

Service To ol

Figure 8.2 - System configuration of boiler control (LMU) & system peripherals

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Note. E164 error code = flow switch interrupt (too little/no flow through boiler). E154 error code = Delta T supervision active (too little flow through boiler).

7.8 User Instructions.

When the boiler is fully commissioned, the owner or their representative should be made aware of the lighting-up and operating instructions. A practical demonstration should be given describing each functional step. This Installation and Commissioning guide, the servicing instructions manual and the user’s instructions should then be handed over and be kept in a safe place for future reference.

Figure 8.2.1.1 - Fascia Label Legend

Display Screen

Figure 8.2.1.2 -Overview of Fascia Panel

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Combustion Fan

Air Pressure Switch

LMU Control

Clip in Module Vfc / 0~10v

Fuse

IEC Mains Outlet Socket

HT Spark Generator

Flow Temperature Sensor

Overheat Thermostat

Safety Relief Valve

Water Flow Switch

230v Mains Supply

Display Screen

Return Temperature

On/Off switch

Sensor

Figure 8.1.6 - General Overview of Boiler Controls

Pump

Gas Valve

Flue Gas Temperature Sensor - in flue elbow

Low Gas Pressure Switch

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8.2.1 - Info button - refer to figure 8.2.1.1

A change on the information level can be made at any time by pressing the Info button. Additional pushes of the Info button will deliver the following data sequence provided by the information level.

Extended Info mode - when on the information level, extended info mode levels b, c & d can be displayed.

Refer to Figure 8.2.2

Press both line selection buttons simultaneously for at least 3 seconds

Press one of these buttons to select the required display level

Press one of these buttons to select the required display value of the level

dhw temperature - not used



Water Pressure

  

Operating phase - refer to section 8.2.15

Outside temperature Error code - refer to section 8.2.14

Boiler temperature Press one of these buttons to return to the default display

Press the Info button to switch to the info display

Press one of these buttons to return to the default display

Button Operation Function

Lockout reset Resetting the LMU

Enable heating circuit selection of operating mode: mode Automatic operation

Continuous ‘Normal’ Operation

Continuous ‘Reduced’ Operation

Standby

Heating circuit Adjustment of boiler or room temperature setpoint temperature setpoint.

dhw temperature setpoint Adjustment of dhw temperature setpoint -

Enable dhw mode dhw on/off - not used

not used

Line selection (down / up) Selection of operating parameter

Adjustment of settings Adjustment of parameter settings

Information Select information display screens

Enable Maintenance mode Press buttons simultaneously to select

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Figure 8.2.1.2 - Info display parameters

The parameters of groups b,C and d can only be displayed

Display level Name of LMU...

General information (Enduser level)

Temperatures (Service level) ¹)

b 0 DiagnoseCode LMU...-internal software diagnostic code

b 1 TkRuec Boiler return temperature

b 2 TbwIst2 DHW temperature sensor 2 Not used

b 3 Tabgas Flue gas temperature Not used

b 4 TiAussen Outside temperature

b 5 TaGem Composite outside temperature

b 6 TaGed Attenuated outside temperature

b 7 TvIst Flow temperature AGU2.500...

b 8/ b9 Reserved

Process values (Service level) ²)

C 0 Reserved

C 1 IonStrom Ionization current

C 2 Gebl_Drehz Fan speed

C 3 Gebl_PWM_AusAkt Current fan control (PWM)

C 4 RelModLevel Relative output

C 5 Pumpe_PWM Pump setpoint (PWM) Not used

C 6 ek0 Control differential

C 7/ C8/ C9 Reserved

Setpoints (Service level) ³)

variable

Description

d 0 Reserved

d 1 Tsoll Setpoint of 2-position or modulating controller (PID)

d 2 TkSoll Current boiler temperature setpoint

d 3 TsRaum Room temperature setpoint

d 4 TbwSoll DHW temperature setpoint Not used

d 5 PhzMax Maximum degree of modulation in heating mode

d 6 NhzMax Maximum speed at maximum output in heating mode

d 7/ d8/ d9 Reserved

Note

1 Press Info button 2 Press buttons for at least 3 seconds 3 Choose the relevant parameter with buttons

Note

1 Press Info button 2 Press buttons for at least 3 seconds 3 Press button 4 Choose the relevant parameter with buttons

Note

1 Press Info button 2 Press buttons for at least 3 seconds 3 Press button twice 4 Choose the relevant parameter with buttons

Note after about 8 minutes, the display will automatically change to the default display.

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Figure 8.2.1.3 - Operation and display philosophy

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Figure 8.2.2 - Screen Legend

Character Display Function

1 Water pressure sensor signal Display of water pressure (6 pointers) in increments of 10bar

2 Display (2) 4 x 7 large segments Display of current value

3 Maintenance indicator flashing Upper arrow - Chimney Sweep active Lower arrow - Controller Stop active

4 Display symbols Meaning of symbols: Display of dhw temperature or dhw heating active – not used Display of boiler or room temp. set point, or space heating active. Display of outside temperature. Operational level ‘Normal’ Operational level ‘Reduced’ Display of flame Display of fault

5 Display (1) 4 x 7 small segments Display of time of day, parameter settings or error code.

6 Operating mode of heating circuit Operating mode is, or changes to:

Automatic Continuous ‘Normal’ operation Continuous ‘Reduced’ operation Standby

7 Operating mode of dhw. On or Off - not used

8 Time bar Display of time program of heating circuit

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8.2.3 - Default Display

2 3 4

1 Operating mode of heating circuit

2 Operation of dhw circuit -

not used

3 Operational level of heating circuit

7494 z31/02 02

4 Time of day

5 Actual value of boiler temperature

6 Water pressure

5 8

105

7 Flame status

8 Time pointer

9 Operating mode of boiler

Figure 8.2.3.1 - Default display

If no button is pressed for about 8 minutes, the screen will automatically return to the default display.

When a status code is displayed, the display (1) shows

alternatively the time of day and the error code.

(1)

(2)

Press the Info button for the display of the error code

Press simultaneously both line selection buttons

for 3 seconds. The internal error code will be displayed.

Figure 8.2.3.2 - Display of Status Code

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Example “4975”

Press the info button to return to the info display.

Press to return to the default display.

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8.2.4 - Lockout Display

In the case of a lockout code, the error code display flashes

together with an ‘Alarm symbol’;

7494z34/0902

7494z26/1 202

Figure 8.2.4 - Display of lockout code

(1)

(2)

The LMU will go to lockout

Example: “E150”

Press the Info button to switch to the error code

Press both line selection buttons simultaneously

for 3 seconds. The internal error code will be displayed

Example “238”

Press the Info button to switch to the Info display

Press to return to the default display

Note:

After rectification of the fault, press the reset

button (>0.6 seconds) to reset the LMU.

8.2.5 - Adjusting the heating circuit setpoint temperature

Press the flow temperature button to adjust the heating circuit setpoint

7494z35 /0202

(1)

Press to adjust the required setpoint

Press to return to the default value

304

Changes will be stored.

Figure 8.2.5 - Heating circuit setpoint temperature

The room temperature setpoint or boiler temperature setpoint will be changed depending on the plant’s configuration ( with or without outside sensor).

If no button is pressed for about 8 minutes, the screen will automatically return to the default display. Changes will be stored.

8.2.6 - Parameter settings for the Enduser

The boiler is supplied with default settings. These must be modified to suit individual Enduser needs.

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Press one of the line selection buttons. This will take you to programming level <<Enduser>>

Press the line selection button to choose the relevant line. The display shows <<Pxxx>>

Adjust the required value with one of these buttons. The adjustment is stored as soon as you change to some other line (to alter individual items, a change of parameter is required). The Enduser Parameter list details all possible settings.

Press button to leave the programming level. Changes will not be stored

Press the Info button to leave the programming level. Changes will be stored

Note: If no button is pressed for about 8 minutes, the screen will automatically return to the default display. Changes will not be stored. When switching to another level, changes will be stored.

Line Function Range Unit Resolution Default value

Time of day

1 Time of day 0...23:59 h / min 1 min ---

Setpoints

5 Reduced room temperature setpoint «TrSollRed» or

(reduced boiler temperature setpoint «TvSollRed») (When using an additional room unit, line 5 will be hidden)

Time program HK1 (heating circuit 1)

11 Time program HC1 switch-on time 1st period 00:00...24:00 hh:mm 10 min 06:00 12 Time program HC1 switch-off time 1st period 00:00...24:00 hh:mm 10 min 22:00 13 Time program HC1 switch-on time 2nd period 00:00...24:00 hh:mm 10 min 24:00 14 Time program HC1 switch-off time 2nd period 00:00...24:00 hh:mm 10 min 24:00 15 Time program HC1 switch-on time 3rd period 00:00...24:00 hh:mm 10 min 24:00 16 Time program HC1 switch-off time 3rd period 00:00...24:00 hh:mm 10 min 24:00

TRF...TRN °C 0.5 16.0

Figure 8.2.6 - Overview of Enduser parameters

8.2.7 - Start-up / initialisation

On startup after power-On, or after a lockout reset, the setpoints will be initialized. These setpoints apply until a first adjustment is made (e.g. via the screen display or PC parameterization): After a readjustment, these values will be overwritten with the new value and permanently stored in the LMU. When a new startup is made, or after power-On, the previous settings will be stored in the LMU. Also, the software version number of the operator module and that of the connected type of LMU... will be delivered.

8.2.8.1 - Chimney Sweep function

The chimney sweep function enables the boiler to be started up in heating mode by pressing both

buttons simultaneously for more than 3 seconds but for no more than 6 seconds.

On the display, the upper arrow of the maintenance function flashes and the currently selected temperature appears. This function serves for making measurements on the boiler. When the chimney sweep function is activated, the boiler will deliver maximum output until the limit thermostat cuts out. To ensure maximum supply of heat, the chimney sweep function generates the forced signal for heat supply. During the time that the Chimney Sweep is activated, an appropriate status code is delivered.

To close the function, press button

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8.2.8.2 - Controller Stop function

The controller stop function enables the boiler’s heat output to be adjusted manually in heating mode by

pressing both buttons simultaneously for more than 6 seconds.

On the display, both arrows of the maintenance function flash and the currently selected temperature appears and the display shows the adjusted relative boiler output. The function serves for making measurements on the boiler and allows the boiler output to be increased /

decreased by pressing buttons .

Minimum and maximum output can be directly selected by pressing the line selection buttons

Note: - If the controller stop function is triggered via PC tool ACS420, the current setpoint of burner output will

appear on the display, but the settings are locked.

To close the function, press button

8.2.8.3 - Time of day function

To ensure that this function operates, the time of day and time settings must be correctly set. Refer to section,

Parameter settings for Enduser, to setup the program.

Note:- each time button

is pressed during the time setting, the seconds are set to 0 and the clock

continues to run while making the setting.

8.2.9 - Heating circuit operating modes

The control provides 4 different heating circuit operating modes for LMU... heating circuit 1. They can be

directly selected depending on the requirements - see figure 8.2.9

The operating modes are selected by pressing button .

On the LCD, a pointer below the respective symbol points to the selected heating circuit operating mode.

8.2.10 - Error code display

In the event of a nonvolatile LMU... lockout position, fault is continually displayed. In addition, the diagnostic

code on the display flashes (refer to figure 8.2.4 and table 8.2.10).

To cancel the lockout position, press lockout reset button for at least 2 seconds.

8.2.11 - Display of operating phases (display level A4)

The operating phases according to the LMU…’s sequence diagram can be displayed (display level A4 press Info button 3 times). Assignment of the display code and the LMU...’s phase designation is as shown in figure 8.3.11

Operating mode Designation Effect of selection

Automatic operation Heating circuit 1 (HC1) according to time switch program 1

Standby Heating circuit 1 switched off

Frost protection functions active

Continuous ‘Normal’

operation

Continuous ‘Reduced’

operation

Figure 8.2.9

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Heating circuit 1 continuously on according to the adjusted nominal room temperature setpoint or heating circuit setpoint

Reduced room temperature set point or heating circuit frost protection setpoint

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8.3 - Functions

8.3.1 Frost Protection

Note: - to access this function, the circulating pump

must be wired to the LMU through a suitable contactor.

There are two levels of frost protection available dependent on the sensor options used.

1st stage - When the boiler water temperature is below 5°C, the burner and the heating pump are switched on. When the temperature increases and exceeds 15°C, the burner stops and the pump continues for the duration of the pump overrun.

2nd stage - This additional function uses the outside air temperature (if a sensor has not been fitted, the function is blocked) and provides three levels of activation.

 If the outside temperature is less than or equal

to –5°C, the pump operates continuously

 If the outside temperature is between –4 & 1.5°

C, the pump operates for 10 minutes every 6 hours.

 If the outside temperature is greater than 1.5°C,

the pump is switched off. Note:- any demand for dhw is given priority. Should protection be required for the building fabric,

then a QAA73 programmable room sensor must be used to maintain the internal building temperature.

8.3.2 Anti Legionella

To prevent the development of pathogenic bacteria in the domestic hot water tank during prolonged shut downs or low storage temperatures, the dhw must be heated once a week to a temperature greater than 60° C.

The anti legionella function heats the dhw once a week on Monday, after the first load, to 65°C.

8.3.3 Pump overrun

When the heating mode ends, the heating circuit pump remains on for a period (depending on the settings used - QAA73: 544).

In dhw systems, when the dhw heating period ends, the heating pump remains on until the return temperature drops below 70°C. During this period, the dhw selector valve (if fitted) is in the open position.

8.3.4 Pump or selector valve kick If either the heating circuit pump or dhw selector valve

have not been activated for more than 24hours, then during an off period the pump or valve is activated for 5 seconds.

8.3.5 Boiler overheat protection

The boiler flow sensor in combination with the return sensor, provide overheat protection as follows:

 If the first level temperature is exceeded, a fault

code is displayed.

 If the second level temperature is exceeded, an

alarm code is displayed and the boiler will switch off. The boiler must be reset to restart.

To restart the boiler, the temperature must fall, accordingly the fan and pump will continue to operate until the boiler heat exchanger temperature drops.

Additionally, should the T across the boiler heat exchanger exceed 25°C, the burner will reduce output to minimum rate. Should the T exceed 30°C, the burner will shutdown.

8.3.6 Anti-cycling

Dependent on the installation and the minimum firing rate of the boiler, the control monitors the heating temperature curve and will hold off a boiler from firing and thus reduce the number of operations.

8.3.7 Automatic summer / winter switching

Note: - This function is only available when an outside sensor is fitted.

The automatic summer/ winter switching function enables the summer mode to be switched to winter mode (vice versa) throughout the year, without the need for manual intervention.

The heating is shut down when the average outside temperature measured over the preceding 24hours is greater than 1°C above the set point (20°C).

The heating is automatically started up again when the average outside temperature measured over the preceding 24hours is less than 1°C below the lower limit of the hysteresis threshold of the set point (18° C).

Note: - The switch over setting is set to 19°C and can only be changed using the QAA73 room sensor.

The automatic mode must obviously be activated on the boiler as well as on the QAA73, for the function to operate. The function is automatically activated by a default setting in the QAA73.

8.3.8 - Start-up / initialisation

On startup after power-On, or after a lockout reset, the setpoints will be initialized.

These setpoints apply until a first adjustment is made (e.g. via the display or PC parameterization):

After a readjustment, these values will be overwritten with the new value and permanently stored in the LMU.

When a new startup is made, or after power-On, the previous settings will be stored in the LMU.

Also, the software version number of the operator module and that of the connected type of LMU... will be delivered to the display.

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Figure 8.2.10 LMU Error Codes

Error

code

10 Fault outside sensor 20 142 Short Circuit Boiler Flow Sensor Check temp sensor in water flow pipe & replace if nec-

28 Fault flue gas sensor 32 Fault flow temperature sensor 2 40 144 Short Circuit Boiler Rtn Sensor Check temp sensor in water rtn pipe & replace if neces-

50 Fault DHW temperature sensor 1 52 Fault DHW temperature sensor 2

61 Fault room unit 1 Check room device 62 Wrong room unit 1 or wrong radio clock con-

77 Fault air pressure sensor 78 Fault water pressure sensor 81 518 LPB Short Circuit or no power supply Check connections to clip in (switch off and isolate

82 Address collision on LPB... Check addresses of connected modules 91 Data overflow in EEPROM 92 Hardware fault in electronics 95 Invalid time of day Set correct time

100 2 clock time masters

105 Maintenance message P629 to reset : change from 0 to 1

110/111 Limit thermostat has cut out Allow the boiler to cool and reset thermostat

113 Flue gas supervision equipment has cut out 117 Water pressure too high 118 Water pressure too low 119 Water pressure switch has cut out Check water pressure 128 Loss of flame during operation Check connections to flame probe

130 Flue gas limit temperature exceeded 132 Safety shutdown Check gas pressure

133 No flame on completion of safety time Check operation of gas valve. Check spark igniter 134 Loss of flame during operation 140 Inadmissible LPB segment number/device N° 148 Incompatibility LPB... interface / basic unit

151 552 Relay clip in faulty Check connections to clip in

152 Fault in connection with LMU settings 153 LMU has locked out Press reset button

154 Flow Problems Check water flow through the boiler & Check the pumps 160 Fan speed threshold not reached Check obstructions in fan, burner & flue.

161 Maximum fan speed exceeded Check parameters 162 Fault air pressure switch (does not close) 164 Fault heating circuit flow switch / pressure

166 Fault air pressure switch (does not open) 180 Chimney sweep function active 181 Controller stop function active 183 LMU... in parameter setting mode

Internal Error-

Potential cause Actions

Code

0 No entry in code

essary

143 Open Circuit Boiler Flow Sensor Check connections to temp sensor in water flow pipe

Open Circuit Boiler Rtn Sensor Check connections to temp sensor in water rtn pipe

nected

switch

Check temp sensor in water flow connection & replace if necessary

sary

Check temp sensor in water rtn connection & replace if necessary

Connect compatible room control unit

boiler before working on mains wiring)

Investigate cause of overheating (see section 9.3)

Investigate flame probe condition Check combustion when boiler is firing

Check flue & condensate trap for blockages Check safety switches

Check and replace clip in module (switch off and isolate boiler before working on mains wiring)

(code appears if reset button is pressed when there are no faults)

Check non-return valve operates Check heat exchanger for debris

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8.3.9 - BMS 0~10v DC control of LMU Before programming changes are made, ensure the boiler is set to standby mode.

The following parameters need to be changed on the boiler LMU when a BMS 0-10 V signal is being used to control the boiler modules directly. All parameters can be changed using the keypad on the boiler display panel or via the computer link using the Siemens software.

Press and hold both up and down arrow keys for at least five seconds to enter advanced parameter list H90 displayed top right of HMI screen. Use either up or down arrow key to scroll through the parameter list and stop at H618 - Default value is 0 Two options for control are available :

Option 1 (

preferred option for multiple boilers on a modulating 0-10V signal controlling the load)

To enable 0-10v control over the boiler power range, change the setting by using the + or – key and set value to

5. Press mode button to store change and return to home screen.

Option 2 (

if the 0-10V signal is only being used to enable the boilers and is not modulating)

To enable 0-10v control over the boiler temperature set point, change the setting by using the + or – key and set value to 4. Press mode button to store change and return to home screen Press and hold both up and down arrow keys for at least five seconds to enter advanced parameter list H90 displayed top right of HMI screen. Use either up or down arrow key to scroll through the parameter list and stop at H622 - Default value is 80 Change this value to match the required flow temperature set point at maximum (10v) e.g. 80 = 80°C max set point. Press mode button to store change and return to home screen 0-10v signal wiring can now be connected to connections 15 and 16 of the terminal rail to control the boiler.

Boiler PC Req’d setting Function 618 526 4 0–10 V - temperature 618 526 5 0–10 V - load (preferred option for modulating load) 622 528 As req’d (80°C) Max temp = 10 V 623 529 As req’d (20%) Min % load = 20 % It may be necessary, depending on the operating temperature required, to raise the maximum operating temperature possible from the individual boiler modules. As standard the boiler modules leave the factory with a maximum operating temperature of 85°C. Where a higher operating temperature is required the following parameter change must be made. 505 181 As req’d (90°C) Max operating temp.

8.3.10 - Access to LMU Fault Log

The LMU control retains historical fault information of the last 6 faults, as read only via the Engineer level access. The current fault relates to the actual lockout at the time of the visit. Once reset, the current fault becomes the 1st fault and the remaining history is shifted back to the 5th fault, losing the previous 5th fault history.

The Albatros code is the ‘E’ display code supported by the internal code

Note :

When connecting to a QAA73 unit refer to Hamworthy OEM manual 500001140

When connecting to a Merley control unit refer to Hamworthy OEM manual 500001210

Figure 8.3.10—LMU Fault Log

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QAA73...

AGU2.310

700 1st past value of lockout code counter Engineer * 701 1st past value of lockout phase Engineer * 702 1st past value of internal diagnostic code Engineer * 728 1st past value of ALBATROS error code Engineer * 703 2nd past value of lockout code counter Engineer * 704 2nd past value of lockout phase Engineer * 705 2nd past value of internal diagnostic code Engineer * 729 2nd past value of ALBATROS error code Engineer * 706 3rd past value of lockout code counter Engineer * 707 3rd past value of lockout phase Engineer * 708 3rd past value of internal diagnostic code Engineer * 730 3rd past value of ALBATROS error code Engineer * 709 4th past value of lockout code counter Engineer *

710 4th past value of lockout phase Engineer * 711 4th past value of internal diagnostic code Engineer * 731 4th past value of ALBATROS error code Engineer * 712 5th past value of lockout code counter Engineer * 713 5th past value of lockout phase Engineer * 714 5th past value of internal diagnostic code Engineer * 732 5th past value of ALBATROS error code Engineer * 715 Current value of lockout code counter Engineer * 716 Current value of lockout phase Engineer * 717 Current value internal diagnostic code Engineer * 733 Current value of ALBATROS error code Engineer *

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Figure 8.3.11 - Operating phases

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Display Meaning

Internal operating phases of the LMU...

00 Standby (no demand for heat)

01 Prevention of startup

PH_STANDBY

PH_STARTVER

02 Fan runup PH_THL1_1

PH_THL1_2

03 Prepurging

PH_TV

04 Waiting time PH_TBRE

PH_TW1 PH_TW2

05 Preignition time

PH_TVZ

06 Safety time, constant PH_TSA1_1

PH_TSA2_1

07 Safety time, variable PH_TSA1_2

PH_TSA2_2

10 Heating operation PH_TI

PH_MODULATION Heating mode

11 DHW operation PH_TI

PH_MODULATION DHW mode

12 Parallel operation of space heating and

DHW heating

PH_TI PH_MODULATION

Heating and DHW mode

20 Postpurging with the last control of

operation

PH_THL2_1 PH_TN_1

21 Postpurging with control of prepurging PH_THL2_2

PH_TN_2

22 Home run PH_TNB

PH_TLO PH_TNN

99 Lockout position (display of the current

PH_STOER

error code)

Note: -If operating phases are passed very quickly or skipped, the relevant display code will not appear.

Figure 8.3.12 - Operating phases

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9.0 FAULT FINDING

The Fleet boiler is equipped with full self-diagnostic fault indication, with faults allocated a code, which is displayed (flashes) on the display - refer to section 8.3.9 - Maintenance functions.

The common fault codes are detailed in section 8.3.9 - Maintenance functions.. Fault codes not detailed in this manual should only be investigated by an Engineer.

Should a fault code appear which cannot be reset, or a fault code repeatedly occurs,

contact Hamworthy Heating for assistance. Do not continue to operate or use the boiler

as this may cause damage to the controls.

9.1 Safety Temperature Limiter (Limit Thermostat)

1. The electronic control thermostat has several safety levels built in such that a controlled shutdown should occur before the safety temperature limiter is activated. Should these safety levels be overridden (say external pump overrun failure after shutdown) the safety temperature limiter will trip initiating a boiler shutdown, preventing the boiler from firing. The code (110) on the controls display will flash indicating that the safety temperature limiter has tripped.

2. The safety temperature limiter is auto reset located on the top rear of the heat exchanger block. Once the boiler has cooled to normal operating temperature, pushing the reset pushbutton on the display (refer to section

8.1.1 - Controls Operation) will reset the lockout. Should the lockout code not extinguish and the boiler does not fire up, it is possible that the safety temperature limiter will not reset because the boiler is still too hot.

3. Always carry out an investigation to ascertain the reason for overheating. The most common cause of overheating is lack of water flow rate through the boiler possibly caused by a faulty pump or blockage in the heat exchanger circuit due to system debris.

9.2 Water Flow Switch

1. The water flow switch is located in the return pipe before the pump and the heat exchanger (see figure 9.2) and will prevent the boiler from firing should there be inadequate or no water flow. This is to protect the heat exchanger from damage in the absence of water (dry firing) which will cause catastrophic failure of the heat exchanger.

2. The operation of the flow switch can be checked by closing one of the isolating valves connecting the boiler to the system, this will generate error E164 on the LMU display.

Figure 9.2 - Water Flow Switch

9.3 Ignition Controller

1. The flame is under constant supervision by the burner ignition controller. The controller monitors the flame’s ability to rectify an AC current. If the flame diminishes for whatever reason and the rectified current drops below the controller’s minimum detection current (3µA DC), the controller will de-energise the gas control valve within 1 second and commence a restart. Failure to establish and detect a flame during the light-up sequence will result in burner shutdown and lockout within 5 seconds, requiring a manual reset to restart the ignition sequence. Refer to section 8.3.9—Maintenance functions..

2. If the boiler continues to lockout, then an investigation must be made to ascertain the cause. Refer to figure

8.3.10 - Operating faults, for possible causes of lockout.

3. A false flame signal at the start and during pre-purge will cause the boiler module to restart its ignition sequence at the end of the pre-purge period. If this occurs 3 times in succession the controls will disable operation of the boiler module, requiring reset of the module. Refer to section 8.3.10 - Operating faults

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Figure 9.3.1- Wiring Diagram

LPB bus to casc ade co ntrol

Boi ler r un sign al out

Boiler fault signal out

Sign al s upply in 0-23 0V

0-10 V Ana logue input from BMS

GAS

PRESSURE

SWITCH

BLUE

HALL

PWM

DC FAN

1 +V

RED

BLUE

GREEN

YELLOW

X15

X14

X13

WATER FLOW

SWITCH

FLUE GAS TEMP.

RED

BLUE

RED

X12

FLOW TEMP.

SENSOR

RETURN TEMP.

SENSOR

RED

BLUE

OUTSIDE SENSOR

BLUE

RED

BLUE

10 10

11 11

12 12

X11

(T17 - T18)

X10-06

BROW N

SAFETY INTERLOCK

REMOTE ON/OFF

(T19 - T20)

BROWN

21212122

X10-05

X10-04

X10-03

COM

FLUE

PRESSURE

(T13 - T14)

ROOM

THERMOSTAT

X10-02

X10-01

SWITCH

AGU2.31A109

FASCIA DISPLAY

& KEYPAD MO DULE

X30

(T21-T22)

7 6 5 4 3 2

(T6 - T7) (T8 - T9) (T10-T11)(T15-T16)

X41-01

3 2

X52-03

OCI420A109

CLIP-IN

LPB BUS

INTERFACE

(OPTIONAL)

LMU64

BOILER

SIEMENS

CONTROL

X40X50

X30

X52-02

X52-01

X51-01

AGU2.511A109

CLIP-IN

FUNCTION

X50 X40

MODULE

Safety Interlock (Link If Not Used)

Rem ote O n/Off Input Signal

Lock-Out

BMS or

Contacts rated

Powered Output

Powered

230V~50Hz, Max 1A

Output Supply

Secondary Pump Output

230v~50Hz

LPB Bus

Outside Sensor

Analogue Input

Normal Run

Main s Supply

NOT USE D

NOT USED

Ground

Slave Signal

Groun d

24VDC

Ground

5VDC

Ground

0~10 V

Ground

24VD C

NOT USED

Neutral

Line Out

Neutral

Line O ut

Neu tra l

Liv e

Neutral

Live

Neutral

Live

Earth

X1-01

Fuse 2A

LNE

ON/OFF SWITCH

IEC MAINS OUTLET

POWER SUPPLY

X2-01

X1-02

121212123

BLUE

BROWN

23321

321

230V 50Hz

FAN

X2-02

X2-03

X2-04

X2-05

X3-01

X3-02

X3-03

X3-04

1212121

BROWN

BLUE

PUMP

BLACK

BLUE

BROW N

BLUE

BROWN

BLACK

BLUE

BROWN

GREEN/YELLOW

211

230V

HT 0V

SPARK GENE RATOR

213

GAS

PROBE

SAFETY LIMIT THERMOSTAT

FLAME IONISATION

VALVE

HT ELECTRODE

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10 SERVICING

A competent person registered for working on non domestic gas appliances should check and ensure that the flue, its support and terminal, the ventilation to the boiler house, safety valve, drain, water filter if fitted, pressure gauge, etc.; are in a serviceable and working condition and still comply with the relevant standards and codes of practice - see Section 4.

10.1 Regular servicing is recommended, preferably by a Hamworthy appointed person, and at least annually, to ensure trouble free operation. For Fleet boilers, Hamworthy would recommend an additional 6 monthly examination following commissioning, acknowledging site conditions and running hours. Although cleaning of flueways may not be necessary on a yearly basis, it is important that all controls and safety features are checked for correct operation. Note:- Measuring flue gas CO

and gas temperatures

will give an indication of the state of the boiler flueways and waterways. Results should be compared with previously measured values to establish possible loss of efficiency.

10.2 Annual Service

Before servicing the boiler, the following procedure must be carried out :-

WARNING: Isolate all electrical supplies and turn off the gas service valve.

1) Open the front casing by turning the 1/4 turn latches

with a flat bladed screw driver. Note the latch mechanism passes through slots in the chassis top and bottom. Once removed access is gained to the controls panel, the heat exchanger components and the combustion system assembly.

2) Disconnect the H.T and flame probe connectors from the respective probes.

3) Disconnect the fan power supply and control leads from the fan taking care with the latch on each connector.

4) Check that the gas service valve is closed, then undo the compression union on the inlet to the gas valve.

5) Carefully disengage the flexible air inlet duct from the venturi and remove the electrical plug from the gas valve.

6) Remove the 3 M6 socket head screws securing the fan /burner duct assembly to the heat exchanger and carefully remove the assembly and the sealing gasket. Carefully remove the burner from the heat exchanger,.

7) Remove and inspect H.T. electrode and flame probe, ensure they are free from debris or deposits. – See Figures 10.2. 10.2.1 & 10.2.2

8) Check the burner and clean using a soft brush if required (if possible use a vacuum cleaner to remove

the dust from inside the burner tube). After cleaning the inside, the burner tube can be washed using a soapy water solution. Tap the burner flange firmly downwards on a block of wood to dislodge any residual debris from inside the burner tube. A damaged or cracked burner should be replaced.

Note:- Do not use a wire brush to clean the burner.

9) Carefully remove the insulation pad from the heat

exchanger back plate (accessed through the burner cavity) and replace with a new pad ensuring the edges are ‘tucked in’ to the gap past the last section

10) Separate the gas valve / venturi from the fan inlet noting it’s orientation and inspect the fan scroll and impellor, clean and check for damage.

11) Clean and check the venturi for contamination.

12) Remove the fan from the burner duct and inspect

the non return valve in the duct for smooth operation.

13) Separate the inlet flange /elbow fitting from the gas control valve by removing the 4 M5 socket cap head screws. Check that the mesh inlet filter in the gas valve is clear of debris, remove any foreign objects caught in the filter. Re-assemble in reverse order taking care to inspect and if necessary, replace any o-rings, gaskets or seals. Refer to Section 8, Commissioning and Testing, and test all gas joints broken or disturbed for soundness before firing. Carry out a combustion check by testing the flue gas CO

and CO levels as detailed in Section 8.2.

10.3 Four Year Service

Repeat the annual service as previously described but do not refit any components to the heat exchanger. Isolate the boiler flow and return connections from the heating system.

10.3.1 To clean the heat exchanger, the use of a high pressure water hose (40-80 psi) is recommended for the primary flue gas path. However provision must be made for the drainage of water used in this process. At the rear of the boiler remove the condensate drain trap assembly from the flue elbow. Connect a hose (32mm id.) to the flue elbow and take to a suitable drain or receptacle. The cleaning water and any debris will exit the sump through this opening.

To clean the condensing flue gas path, isolate the boiler from the heating system and drain the boiler heat exchanger using the drain valve provided in the return pipe. Disconnect the electrical supply to the pump, return sensor and the flow switch. Carefully support the pump, disconnect the unions and remove the pump. Remove the 2 M6 screws securing the return elbow / pipe assembly to the heat exchanger and carefully remove the assembly. Remove the 4 screws (M8) securing the heat exchanger assembly to the chassis backplate. Disconnect the heat exchanger flow connection from the heating system and the flue pipe from the sump elbow and carefully slide the heat exchanger assembly

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Figure 10.2 - Combustion Chamber

HAMWORTHY HEATING LTD

Figure 10.2.1 - Spark Electrode position

Figure 10.2.2 - Flame Probe position

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forward. With the heat exchanger removed from the appliance, remove the plastic sump from the heat exchanger sealing plate and withdraw the sump away from the sealing plate. The heat exchanger fin matrix is now accessible and the flue ways can be cleaned using a 25mm wide * 1mm thick* 400mm strip to clean between the fins, ensuring that any debris is collected .

When clean, re-assemble in reverse order using new seals /gaskets where appropriate.

Re-fit the pump and return pipe assembly. Open the isolating valve and test all joints broken or disturbed for water soundness.

Re-fit the burner assembly. Test all gas joints broken or disturbed for soundness before firing.

Refer to Section 8 Commissioning The Boiler.

11.0 REPLACEMENT OF FAILED COMPONENTS

There are a number of components listed below which can be replaced simply and quickly by following the given procedure. In each case the operation of each replaced component must be checked by carrying out the appropriate part of the commissioning procedure. See

Section 8: COMMISSIONING & TESTING. Note:- Isolate all electrical supplies to the boiler module before opening the front cover and commencing any servicing or component exchange procedure. Turn off the gas at the service valve.

11.1 HT Electrode and Flame Probe - Part nos. 533805029 & 533805021 Note:- The electrode and flame probe ceramics are very fragile.

Disconnect the HT cable from the electrode. Remove the 2 M4 screws securing the electrode to the heat exchanger and carefully remove the electrode and it’s gasket. Check the condition of the ceramic, wires and the spark gap. Adjust if necessary. In replacing the electrode, fit a new gasket and take care when feeding the wires through the heat exchanger aperture. Carefully reconnect the HT cable to the electrode. Disconnect the cable from the flame probe. Remove the 1 M4 screw securing the probe to the heat exchanger and withdraw the probe. Check the condition of the ceramic and wire. In replacing the probe fit a new gasket and refit the cable. To check the position of the electrode and probe in relation to the burner, remove the burner and refer to Figures 10.2. , 10.2.1 & 10.2.2

11.2 Flow / Return sensor - part no. 533901549 Note: The flow/return sensors are immersed in the water circuit. To remove/replace will require the heat exchanger to be drained.

The two identical sensors are located in the return elbow and flow elbow. Prior to removal, check the resistance of the sensor against Figure B 1.3 In refitting the sensor, a sealant will be required on the threads. Check for water soundness before firing the boiler.

11.3 Flue Gas sensor - Part no. 533901549

The flue gas sensor is located in the flue elbow. Prior to removal, check the resistance of the sensor against Figure B 1.3 In refitting the sensor, a sealant will be required on the threads. Check for soundness of the joint when firing the boiler.

11.4 Temperature Limiter (Limit Stat) Part no. 533901583

The limit stat is a bi-metallic disc type located on the top of the last heat exchanger section, secured by a spring clip. The thermostat can be accessed through the rear panel. Remove the thermostat from the clip and disconnect the electrical connections. Beware the

terminals are 230v! When refitting the control ensure that it is fully engaged in the clip.

11.5 Water Flow switch - Part no. 533901548 Note: The flow is immersed in the water circuit. To remove/replace will require the heat exchanger to be drained.

The water flow switch is located in the return pipe on the pump inlet. Undo the union and carefully withdraw the switch assembly from the pipe. The switch consists of a magnetic reed switch providing open or closed circuit. In fitting a replacement switch ensure that a new sealing gasket is used.

11.6 Gas Valve Part no. 533903040 - F40 - F70H Part no. 533903044 - F85 - F150H All models - isolate the gas supply using the valve

located in the bottom left hand corner. Disconnect the electrical lead and pressure sensing tube.

Models F40 H, F50H, F60H& F70H

Remove the 4 - M4 screws securing the inlet elbow to the gas valve. Support the weight of the valve and remove the 3 - M4 screws securing the valve to the venturi. Replace the gas valve using new seal / ‘o’ ring.

Models F85H/F100H/F125H & F150H

Remove the 4 - M5 screws securing the inlet fitting to the gas valve. Support the weight of the valve and remove the 4 - M5 screws securing the gas valve and spacer assembly to the venturI. Remove the 4 - M5 screws securing the spacer to the gas valve. Replace the gas valve using new ‘o’ rings. All models - reassemble in reverse order and check all joints for gas soundness.

11.7 Fan Part no. 533901376 - F40 - F70H Part no. 533704009 - F85 - F125H Part no. 533704010 - F150H

To remove the fan it is preferable to remove the complete fan, gas valve and venturi assembly. To improve access, remove the casing top panel. Disconnect the electrical lead and pressure sensing tube from the gas valve. Disconnect the two electrical plugs (power supply and speed control signal) from the fan motor. Disconnect the gas supply from the inlet to the gas valve. Loosen the worm drive securing the air inlet duct to the venturi.

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Remove the 4 - M5 screws securing the fan assembly to the burner transition duct. Take care not to drop any screws into the duct opening. Carefully withdraw the complete assembly from the air inlet and place on a suitable working area. Remove the screws securing the gas valve and venturi assembly to the fan inlet, noting the position of the venture. All models - reassemble in reverse order using new gaskets and check all joints for gas soundness.

11.8 Main control pcb - LMU - refer to spares list

The LMU is located on the electrical control panel which is secured to the boiler chassis by 2 spring latches. Pull the panel forward to disengage the latches. If a ‘clip in module’ is fitted, this must be removed and transferred to the new LMU. Carefully disconnect the plug connecting the clip in to terminal X40 or X50. Depress the latch at the plug end of the clip in and disengage the module from the LMU. Unplug all electrical connections from the LMU noting respective positions. Remove the 4 - M5 screws securing the LMU to the panel and withdraw. Fit the replacement control in reverse order. Remember to apply the parameters local to the installation - refer to section 8.

11.9 Display screen - Part no. 533901437

Carefully disconnect the ribbon cable connecting the screen to the LMU terminal X30. Remove the 4 screws securing the screen to the fascia moulding, taking care not to loose the button covers, which are loose when the assembly is separated. Refit the button covers to the new display and secure to the fascia moulding.

11.10 Low gas pressure switch - Part no. 533901497

Isolate the gas supply using the valve located in the bottom left hand corner. Disconnect the electrical plug after removing the securing screw. Remove the screw securing the switch to the gas inlet fitting on the gas supply pipe. When re-fitting a replacement switch remember to set the operating pressure to 12mbar.

11.11 Air Pressure Switch - Part no. 532496004

Disconnect the sensing tube from the switch noting the position. Disconnect the electrical connections noting their position. Remove the 2 screws securing the switch to the control panel. The replacement switch is factory set.

12.0 RECOMMENDED SPARES

Please Note:- To ensure the correct spare parts are despatched by our spares department, it is imperative that the

complete Boiler/Module/Control Panel Serial Numbers are given. The Boiler and Module Serial Numbers are located on the Data Plates affixed to the combustion chamber front panel. The Electrical Panel Serial Number is located inside the Control panel on the rating label. These numbers MUST be quoted when ordering spare parts.

SPARES ITEM PART No.

ELECTRICAL ITEMS

LMU control - F40H Nat Gas ........................................................................................................................................ 533901623

LMU control - F50H Nat Gas ........................................................................................................................................ 533901624

LMU control - F60H Nat Gas ........................................................................................................................................ 533901625

LMU control - F70H Nat Gas ........................................................................................................................................ 533901626

LMU control - F85H NatGas ......................................................................................................................................... 533901627

LMU control - F100H Nat Gas ...................................................................................................................................... 533901628

LMU control - F125H Nat Gas ...................................................................................................................................... 533901629

LMU control - F150H NatGas ....................................................................................................................................... 533901630

Display PCB ................................................................................................................................................................... 533901437

HT Ignition Transformer ............................................................................................................................................... 533901542

Flow / Return Sensor ...................................................................................................................................................... 533901549

Flue Gas Sensor . ........................................................................................................................................................... 533901549

Water Flow Switch . ........................................................................................................................................................ 533901548

Temperature Limiter ....................................................................................................................................................... 533901583

HT Ignitor Electrode ........................................................................................................................................................ 533805029

HT Ignitor Lead .............................................................................................................................................................533901547

Flame Sensing Probe ..................................................................................................................................................... 533805021

On/Off switch . ................................................................................................................................................................ 533925009

Fascia fuse T2A . ............................................................................................................................................................ 533922009

Clip in Module - vfc + 0~10v - AGU2.511A109 ............................................................................................................ 533901438

Clip in Module - LPB Bus communication - OCI420A109 ........................................................................................... 533901456

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MECHANICAL ITEMS

Burner Fabrication - F40H /F50H .............................................................................................................................533301030

Burner Fabrication - F60H /F70H . .............................................................................................................................533301031

Burner Fabrication - F85H /F100H ..............................................................................................................................533301032

Burner Fabrication - F125H ........................................................................................................................................533301033

Burner Fabrication - F150H ........................................................................................................................................533301034

Gas Control Valve - F40H/F70H ...............................................................................................................................533903040

Gas Control Valve ‘O’ ring - F40H/F70H. .................................................................................................................531299051

Gas Control Valve - F85H/F150H ................................................................................................................................ 533903044

Gas Control Valve ‘O’ ring - F85H/F150H ................................................................................................................... 742111245

Combustion Fan - F40H/F70H ...................................................................................................................................533901376

Combustion Fan - F85H/F100H/F125H .....................................................................................................................533704009

Combustion Fan - F150H............... .............................................................................................................................533704010

Venturi - F40H/F50H ...................................................................................................................................................532418008

Venturi - F60H/F70H ...................................................................................................................................................532418005

Venturi seal - F40H/F70H .........................................................................................................................................531201067

Venturi - F85H/F150H ..........................................................................................................................................532418007

Venturi seal - F85H/F150H ........................................................................................................................................742121238

Low Gas Pressure Switch ..........................................................................................................................................533901497

Air Pressure Switch ....................................................................................................................................................532496004

Flue System Non Return Valve ...................................................................................................................................530650455

Safety Pressure Relief Valve ......................................................................................................................................531905013

Gasket - Burner to heat exchanger ...................................................................................................................531201162

Gasket - Fan to burner duct .......................................................................................................................................531201168

Gasket - Burner duct ..................................................................................................................................................531299041

Gasket - Ignitor ..........................................................................................................................................................531201160

Gasket - Probe ..........................................................................................................................................................531201161

Pump F40H/F70H .......................................................................................................................................................530905059

Pump F85H/F125H .. ..................................................................................................................................................530905060

Pump F150H... .............................................................................................................................................................530905061

Gasket - Pump ............................................................................................................................................................531201150

View Port Sight Glass ..................................................................................................................................................339907043

Air inlet filter ...................................................................................................................................................................532812008

Heat exchanger insulation pad ....................................................................................................................................533806119

CASING ITEMS

Front door panel ..........................................................................................................................................................560650267

LH side panel - F40 / F100H .......................................................................................................................................530650469

RH side panel - F40 / F100H... ....................................................................................................................................530650470

LH side panel - F125 / F150H. ...................................................................................................................................530650471

RH side panel - F125 / F150H. ..................................................................................................................................530650472

Top Panel - F40 / F100H.. ...........................................................................................................................................530650477

Top Panel - F125/F150H. ...........................................................................................................................................530650478

For service or spares please contact :-

Hamworthy Heating Ltd Phone Number ..............................01202 662500

Fleets Corner Fax Number .....................................01202 665111

Poole Service .............................................01202 662555

Dorset BH17 0HH Spares ..............................................01202 662525

Technical .........................................01202 662500

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APPENDIX A - GAS DATA

GENERAL DATA

F40H

BOILER MODEL

F50H

F60H

F70H

Boiler Input (maximum) - kW (Gross) 41.0 51.3 61.5 71.8 Boiler Input (maximum) - kW (Nett) 36.9 46.2 55.4 64.7 Boiler Output kW (maximum) condensing 50/30°C - kW 40 50 60 70 Boiler Output kW (maximum) non condensing 80/60°C - kW 36.1 45.1 54.1 63.2 Boiler Output (minimum) 80/60°C - kW 7.2 9.0 10.8 12.6

F85H

F100 F125H F150H

Boiler Input (maximum) - kW (Gross) 87.2 102.6 128.2 153.8 Boiler Input (maximum) - kW (Nett) 78.5 92.4 115.5 138.6 Boiler Output kW (maximum) condensing 50/30°C - kW 85 100 125 150 Boiler Output kW (maximum) non condensing 80/60°C - kW 76.7 90.3 112.8 135.4 Boiler Output (minimum) 80/60°C - kW 15.3 17.9 21.6 26.9

GAS DATA - per boiler module

Gas Inlet Connection Pipe Thread Size

Nominal Inlet Pressure Nat Gas -mbar

F40H F50H

R ¾” R ¾” R ¾” R ¾”

F60H F70H

Maximum Inlet Pressure Nat Gas -mbar 25

Gas Pressure Switch Setting Nat Gas -mbar

Gas Flow Rate (max. per module) Nat Gas -m3/h

Target CO2 % at High / Low fire Nat Gas ±0.25%

Gas Inlet Connection Pipe Thread Size

Nominal Inlet Pressure Nat Gas -mbar

3.9 4.8 5.8 6.8

F85H F100H

R ¾” R ¾” R 1” R 1”

12.5

9.0

F125H F150H

Maximum Inlet Pressure Nat Gas -mbar 25

Gas Pressure Switch Setting Nat Gas -mbar

12.5

Gas Flow Rate (max. per module) Nat Gas -m3/h 8.25 9.7 11.7 14.6

Target CO2 % at High / Low fire Nat Gas ±0.25%

9.0

Figure A1– Gas data

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APPENDIX B - ELECTRICAL CONNECTIONS AND CONTROLS

ELECTRICAL DATA - per boiler module

Nominal supply voltage

Power Consumption (maximum) - W Start and Run Current (per module) - A

Nominal supply voltage

Power Consumption (maximum) - W Start and Run Current (per module) - A

Figure B1.1 - Electrical supply

B1.1 Electrical Supply

F40H

140 160 160 160

0.85/0.35 0.85/0.35 0.85/0.35 0.85/0.35

F85H

350 450 350 600

2.1/1 2.1/1 2.1/1 2.4/1.2

BOILER MODEL

F50H

230V ~ 50Hz

F100H

230V ~ 50Hz

F60H

F125H

F70H

F150H

IMPORTANT: Individual boilers must be earthed.

The boiler must be isolated from the mains electricity supply in the event of electric arc welding being carried out on any connecting pipe work.

1. Wiring external to the boiler must be installed in accordance with the IEE Regulations and any local regulations which apply. Wiring must be completed in heat resistant 3-core cable of 1.0mm² cross sectional area. Boilers are normally supplied for connection to a 230 volts, 50Hz mains supply. The boiler control is supplied with a replaceable fuse (T4A). External fuses should be 6A for all boilers.



2. 3-Phase Electrical Supplies. Individual modules of Fleet boilers and any boilers installed in close proximity to each other MUST NOT be supplied from different phases of a 3 phase supply. The method of connection to the mains electricity supply must facilitate complete electrical isolation of the single boiler / battery with a separation of at least 3mm in all poles.

3. A mains isolator must be provided adjacent to the boiler in a readily accessible position. The supply should only serve the boiler.

4. Multiple modules. It is highly recommended that each boiler is connected via its own mains isolator to facilitate servicing and maintenance of the individual boiler whilst leaving the remaining boilers in operation.

5. Further details regarding connection to the electricity supply are given in BS EN 60335, Part 1 or BS 3456, Part

201.



WARNING: THE MAINS POWER SUPPLY MUST NOT BE SWITCHED

BY A TIME-CLOCK CONTROL.

CAUTION: DO NOT FEED MAINS VOLTAGE ONTO THE TIMER TERMINALS

6. The mains power supply must be maintained at all times. Each Fleet boiler module incorporates a remote enable link, which can be used to operate the boiler(s) under a timed regime. The boiler controls provide a 24V DC signal that can be fed through a volt free contact for operation. Refer to BS 6644 for further information on installing the electrical supply.

7. The integral pump in Fleet boilers is managed by the LMU boiler control.

NOTE: FOR BASIC TERMINATION DIAGRAM SEE FIGURE 4.6

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Figure B1.2 - External Control Wiring for Multiple Module Installation

Option 1 Remote Control

External

Control

Control Si gnal 0~10V or Enabl e

LNE

Local Isolator

Opti on 2 Merl ey Cas cade Control

Opti onal Ex ternal

Control

Control Si gnal 0-10V or enabl e

Boiler 1

Terminal Rail

13 14

21 22

15 16

0~10V

Boiler 2

Terminal Rail

15 16

0~10V

LPB Bus

Note:- each module requires independent i sol ation of electric al s upply and control signals. Signal cables must not be run i n the same c onduit as mains voltage cables

Opti on 1 - r eferenc e shoul d be made to Building Regulations and CIB SE Guide ‘Ener gy E ff iciency in Buil dings ’ for controls requi rements . All modules must be sequenced.

Enable - will give On/Off control of the modules 0~10V - will give modulation control of each module Opti on 2 provi des modulati on control of up to 16 modules.

Boiler 3

Terminal Rail

15 16

13 14

0~10V

21 22

BMS Connections

For 0 - 10v connection, the input signal must be connected to terminals 15 & 16 - see figure 4.6 Note: any safety interlocks MUST be wired across the 0– 10v circuit using suitable low voltage contact ratings.

For connection of an external alarm device, use terminals 8 & 9, which are volt free and rated at 230v - see figure

4.6

For an optional programmable room thermostat, use connector X10-01 on the LMU - see figure B.1.3

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Figure B1.3 - Sensor resistance values

T [°C] R[Ohm] T [°C] R[Ohm] T [°C] R[Ohm]

-30.0 175203 50.0 3605 130.0 298

-25.0 129289 55.0 2989 135.0 262

-20.0 96360 60.0 2490 140.0 232

-15.0 72502 65.0 2084 145.0 206

-10.0 55047 70.0 1753 150.0 183

-5.0 42158 75.0 1481 155.0 163

0.0 32555 80.0 1256 160.0 145

5.0 25339 85.0 1070 165.0 130

10.0 19873 90.0 915 170.0 117

15.0 15699 95.0 786 175.0 105

20.0 12488 100.0 677 180.0 95

25.0 10000 105.0 586 185.0 85

30.0 8059 110.0 508 190.0 77

35.0 6535 115.0 443 195.0 70

40.0 5330 120.0 387 200.0 64

45.0 4372 125.0 339

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APPENDIX C - FLUE DATA - Natural Gas

FLUE DATA per boiler module

F40H

BOILER MODEL

F50H

F60H

Flue connections (concentric) - mm 80/125

Flue /Air connections (twin duct) - mm 100

Flue connection (B23 open flue) - mm 100

Approx. Flue Gas Temperature @ 80/60°C - °C (Gross) 60

Approx. Flue Gas Temperature @ 50/30°C - °C (Gross) 40

Pressure at the boiler flue outlet - Pa/mbar Approx. Flue Gas Volume @ 9% CO

- m3/h*

150 150 150 150

52 65 78 91

F85H

F100H

F125H

Flue connections (concentric C13 & C33) - mm 80/125 100/150

Flue /Air connections (twin duct C53) - mm 100

Flue connection (B23 open flue) - mm 100

Approx. Flue Gas Temperature @ 80/60°C - °C (Gross) 60

Approx. Flue Gas Temperature @ 50/30°C - °C (Gross) 40

Pressure at the boiler flue outlet - Pa/mbar Approx. Flue Gas Volume @ 9% CO

- m3/h*

150 150 150 150 110 130 163 195

F70H

F150H

* Note:- Flue gas volumes are corrected to a flue gas temperature of 15°C and barometric pressure of

1013.25mbar.

C1.0 FLUE SYSTEM

1. Detailed recommendations for flue systems are given in BS 6644, and IGE/UP/10. All flue discharges for plant exceeding 150kW output must comply with the third edition of the 1956 Clean Air Act Memorandum.

WARNING: THE FLUE DISCHARGE FROM A FLEET BOILER WILL GENERATE A PLUME

AT THE TERMINAL EXIT. THIS MUST BE CONSIDERED WITH REGARD TO TERMINAL

LOCATION AND ADJACENT BUILDING FABRIC.

FOR ALL B23 INSTALLATIONS THE HHL SUPPLIED AIR INLET FILTER (Pt. No. 532812008) MUST BE FITTED

C1.1 General Requirements

The Fleet boilers are designed to be used with natural draught or room sealed flues. Flue systems should be

designed in accordance with regulations and with reference to BS 6644 and IGE/UP/10.

The following points should be noted:

a. Due to the high thermal efficiency of the boiler, condensation will occur in the flue. It is strongly recommended that the design of the flue system recognises this. HHL supply plastic flue components and suitable terminals to discharge the flue gases safely. The Fleet flue systems supplied by Hamworthy are non UV stabilised polypropylene and are therefore suitable for internal use only. For external flue runs and termination, either use the dedicated kits supplied by Hamworthy or refer to a chimney specialist .

b. Care should be taken to ensure that the flue is installed such that any condensation is continuously drained. Any flue system with a horizontal section should have a maximum slope of 3° upwards in the direction of the exhaust gas flow. All joints should be such that any condensation is directed back down the slope to an open drain connection in the flue. The drain pipe must be manufactured from a corrosion resistant material and at least 15mm diameter. It must have a fall of at least 3° (approx. 50mm/meter) and connect to a drain via a waste trap.

c. Boiler flue outlet sizes - A flue system designed with the same diameter as the boiler flue outlet may not provide satisfactory performance in all applications. Consideration must be given to the correct calculation of the required flue size. If in any doubt consult Hamworthy Heating Ltd who can supply a full flue design and installation service.

C1.2 Waste Gas Volume and Temperature.

It is recommended that the volume and temperature of the waste gases used for design of the flue system are as given in the above tables.

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C1.3 Materials.

Materials used for the flue system must be mechanically robust, resistant to internal and external corrosion, noncombustible and durable under the conditions to which they are likely to be subjected. Consideration must be given to avoid possible freezing of condense water traps and pipe work.

C1.4 Suction

The flue system must be designed acknowledging that there is a positive pressure generated by the boiler combustion fan. Refer to table Appendix C. The flue system must be designed to limit the max. suction (cold) to 30Pa negative, measured at the connection to the boiler. If the suction is greater than 30Pa, refer to HHL technical. This condition must then be checked hot and with all boilers firing, the max. pressure at the connection to the boiler should be 150Pa positive. In the event that the flue system when hot does generate a suction, the max. suction is 100Pa. Any stabiliser fitted must be in or close to the vertical chimney.

C1.5 Disconnection

Provisions should be made for disconnection of the flue pipe for servicing. It is advisable that bends are fitted with removable covers for inspection and cleaning as appropriate.

WARNING: THE FLUE SYSTEM MUST BE SELF SUPPORTING AND NOT PRESENT

A RISK TO PEOPLE IN OR AROUND THE BUILDING.

C1.6 Flue Discharge

The flue system must ensure safe and efficient operation of the boiler protecting the combustion process from wind effects and dispersing the products of combustion to the external air. The flue must terminate in a freely exposed position and be so situated as to prevent the products of combustion entering any opening in a building. Where the flue diameter is less than 204mm (8”) diameter a terminal must be fitted. Where the flue is of a larger size, consideration should be given to the fitting of a flue discharge terminal or grille to stop ingress of birds etc.

C1.7 Surface Temperatures

Combustible materials in the vicinity of the boiler and flue shall not exceed 65°C during boiler operation. The flue shall not be closer than 50mm to any combustible material, except where it passes through such material with a non-combustible sleeve when the air gap may not be less than 25mm.

C1.8 Location

The flue system must not be placed or fitted where there is undue risk of accidental damage to the flue pipe or undue danger to persons in the vicinity. Check that the flue and chimney are clear from any obstruction. Fleet boilers are suitable for installation in a balanced compartment in accordance with the requirements of BS 6644. Consult Hamworthy Heating Technical Department for help or assistance if in doubt. For B23 applications the HHL supplied air inlet filter (Pt. No. 532812008) must be fitted to the boiler to ensure the correct air inlet requirements.

C1.9. Condensate Discharge

Due to the high thermal efficiency of the boiler, condensation will occur within the boiler casing during firing from cold conditions. A drain with an integral trap is fitted to each module suitable for connection to a 40mm o.d. plastic waste pipe (not Hamworthy Heating Ltd supply), which must be connected to a tundish (not Hamworthy Heating Ltd supply). Discharge piping from a tundish should be of synthetic material due to the mild acidity of the condensate (pH3-5), with all discharge piping having a minimum fall of 50mm/m away from the boiler. Consideration should be given to possible freezing of condense water traps and pipe work. This must be avoided at all times by routing pipe work within the building, where possible. In addition to the above, should the plastic flue system supplied discharge into a metallic chimney system, any condensate formed in the chimney MUST NOT drain back through the plastic components to the boiler. A separate drain for the chimney system must be provided.

HAMWORTHY HEATING LTD

FLEET H series

500001212/F

Page 59

1085 max

1040 min*

Figure C1.1 - Room sealed concentric C13 horizontal flue system

Equivalentlengths(m)

Model FluesizeØ

MaxL 45° 90° cond.Drain 40 80/125 29 0.75 1 0.5 50 80/125 19 0.75 1 0.5 60 80/125 12 1.5 2 0.5 70 80/125 8 1.5 2 0.5 85 80/125 3 2 3 0.5 100 80/125 1 3 4 0.75 125 100/150 6 1 1.5 0.75 150 100/150 3 1 1.5 0.75

Equivalentlengths(m)

Model FluesizeØ

MaxL 45° 90° cond.Drain 40 100/150 59 0.5 0.75 0.5 50 100/150 39 0.5 0.75 0.5 60 100/150 29 0.75 1 0.5 70 100/150 19 0.75 1 0.5 85 100/150 14 0.75 1 0.5 100 100/150 9 1 1.5 0.75 125 100/150

 6 1 1.5 0.75

150 100/150 3 1 1.5 0.75

StandardHorizontal ﬂuekit80/125Ø

StandardHorizontal ﬂuekit100/150Ø

ExtendedHorizontal ﬂuekit80/125Ø

HHLPartno

562511077

HHLPartno

562511078

HHLPartno

562511079

Opons: 80/125Ø87°Elbow 532511124 80/125Ø45°Elbow 532511123

80/125Ø*1m 532511139 80/125Øcond.drain 532511162

ExtendedHorizontal ﬂuekit100/150Ø

HHLPartno

562511080

Opons: 100/150Ø87°Elbow 532511118 100/150Ø45°Elbow 532511116

100/150Ø*1m 532511132

HAMWORTHY HEATING LTD

Figure C1.1.1 - Individual Flue equivalent lengths - refer to fig. C1.1 & C1.2

FLEET H series

500001212/F

Page 60

1100 min

30mm/m fall to boiler

Concentric inline

1000

drain & trap to drain

Figure C1.2 - Room sealed concentric C13 horizontal flue system

580 min

930 min

(80/125)

(100/150)

1200 min*

Figure C2.1 - Room sealed concentric C33 vertical flue system

HAMWORTHY HEATING LTD

1350 (80/125)

1730 (100/15 0)

1200 min

FLEET H series

500001212/F

Page 61

Equivalentlengths(m)

Model FluesizeØ 40 80/125 29 0.75 1 0.5 50 80/125 19 0.75 1 0.5 60 80/125 12 1.5 2 0.5 70 80/125 8 1.5 2 0.5 85 80/125 3 2 3 0.5 100 80/125 1 3 4 0.75

Model FluesizeØ 40 100/150 59 0.5 0.75 0.5 50 100/150 39 0.5 0.75 0.5 60 100/150 29 0.75 1 0.5 70 100/150 19 0.75 1 0.5 85 100/150 14 0.75 1 0.5 100 100/150 9 1 1.5 0.75 125 100/150 150 100/150 3 1 1.5 0.75

MaxL 45° 90° cond.Drain

Equivalentlengths(m)

MaxL 45° 90° cond.Drain

 6 1 1.5 0.75

StandardVercal ﬂuekit80/125Ø

Opons: 80/125Ø87°Elbow 532511124 80/125Ø45°Elbow 532511123

80/125Ø*1m 532511139



80/125Øcond.drain 532511162

StandardVercal ﬂuekit100/150Ø

Opons: 100/150Ø87°Elbow 532511118 100/150Ø45°Elbow 532511116

100/150Ø*1m 532511132

Figure C2.1.1 - Individual Flue equivalent lengths - refer to fig. C2.1

HHLPartno

562511081

HHLPartno

562511082

1100 min

300 min

114 0 m i n

1000

Figure C3.1 - Room sealed C53 twin duct flue system

HAMWORTHY HEATING LTD

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Model FluesizeØ

MaxL* 45° 90° cond.Drain 40 100 99 0.5 0.75 0.5 50 100 49 0.5 0.75 0.5 60 100 34 0.75 1 0.5 70 100 27 0.75 1 0.5 85 100 19 1 1.5 0.5 100 100 14 1.5 2 0.75

Equivalentlengths(m)

125 130

 99 3 4 0.75

150 130 74 3 4 0.75

L* = Air + Flue

700 min

StandardHorizontal ﬂuekit100Øtwin duct

HHLPartno

562511063

Opons: 100Ø87°Elbow 532511115 100Ø45°Elbow 532511114

100Ø*1m 532511130 100Ø*2m 532511131

Figure C3.1.1 - Individual Flue equivalent lengths - refer to fig. C3.1

580 min

930 min

(80/125)

(100 /150)

1350 (80/125)

1730 (1 00/150)

Figure C3.2 - Room sealed C53 twin duct flue system

Equivalentlengths(m)

Model FluesizeØ

L* = Air + Flue

1140 min.

StandardVercal ﬂuekit100Øtwin duct

HHLPartno

562511066

Opons: 100Ø87°Elbow 532511115 100Ø45°Elbow 532511114

100Ø*1m 532511130



100Ø*2m 532511131

Figure C3.2.1 - Individual Flue equivalent lengths - refer to fig. C3.2

HAMWORTHY HEATING LTD

FLEET H series

500001212/F

Page 63

1100 min

30mm/m fall to boiler

1040 min*

1000

Figure C4.1 - B23 Open flue system

Equivalentlengths(m)

Model FluesizeØ

MaxL 45° 90° cond.Drain 40 100 99 0.5 0.75 0.5 50 100 49 0.5 0.75 0.5 60 100 34 0.75 1 0.5 70 100 27 0.75 1 0.5 85 100 19 1 1.5 0.5 100 100 14 1.5 2 0.75 125

100 9 1.5 3 0.75

150 100 5 1.5 3 0.75

Figure C4.2- B23 Open flue system

ExtendedHorizontal ﬂuekit100Øtwin‐ duct

HHLPartno

562511059

Opons: 100Ø87°Elbow 532511115 100Ø45°Elbow 532511114 100Ø*1mstraight 532511130 100Ø*2mstraight 532511131

Figure C4.1.1 - Individual Flue equivalent lengths - refer to fig. C4.1

600 min

(100)

(130)

1730

1800

HAMWORTHY HEATING LTD

1140 min

FLEET H series

500001212/F

Page 64

Model FluesizeØ

MaxL 45° 90° cond.Drain 40 130 100 0.5 0.75 0.5 50 130 100 0.5 0.75 0.5 60 130 100 0.5 0.75 0.5 70 130 100 0.5 0.75 0.5 85 130 100 0.75 1 0.5 100 130 100 1 1.5 0.75 125 130 100 3 4 0.75 150 130 75 3 4 0.75

Equivalentlengths(m)

ExtendedVercal ﬂuekit100Øduct

HHLPartno

562511055

Opons: 100Ø87°Elbow 532511115 100Ø45°Elbow 532511114 100Ø*1mstraight 532511130 100Ø*2mstraight 532511131

Figure C4.2.1 - Individual Flue equivalent lengths - refer to fig. C4.2

300

225

400 min.

750 crs

Figure C5.1 - Cascade flue system 200mm Ø

FlueHeader FlueHeader LoadkW Sizemm

Equivalentlengths(m)

MaxL 45° 90°

80 200 100 3 4 100 200 100 3 4 150 200 100 3 4 200 200 100 3 4 250 200 100 3 4 300 200 100 3 4 400 200 50 3 500 200 25 3 4

    

500 250 100 4 5 600 250 30 4 5

1040 min

Note: Horizontal discharge is only suitable for gross inputs less than 150kW

Cascadeﬂuekit

40‐150kW

HHLPartno

562511084

Opons: 200Ø87°Elbow 532511166 200Ø45°Elbow 532511167 200Ø*1mstraight 532511136 200Øcascadeext.kit 562511085

4

200Øelbow&brkt 562511023 200Øroofterminal 532511146 200/250ØExpander 532511168 250Ø87°Elbow 532511169 250Ø*1mstraight 532511137 250Øroofterminal NotHHLsupply

HAMWORTHY HEATING LTD

Figure C5.1.1 - Cascade Flue equivalent lengths - refer to fig. C5.1 & C5.2

FLEET H series

500001212/F

Page 65

AccessoryDescripon

HHLPartno

Flatroofﬂashing 

125Ø 532511173 150Ø 532511174 200Ø 532511175 220Ø 532511176

225300

750 crs

Pitchedroofﬂashing 

125Øuniversal(25‐45°) 532511177 150Øuniversal(25‐45°) 532511178

1040 min.

200Ø(23‐27°) 532511179 200Ø(33‐47°) 532511180 200Ø(48‐52°) 532511181

Fixingbrackets 

100Ø 532511017

400 min.

125Ø 532511016 130Ø 532511184 150Ø 532511033

Figure C5.2 - Cascade flue system 200mm Ø

200Ø

Figure C6 - Flue Accessories

532511186

NOTE : For all B23 flue installations, the HHL supplied air inlet filter (Pt. No. 532812008) MUST be fitted

Air inlet

B23 Air Filte

B23 air inlet filter installed

Rear view Side view

In the instance that a B53 flue (ducted air inlet) is connected to a cascade (B23 outlet), the air inlet filters need not be fitted and therefore can be discarded.

Concentric Flue - Cuttable extension pieces

When cutting a concentric flue extension piece, care must be taken to ensure that the inner section is always cut 10mm longer than the outer section to allow sections to be joined correctly.

Do not cut all the way through both sections at the same length. Cut the outer section first and then the inner section 10mm longer.

HAMWORTHY HEATING LTD

FLEET H series

500001212/F

Page 66

APPENDIX D - VENTILATION

D1.1 Air Supply

Detailed recommendations for air supply are given in BS 6644 and BS5440 Pt 2. The following notes are intended to give general guidance. In all cases there must be provision for an adequate supply of air for both combustion and general ventilation, in addition to that required for any other appliance. Note: For Open flue applications, combustion air for the boiler is drawn through the top of the boiler casing. The air inlets must be kept open and free from blockage at all times.

D1.2.1 Air Supply by Natural Ventilation - Open Flue applications

The boiler room must have, or be provided with, permanent air vents directly to the outside air, at high level and at low level. For an exposed boiler house, air vents should be fitted, preferably on all four sides, but at the least on two sides. Air vents should have negligible resistance and must not be sited in any position where they are likely to be easily blocked or flooded or in any position adjacent to an extraction system which is carrying flammable vapour. Grilles or louvres must be so designed that high velocity air streams do not occur within the space housing the boiler.

Boiler house ventilation

Low level (inlet) - 4cm² per kW of total rated input (Net) High level (output) - 2cm² per kW of total rated input (Net)

Compartment ventilation

Where the boiler is to be installed in a cupboard or compartment, permanent high and low level ventilation is required which must communicate direct to outside, for cooling purposes.

Low level (inlet) - 10cm² per kW of total rated input (Net)

High level (output) - 5cm² per kW of total rated input (Net)

D1.2.2 Air Supply by Natural Ventilation - Room Sealed Installations

Where the boiler(s) are to be installed in a boiler room or internal space, the room or internal space must have permanent air vents directly to the outside air, at high level and at low level with the general requirements detailed above on location and construction.

Boiler house ventilation

Low level (inlet) - 2cm² per kW of total rated input (Net)

High level (output) - 2cm² per kW of total rated input (Net)

Compartment ventilation

Where the boiler is to be installed in a cupboard or compartment, permanent high and low level ventilation is required which may communicate to an adjoining room or outside, for cooling purposes.

Ventilation to a room or internal space - 10cm² per kW of total rated input (Net) Ventilation direct to outside - 5cm² per kW of total rated input (Net)

D1.3 Air Supply by Mechanical Ventilation

Air supplied to the boiler room by Mechanical means should be as follows:

1) Mechanical ventilation must be interlocked with the boilers to prevent operation in the event of ventilation fan failure

2) Mechanical inlet and mechanical extract can be utilised providing the design extraction rate does not exceed one third of the design inlet rate.

3) Mechanical extract ventilation with natural inlet ventilation MUST NOT be used.



For Mechanical ventilation systems an automatic control should be provided to cut off the gas supply to the boiler, in the event of failure of air flow in either inlet or extract fans.

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D 1.4. Boiler House Temperatures

The air supplied for boiler house ventilation shall be such that the maximum temperatures within the boiler house shall be as follows:

At floor level (or 100mm above floor level) = 25°C.

At mid-level (1.5m above floor level) = 32°C.

At ceiling level (or 100mm below ceiling level) = 40°C.

D 1.5. General Requirements

The air supply should be free from contamination such as building dust and insulation fibres from lagging. To avoid unnecessary cleaning and servicing of the boiler modules, the boilers should not be fired whilst building work is being undertaken. High and low level ventilation grilles shall be positioned as high and as low as practicably possible. Low level grilles should be located within 1 metre of the floor for Natural Gas. High level grilles should be positioned within 15% of the boiler room height from the ceiling. High and low level grilles shall communicate with the same room or space where compartment ventilation is used. Where grilles communicate directly with outside air, they shall be positioned on the same wall.

Figure D1 Mechanical Ventilation Flow Rates

Flow rate per kW

total rated heat input (Net)

Inlet air

(Combustion

ventilation)

Difference between

Inlet & Extract air *

m³/h. m³/h.

Volume 2.6 1.35

Note * : Where the associated air extraction is also by means of a fan, this shall be selected such as not to cause a negative pressure to develop in the boiler house and to maintain the difference between inlet and extract flow rates shown above. The calculated extract flow rate is the actual inlet flow rate minus the appropriate figure in the table above.

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APPENDIX E - WATER DATA

WATER DATA

F40H

BOILER MODEL

F50H

F60H

F70H

Water connections (Flow & Return) - BSP R 1”

Maximum Water Pressure - bar g 6.0

Minimum Water Pressure - bar g

0.5 Water content (not including headers) - litres 4.0 4.0 5.0 5.0

Design Flow Rate @ 20°C T Rise - litre/s Waterside Pressure Loss @ 20°C T Rise - mbar Residual pump performance available - mbar

0.48 0.6 0.72 0.84 70 80 80 100

270 200 140 60

F85H

F100H

F125H

F150H

Water connections (Flow & Return) - BSP R 1” Rp 1¼”

Maximum Water Pressure - bar g 6.0

Minimum Water Pressure - bar g

0.5 Water content (not including headers) - litres 6.0 6.0 7.0 8.0

Design Flow Rate @ 20°C T Rise - litre/s Waterside Pressure Loss @ 20°C T Rise - mbar Residual pump performance available - mbar

E1.1 Water Circulation System

1.02 1.19 1.49 1.79 100 110 140 400 420 340 220 300

The Fleet boiler has a low water content and the requirements of minimum water flow are given in the above table. To ensure these minimum requirements are achieved each boiler is fitted with an integral pump for circulation through the boiler and primary circuit supplemented by an integral flow switch. Recommendations for the water circulation system are given in BS 6644 and CP 342.

The following details are of particular importance for the correct installation of the water circulation system:

1) In a combined central heating and hot water system the hot water storage vessel must be of the indirect cylinder or calorifier type. The hot water storage vessel should be insulated, preferably with not less than 75mm (3”) thick mineral fibre, or its thermal equivalent.

2) Circulating pipe work not forming part of the useful heating surface should be insulated to help prevent heat loss and possible freezing, particularly where pipes are run through roof spaces and ventilated cavities. Cisterns situated in areas which may be exposed to freezing conditions should also be insulated. Furthermore, insulation exposed to the weather should be rendered waterproof.

3) Drain valves must be located in accessible positions which permit the draining of the whole system, including the boiler and hot water storage vessel.

4) Each boiler module has flow and return connections as detailed in the table above. Multiple boilers should be connected by flow and return headers. Hamworthy strongly recommend that boilers are connected in a primary circuit configuration utilising a low loss header arrangement to enable secondary circuits to be connected to the header. Figure E1.1.1 on the following page show typical layouts.

5) Ideally, individual valves should be fitted to each module to enable isolation from the system,

E1.2 Pressure Relief Valve (Safety Valve)

however, the arrangement must comply with the requirements of BS 6644.

The most important single safety device fitted to a boiler is its safety valve. Each boiler module is provided with an integral safety valve terminating at the return pipe at the rear of the boiler. BS 6644 provides comprehensive information for the selection and location of safety valves and attention is drawn to the higher capacity requirements of safety valves for pressurised hot water systems.

E1.3 Altitude Gauge (Water Pressure Gauge)

Every boiler or group of boilers should be provided with an altitude gauge complete with isolating valve. See Figure E1.1.1 for typical position.

E1.4 Open Vent and Cold Feed Pipe.

Every boiler or group of boilers should have an open vent pipe and cold feed pipe installed between the boiler and the first water isolating valve. The minimum bore (mm) of these pipes per installation is shown in the table. The

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vent pipe must rise continually, any valve fitted between a boiler and the open vent pipe for maintenance purposes shall be of the 3 way type such that when closed to the vent pipe the boiler will be open to atmosphere. The vent pipe shall be protected against freezing where this might occur. See BS 6644 for detailed information on Open Vent and Cold Feed Pipes.

E1.5 Thermometer



A thermometer complete with pocket should be fitted in the pipe work to indicate water flow temperature. See Figure E1.1.1 for typical position.

E1.6 Drain Valves

Each boiler has a 15mm NB drain valve fitted in the boiler return, for draining the boiler only. The heating system in total should have drain valves as recommended by BS 6644. See Figure E1.1.1 for typical position.



E1.7 Circulating Pump

Each individual boiler is fitted with an integral circulating pump ensuring flow through the boiler and primary circuit. To ensure the correct flow through the boiler, there is a balancing valve fitted to the flow pipe within the boiler. This is factory set and must not be adjusted. One or more circulating pumps will be required to circulate water around the heating system. All pumps should be

sited to facilitate servicing. It is important that when Fleet boilers are used to replace boilers on an existing

system, the system design must be modified acknowledging the performance of the integral circulating pump.. It is also important that the existing system be flushed through twice to remove any loose matter which may have accumulated. To protect the boiler heat exchanger, it is strongly recommended that a dirt/air separator is fitted in the return to the boiler. If in any doubt regarding the cleanliness of the system, a coarse filter should be fitted in

E1.8 Minimum Water Flow Rates

Minimum water flow rates are shown in table at beginning of Appendix E. These flow rates should be maintained through the boiler at all times whilst the boiler is firing. To prevent the boiler firing in the event of poor or no flow, the boiler is fitted with an integral flow switch. Particular attention should be paid to the restriction of external flow circuits during periods of low heat demand. Each boiler module is fitted with a flow balancing valve on the return pipe within the unit. This valve may require adjustment to ensure the correct flow through the boiler - refer to commissioning instructions Section 7.7

E1.9 Waterside Pressure Drop

The waterside hydraulic resistance (Pressure drop) is given in table at beginning of Appendix E.

E1.10 Water Flow Controls

The Fleet boiler is fitted with an integral circulating pump, which will shut off circulation 5 minutes after the boiler has ceased firing. Any external mixing valve / shunt pump or similar controls MUST always ensure that the minimum water flow rate as given in table at beginning of Appendix E is maintained. As a precaution, the Fleet boiler is fitted with a flow switch. The flow switch is designed to operate such that the boiler will shut down if insufficient flow occurs.

E1.11 Frost Protection

Consideration should be given to fitting an optional outside air sensor, to provide the necessary frost protection.

E1.12 Unvented Systems

Refer to Figure E1.1.1 on opposite page for typical layout of an unvented (Pressurised) Hot Water System. For system design refer to BS 7074 Part 2. In order to correctly size a pressurisation unit for any heating system the following parameters are required.

1) Static height of highest component in system (metres)

2) System volume. If this is not known, a general rule of thumb of 10litres/kW of installed boiler power

can be used.

3) Maximum flow temperature (°C)

4) Maximum system hot working pressure, generally given in bar gauge.

From the parameters given, Hamworthy Heating can size the pressurisation unit and also the expansion vessel. Care must be taken in sizing expansion vessels to ensure maximum acceptance factors are not exceeded.

Normally manufacturers of vessels impose a limit of 0.5. This value must not be exceeded at any time during the operation of the boiler, this includes the over pressure condition should a safety valve lift.

Consideration should also be given to sizing of the safety valve(s) in the system. Refer to BS 6759: Part 1 for

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Figure E1.1 - Typical Piping Layouts

Expansion pipe

Feed pipe

Float valve

Feed & expansion tank

Drain

Safety valve

Module

Hamworthy Modular Boilers

Module

Drain valve

Valv e

Mains water

VENTED SYSTEM: Single pipe header

Mains water

Lockshield

valve

Lockshield

valve

Automatic Air Vent

Expansion

Lockshield

valve

Tem porary

fill line

vessel

Drain valve

Double check valve

Valv e

Pressure & Temperature gauges

Valv e

Circulation pump

(Sys tem)

Valv e

Pressure &

Module

Temperature gauges

Module

Drain

Safety valve

Module

Hamworthy Modular Boilers

Valve

Circulation pump

(System)

Valve

Drain valve

Automatic Air Vent

Heating load

Automatic Air Vent

Heating load

UNVENTED SYSTEM: Single pipe header

further information and to BS 6880: Part 1 for design considerations.

E 1.13 Minimum System Water Pressure

To comply with guidance note PM5 (Health and Safety Executive), the minimum pressure requirements at the boiler are given below as examples:-

1) Single installed boiler running at 82°C flow temperature. Minimum head required is not less than 2.0 metres or 0.2 bar.

2) Single installed boiler running at 90°C flow temperature. Minimum head required = 3.0 metres or 0.30 bar.

3) Modular boiler installation running at 82°C flow temperature and 11°C rise across system.

Minimum head required = 4.4 metres or 0.43 bar.

4) Modular boiler installation running at 82°C flow temperature and 15°C rise across system. Minimum head required = 6.5 metres or 0.64 bar.

Figure E1.4 Cold Feed and Vent Pipe Sizes

Boiler Output Feed mm Vent mm

60 - 150kW 25 32

150 - 300 kW 32 38

300 - 600 kW 38 50 >601 KW 50 65

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Head (m)

Model

F 40W

F 50W

F 60W

F 70W

7.6

6.8

6.0

Head (m)

4.4

3.6

2.0

1.2

0.4

2.8

Q m /h

Model

F 85W

F 100W

F 125W

max

1.0

2.0

3.0

4.0 5.0 6.0

Q m /h

Head (m)

1.0 2.0 3.0

4.0

Figure E1.7 - Integral pump performance curves

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Boiler

AAV

Dosing P ot

Drain

Note: - sec ondary circui t components are not suppl ied with the HHL pipe ki t.

Flow

Return

HHL optional frame and pipe kit with low loss header for single secondary circuit

Boiler

HHL optional frame and pipe kit with low loss header fro three secondary circuits

Boiler

Dosing Pot

AAV

Dirt/ Ai r Separator

Dosing P ot

Dirt/ Air Separator

AAV

Drain

Note: - sec ondary circui t components are not suppl ied with the HHL pipe kit.

Flow Flow

Flow Return

Return

Flow

Typical layout for primary circuit with low loss header

Boiler

Typical layout for primary circuit with plate heat exchanger separation of secondary circuits

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Return

Boiler

Drain

Dirt/ Air Separator

Dosi ng Pot

Drain

Dirt/ Ai r Separator

AAV

Drain

Flow

Pl ate Heat Ex changer

Return

Figure E2 - Typical Pipe Kit system connections

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APPENDIX F - CASCADE CONTROL & ADDITIONAL MIXING CIRCUIT

To Convert the boiler hydraulic diagram for cascade control & additional mixing circuit :

Before programming changes are made, ensure the boiler is set to standby mode.

Press and hold both up and down arrow keys for at least five seconds to enter advanced parameter list H90 displayed top right of HMI screen.

Use either up or down arrow key to scroll through the parameter list and stop at H552

Default value is 2

Figure. F1

Two options are available.

Option 1 - for use with the Merley sequence controller

To enable cascade control change the setting by using the + or – key and set value to 80.

Press mode button to store change and return to home screen.

Figure. F2

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Option 2 - for use with the QAA73 programmable room unit

To enable an additional mixing circuit with use of AGU 2.500, change the setting by using the + or – key and set value to 50.

Press mode button to store change and return to home screen

Figure. F3

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NOTES:

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USEFUL USER INFORMATION

INSTALLER SITE ADDRESS

BOILER TYPE BOILER SIZE(S) UNIT NO(S). SERIAL NO(S). FLUE

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Please complete the information on the Registration Card, cut out and return to Hamworthy Heating Ltd.

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Hamworthy Heating Accredited Agents

North West England (Sales & Service)

Gillies Modular Services 210-218 New Chester Road, Birkenhead, Merseyside L41 9BG tel: 0151 666 1030 fax: 0151 647 8101

Southern Ireland (Sales & Service)

HEVAC Limited Naas Road, Dublin 12, Ireland tel: 00 353 141 91919 fax: 00 353 145 84806

Northern Ireland (Sales & Service)

HVAC Supplies Limited Unit A6, Dargan Court, Dargan Crescent, Belfast BT3 9JP tel: 02890 747737

fax: 02890 741233

Scotland (Sales & Service)

McDowall Modular Services 2 Penston Road, Glasgow, Scotland G33 4AG tel: 0141 336 8795 fax: 0141 771 9635

North East England (Service)

Allison Heating Products 12 Sunnyside Lane, Cleadon Village, Sunderland SR6 7XB tel: 0191 536 8833

fax: 0191 536 9933

Hamworthy Heating Customer Service Centre

Sales

tel: 0845 450 2865

Technical Enquiries

tel: 0845 450 2865

Servicing

tel: 01202 662555

Spares

tel: 0845 450 2866

Customer Service Centre

Hamworthy Heating Limited, Fleets Corner, Poole, Dorset BH17 0HH

Telephone: 0845 450 2866 Fax: 01202 662522

Email: aftersales@hamworthy-heating.com Website: www.hamworthy-heating.com

Hamworthy reserves the right to make changes and improvements which may necessitate alteration to the specification without prior notice.

Hamworthy F40H, F50H, F60H, F70H, F85H Installation, Commissioning And Operating Instructions

Specifications and Main Features

Frequently Asked Questions

User Manual