Hamworthy Dorchester DR-LL water heater Operating instructions

Hamworthy
Brand
Hamworthy
Model
Dorchester DR-LL water heater
Category
Water heaters & boilers
Type
Operating instructions
DORCHESTER
DR-LL MODELS
HOT WATER
STORAGE HEATERS
Installation, Commissioning
and Maintenance Instructions
DORCHESTER MODELS: DR-LL 50-288, 70-344, 90-322
Open Flue, Direct Gas Fired Hot Water Storage Heaters with
Automatic Ignition for Domestic Hot Water Installations
NOTE:
THESE INSTRUCTIONS MUST BE READ AND UNDERSTOOD BEFORE
INSTALLING, COMMISSIONING, OPERATING OR SERVICING EQUIPMENT.
ND
THIS WATER HEATER IS FOR USE ON GROUP H NATURAL GAS (2 FAMILY) I .
2H
PLEASE ENSURE RELEVANT INFORMATION REQUIRED WITHIN DOCUMENT
IS FOUND RELATING TO GAS TO BE FIRED BEFORE FIRING HEATER.
THIS WATER HEATER COMPLIES WITH ALL RELEVANT EUROPEAN DIRECTIVES.
PUBLICATION NO. 500002707
ISSUE: “C”.
JANUARY 20210313399
Preface
Copyright
Copyright © 2020 Hamworthy Heating
All rights reserved.
Nothing from this publication may be copied, reproduced and/or published by means of
printing, photocopying or by whatsoever means, without the prior written approval of
Hamworthy Heating.
Hamworthy Heating reserves the right to modify specifications in this manual.
Trademarks
Brand names in this manual are registered trademarks of their respective owners.
Warranty
Refer to the appendix Warranty (see 11.7) for the warranty provisions.
Liability
User
Hamworthy accepts no liability when the water heater is not used correctly and requires
the user to:
•Read this manual carefully and obey the instructions.
•Ask your installation engineer for advise about the use of the water heater.
•Make sure that the service and maintenance activities are done by a qualified
engineer.
•Store the manual, in good condition, near the water heater.
Installation engineer
Hamworthy accepts no liability when the water heater is not used correctly and requires
the installation engineer to:
•Read this manual carefully and obey the instructions.
•Make sure that the entire water heater installation complies with the applicable
regulations (on page 4).
•Make sure that the water heater is tested before the installation is taken into use.
•Explain the correct use to the user.
•Notify the user when service and maintenance activities are necessary.
•Make sure that you hand over all applicable manuals.
0313399_DR-LL_UKUK_V1.3, 01-01-2021 3
Supplier
The DR-LL water heater is designed in accordance with the applicable regulations. The
water heater is delivered with the CE-marking and all necessary documentation to obey
these regulations. See the compliance section. (on page 4)
Hamworthy accepts no liability for claims from third parties when:
•The instructions for the correct installation of the water heater are not obeyed.
•The instructions for the correct use of the water heater are not obeyed.
•The water heater did not have maintenance on the correct maintenance interval.
For more information, refer to the General Terms of Sales. These are available on request,
free of charge.
We believe that this manual provides you with accurate and complete descriptions of all
relevant components. If you, nonetheless find errors or inaccuracies in this manual, please
inform Hamworthy. This helps us to further improve our documentation.
Compliance
To safely produce domestic hot water, the design and construction of the DR-LL water
heaters is in accordance with:
•the European Regulations 2016/426 on appliances burning gaseous fuels (GAD).
•the European Standard for Gas–fired storage water heaters for the production of
domestic hot water (EN89).
•The European ECO-Design Directive.
•The European Energy Labeling Directive
Refer to the appendix Declaration of conformity.
Regulations
Gas Safety (installations and Use) Regulations 1998 (as
amended).
It is law that all gas appliances are installed by competent persons, in accordance with the
above regulations. Failure to install appliances correctly could lead to prosecution. It is in
your own interest and that of safety, to ensure that this law is complied with.
The installation of the water heater MUST be in accordance with the relevant requirements
of the Gas Safety Regulations, Building Regulations, IEE Regulations and the Water Supply
(water fittings) Regulations. The installation should also be in accordance with any relevant
requirements of the HSE, local gas region and local authority and the relevant
recommendations of the following documents:
British and European Standards
•BS 6891:2015
Specification for the installation and maintenance of low pressure gas installation
pipework of up to 35 mm (R1¼) on premises.
•BS 6798: 2014
Specification for selection, installation, inspection, commisioning, servicing and
maintenance of gas-fired boilers of rated input not exceeding 70 kW net.
•BS 6644: 2011
Specification for installation and maintenance of gas-fired hot water boilers of rated
inputs between 70 kW (net) and 1.8 MW (net) (2nd and 3rd family gases).
•BS EN 806-1: 2000
Specification for installations inside buildings conveying water for human
consumption. General.
•BS EN 806-2: 2005
Specifications for installations inside buildings conveying water for human
consumption. Design.
•BS EN 806-3: 2006
Specifications for installations inside buildings conveying water for human
consumption. Pipe sizing. Simplified method.
4
•BS EN 806-4: 2010
Specifications for installations inside buildings conveying water for human
consumption. Installation.
•BS EN 806-5: 2012
Specifications for installations inside buildings conveying water for human
consumption. Operation and maintenance.
•BS 8558: 2015
Guide to design, installation, testing and maintenance of services suppling water to
domestic use within buildings and their curtilages. Complementary guidance to BE EN
806.
•BS 5546: 2010
Specification for installation and maintenance of gas-fired water-heating appliances
of rated input not exceeding 70 kW net.
•BS 5440-1: 2008
Flueing and ventilation for gas appliances of rated input not exceeding 70 kW net
(1st, 2nd and 3rd family gases). Specification for installation of gas appliances to
chimneys and for maintenance of chimneys.
•BS 5440-2: 2009
Flueing and ventilation for gas appliances of rated input not exceeding 70 kW net
(1st, 2nd and 3rd family gases). Specification for the installation and maintenance of
ventilation provision for gas appliances.
Institute of Gas Engineers and Managers (IGEM) Publications
•IGE/UP/1 Edition 3:
Strength testing, tightness testing and direct purging of industrial and commercial
gas installations.
•IGE/UP/1A:Edition 3:
Strength testing, tightness testing and direct purging of small low pressure industrial
and commercial natural gas installations.
•IGE/UP/2: Edition 3:
Installation pipework on industrial and commercial premises.
•IGE/UP/10 Edition 4:
Installation of flued gas appliances in industrial and commercial premises.
CIBSE Publications
•Guide G Aug 2014:
Public Health & Plumbing Engineering
Contact information
In the event of problems with your gas, electricity or water supply connections or when
you have any comments or questions, please contact your supplier.
0313399_DR-LL_UKUK_V1.3, 01-01-2021 5
6
About this manual
Scope
This manual gives information about safe and correct use of the water heater and how
installation, maintenance and service activities have to be done correctly. You must obey
the instructions in this manual.
Caution
Read this manual carefully before you start the water heater. It can cause personal injury
and damage to the water heater when you do not read the manual and/or do not obey
the instructions.
The purpose of this manual is to:
•describe the working principles and layout of the water heater
•explain the safety devices
•highlight possible hazards
•describe the use of the water heater
•describe the installation, service and maintenance of the water heater
This manual has two parts:
•An User part that describes the correct usage of the water heater.
•An Installation, Maintenance and Service part, that describes the correct installation
and maintenance procedures.
Target group
The information in this manual applies to three target groups:
•users
•installation engineers
•service and maintenance engineers
The User part is intended for the (end) users. The Installation, Maintenance and Service
part is intended for the installation engineers and the service and maintenance engineers.
Notation conventions
This manual uses the following text conventions:
•Numbers between parentheses e.g. (1), refer to elements in a figure that are
described by the text.
•Cross-references to sections, tables, figures etc. are underlined and written as (see
"..."). In the digital version, the cross-references function as hyperlinks that can be
used to navigate through the manual by clicking on them. Example: Safety (see 2).
This manual contains the following text styles/symbols for situations that may endanger
users/engineers, cause damage to equipment or need special attention:
Note
A note gives more information on a topic.
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0313399_DR-LL_UKUK_V1.3, 01-01-2021 7
Caution
Obey the caution instructions to prevent damage of the water heater.
Warning
Obey the warning instructions to prevent danger of personal injury, and serious damage
to the water heater.
Document identification
Article number Language Version
0313399 EN 1.2
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8
Table of Contents
Preface........................................................................................ 3
Copyright.......................................................................... 3
Trademarks....................................................................... 3
Warranty...........................................................................3
Liability.............................................................................3
Compliance....................................................................... 4
Regulations....................................................................... 4
Contact information............................................................ 5
About this manual....................................................................... 7
Scope............................................................................... 7
Target group......................................................................7
Notation conventions.......................................................... 7
Document identification.......................................................8
User part.................................................................. 13
1 Introduction.............................................................................. 15
2 Safety........................................................................................17
3 Interface................................................................................... 19
3.1 Operator interface............................................................ 19
3.1.1 Control Switch..................................................................19
3.1.2 Temperature control knob.................................................. 19
3.1.3 LCD display..................................................................... 20
3.2 Status of the water heater................................................. 20
3.2.1 Operating modes.............................................................. 20
3.2.2 Error conditions................................................................21
4 Use............................................................................................ 23
4.1 Turn on the water heater................................................... 23
4.1.1 Switch to ON mode........................................................... 23
4.1.2 Set the water temperature.................................................23
0313399_DR-LL_UKUK_V1.3, 01-01-2021 9
4.2 Turn off the water heater................................................... 23
4.2.1 Turn off for a short period.................................................. 23
4.2.2 Isolate from the mains...................................................... 23
4.2.3 Turn off for a long period................................................... 24
Installation, Maintenance and Service part.............. 25
5 Introduction.............................................................................. 27
5.1 About the water heater..................................................... 27
5.2 Working principle..............................................................27
6 Safety........................................................................................29
6.1 Safety instructions............................................................29
6.2 Instructions on the water heater.........................................30
6.3 Safety devices..................................................................31
6.4 Environmental aspects...................................................... 33
6.4.1 Recycling.........................................................................33
6.4.2 Disposal.......................................................................... 33
7 Water heater............................................................................. 35
7.1 Structure of the water heater............................................. 35
8 Installation............................................................................... 37
8.1 Packaging........................................................................37
8.2 Conditions....................................................................... 37
8.2.1 Ambient conditions........................................................... 37
8.2.2 Maximum floor load.......................................................... 37
8.2.3 Water composition............................................................ 38
8.2.4 Working clearances...........................................................38
8.3 Installation diagram..........................................................39
8.4 Water connections............................................................ 39
8.4.1 Cold water connection....................................................... 39
8.4.2 Hot water connection........................................................ 39
8.4.3 Circulation connection....................................................... 40
8.4.4 Drain valve...................................................................... 40
8.5 Gas connection.................................................................40
8.6 Flue gas discharge............................................................ 41
8.6.1 Draught diverter...............................................................41
8.6.2 T.R.S. (Thermal Reflux Safeguard)...................................... 42
8.6.3 Discharge pipe................................................................. 42
8.7 Electrical connections........................................................ 42
10
8.7.1 Preparation......................................................................43
8.7.2 Mains power.................................................................... 44
8.7.3 Additional error signal (optional).........................................45
8.7.4 Finalization...................................................................... 45
8.8 Commissioning.................................................................45
8.8.1 Filling..............................................................................45
8.8.2 Gas supply pressure..........................................................46
8.8.3 Burner pressure............................................................... 46
8.8.4 Air pressure differential..................................................... 47
8.8.5 Turn on the water heater................................................... 48
8.9 Decommisioning...............................................................48
8.9.1 Turn off the water heater................................................... 48
8.9.2 Draining.......................................................................... 48
9 Maintenance.............................................................................. 49
9.1 Performance check........................................................... 49
9.2 Preparation......................................................................50
9.3 Water-side maintenance.................................................... 50
9.3.1 Inspect the anode.............................................................50
9.3.2 Inspect the inlet security group.......................................... 51
9.3.3 Descale the tank.............................................................. 51
9.4 Gas-side maintenance....................................................... 52
9.4.1 Clean the burner.............................................................. 52
9.4.2 Check the pilot burner.......................................................54
9.4.3 Clean the combustion chamber...........................................54
9.4.4 Assemble the burner.........................................................54
9.5 Finalization...................................................................... 54
10 Troubleshooting........................................................................ 55
10.1 Errors and warnings..........................................................55
10.1.1 General errors..................................................................55
10.1.2 Displayed errors............................................................... 56
11 Appendices................................................................................63
11.1 Technical details............................................................... 63
11.2 Dimensions......................................................................64
11.3 Gas details...................................................................... 67
11.4 Energy labeling................................................................ 68
11.5 Electrical wiring diagram....................................................69
11.6 Declaration of conformity...................................................71
11.7 Warranty......................................................................... 72
0313399_DR-LL_UKUK_V1.3, 01-01-2021 11
Index........................................................................................ 73
12
User part
0313399_DR-LL_UKUK_V1.3, 01-01-2021 13
14
1 Introduction
The DR-LL water heater stores and heats water for sanitary purposes.
Cold water enters the bottom of the tank through the water inlet (1). The heated water
leaves the tank at the top through the hot water outlet (2). To operate the water heater,
the operator interface (3) and control switch (4) are used.
Fig. DR-LL water heater
4
3
2
1
1. Water inlet
2. Water outlet
3. Operator interface
4. Control switch
0313399_DR-LL_UKUK_V1.3, 01-01-2021 15
16 User part
2 Safety
Hamworthy cannot be held responsible for damages or injuries which can be lead back to:
•Failure to follow the instructions provided in this manual.
•Carelessness during use or maintenance of the water heater
.
Every user must study the user part of this manual and must follow the instructions in this
part of the manual strictly. Do not change the sequence of the described actions. This
manual must be available for the user and service engineer at all times.
Warning
If you smell gas:
•Shut off the mains gas supply valve!
•Avoid causing sparks! Do not use any electrical equipment or
switch, i.e. no telephones, plugs or bells!
•No naked flames! No smoking!
•Open windows and doors!
•Warn occupants and leave the building!
•After leaving the building, alert the gas distribution company or
your installation engineer.
w
Caution
Do not store or use chemical substances in the room where the water heater is installed
because of the risk of explosion and corrosion of the water heater
. Some propellants,
bleaching agents and degreasing agents etc. disperse of explosive vapors and/or cause
accelerated corrosion. If the water heater is used in a room where such substances are
stored or used, the warranty will be void.
Caution
Installation, maintenance and service may only by carried out by a qualified engineer
.
Caution
The water heater is not intended for use by persons (incl. children under the age of 16)
with reduced physical, sensory or mental capacities, or who lack the necessary
experience or knowledge. When the person responsible for their safety is supervising or
has explained how the water heater should be used, these persons can use the water
heater.
Caution
This water heater is not intended to be used by children under the age of 16. Always
supervise children, and make sure that they do not play with the water heater.
Note
Regular maintenance extends the service life of the water heater. To determine the
correct service interval, the service and maintenance engineer must do a check on both
the water and gas side of the water heater three months after installation. Based on this
check, the best service interval can be determined.
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0313399_DR-LL_UKUK_V1.3, 01-01-2021 17
18 User part
3 Interface
3.1 Operator interface
The operator interface consists of:
•a control switch (see 3.1.1) on the left side of the water heater.
•a temperature control knob (see 3.1.2) on the front of the water heater.
•a LCD display (see 3.1.3) to view the status of the water heater and to view errors.
Fig. Operator interface
2
1
1. LCD display
2. Temperature control
knob
3.1.1 Control Switch
With the control switch you can turn the water heater on I or off 0.
Warning
The power of the water heater stays on when the control switch is set to 0.
3.1.2 Temperature control knob
With the temperature control knob you can set the desired water temperature (see 4.1.2)
of the water heater.
When the water heater is switched on, you can use the temperature control knob to set
the water heater in the OFF mode or in the ON mode:
•Turn the temperature control knob clockwise to ignite the main burner (ON mode).
•Turn the temperature control knob anticlockwise to shutdown the main burner (OFF
mode).
•Turn the temperature control knob completely anticlockwise to reset the water
heater.
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0313399_DR-LL_UKUK_V1.3, 01-01-2021 19
3.1.3 LCD display
The LCD display shows 3 different symbols at the bottom side of the display and 4
characters in the center of the display. The characters represent a temperature or an error
code.
Fig. LCD display
1
2
1. Characters
2. Symbols
3.1.3.1 Symbols on the display
The symbols on the display give visual information about the status of the water heater.
Symbol Explanation
Heat demand present
Water heater in operation
Display shows a temperature
3.2 Status of the water heater
During operation, the display shows the status of the water heater.
3.2.1 Operating modes
The DR-LL has 2 operating modes:
•OFF mode (see 3.2.1.1)
•ON mode (see 3.2.1.2)
3.2.1.1 OFF mode
In the OFF mode the water heater is de-activated. The temperature control knob is set at
the frost symbol between reset and 40 ºC. The pilot flame is activated.
In the OFF mode the water heater is de-activated. The display shows the characters OFF.
Fig. OFF mode display Fig. Frost protection is activated
To prevent that the water in the water heater freezes, the frost protection is activated
when the water heater is in OFF mode. The frost protection starts when the temperature
of the water drops below 5°C. The display shows the characters Fr followed by the actual
temperature. The water heater will heat the water to 20°C and then turns back to OFF
mode.
20 User part
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Hamworthy Dorchester DR-LL water heater Operating instructions

Hamworthy
Brand
Hamworthy
Model
Dorchester DR-LL water heater
Category
Water heaters & boilers
Type
Operating instructions
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