Installation commissioning and maintenance instructions

EcoCharger Hybrid
Gas Fired Condensing
Water Heater with
Intergrated Coil
Installation, Commissioning,
User & Maintenance Instructions
LV311746 | September 2017
0311746 R2.1 / 3717 - Changes Reserved
Models:
HWHC 44-370 G CE and PG CE
HWHC 63-370 G CE and PG CE
!
IMPORTANT INFORMATION
These instructions must be read and understood before installing, commissioning, operating
or maintaining the equipment.
Preface
Copyright
Copyright © 2016 Lochinvar Ltd.
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
Lochinvar Ltd..
Lochinvar Ltd. 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 section 12.9) for the warranty provisions.
Liability
Lochinvar accepts no liability for claims from third parties caused by:
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unauthorized use
use other than stated in this manual
use other than in accordance with the General Conditions registered at the Chamber
of Commerce.
For more information, refer to the General Conditions. 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 Lochinvar. This helps us to further improve our documentation.
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Compliance
To safely produce domestic hot water, the design and construction of the HWHC water
heaters is in accordance with:
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the European Gas Appliance Directive (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
It is law that all gas appliances are installed by competent persons, in accordance with The
Gas Safety (Installation and Use) Regulations 1998. 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 equipment MUST be in accordance with the
relevant requirements of the Gas Safety Regulations, Building Regulations, I.E.E.
Regulations and the bylaws of the local water undertaking. The installation should also be
in accordance with any relevant requirements of the local gas distributor and local
authority.
In addition the installation should follow the relevant guidance offered in the following
documents. It is not practical to list all relevant information but emphasis is placed on the
following documents, as failure to comply with the guidance given will almost certainly
result in an unsatisfactory installation:
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•
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•
4
BS EN 1858: 2008 + A1: 2011
Chimneys. Components. Concrete flue blocks.
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
Installation and maintenance of flues and ventilation for gas appliances of rated input
not exceeding 70 kW net (1st, 2nd and 3rd family gases). Specification for
installation and maintenance of ventilation for gas appliances.
BS 6644: 2011
Specification for Installation of gas-fired hot water boilers of rated inputs between 70
kW (net) and 1.8 MW (net) (2nd and 3rd family gases).
BS 6700: 2006 +A1: 2009
Design, installation, testing and maintenance of services supplying water for
domestic use within buildings and their curtilages.
BS 6880: 1988 Parts 1, 2 and 3
Code of practice for low temperature hot water systems of output greater than 45
kW.
BS 7074: 1989 Parts 1 and 2
Application, selection and installation of expansion vessels and ancillary equipment
for sealed systems.
BS 7671: 2008 + A1: 2011
Requirements for electrical installations, I.E.E. wiring regulations seventeenth
edition.
BS 7671: Amendment 2: August 2013
CP 342 (Part 2 1974):
Code of practice for centralised hot water supply-buildings other than dwellings.
Institute of Gas Engineers and Managers (IGEM) Publications
•
•
•
•
IGE/UP/1 - Edition 2:
Installation pipework on industrial and commercial premises.
IGE/UP/2:
Gas installation pipework, boosters and compressors on industrial and commercial
premises.
IGE/UP/4 - Edition 3:
Commissioning of gas-fired plant on industrial and commercial premises.
IGE/UP/10 - Edition 3:
Installation of flued gas appliances in industrial and commercial premises.
Gas Safety (Installation and Use) Regulations 1998
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CIBSE: Guides
Part A Environmental Design
Part G Public health engineering
H.S.E. guidance
INDG 436 Safe management of industrial steam & hot water boilers
SAFED BG01Guidance on safe operation of boilers
Third edition of the 1956 Clean Air Act Memorandum on Chimney Heights
Note
Manufacturer's notes must not be taken in any way as overriding statutory obligations.
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.
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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.
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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:
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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:
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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:
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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:
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•
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•
Numbers between parentheses e.g. (1), refer to elements in a figure that are
described by the text.
Texts displayed on the user interface always are shown similar to the characters in
the display, for example WEEK PROGRAM, SETTINGS.
Buttons are always shown between brackets, for example: [ ], [ENTER], [RESET].
Cross-references to sections, tables, figures etc. are underlined and written as (see
section "..."). 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 section 2).
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This manual contains the following text styles/symbols for situations that may endanger
users/engineers, cause damage to equipment or need special attention:
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Note
A note gives more information on a topic.
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
8
Article number
Language
Version
0311746
EN
2.0
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
3.2
Explanation of icons.......................................................... 19
3.3
Control switch.................................................................. 20
3.4
Buttons........................................................................... 20
3.5
PC connection.................................................................. 21
3.6
Status of the water heater................................................. 21
3.6.1
Operating modes.............................................................. 21
3.6.2
Error conditions................................................................22
3.6.3
Service conditions.............................................................23
3.6.4
Anode warning................................................................. 23
3.6.5
Q/T Sensor warning.......................................................... 23
3.6.6
Collector temperature warning........................................... 23
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4
Use............................................................................................ 25
4.1
Turn on the water heater................................................... 25
4.1.1
The appliance's heating cycle............................................. 25
4.2
Turn off the water heater...................................................27
4.2.1
Turn off for a short period..................................................27
4.2.2
Isolate from the mains...................................................... 27
4.2.3
Turn off for a long period................................................... 28
4.3
Main menu...................................................................... 28
4.3.1
Notation conventions for menu-related instructions............... 29
4.3.2
Switching to ON mode.......................................................29
4.3.3
Setting the water temperature........................................... 29
4.3.4
Week program................................................................. 30
4.3.5
Starting and stopping the week program............................. 30
4.3.6
Changing the appliance's standard week program................. 30
4.3.7
Adding times to a week program........................................ 33
4.3.8
Deleting times from a week program...................................34
4.3.9
Extra period.....................................................................35
4.3.10 Settings.......................................................................... 37
Installation, Maintenance and Service part.............. 41
5
6
7
Introduction.............................................................................. 43
5.1
About the water heater..................................................... 43
5.2
The appliance's heating cycle............................................. 43
5.3
Working principle..............................................................43
5.4
Operating cycle................................................................ 45
Safety........................................................................................47
6.1
Safety instructions............................................................47
6.2
Instructions on the water heater.........................................48
6.3
Safety devices..................................................................49
6.3.1
Protection for the water heater........................................... 49
6.3.2
Safety of the installation....................................................50
6.3.3
Protection for the solar heating system................................50
6.3.4
Safety of the solar heating system...................................... 51
6.4
Environmental aspects...................................................... 51
6.4.1
Recycling.........................................................................51
6.4.2
Disposal.......................................................................... 52
Installation............................................................................... 53
7.1
10
Packaging........................................................................53
7.2
Conditions....................................................................... 53
7.2.1
Ambient conditions........................................................... 53
7.2.2
Maximum floor load.......................................................... 53
7.2.3
Water composition............................................................54
7.2.4
Working clearances...........................................................54
7.3
Installation diagram.......................................................... 55
7.4
Water connections............................................................ 56
7.4.1
Unvented water connections.............................................. 56
7.4.2
Vented water connections.................................................. 57
7.5
Gas connection.................................................................58
7.6
Solar heating system........................................................ 58
7.7
Venting system................................................................ 58
7.7.1
C13/C33 concentric systems.............................................. 61
7.7.2
C13/C33 parallel systems.................................................. 62
7.7.3
C43/C53/C63 systems.......................................................64
7.8
Electrical connections........................................................ 65
7.8.1
Preparation......................................................................65
7.8.2
Mains power.................................................................... 66
7.8.3
Optional electrical connections............................................66
7.8.4
Electrical connection of the solar heating system...................67
7.9
Commissioning.................................................................69
7.9.1
Filling..............................................................................69
7.9.2
Procedure for checking the supply pressure..........................71
7.9.3
Procedure for checking the gas control valve pressure........... 73
7.9.4
CO2 adjustment............................................................... 74
7.9.5
Switching pressure measurement....................................... 76
7.9.6
Turn on the water heater................................................... 77
7.10
Decommisioning............................................................... 77
7.10.1 Turn off the water heater...................................................77
7.10.2 Draining.......................................................................... 77
8
Conversion of gas type.............................................................. 79
9
Settings..................................................................................... 81
9.1
Operator interface............................................................ 81
9.2
Service program...............................................................81
9.2.1
Hysteresis....................................................................... 82
9.2.2
Display the error history.................................................... 82
9.2.3
Display the water heater history......................................... 82
9.2.4
Display the selected water heater....................................... 83
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9.2.5
Switch the pump on or off................................................. 83
9.2.6
Setting the service interval................................................ 83
9.2.7
Service mode...................................................................83
9.2.8
Setting legionella prevention.............................................. 84
9.2.9
Solar heating system configuration..................................... 85
9.2.10 Setting the central heating configuration..............................87
10
Maintenance.............................................................................. 89
10.1
Preparation......................................................................89
10.2
Water-side maintenance.................................................... 90
10.2.1 Descale the tank.............................................................. 90
10.2.2 Clean the condensate drain................................................91
10.3
Gas-side maintenance....................................................... 91
10.3.1 Clean the burner.............................................................. 91
10.3.2 Clean the heat exchanger.................................................. 91
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10.4
Solar collector maintenance............................................... 92
10.5
Finalization...................................................................... 92
Troubleshooting........................................................................ 93
11.1
Errors and warnings..........................................................93
11.1.1 General errors..................................................................94
11.1.2 Displayed errors............................................................... 95
11.1.3 Warnings....................................................................... 100
12
Appendices.............................................................................. 103
12.1
Technical details............................................................. 103
12.2
Dimensions.................................................................... 105
12.3
Gas details.....................................................................107
12.4
Week program card.........................................................108
12.5
Electrical wiring diagram.................................................. 110
12.6
Electrical wiring diagram solar heating system.................... 112
12.7
Menu structure............................................................... 113
12.8
Declaration of conformity................................................. 114
12.9
Warranty....................................................................... 115
12.10
Detailed installation diagram............................................ 117
Index...................................................................................... 119
12
User part
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1
Introduction
The HWHC 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. HWHC water heater
2
3
1.
Water inlet
2.
Water outlet
3.
Operator interface
4.
Control switch
4
1
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User part
2
Safety
Lochinvar cannot be held responsible for damages or injuries leading back to:
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•
Failure to follow the instructions provided in this manual.
Carelessness during use or maintenance of the water heater.
Every user has to study the user part of this manual and has to follow the instructions in
this part of the manual strictly. Do not change the sequence of the actions to be done.
This manual has to be available for the user and service engineer all the time.
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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.
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 with reduced physical, sensory or
mental capacities, or who lack the necessary experience or knowledge. When the person
responsible for their safety is supervising them or has explained to them 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. Always supervise children, and
make sure that they do not play with the water heater.
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Note
Regular maintenance extends the service life of the water heater. To determine the
correct service interval, the service and maintenance engineer has to 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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User part
3
Interface
3.1
Operator interface
The operator interface is completely menu-driven, and comprises:
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•
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a
6
6
a
a
4-line display with 20 characters per line;
buttons for controlling the water heater (below the display);
graphical symbols (above the display);
connector for a service PC;
control switch.
The buttons are divided into three groups:
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Navigation buttons:
Buttons for UP [ ], and DOWN [ ];
Enter: [ENTER].
Reset button: [RESET].
The main menu (see section 4.3): [
];
The service program: [
].
This chapter is specifically intended for the service and maintenance engineer and
installation engineer.
In this manual, the display of the operator interface is shown as in the figure, both with
and without icons.
3.2
Explanation of icons
The table explains the meanings of the icons.
Name
Explanation
Heat demand
Heat demand detected
Purge
Pre- and post-purge using fan
Pressure switch
Pressure switch is closed
Glow
(Pre)glow
Gas control valve
Gas control valve open/ignition
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3.3
Name
Explanation
Flame detection
Water heater operational
Solar heating system
Solar energy is heating the water
Control switch
The control switch of the controller turns the water heater ON and OFF. Note that in the
OFF position the water heater remains electrically live, in order for the continuous pump
to stay running.
After switching on, the text INTERNAL CHECK appears on the display for about 10
seconds. The main menu (see section 4.3) then appears. If no selection is made in the
main menu, the water heater automatically switches to the OFF mode (see section 3.6.1).
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3.4
Note
To electrically isolate the water heater, you must use the isolator between the water
heater and the mains power supply.
Buttons
The use of these buttons is explained with the help of the figure showing the main menu
(see section 4.3).
The buttons are:
•
•
•
Buttons for UP [ ], and DOWN [ ];
Enter: [ENTER];
Reset button: [RESET].
The arrows
scroll.
and
indicate that you can scroll up and/or down. Use [ ] and [ ] to
The cursor ® points to the option to be activated. In the display as shown in the figure,
you can scroll through the main menu.
The main menu comprises: OFF, ON, WEEK PROGRAM, EXTRA PERIOD and
SETTINGS. You have to scroll down further to see the options EXTRA PERIOD and
SETTINGS.
The selected option is confirmed using [ENTER].
Pressing [RESET] takes you back one page in a menu and discards all options selected in
the current menu.
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Note
[RESET] is also used to reset the water heater following an error.
User part
3.5
PC connection
The PC connection is exclusively intended to enable technicians from Lochinvar to read the
status and history of the water heater. These details can be important for troubleshooting
and/or resolving complaints.
3.6
Status of the water heater
During operation, the display shows the status of the water heater.
3.6.1
Operating modes
When running, the water heater has four basic operating modes, namely:
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3.6.1.1
OFF (see section 3.6.1.1)
ON (see section 3.6.1.2)
EXTRA (see section 3.6.1.3)
PROG (see section 3.6.1.4)
OFF
In this mode, the frost protection is activated. The figure shows the display with the
following information:
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•
•
3.6.1.2
line one: the text OFF;
line two: the time, the day and T1 (see section 4.1.1).
lines three and four: the text FROST PROTECTION ACTIVATED.
ON
In this mode, the water heater continually responds to the hot water demand. The figure
shows the display with the following information:
•
•
•
•
3.6.1.3
line one: the text ON;
line two: the time, the day and T1 (see section 4.1.1).
line three: the programmed water temperature Tset;
line four: is empty when the water heater is idle, or depending on the operating cycle
(see section 4.1.1), displays a text such as HEAT DEMAND.
EXTRA
In this mode, one extra period is programmed and activated. In this mode, the OFF or
PROG mode is temporarily overruled to fulfill a single period of demand. When the period
has passed, the water heater automatically returns to the previous operating mode.
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The figure shows the display with the following information:
3.6.1.4
•
•
line one: the text EXTRA;
line two: the time, the day and T1 (see section 4.1.1);
•
•
line three: the switch-on time and the related water temperature setting;
line four: the text PERIOD ACTIVATED.
PROG
In this mode a preset week program is active, and the water heater responds continually
to demand within the time periods set in the week program. There are two distinct
situations possible in this mode:
1.
2.
The
The
-
current time falls within a set time period of the week program.
figure shows the display with the following information:
line one: the text PROG;
line two: the time, the day and T1 (see section 4.1.1);
-
line three: the next scheduled switch-off time and the water temperature Tset
-
of the active period;
line four: is empty, or depending on the operating cycle (see section 4.1.1),
displays a text such as HEAT DEMAND.
The
The
-
current time falls outside a set time period of the week program.
figure shows the display with the following information:
line one: the text PROG;
line two: the time, the day and T1 (see section 4.1.1);
line three: the next scheduled switch-on time;
line four: displays the text PERIOD ACTIVATED.
In all modes, the temperature may at any moment drop below the desired temperature.
The water heater then enters an operating cycle. This operating cycle (see section 4.1.1)is
identical for all basic operating modes.
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3.6.2
Note
Setting and if necessary programming of the basic operating modes are described in the
main menu chapter (see section 4.3).
Error conditions
The figure shows an example of an error condition. If the water heater enters this
condition, the display will show the following information:
•
•
22
line one: error code comprising a letter and two digits, followed by the error
description;
lines two to four: alternately, a brief explanation of the error, and a brief action to
resolve the error.
User part
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3.6.3
Note
When the display shows an error code, try to reset the water heater with [RESET].
Contact your service and maintenance engineer or supplier when the water heater does
not restart or when the display shows the error code again.
Service conditions
The figure shows the message SERVICE REQUIRED. If this message appears, the water
heater needs a service and maintenance inspection. In this case, contact your service and
maintenance engineer.
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3.6.4
Note
Regular maintenance extends the service life of the water heater.
Note
The message SERVICE REQUIRED is based on the number of expired burning hours and
the preset service interval. If the service interval has been incorrectly selected, contact
the service and maintenance engineer for instructions on how to rectify this. Information
on the frequency of maintenance is provided elsewhere in the manual (see section 10).
Anode warning
This message appears when the anode protection is no longer active. If the message
appears, you must contact your service and maintenance engineer.
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3.6.5
Note
The water heater continues to function when this message appears. If you ignore the
anode warning, the tank protection cannot be guaranteed. The warranty will be void.
Q/T Sensor warning
This message appears if the Q/T sensor has not been connected (properly) but has been
selected in the service program (see section 9.2.9.5). If the message appears, you must
contact your service and maintenance engineer.
3.6.6
Collector temperature warning
This message appears whenever the collector temperature is too high. This message
disappears automatically. If the message does not disappear, you must contact your
service and maintenance engineer.
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User part
4
Use
4.1
Turn on the water heater
Start the water heater as follows:
1.
2.
3.
4.
Fill the water heater (see section 7.9.1).
Open the manual gas valve.
Switch on the power to the water heater using the isolator between the water heater
and the power supply.
Switch the controller ON by setting the control switch to position I.
The display will now show INTERNAL CHECK for about 10 seconds and will then go to
the main menu.
5.
Press once on the blue arrow [ ] to position the cursor beside ON, then press
[ENTER]. The display shown in the figure will appear.
6.
Confirm the selection START OPERATION with [ENTER] .
The appliance is now in ON mode. If there is a heat demand, the appliance will run
through the heating cycle (see section 4.1.1).
If the heating cycle is not run, there is no heat demand; if this is the case, Tset will
probably need to be set (see section 4.3.3).
4.1.1
The appliance's heating cycle
The entire cycle is explained in the following example, which assumes the water heater is
in operating mode ON.
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Note
The same operating cycle applies to the other operating modes.
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When the water heater starts, it will run through the following steps:
1.
The water temperature drops below the set temperature of (for example) 65°C. The
controller detects a heat demand and starts the operating cycle.
is activated.
The icon
-
2.
Once demand is registered, the fan is started to vent any gases that may be present.
This phase is called pre-purge and lasts about 15 seconds.
The icon
is activated.
-
3.
The message PRE PURGE appears.
During the pre-purge, the pressure switch closes.
is activated.
The icon
-
The message PRESSURE SWITCH appears.
4.
This is then followed by the (pre-)glow of the hot surface igniter.
The icons
and
are dimmed
is activated.
The icon
5.
After a number of seconds pre-glow, the gas control valve is opened and ignition
takes place.
The icon
is activated.
The message IGNITION appears.
-
6.
After ignition, the flame is detected and the appliance will be running. This means
that actual heating has started:
The icon
is dimmed.
-
26
The message HEAT DEMAND appears.
The icon
is activated.
The message RUNNING appears.
User part
7.
When the water is up to temperature, the heat demand ceases and the post-purge
starts. This takes about 25 seconds.
and
are dimmed.
The icons ,
-
8.
is activated.
The icon
The message POST PURGE appears.
Following the post-purge, the fan stops and the pressure switch opens:
and
are dimmed.
The icons
The message POST PURGE vanishes.
-
With any subsequent heat demand, the heating cycle will resume from step 1.
4.2
Turn off the water heater
4.2.1
Turn off for a short period
To decommission the water heater for a short period, you must activate the frost
protection. The frost protection will prevent water from freezing in the water heater.
Activate the frost protection as follows:
1.
2.
Press [
] to select the main menu.
Using [ ] and [ ], place the cursor beside OFF.
Confirm with [ENTER].
The frost protection cuts in when the water temperature drops below 5°C. The text FROST
will then appear on line one of the display. The water heater will heat the water to 20°C
(Tset) before dropping back to mode OFF.
c
n
4.2.2
Caution
The anode protection remains active when the OFF mode is selected.
Note
These values of 5°C and 20°C cannot be adjusted.
Note
If the water heater is not used for longer than two months and the water is not drained,
air bubbles may form in the water heater. This can lead to air in the water pipes.
Isolate from the mains
The water heater may only be isolated from mains power in the correct way. The correct
procedure is as follows:
1.
2.
Activate the MENU with [
].
Position the cursor in front of OFF.
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3.
c
Caution
Failure to wait until the fan stops can cause damage to the water heater.
4.
5.
6.
n
4.2.3
Confirm OFF with [ENTER].
Wait until the fan has stopped. The icon
is then dimmed.
Switch the water heater OFF (position 0) using the control switch on the operator
interface.
Isolate the water heater from the power supply by setting the isolator between the
water heater and the mains power supply to position 0.
Note
Setting the main switch between the water heater and the electricity mains to 0 will
switch off the power supply to the potentiostat; there is then no longer any anode
protection.
Turn off for a long period
When the water heater needs to be turned off for more than 2 months, contact your
service and maintenance engineer to decommission the water heater.
4.3
Main menu
The MENU is reached by pressing [
] on the operator interface.
The main menu comprises:
•
•
•
•
•
n
28
OFF
Select this option if you wish to turn off the water heater for a short period (see
section 4.2), but do not wish to drain it. In this mode, the frost protection is active.
This prevents water from freezing in the water heater.
ON
In this mode, the water heater continually responds to the hot water demand (see
section 4.3.2).
WEEK PROGRAM
Select this option to allow the water heater to respond to demand only during preprogrammed periods (see section 4.3.4). Outside those periods, only frost protection
is active.
EXTRA PERIOD
Select this option to overrule OFF mode or PROG mode (i.e. Week program) so
that a single temporary period (see section 4.3.9) of heat demand will be fulfilled.
SETTINGS
Select this option to set the language and the time (see section 4.3.10). You can also
use this option to display the regulation interval (temperature), and the ignition and
working speeds of the fan.
Note
If you fail to make any selection with the main menu open, then after 30 seconds, the
water heater will automatically return to the mode it was previously in.
User part
4.3.1
Notation conventions for menu-related instructions
The MENU [
] of the controller is divided into submenus. For example, SETTINGS is one
of the functions reached from the main menu. The menu SETTINGS is itself divided into
sub-menus. For example, LANGUAGE is a sub-menu of SETTINGS.
So, for example, to select menu LANGUAGE, this manual employs the following
convention:
•
[
]: SETTINGS | LANGUAGE
Confirm with [ENTER].
This means:
1.
2.
3.
4.
4.3.2
[
]: Activate the main menu with [
].
SETTINGS: Using [ ] and/or [ ] to go to SETTINGS and confirm with [ENTER].
LANGUAGE: Using [ ] and/or [ ] to go to LANGUAGE
Confirm with [ENTER]. After pressing [ENTER], you will have activated sub-menu
LANGUAGE.
Switching to ON mode
You can switch the water heater to ON mode from any operational mode, as follows:
1.
n
]: ON | START OPERATION
[
Confirm with [ENTER].
Note
Also refer to the chapter on starting the water heater (see section 4.1).
4.3.3
Setting the water temperature
4.3.3.1
Setting the water temperature via the SET POINT menu
The water temperature can be set to any value between 40°C and 80°C.
Set the water temperature via:
n
1.
]: ON | CHANGE SETPOINT
[
Confirm with [ENTER].
2.
Use:
[ ] to increase the value;
[ ] to decrease the value.
Confirm with [ENTER].After confirming, the appliance enters ON mode.
-
Note
If the preset temperature is higher than the current water temperature, then the
appliance might not immediately start the heating cycle. To prevent excessively frequent
switching on and off, there is a heating margin. The standard setting for this margin is
5°C. The appliance starts heating up if the water temperature is 5°C below the SETPOINT.
We refer to this margin as the hysteresis. The service and maintenance engineer can set
the hysteresis value.
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4.3.3.2
Setting water temperature during ON mode
The water temperature can also be directly adjusted when the water heater is in ON
mode.
Simply use:
•
•
•
4.3.4
[ ] to increase the value;
[ ] to decrease the value.
Confirm with [ENTER].
Week program
Using the week program, you can set the water temperature for the days and times you
want.
If the appliance is running under a week program, then this is indicated on the display by
the text PROG on the first line (see the figure). The second line shows the time of day, the
day of the week and the temperature. The third line shows the next switching time of the
week program and the programmed temperature. The fourth line shows the text
PROGRAM ACTIVATED.
The appliance's default week program switches the appliance on every day at 00:00 and
off at 23:59. The default water temperature setting is 65 ºC.
If you want, you can change every setting in the appliance's standard week program.
If the water temperature becomes too low while the week program is running, the
appliance will run through the heating cycle (see section 4.1.1) and return to the week
program.
The following topics are covered here:
•
•
•
•
4.3.5
Starting and stopping the week program (see section 4.3.5)
Changing the appliance's standard week program (see section 4.3.6)
Adding times to a week program (see section 4.3.7)
Deleting times from a week program (see section 4.3.8)
Starting and stopping the week program
The week program can be started up from any other operating mode, as follows:
1.
[
]: WEEK PROGRAM | START OPERATION
Confirm with [ENTER].
A week program can be shut down simply by activating a different operating mode, for
example the ON mode.
4.3.6
Changing the appliance's standard week program
n
Note
First fill-in the desired week program on the supplied week program card.
A week program is made up of a number of programmable periods in which you can have
the appliance switch on and off. A period consists of:
•
•
•
30
switch-on time: day of the week, hours and minutes
switch-off time: hours and minutes
the water temperature setting
User part
•
n
on/off setting for a program-controlled pump.
Note
The switch-off time must always be followed by a switch-off time on the same day of the
week. A maximum of three periods may be programmed per day. You can program a
maximum of 21 periods.
Call up the menu for the week program as follows:
•
[
]: WEEK PROGRAM | PROGRAM OVERVIEW.
Confirm with [ENTER].
The display shows the menu for the week program, see the figure below. With the default
setting, the program switches on and off every day at 00:00 and 23:59 respectively, the
water temperature is 65ºC and the pump is switched on (P).
Example
As an example, we will set the switch-on time for Sunday to 08:15 hours, and the
matching switch-off time to 12:45 hours. The water temperature will be set to 75ºC and
the pump will run continuously.
The following settings are entered one by one using the menus: the switch-on time, the
switch-off time, the desired water temperature, and the mode of the program-controlled
pump.
4.3.6.1
Week program: setting the switch-on time
1.
2.
Bring the cursor to SU
Confirm with [ENTER].
The day indicated by ® blinks.
Use [ ] and [ ] to set the desired day. In the example this is SU (Sunday).
Confirm with [ENTER].
The cursor moves to the hour digits, which will blink.
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31
3.
n
Note
Because the switch-off time can never be earlier than the switch-on time, the switch-off
time setting is automatically adjusted with the switch-on time.
4.
4.3.6.2
4.3.6.3
1.
Use [ ] and [ ] to set the hours. In the example, this is 12.
Confirm with [ENTER].
The cursor moves to the minute digits, which will blink.
2.
Use [ ] and [ ] to set the minutes. In the example, this is 45.
Confirm with [ENTER].
The cursor moves to the desired water temperature.
Week program: setting the water temperature
Use [ ] and [ ] to set the water temperature. In the example this is 75°C.
Confirm with [ENTER].
The cursor moves to PUMP ON
Week program: setting the program-controlled pump
1.
32
Use [ ] and [ ] to set the minutes. In the example, this is 15.
Confirm with [ENTER].
The cursor moves to the switch-off hour digits, which will blink.
Week program: setting the switch-off time
1.
4.3.6.4
Use [ ] and [ ] to set the hours. In the example, this is 08.
Confirm with [ENTER].
The cursor moves to the minute digits, which will blink.
If required, a pump can be controlled during the period. Use [ ] and [ ] to set
PUMP ON. The pump ensures a regular circulation of hot water in the hot water
pipes. You can skip this step if you there is no pump in your hot water circuit.
Confirm with [ENTER].
The cursor moves to SAVE.
User part
2.
Confirm with [ENTER].
The display shown in the figure will appear.
3.
If you wish, you can use [ ] to scroll to another day, and change more switch-on
(see section 4.3.6.1) and switch-off (see section 4.3.6.2) times.
After changing all desired switch-on and switch off times, you can start running the
week program:
Scroll with [ ] to START OPERATION.
Confirm with [ENTER].
4.
4.3.7
Adding times to a week program
Call up the menu to INSERT switch-on and switch-off times into a week program as
follows:
1.
[
]: WEEK PROGRAM | PROGRAM OVERVIEW.
Confirm with [ENTER].
The display shows the menu for the week program. The cursor points to the active
period.
2.
Scroll [ ] to INSERT.
Confirm with [ENTER].
The submenu for adding a period will appear.
Example
As an example, we will program an extra period in which the switch-on time is set to
18:00 and the corresponding switch-off time to 22:00. The water temperature will be set
to 75ºC and the pump will run continuously.
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33
3.
4.
4.3.8
Proceed as follows:
a.
Set the switch-on time (see section 4.3.6.1).
b.
Set the switch-off time (see section 4.3.6.2).
c.
Set the water temperature (see section 4.3.6.3).
d.
Set the program-controlled pump (see section 4.3.6.4).
To activate the week program with the new period added, scroll down with [ ] to
START OPERATION and confirm with [ENTER].
Deleting times from a week program
All switch-on/off times are shown sequentially in the display. Assume that the switchon/off times for the water heater are programmed as in the figure.
To delete a period, proceed as follows:
1.
[
]: WEEK PROGRAM | PROGRAM OVERVIEW.
Confirm with [ENTER].
2.
Scroll with [ ] to PROGRAM OVERVIEW.
Confirm with [ENTER].
3.
34
The display shows the menu for the week program.
Scroll with [ ] to DELETE.
Confirm with [ENTER].
To warn you that you are now working in the delete sub-menu, the cursor is replaced
with an exclamation mark (!) and the period settings will blink.
User part
4.
Scroll with [ ] to the day to be deleted. For example, SU (Sunday) in the second
period. See the figure.
Confirm with [ENTER].
5.
The lines showing switch-on/off times are replaced by the text DELETE BLOCK?. See
the figure.
Confirm with [ENTER].
(or use [RESET] to cancel).
The switching period has been deleted. You will return now to the week program
menu. The cursor points to the first programmed period.
6.
4.3.9
Scroll with [ ] to START OPERATION.
Confirm with [ENTER].
The week program is active.
Extra period
Use an extra period when you either want to have the water heater switch on and off for a
certain period, either without modifying the active week program, or without taking the
water heater out of OFF mode (frost
protection active).
If the water heater is running under an "extra period", then this is indicated in the display
with the text EXTRA.
During the extra period, if the water temperature becomes too low, the water heater will
run through the operating cycle (see section 4.1.1), then return to the extra period.
The same settings can be made for an extra period as for a week program (see section
4.3.6).
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35
4.3.9.1
Programming an extra period
1.
2.
Call up the menu for entering an extra period via:
[
]:: EXTRA PERIOD
Confirm with [ENTER].
The display show the settings for the extra period.
Setting the switch-on time
n
3.
Use [ ] and [ ] to set the day. In the example this is SU.
Confirm with [ENTER].
The cursor moves to the hour digits, which will blink.
4.
Use [ ] and [ ] to set the switch-on hour to the desired value. In the example, this
is 08.
Confirm with [ENTER].
The cursor moves to the minute digits, which will blink.
Note
Because the switch-off time can never be earlier than the switch-on time, the switch-off
time setting is automatically adjusted with the switch-on time.
5.
Use [ ] and [ ] to set the minutes. In the example, this is 15. Confirm with
[ENTER].
The cursor moves to the hour digits of the switch-off period.
Setting the switch-off time
36
6.
Use [ ] and [ ] to set the hours. In the example, this is 012.
Confirm with [ENTER].
The cursor moves to the minute digits, which will blink.
7.
Use [ ] and [ ] to set the minutes.In the example, this is 45.
Confirm with [ENTER].
The cursor moves to the water temperature. See the figure
User part
Setting the water temperature
8.
Use [ ] and [ ] to set the water temperature. In the example this is 75°C.
Confirm with [ENTER].
The cursor moves to PUMP ON
Setting the program-controlled pump
9.
If required, a pump can be controlled during the period. Use [ ] and [ ] to set
PUMP ON. The pump ensures a regular circulation of hot water in the hot water
pipes. You can skip this step if you there is no pump in your hot water circuit.
Confirm with [ENTER].
The cursor moves to START.
10.
Confirm with [ENTER].
The extra period has been programmed.
n
4.3.10
Note
Once the extra period has completed running, the controller returns to the mode ON, OFF
or WEEK PROGRAM. The following week, the extra period will NOT be automatically
switched back on.
Settings
Using the option SETTINGS you can adjust certain settings, and display certain water
heater specifications:
•
•
4.3.10.1
Adjustable settings
Menu language.
Current day of week and time.
Displayable water heater specifications, this category is only relevant to the
installation engineer and/or service and maintenance engineer
Regulation interval (water temperature).
Ignition speed of fan.
Working speed of fan.
Setting menu language
To set menu language:
1.
2.
Call up the menu for selecting the language as follows:
[
]: SETTINGS.
Confirm with [ENTER].
The display shows the menu for settings.
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37
3.
The cursor is positioned beside LANGUAGE.
Confirm with [ENTER].
The display shows the language selection menu.
4.
Scroll with [ ] to the desired language.
Confirm with [ENTER].
The language is set.
4.3.10.2
Setting day and time
To enter the time and day:
1.
2.
3.
Call up the menu for entering the day and time as follows:
[
]: SETTINGS.
Confirm with [ENTER].
The display shows the menu for settings.
Scroll with [ ] and [ ] to DAY/TIME.
Confirm with [ENTER].
The display shows the sub-menu for adjusting the day.
38
4.
The cursor is positioned beside Sunday.
Scroll with [ ] and [ ] to the desired day.
Confirm with [ENTER].
The day has been set. The display shows the submenu for adjusting the time.
5.
The cursor moves to the hour digits, which will blink.
Scroll with [ ] and [ ] to the current hour, for example 15.
Confirm with [ENTER].
User part
6.
The cursor moves to the minute digits, which will blink.
Scroll with [ ] and [ ] to the next minute, for example 45.
Confirm the minute setting with [ENTER].
The time has been set.
n
4.3.10.3
Note
The water heater takes no account of daylight saving.
Displaying water heater specifications
n
Note
This category is solely intended for the installation engineer and/or service and
maintenance engineer.
The corrected data is shown in the table of general and electrical data.
Call up the menu to display the water heater specifications as follows:
1.
[
]: SETTINGS.
Confirm with [ENTER].
2.
Scroll with [ ] to SPECIFICATIONS.
Confirm with [ENTER].
The display shows the sub-menu for displaying water heater specifications.
3.
Scroll with [ ] to the section to be displayed, for example REGULATION INTERVAL.
The corresponding display appears
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39
40
User part
Installation, Maintenance and Service
part
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
41
42
User part
5
Introduction
5.1
About the water heater
The HWHC water heater is intended for heating water for sanitary purposes.
The HWHC is a condensing gas–fired storage water heater with a fan in the air intake. The
flue gasses transfer their heat to the water through an efficient heat exchanger. The water
heater has a concentric venting connector and can function as an open or as a roomsealed water heater.
The water is heated partly by means of the heat exchanger in the bottom of the tank. This
heat exchanger can be connected to e.g. a solar energy source.
5.2
The appliance's heating cycle
The appliance's heating cycle is activated when the measured water temperature (T1) falls
below the threshold value (Tset). This threshold value depends on the currently selected
appliance operating mode. For example, if the appliance is in OFF mode (frost
protection), then this value is 5°C. If the appliance is in ON mode, this threshold value is
adjustable, for example to 65°C.
The heating cycle runs successively through the following states:
•
•
•
•
•
•
•
5.3
HEAT DEMAND;
PRE-PURGE;
PRESSURE SWITCH;
PRE-GLOW;
IGNITION;
RUNNING;
POST-PURGE.
Working principle
The water heater is fitted with a modulating premix burner system with 1:1 gas-to-air
ratio regulation. The air required for combustion is delivered by the fan (18). The gas is
supplied via the gas control valve (16) and the venturi (30) on the intake side of the fan.
The 1:1 gas-to-air ratio always guarantees the most efficient gas/air mixture.
In this water heater, the cold water enters the bottom of the tank through the cold water
inlet (14). The water is heated by means of a heat exchanger (55) connected to a solar
heating system and a gas-fired heat exchanger (11). The heated tap water leaves the tank
through the hot water outlet (2). Once the water heater is completely filled with water, it
will constantly be under mains water pressure. As hot water is drawn from the water
heater, cold water is immediately added.
The special design of the heat exchanger (11) ensures that the flue gases are first led
downwards via the combustion chamber, then upwards via the heat exchanger, and
downwards again alongside the water in the tank. The flue gases gradually become cooler
in the process. Because the cooled flue gases flow alongside the cold water lower down in
the tank, they start to condense. This condensation causes latent heat energy to be
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
43
transferred to the cooler water, thereby increasing the performance of the unit. The
condensate yielded by this process is discharged via the condense trap (23).
The insulation layer (24) prevents heat loss. The inside of the tank is enamelled to protect
against corrosion. The anodes (9) provide extra protection against corrosion.
The water heater has an inspection and cleaning opening (12) for maintenance.
Fig. HWHC water heater
16
2
5
1.
Cover
2.
Hot water outlet
3.
Electrical connector block
4.
Controller
5.
Pressure switch
6.
Control panel
7.
Temperature sensor T1
8.
Combustion chamber
9.
Anode
22
10.
Tank
10
11.
Heat exchanger
1
7
19
18
4
58
6
20
28
30
8
3
21
9
17
13
16
18
20
12
17
Inspection and cleaning
opening
13.
Temperature sensor T2
14.
Cold water inlet
23
15.
Drain valve
55
16.
Gas control valve
17.
Burner
18.
Fan
24
19.
Air supply hose
29
20.
Hot surface igniter
21.
Flame probe
22.
Chimney pipe
23.
Condens trap
24.
Insulation layer
28.
Potentiostat
29.
Base
30.
Venturi
59
30
21
12.
11
15
14
56
55.
Heat exchanger (e.g.
solar heating system)
44
56.
Temperature sensor S2
58.
Flue gas test point
59.
Pressure-reducing valve
Installation, Maintenance and Service part
5.4
Operating cycle
The water temperature (T1) at the top of the water heater is used to control when the gas
burner is started and stopped. The temperature changes in the water heater are used for
switching the solar heating system on and off (using T1 and S2). T1 is the curve shown in
the figure. In addition, temperatures S1 and S2 are used by the solar heating system
controller. Temperature S1 is measured in the solar collector and S2 between the inlet and
outlet of the heat exchanger (55).
The other settings that govern the control behaviour are:
•
Tset
Tset is the the required water temperature that has been set on the appliance (see
section 4.3.3.1). As soon as T1 falls below Tset, the solar heating system starts
heating the water, but only if the temperature of the heating fluid (S1) is greater
than the temperature measured at the appliance (sensor S2) by a given (adjustable)
amount. When T1 = Tset = Tsolar limit, heating by the solar heating system stops.
There is one exception to this rule, which is when Tsolar limit is set to a higher value
than Tset.
•
Hysteresis
The moment that T1 falls below (Tset - Tsolar diff - hysteresis), the controller registers
such a heat demand that the gas burner and the solar heating system jointly heat
the water. The solar heating system is only employed when the temperature
measured by S1 is a certain (adjustable) value grater than that of S2.
•
Tsolar diff
When Tnet exceeds (Tset - Tsolar diff), the gas burner is shut off and the water is
heated by the solar heating system alone. When T1 rises above Tset (provided that
Tset = Tsolar limit), the solar heating system is switched off. The value of Tsolar diff is
•
adjustable (see section 9.2.9.4).
Tsolar limit
Preset water temperature at which heating via the solar heating system is stopped
(see section 9.2.9.3).
Fig. Graphical representation of operating cycle
Tsolar limit
A.
Gas burner on
B.
Gas burner off
T1.
No heat demand, so water is not
heated
Water heated via solar heating system
Tset
Water heated via solar heating system
Solar diff.
and gas burner
Hys.
t.
time
T.
Temperature
45°C = Minimum tap water
temperature
Tmin = 45°C
n
Note
T1 can rise above Tset. However, this is only possible if Tsolar limit is increased via the
service menu.
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46
Installation, Maintenance and Service part
6
Safety
6.1
Safety instructions
For safety instructions about the use of the water heater, refer to Safety (see section 2) in
the User part of this manual.
w
Warning
Installation, maintenance and service must be carried out by a qualified engineer in
compliance with the general and local regulations imposed by the gas, water and power
supply companies and the fire brigade. The appliance may only be installed in a room that
complies with the requirements stated in national and local ventilation regulations.
Warning
Leave the water heater electrically isolated until you are ready to commission it.
c
Caution
The water heater may only be manoeuvred in an upright position. After unpacking, make
sure that the water heater is not damaged.
Caution
Use of an incorrect roof or wall-mounted flue terminal can cause the water heater to
malfunction.
Caution
During installation, obey the instructions delivered with the sets of air supply components
and the flue gas discharge components. Make sure that the venting system does not
exceed the maximum number of 45º and 90º bends and the maximum pipe length.
Caution
Make sure that the diameter and length of the gas supply pipe are large enough to supply
sufficient capacity to the water heater.
Caution
Make sure that the condensate drain is connected to the waste water discharge using an
open connection.
Caution
Fill the water heater completely before use. Dry firing will damage the water heater.
Caution
After installation, maintenance or service, you must always check that the appliance is
gas tight and make sure that the gas supply pressure, the CO2 value and the air pressure
differential are correct.
If the gas supply pressure is not correct, contact your mains gas supply company. Do not
use the water heater.
Caution
To prevent that you damage the components of the water heater, make sure that it is
completely stopped operation before you turn off the water heater (see section 4.2). Wait
1 minute after you switch the water heater to OFF mode, before you switch the control
switch to 0.
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47
Caution
The anode protection remains active when the water heater is in OFF mode and the
control switch is set to 0.
n
6.2
Note
Any leakage from the tank and/or connections can cause damage to the immediate
environment or floors below the level of the boiler room. Install the water heater above a
waste water drain or in a suitable metal leak tray.
The leak tray must have an appropriate waste water drain and must be at least 5 cm
deep with a length and width at least 5 cm greater than the water heater.
Instructions on the water heater
The water heater has some safety instructions on its cover:
•
•
The text "Read the installation instructions before installing the appliance".
The text "Read the user instructions before putting the appliance into operation".
Also the packaging has some safety instructions:
•
•
•
•
The text "Read the installation instructions before installing the appliance".
The text "Read the user instructions before putting the appliance into operation".
The text "The appliance may only be installed in a room that meets the required
ventilation regulations".
Some safety pictograms:
CE approved
this way up
fragile
keep dry
maximum stacking height is 1
do not use a trolley
do not use a clamp truck
recycled packaging
48
Installation, Maintenance and Service part
6.3
Safety devices
6.3.1
Protection for the water heater
6.3.1.1
Water temperature protection
The controller (4) controls and monitors the safety of the water heater by means of
sensors T1 and T2. S2 is also used for protection of the water heater.
However, this is primarily intended for control of the solar heating system (see section
6.3.3).
The table explains the functioning of these temperature sensors.
Safety
Description
Against frost:
- T1 < 5 ºC
The frost protection cuts in. The water is heated to
20 °C.
- T2 < 5 ºC
Against overheating of
water:
- T1 > 88 ºC
- T2 > 88 ºC
- S2 > 88 ºC
The high-limit safeguard serves to prevent
overheating and/or excessive formation of scale in
the appliance. If the high-limit safeguard is
activated, heating is stopped. This causes the
water in the tank to cool down. Once the water has
cooled sufficiently (T1 < 81°C), the controller
resets the appliance.
For extra safety
- T1 > 93 ºC
- T2 > 93 ºC
- S2 > 93 ºC
6.3.1.2
A lockout error of the water heater controller takes
place. (see section 11) The controller must be
manually reset before the appliance can resume
operation. The reset may only be performed if T1 <
81°C.
Gas control valve
The controller opens the gas control valve so that gas can be supplied to the burner. As a
safety measure, the gas control valve has two valves. Both valves shut off the gas supply.
6.3.1.3
Fan
The fan (18) provides an optimum air supply when there is a heat demand. As a safety
feature, the fan ensures that any gases present in the combustion chamber are removed,
both before and after combustion. We refer to this as pre- and post-purge.
The fan speed is continuously monitored by the controller (4). The controller takes control
if the fan rpm varies too much from the value set.
6.3.1.4
Pressure switch
The pressure switch only guarantees the supply of air during pre-purging of the water
heater. If the pressure difference during pre-purging is sufficient, the pressure switch
closes. Refer to the general and electric specifications in the appendices (see section 12)
for the trip point for each water heater.
n
Note
The trip point of the pressure switch is not adjustable.
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
49
6.3.1.5
Flame probe
To ensure that no gas can flow when there is no combustion, the water heater is fitted
with a flame probe (21). The controller uses this probe to detect the presence of a flame,
by means of ionisation detection. The controller closes the gas control valve the instant it
detects that there is a gas flow but no flame.
6.3.2
Safety of the installation
Excessive pressure in the tank can damage the enamelled layer (in the water heater) or
the tank itself. An inlet combination and pressure-reducing valve prevents this. The inlet
combination acts as a stop valve, non-return valve and overflow valve. If the water mains
pressure is too high, a pressure-reducing valve must be used (Refer to the general and
electric specifications in the appendices (see section 12)). Both components must be fitted
in the cold water inlet (see section 7.4.2).
The use of an expansion vessel, expansion valve and/or pressure reducing valve depends
on the type of installation: unvented or vented.
6.3.2.1
Unvented installation
With an unvented installation, an expansion valve and expansion vessel prevent the
buildup of excessive pressure in the tank. This prevents damage being caused to the
enamel coating (in the water heater) or to the tank. A non-return valve prevents excessive
pressure build-up in the water supply system. This valve also prevents water from flowing
backwards from the tank into the cold water supply system. The pressure-reducing valve
protects the water heater against excess mains water pressure, refer to the general and
electric specifications in the appendices (see section 12). These components are installed
in the cold water inlet (see section 7.4.2).
6.3.2.2
Vented installation
With a vented installation, excess pressure is taken up by the open cold water head tank.
The level of the cold water head tank determines the maximum working pressure in the
tank, refer to the general and electric specifications in the appendices (see section 12).
The water heater must also be fitted with a vent pipe from the hot water pipe, which
opens into the cold water head tank.
Ideally, the vent pipe should discharge into a separate discharge channel/drain or
otherwise to the open cold water head tank. The water heater should also be fitted with a
stop valve (see section 7.4.1.2) on the hot water side.
6.3.2.3
T&P valve
A T&P valve is only mandatory in unvented installations. However, Lochinvar also
recommends the use of a T&P valve in vented installations.
A T&P (Temperature and Pressure Relief) valve monitors the pressure in the tank and the
water temperature at the top of the tank. If the pressure in the tank becomes too high the
valve will open, refer to the general and electric specifications in the appendices (see
section 12). The hot water can now flow out of the tank. Because the water heater is
under water supply pressure, cold water will automatically flow into the tank. The valve
remains open until the unsafe situation has been rectified. The water heater is fitted
standard with a connection for a T&P valve (see section 7.4.1.2).
6.3.3
Protection for the solar heating system
6.3.3.1
Drain-back tank
The solar heating system may optionally be equipped with a drain-back tank. The tank fills
itself with the heating fluid when there is no heat demand. This avoids overheating of the
solar heating system. The high insulation factor of the tank also protects the system
50
Installation, Maintenance and Service part
against freezing of the fluid. The use of the drain–back tank also serves to extend the
useful life of the fluid.
The existence of a drain-back tank is set during the installation (see section 9.2.9.1).
Refer to the solar heating system manual for more details.
6.3.3.2
Fluid temperature
The heat exchanger of the solar heating system is filled with glycol. If the temperature of
the heating fluid is too high, a signal is sent to the controller of the solar collector and the
pump of the solar collector is switched off. This signal is passed to the controller by
temperature sensor S1.
Safety
Description
Maximum temperature:
- S1 > 130 ºC
The pump of the solar heating system switches off
when the temperature of the heating fluid at S1
exceeds the maximum value. The solar heating
system enters error mode. The error is also visible
on the display of the water heater.
6.3.4
Safety of the solar heating system
6.3.4.1
Expansion vessel
The solar heating system must be equipped with an expansion vessel. An expansion vessel
serves to limit pressure variations in the system. The expansion vessel in the solar heating
system can withstand a maximum pressure of 600 kPa (6 bar). The supply pressure to the
expansion vessel depends on the static head of the system.
The system is protected from overpressure by an expansion valve (see section 6.3.4.2) as
well as the expansion vessel.
6.3.4.2
Expansion valve
The solar heating system is equipped with an expansion valve. The expansion valve
monitors the pressure in the solar heating system. Should the pressure become higher
than 600 kPa (6 bar), the valve will open. The hot water can now flow out of the
installation. The valve remains open until the unsafe situation has passed, i.e. until the
pressure has fallen back to below 600 kPa (6 bar).
n
Note
Because a closed system is pressurized and is not filled automatically, the system will
have to be filled (see section 7.9.1) again when the expansion valve has been activated.
A system with a drain-back tank is not pressurized and does not have an expansion valve.
6.4
Environmental aspects
6.4.1
Recycling
The packaging material is environmentally friendly, recyclable and relatively easy to
discard.
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
51
6.4.2
Disposal
Old end-of-life appliances contain materials that need to be recycled. When you discard
devices at the end of their service life, you must obey local legislation related to waste
disposal.
Never discard your old device together with regular waste. Put the device into a municipal
waste collection depot for electrical and electronic equipment. If necessary, ask your
supplier or your service and maintenance engineer for advice.
52
Installation, Maintenance and Service part
7
Installation
w
c
Warning
The installation must be done by a qualified person, in compliance with general and local
applicable regulations.
Caution
The water heater may not be used in rooms where chemical substances are stored or
used 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.
For more safety instructions, refer to Safety instructions (see section 6.1).
7.1
Packaging
Lochinvar recommends to unpack the water heater at or near its intended location.
Remove the packaging material carefully to prevent damage to the water heater.
7.2
Conditions
The water heater is suitable for room-sealed and for open combustion:
•
•
7.2.1
For room-sealed combustion, the air inlet does not depend on the installation site.
For open combustion, you must comply with the local applicable directives and
ventilation regulations for open water heaters.
Ambient conditions
The installation site must be frost-free. If necessary, adjust the installation site to keep it
frost-free.
Make sure that the ambient conditions are correct to prevent malfunction of the electronics
in the water heater.
Air humidity and ambient temperature
7.2.2
Air humidity
Max. 93% RH at + 25 ºC
Ambient temperature
Functionality: 0 £ T £ 60 ºC
Maximum floor load
Refer to the general and electric specifications in the appendices (see section 12) to make
sure that the maximum floor load is sufficient for the weight of the water heater.
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
53
7.2.3
Water composition
The water must comply with the regulations for drinking water for human consumption.
Water composition
n
7.2.4
Hardness
(alkaline earth ions)
>
•
•
•
•
1.00 mmol/l:
German hardness > 5.6° dH
French hardness > 10.0° fH
English hardness > 7.0° eH
CaCO3 > 100 mg/l
Conductivity
> 125 µS/cm
Acidity (pH value)
7.0 < pH value < 9.5
Note
If the water specifications differ from the specifications in the table, the tank protection
cannot be guaranteed, refer to Warranty.
Working clearances
For access to the water heater, it is recommended that the following clearances are
observed (see figure):
•
•
•
AA: around the water heater's control column and cleaning openings: 100 cm.
BB: all sides of the water heater: 50 cm.
Top of the water heater: 100 cm.
Fig. Working clearances
BB
AA
AA
n
IMD-0767 R0
Note
When installing the water heater, be aware that any leakage from the tank and/or
connections can cause damage to the immediate environment or floors below the level of
the boiler room. If this is the case, the water heater should be installed above a waste
water drain or in a suitable metal leak tray.
Note
The leak tray must have an appropriate waste water drain and must be at least 5 cm
deep with a length and width at least 5 cm greater than the diameter of the water heater.
54
Installation, Maintenance and Service part
7.3
Installation diagram
Fig. Installation diagram
UNVENTED
26
S1
42
3.
T&P valve
Stop valve (recommended in pipe C
and mandatory in pipe A)
11
B
14
Pressure reducing valve (mandatory)
4.
12 T
14
1.
5.
Non-return valve (mandatory)
6.
Circulation pump (optional)
9.
Drain valve (mandatory)
10.
Manual gas valve (mandatory)
11.
Service stop valve (recommended)
12.
Temperature gauge (recommended)
13.
Condensation drain (mandatory)
14.
Draw-off points
15.
Expansion valve (mandatory)
16.
Expansion vessel (mandatory)
D
14
10
38
3
16
C
6
4
5
4
13
F
37
S2
G
Q
16
S4
T
5
1
4
A
17.
15
9
3-way aeration valve
(recommended)
VENTED
17
H
18.
Cold water head tank
19.
Float switch
26.
Air bleed (mandatory)
37.
Combined Q/T sensor (optional)
26
S1
12 T
19
4
42
E
11
A
18
14
38.
B
14
D
14
Solar heating system pump station
(modulating - mandatory)
10
C
4
6
5
A.
Cold water supply
B.
Hot water supply
C.
Circulation pipe
D.
Gas supply
E.
Overflow pipe
F.
Supply heat exchanger
G.
Heat exchanger return
H.
Overflow protection
S1
Collector sensor (mandatory)
S2
Tank sensor (mandatory)
S4
Heat exchanger discharge sensor
38
3
16
4
13
F
S2
G
37
Q
S4
T
9
4
IMD-0784 R0
(optional)
c
Caution
The installation diagram shows a pump station with an integrated non-return valve. This
type of pump unit may only be used with closed systems. In systems with drain-back,
installation of a pump unit with non-return valve is prohibited. There are special pump
units for these systems. Please contact the pump unit supplier for this.
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
55
n
Note
Use this installation diagram when you:
•
•
•
•
•
install the water connections (see section 7.4)
install the condensate drain
install the gas connection (see section 7.5)
fill the water heater
drain the water heater
7.4
Water connections
7.4.1
Unvented water connections
w
7.4.1.1
Warning
The installation should be carried out by a competent person, in compliance with general
and locally applicable regulations.
Cold water side
See (A) in the installation diagram.
1.
2.
3.
4.
7.4.1.2
Fit an approved stop valve (4) on the cold water side as required by the applicable
regulations.
The maximum working pressure of the water heater is 8 bar. Because the pressure
in the water pipe at times can exceed 8 bar, you must fit an approved pressurereducing valve (1).
Fit a non-return valve (5) and an expansion vessel (16).
Fit an expansion valve (15) and connect the overflow side to an open waste water
pipe.
Hot water side
See (B) in the installation diagram.
n
Note
Insulating long hot water pipes prevents unnecessary energy loss.
1.
2.
3.
7.4.1.3
Optional: fit a temperature gauge (12) so you can check the temperature of the tap
water.
Fit the T&P valve (3).
Fit a stop valve (11) in the hot water outlet pipe for servicing.
Circulation pipe
See (C) in the installation diagram.
If an immediate flow of hot water is required at draw-off points, a circulation pump can be
installed. This improves comfort, and reduces water wastage.
1.
2.
3.
4.
56
Fit a circulation pump (6) of the correct capacity for the length and resistance of the
circulation system.
Fit a non-return valve (5) after the circulation pump to guarantee the direction of
circulation.
Fit two stop valves for servicing (4).
Connect the circulation pipe according to the installation diagram.
Installation, Maintenance and Service part
7.4.1.4
Condensation drain
1.
c
7.4.2
Fit a sloping waste water pipe to the condens trap (13) for condensation drainage
and connect this via an open connection to the waste water discharge.
Caution
If the condensation drain is not fitted to the waste water discharge using an open
connection, this can cause faults.
Vented water connections
w
7.4.2.1
Warning
The installation should be carried out by a competent person, in compliance with general
and locally applicable regulations.
Cold water side
See (A) in the installation diagram.
1.
7.4.2.2
Fit an approved stop valve (4) on the cold water side between the cold water head
tank (18) and the water heater, as required by applicable regulations.
Hot water side
See (B) in the installation diagram.
n
Note
Insulating long hot water pipes prevents unnecessary energy loss.
1.
2.
3.
4.
7.4.2.3
Fit the T&P valve (3).
Optional: fit a temperature gauge (12) so you can check the temperature of the tap
water.
Fit a stop valve (4) in the hot water outlet pipe for servicing.
If a circulation pipe is required, continue by installing the circulation pipe (see section
7.4.1.3).
Circulation pipe
See (C) in the installation diagram.
If an immediate flow of hot water is required at draw-off points, a circulation pump can be
installed. This improves comfort, and reduces water wastage.
1.
2.
3.
4.
7.4.2.4
Fit a circulation pump (6) of the correct capacity for the length and resistance of the
circulation system.
Fit a non-return valve (5) after the circulation pump to guarantee the direction of
circulation.
Fit two stop valves for servicing (4).
Connect the circulation pipe according to the installation diagram.
Condensation drain
1.
c
Fit a sloping waste water pipe to the condens trap (13) for condensation drainage
and connect this via an open connection to the waste water discharge.
Caution
If the condensation drain is not fitted to the waste water discharge using an open
connection, this can cause faults.
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
57
7.5
Gas connection
c
Caution
Make sure that the gas supply pipe has the correct diameter and length to supply
sufficient capacity to the water heater.
Caution
Make sure that the gas supply pipe is clean. Contamination in the pipe can cause damage
to the gas control valve, during operation.
Caution
Install the manual gas valve on a spot accessible for the user.
Install the gas connection:
1.
2.
3.
4.
5.
7.6
Solar heating system
n
Note
Please refer to the installation diagram (see section 7.3), electrical diagram (see section
12.6) and terminal block (see section 7.8.4.1) for details of how to connect the solar
heating system.
1.
2.
3.
4.
w
7.7
Install a manual gas valve (10) in the gas supply pipe.
Make sure that the gas pipe is clean before use. If necessary, remove the
contamination from the pipe.
Close the manual gas valve.
Install the gas supply pipe to the gas control valve.
Make sure that there are no gas leaks.
Connect the supply from the solar collector to the inlet (F) of the heat exchanger.
Connect the return pipe to the solar collector to the outlet (G) of the heat exchanger.
Connect the lead to the solar heating system controller and sensor S2, see:
electrical diagram (see section 12.6) and
connections table (see section 7.8.4.1).
Connect the communication cable between the solar heating system controller and
the water heater, see:
electrical diagram (see section 12.6) and
connections table (see section 7.8.4.1).
-
Warning
The installation diagram shows a pump station with an integrated non-return valve. This
type of pump unit may only be used with closed systems. In systems with drain-back,
installation of a pump unit with non-return valve is prohibited. There are special pump
units for these systems. Please contact the pump unit supplier for this.
Venting system
There are several alternatives for installation of the air inlet and flue gas outlet:
58
Installation Version
type
Description
B23
Open
Air for combustion is drawn from installation room
and the flue gasses leave the water heater via a
vertical roof terminal.
C13
Closed
Concentric and/or parallel venting system, with
horizontal air inlet and flue gas outlet, in same
pressure zone.
Installation, Maintenance and Service part
Installation Version
type
Description
C33
Closed
Concentric and/or parallel venting system, with
vertical air inlet and flue gas outlet, in same
pressure zone.
C43
Closed
Water heaters on common air inlet and flue gas
outlet (concentric and/or parallel) in a multiple
floor building.
C53
Closed
Separate air inlet and flue gas outlet terminal
types mixed. Air inlet and flue gas outlet
termination may be in different pressure zone.
C63
Closed
Water heaters supplied without venting materials.
These water heaters must be installed in
compliance with local regulations. The water heater
is intended to be connected to a separately
approved and marketed venting system.
This manual does not discus installation type B23. When you need a B23 system, contact
Lochinvar for more information.
c
Caution
Always make sure that the flue gas outlet discharges into an area approved for the
correct type of installation.
Caution
The use of a different wall or roof terminal can result in incorrect functioning of the water
heater. Use the part number from the table to order a terminal set from your supplier or
the manufacturer.
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
59
Fig. Venting systems
60
Installation, Maintenance and Service part
7.7.1
C13/C33 concentric systems
Use a wall terminal set or a roof terminal set to install a C13 or a C33 concentric venting
system.
Description Concentric
Venting material
HWHC 44-370
and 63-370
Manufacture venting material
Muelink & Grol
Construction
Concentric
Material flue gas outlet
Thick walled aluminum
Material air inlet
Thin walled galvanized
steel
Diameter flue gas outlet
100 mm
Diameter air inlet
150 mm
Description parts
Lochinvar Part
number
Wall terminal set
ECBH001
A wall terminal (1), a 500 mm
concentric pipe and a 90° bend
Wall terminal
LV302505
Roof terminal set
ECBV001
A roof terminal (2), a 500 mm
concentric pipe and a roof plate
Roof terminal
LV311458
Concentric pipe 500 mm
LV302499
Concentric pipe 1000 mm
LV311450
Concentric pipe 1500 mm
LV311451
Concentric bend 45°
LV311454
Concentric bend 90°
LV302502
1 - supplied with wall flange and clamping ring
2 - supplied with clamping ring
Fig. Example concentric venting system
IMD-0792 R0
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
61
c
Caution
During installation, obey the instructions delivered with the sets of air supply components
and the flue gas discharge components. Make sure that the venting system does not
exceed the maximum number of 45º and 90º bends and the maximum pipe length.
Caution
Use a run-off of 50 mm per meter towards the water heater.
Refer to the table for the correct pipe dimensions of the C13 and C33 concentric systems.
7.7.2
Description
Unit
HWHC 44-370 HWHC 63-370
Diameter flue discharge/
air inlet
mm/mm
100/150
100/150
Maximum length
m
40
40
Maximum number of
90º bends
-
7
7
C13/C33 parallel systems
Use a wall terminal set or a roof terminal set to install a C13 or a C33 parallel venting
system.
Description Parallel
Venting material
HWHC 44-370 and
63-370
Manufacture venting material
Muelink & Grol
Construction
Parallel
Material flue gas outlet
Thick walled aluminum
Material air inlet
Diameter flue gas outlet
100 +0,6/-0,6 mm
Diameter air inlet
Description parts
Lochinvar Part
number
Wall terminal (1)
LV302505
Roof terminal (2)
LV311463
Adapter box concentric to
parallel - terminal side
LV307142
Adapter box concentric to
parallel - water heater side
LV304204
Parallel pipe 500 mm
LV307160
Parallel pipe 1000 mm
LV307161
Parallel bend 45°
LV310197
Parallel bend 90°
LV307183
1 - supplied with wall flange and clamping ring
2 - supplied with clamping ring
62
Installation, Maintenance and Service part
Fig. Example parallel venting system
IMD-0794 R0
Refer to the table for the correct pipe dimensions of the C13 or a C33 parallel venting
systems.
Description
Unit
HWHC
44-370(1)
Diameter flue discharge/
air inlet
mm
2x100
Maximum length air inlet
m
55
Maximum length flue gas
outlet
m
55
Lequivalent 45°-bend
m
1,2
Lequivalent 90°-bend
m
4,6
Diameter flue discharge/
air inlet
mm
2x130
Maximum length air inlet
m
100
Maximum length flue gas
outlet
m
100
Lequivalent 45°-bend
m
1,4
Lequivalent 90°-bend
m
2,4
Default
Diameter enlargement
1 - When the maximum total length for the default diameter of 100 mm is insufficient,
diameter 130 mm should be used. Any diameter enlargement must be carried out on both
air inlet and flue gas outlet.
c
Caution
Always make sure the installation is in compliance with the requirements stated in this
table.
Caution
Use a run-off of 50 mm per meter towards the water heater.
Calculate the maximum length of the air inlet and the flue gas outlet seperately:
1.
2.
Sum the lengths of the different pipe sections without bends. Ignore the length of
the adaptor box.
Sum the lengths of the bends. Ignore the bend in the adapter box:
Sum Lequivalent for each 45° bend.
-
Sum Lequivalent for each 90° bend.
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
63
3.
4.
7.7.3
Sum the lengths of the pipe sections and the lengths of the bends to calculate the
overall length of the air inlet and the flue gas outlet.
Adjust the length of the air inlet and/or the flue gas outlet when the overall length
exceeds the maximum length as stated in the table.
C43/C53/C63 systems
The length of the air inlet and flue gas outlet is the same for C43, C53 and C63 systems as
for C13 and C33 systems:
•
•
n
Refer to C13/C33 concentric systems for the maximum pipe lengths of concentric
systems.
Refer to C13/C33 parallel systems for the maximum pipe lengths of parallel systems
and non-concentric systems.
Note
Only use a C43 venting system when the common duct is a natural draught chimney. The
common duct is part of the building, not a part of the system.
Note
In a C53 venting system the flue gas terminal must be CE approved and must comply to
the EN 1856-1 requirements.
Note
Connect a C63 venting system to a separately approved and marketed system for the
supply of combustion air and discharge of flue gasses.
The flue gas terminal must comply to the EN 1856-1 requirements. The maximum
allowable recirculation rate is 10% under wind conditions.
Contact Lochinvar for more information and/or part numbers of the C43, C53 and C63
venting systems.
Concentric systems
Refer to the table for the correct pipe dimensions of the C43, C53 and C63 concentric
systems.
Description
HWHC 44-370 and
63-370
Manufacture venting material
Muelink & Grol
Construction
Concentric
Material flue gas outlet
Thick walled aluminum
Material air inlet
Thin walled galvanized
steel
Diameter flue gas outlet
100 mm
Diameter air inlet
150 mm
Refer to C13/C33 concentric systems for the Lochinvar part numbers. The same parts can
be used for the C43, C53 and C63 concentric systems.
Parallel and non-concentric systems
Refer to the table for the correct pipe dimensions of the C43, C53 and C63 parallel
systems.
Description
HWHC 44-370 and
63-370
Manufacture venting material
Muelink & Grol
Construction
Parallel
Material flue gas outlet
Thick walled aluminum
Material air inlet
64
Installation, Maintenance and Service part
Description
HWHC 44-370 and
63-370
Diameter flue gas outlet
100 +0,6/-0,6 mm
Diameter air inlet
Refer to C13/C33 parallel systems for the Lochinvar part numbers. The same parts can be
used for the C43, C53 and C63 parallel systems.
Use the "adapter box concentric to parallel - water heater side" (part number LV312209)
for C63 parallel systems.
7.8
Electrical connections
w
c
Warning
Leave the water heater electrically isolated until you are ready to commission it.
Caution
The water heater is phase-sensitive. It is absolutely essential to connect the mains live
(L) to the live of the water heater and the mains neutral (N) to the neutral of the water
heater.
Caution
There must be no potential difference between neutral (N) and earth (A). Use an isolating
transformer (see section 7.8.3.1) in the supply circuit when there is a potential difference.
The figure shows a view of the terminal block, and the table explains the relevant
connections.
Fig. Terminal block
A. Screws
B. Cover
C. Terminal block
7.8.1
Preparation
In preparation, you must first remove the two covers, and the cover of the electrical
section.
1.
2.
Undo the screws of the covers.
Carefully remove the covers from the water heater.
The electrical section is now visible.
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
65
3.
n
Mains voltage
Loosen the 2 screws (A) and remove the cover (B) from the electrical section.
The connector block (C) is now visible.
Note
Consult the table for the connections and consult the electrical diagram for the electrical
component connections.
Isolating transformer
Alarm Out
Program
External
BUS
ON/OFF
link
X3
X4
X5
X6
21
22
23
24
controlled
Primary
pump
Secondary
N
L
A
N
L1
A
N
L2
A
X1
X2
A
N
L3
A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
7.8.2
16 to 20
Mains power
n
Note
The water heater is supplied without a power cable and isolator.
Use a power cable with cores of at least 3 x 1,0 mm2 and a double-pole isolator with a
contact gap of at least 3 mm.
Connect the water heater to the mains power supply:
1.
2.
3.
4.
7.8.3
Connect neutral (N), live (L) and earth (A) of the power cable to terminals 1 thru 3 of
the terminal block as shown in the table (see section 7.8.1).
Fit the power cable in the strain relief.
Connect the power cable to the isolator.
If you have no more connections to make:
Fit the cover on the terminal block.
Fit the covers onto the water heater.
-
Optional electrical connections
Optionally, it is possible to:
•
•
•
•
7.8.3.1
Connect
Connect
Connect
Connect
an isolating transformer (see section 7.8.3.1).
a program-controlled pump (see section 7.8.3.2).
an external ON mode switch (see section 7.8.3.3).
an additional error signal (see section 7.8.3.4) to the water heater.
Isolating transformer
For more information about an isolating transformer, or to order an isolating transformer,
please contact Lochinvar.
An isolating transformer should be used if there is a case of 'floating neutral'.
n
Note
The total power consumed by the appliance goes via the isolating transformer.
1.
Refer to the fitting instructions provided with the isolating transformer. (Contact the
supplier for details of the correct isolating transformer.)
2.
Connect the neutral (N), live (L) and earth (A) of the power cables to terminals 4
through 9 of the connection block according to the table (see section 7.8.1).
Fit the cables in the strain relief.
If you have no more connections to make:
Fit the cover on the terminal block.
Fit the covers onto the water heater.
Connect the power cable to the isolator.
3.
4.
5.
7.8.3.2
Program-controlled pump
n
66
Note
The maximum power capacity for a pump regulated by the controller is 100W.
Installation, Maintenance and Service part
1.
2.
3.
7.8.3.3
Connect neutral (N), live (L) and earth (A) to terminals 13, 14 and 15 as indicated in
the table (see section 7.8.1).
Fit the cable in the strain relief.
If you have no more connections to make:
Fit the cover on the terminal block.
Fit the covers onto the water heater.
External ON mode switch
External ON/OFF is an option for connecting an external ON/OFF switch. In the OFF
position, the programmed operating mode is active. In the ON position, the programmed
operating mode is overruled, and "ON mode" is active.
1.
2.
3.
7.8.3.4
Connect leads (X3 and X4) to terminals 21 and 22 according to the table (see section
7.8.1).
Fit the cable in the strain relief.
If you have no more connections to make:
Fit the cover on the terminal block.
Fit the covers onto the water heater.
Additional error signal
The appliance has a relay terminal that is switched when an error is detected. This can be
used to signal errors, for example with a bulb. A 230V circuit can be powered directly.
Other voltages require a relay prescribed by the manufacturer.
1.
2.
3.
7.8.3.5
Connect the phase cables (X1 and X2) to points 10 and 11 according to the table
(see section 7.8.1). If required, connect earth (A) to terminal 12.
Fit the cable in the strain relief.
If you have no more connections to make:
Fit the cover on the terminal block.
Fit the covers onto the water heater.
-
Communication cable to solar heating system
You must connect a communication cable between the controllers of the water heater and
the solar heating system.
1.
2.
3.
7.8.4
Connect the cables (X5 and X6) to terminals 23 and 24 as shown in the table (see
section 7.8).
Fit the cable in the strain relief.
If you have no more connections to make:
Fit the cover on the terminal block.
Fit the covers onto the water heater.
-
Electrical connection of the solar heating system
This section covers the following topics:
•
•
•
•
•
•
•
Preparation (see section 7.8.4.1);
Connecting the mains power (see section 7.8.4.2);
Connecting pump station - modulating pump (see section 7.8.4.3);
Connecting solar collector (see section 7.8.4.4);
Connecting tank sensor (see section 7.8.4.5);
Connecting communication cable (see section 7.8.4.6);
Connecting Q/T sensor (see section 7.8.4.7).
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
67
7.8.4.1
Preparation
Remove the cover (snap-on type) from the terminal block for the collector. This has the
following terminals:
7.8.4.2
Connecting the mains power
n
Note
Just as with the water heater controller, the solar heating system controller must have a
permanent electrical connection to the mains power supply. There must be a double-pole
isolator installed in the permanent connection. This is the same double-pole isolator as
installed between the mains power supply and the water heater itself. Whenever this
isolator is operated, both controllers can be switched on or off.
1.
2.
3.
4.
7.8.4.3
Connect earth, live and neutral to terminals 1 through 3
Fit the cables in the strain relief.
Connect the power cable to the isolator.
Continue (see section 7.8.4.3).
Connecting pump station - modulating pump
The pump station contains a modulating pump (PWM controlled). You must connect this
pump to the controller of the solar heating system.
1.
2.
3.
4.
7.8.4.4
Connect earth, live and neutral to terminals 10 through 12.
Connect PWM and PWM+ to point 1 and 2 of J18.
Fit the cables in the strain relief.
Continue (see section 7.8.4.4).
Connecting solar collector
n
Note
This sensor must be mounted in the solar collector;refer to the solar collector installation
manual.
Connect the sensor (S1) to the water heater as follows:
1.
2.
3.
7.8.4.5
Connecting tank sensor
n
68
Connect the sensor to terminal 2 and 4 of J13.
Fit the cables in the strain relief.
Continue (see section 7.8.4.5).
Note
This sensor is already mounted in the tank prior to delivery. The sensor is mounted
between the inlet and outlet of the heat exchanger. However, you must still connect the
lead to the solar heating system controller.
Installation, Maintenance and Service part
1.
2.
3.
4.
7.8.4.6
Connecting communication cable
n
Note
The communication cable must always be connected, otherwise neither the appliance nor
the solar heating system controller will run.
1.
2.
3.
4.
5.
7.8.4.7
Connect the double connector to J16.
Fit the cable in the strain relief.
Connect the other end of the communication cable to the terminal block of the
appliance. See
connecting communication cable to the appliance (see section 7.8.4.6).
electrical diagram for the appliance (see section 12.5).
electrical diagram for the solar heating system (see section 12.6).
Connect the optional Q/T-sensor (see section 7.8.4.7).
If you do not need to make any more connections:
Fit the cover over the controller.
Connecting Q/T sensor
n
Note
You can optionally add a Q/T sensor to the installation. This enables you to calculate the
energy contribution of the system. For more information or to order the Q/T sensor,
please contact your supplier.
1.
2.
3.
4.
5.
6.
7.9
Connect the lead for sensor S2 with the blade connectors to the sensor.
Connect the other end to terminals 2 and 4 of J14.
Fit the cables in the strain relief.
Continue (see section 7.8.4.6).
Connect the 5V to J12-1.
Connect sensor S4 to J12-2.
Connect earth to J12-3.
Connect the "flow signal" to J12-4.
Fit the cable in the strain relief.
If you have no more connections to make:
Fit the covers over the controller.
Commissioning
To commission the water heater:
1.
2.
3.
4.
Fill the water heater (see section 7.9.1)
Check the supply pressure (see section 7.9.2)
Check the gas control valve pressure
Measure the CO2 (see section 7.9.4)
5.
6.
Switch pressure measurement (see section 7.9.5)
Turn on the water heater (see section 7.9.6)
7.9.1
Filling
7.9.1.1
Filling unvented installations
Refer to the installation diagram when you fill the water heater:
1.
2.
3.
4.
5.
6.
Open the stop valve (11) in the hot water supply pipe.
If applicable, open the stop valves (4) of the circulation pipe (C).
Make sure that the drain valve (9) is closed.
Open the nearest hot water draw-off point (14).
Open the stop valve (4) of the cold water supply pipe (A). Cold water flows into the
water heater.
Fill the water heater until a full water jet flows from the nearest draw-off point. The
water heater is completely full.
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
69
7.
8.
7.9.1.2
Open all draw-off points to bleed the entire installation of air.
The water heater is now under water supply pressure.
Make sure that no water comes out of the expansion valve (15) or the T&P valve (3).
If water comes out:
Examine if the water supply pressure is greater than the specified value in the
Technical details. If necessary, install a pressure reducing valve (1).
Examine if the expansion valve in the protected cold supply set-up is installed
correctly and is not defect. If necessary, replace the expansion valve.
Filling vented installations
To fill the water heater, proceed as follows:
1.
2.
3.
4.
5.
6.
7.
7.9.1.3
Open the stop valve (11) in the hot water pipe and, if present, the stop valves (4) for
the circulation pump (6).
Close the drain valve (9).
Open the nearest hot water draw-off point (14).
Open the stop valve (4) on the cold water side (A) so that cold water flows into the
water heater.
Completely fill the water heater. When a full water jet flows from the nearest drawoff point, the water heater is full.
Bleed the entire installation of air, for example by opening all draw-off points.
The water heater is now under water supply pressure. There should now be no water
coming out of the inlet combination expansion valve or (if used) out of the T&P valve
(3). If there is, the cause might be:
The water supply pressure is greater than the specified value.
Rectify this by fitting a pressure reducing valve (1).
The expansion valve in the protected cold supply set-up is defective or
incorrectly fitted.
Filling the solar heating system
n
w
Note
No special safety measures are required when working with the diluted glycol solution
specified by the manufacturer. For more information about the fluid, please contact the
manufacturer.
Warning
Before filling the solar heating system to replenish the heating fluid, make
certain that:
• The appliance is switched off (see section 4.2).
• The solar heating system is switched off. Refer to the documentation of the
solar heating system.
• The appliance has cooled down sufficiently to prevent personal injury
(burns).
Note
The filling procedure described in this manual is intended for the pump system supplied
by the supplier of the appliance. For any other system, you should follow the procedure
for that system.
w
Warning
To avoid contaminating the glycol, you should flush the solar heating system through with
water before filling.
Flushing with water
1.
2.
3.
4.
5.
70
Connect a water supply to the filling point of the pump station.
Connect a drain hose to the drain point.
Open the taps of both supply and drain point.
Open the water supply tap.
Allow the system to spool through until no further contamination comes out of the
drain hose.
Installation, Maintenance and Service part
6.
7.
8.
Then shut off the water supply.
Drain all remaining water from the system.
Now you can fill the system with glycol.
Filling with glycol
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
n
Insert the hose of the glycol pump into the jerry can containing the glycol.
Connect the pump to the jerry can.
Connect the hose of the glycol pump to the inlet combination of the pump station.
Open the valve of the inlet combination.
Plug the glycol pump into a mains socket.
Start the glycol pump using the ON/OFF switch on the glycol pump.
Stop the glycol pump as soon as the pressure gauge on the pump station begins to
rise.
Completely bleed the system of air at the air bleed point (26, see installation
diagram).
Close the air bleed when no further air comes out.
Use the service menu to switch the pump on (see section 9.2.9.2).
Note
To ensure that the solar heating system is properly filled, the pump in the solar heating
system can be switched on for 2 minutes using the service menu.
11.
Repeat steps 6 through 9 until glycol runs out of the air bleed (26).
Note
If an installation does not have a drain-back system, then it should be filled up to
pressure (1.5 bar).
If an installation does have a drain-back system, then it should not be pressurised. For
the installation, filling and drainage of a drain-back system, please refer to the installation
manual and users manual of the solar collectors.
12.
13.
Switch off the glycol pump.
Close the valve of the inlet combination and disconnect the glycol pump (including
the hoses).
Note
Dispose of the residual glycol in the filler hose in an environment-friendly manner, and
according to local regulations.
7.9.2
Procedure for checking the supply pressure
To check the supply pressure, proceed as follows:
1.
2.
3.
4.
Isolate the appliance from the power supply (see section 4.2.2).
Carefully remove the covers from the appliance.
The electrical section is now visible.
There is a test nipple before the gas control valve (for natural gas appliances) or
before the pressure-reducing valve (for LPG appliances) so that the supply pressure
can be measured.
This test nipple has a sealing screw. Loosen the sealing screw by a few turns. Do not
completely loosen it as it can be difficult to retighten.
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
71
IMD-1095a R0
5.
6.
7.
8.
Open the gas supply and vent the gas supply line via the test nipple.
Connect a pressure gauge to the test nipple as soon as gas starts to flow from it.
Switch on the power to the appliance using the isolator on the appliance.
Switch the controller ON by setting the 0/I switch to position I.
The display will now show INTERNAL CHECK for about 10 seconds, and will then go
to the main menu.
9.
10.
Select SERVICE OPERATION, FULL LOAD from the service menu.
Confirm with [ENTER].
The display shown here will appear
11.
12.
n
IMD-1096a R0
The appliance is now in Full load mode and will ignite.
You must wait about 1 minute after the display shows the text RUNNING before
reading the dynamic pressures (the fan needs this time to get up to full speed, so
that you can get a reliable reading).
Use the pressure gauge to read the supply pressure and compare it against the value
from the gas table.
Note
Consult the mains gas supply company if the supply pressure is not correct.You cannot
yet start using the appliance. You must now take the appliance out of service (see section
4.2.2).
Note
After conversion, you must check that the gas control valve is gastight.
13.
14.
72
Shut off the gas supply.
Disconnect the pressure gauge and retighten the sealing screw in the test nipple.
Installation, Maintenance and Service part
15.
7.9.3
If there is nothing else you need to check or adjust, you can put the covers back on
the appliance.
Procedure for checking the gas control valve pressure
The procedure for checking the gas control valve pressure is only applicable to appliances
that have a pressure-reducing valve. If the appliance does not have a reducing valve,
continue from adjusting the CO2 value (see section 7.9.4).
To check the gas control valve pressure, proceed as follows:
1.
2.
3.
4.
5.
6.
7.
8.
7.9.3.1
Isolate the appliance from the power supply (see section 4.2.2).
Carefully remove the covers from the appliance.
The electrical section is now visible.
The gas control valve has a test nipple that can be used for measuring the gas
control valve pressure. This test nipple has a sealing screw. Loosen the sealing screw
by a few turns. Do not completely loosen it as it can be difficult to retighten.
Open the gas supply.
Connect a pressure gauge to the test nipple.
Switch on the power to the appliance using the isolator on the appliance.
Switch the controller ON by setting the 0/I switch to position I .
The display will now show INTERNAL CHECK for about 10 seconds, and will then go
to the main menu.
Procedure for checking the gas control valve pressure
1.
2.
3.
4.
5.
Select SERVICE OPERATION, FULL LOAD from the service menu.
Confirm with [ENTER].
The display shown here will appear.
The appliance is now in PARTIAL LOAD mode and will ignite.
You must wait about 1 minute after the display shows the text RUNNING before
reading the dynamic pressures (the fan needs this time to get up to full speed, so
that a reliable reading can be obtained).
Use the pressure gauge to read the pressure and compare it against the value from
the gas table.
If necessary, adjust the gas control valve pressure using the reducing valve's
adjuster screw (2) until the value is within the range listed in the table.
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
73
Fig. Gas control valve pressure adjustment
IMD-1096b R0
7.9.4
CO2 adjustment
To check the CO2 value under full load and partial load and to adjust it if necessary,
proceed as follows:
1.
2.
3.
4.
5.
6.
7.
8.
9.
Isolate the appliance from the power supply (see section 4.2.2).
Carefully remove the covers from the appliance.
The electrical section is now visible.
Place the CO2 meter's measurement probe in the test nipple (58) of the flue gas
outlet pipe (the number is a reference on the General working principle of the water
heater (see section 5.1)).
Open the gas supply and vent the gas supply line.
Use the main switch to apply mains voltage to the appliance.
Start the appliance (see section 4.1).
Go to the [
] SERVICE OPERATION menu.
Generate a heat demand by draining the appliance until it is cold or by raising the
value for Tset in the SERVICE menu. Use [ ] for this.
Full load measurement
10.
From the service menu, select:
SERVICE OPERATION | FULL LOAD
Confirm with [ENTER].
The appliance is now in FULL LOAD mode and will ignite.
11.
The appliance is now running at FULL LOAD. Read the value from the CO2 meter
12.
and wait until this measured value has remained stable for some time. This may take
several minutes.
Then compare the measured CO2 value against the value from the table.
The CO2 value at full load must be within ±1.0 vol% of the CO2 value stated in the
13.
table.
If necessary, adjust the CO2 value using the adjuster screw until the value is within
the range listed in the table of CO2 values.
Use the Allen key supplied for this. The key can be found in the plastic bag that is
attached to the appliance.
74
Installation, Maintenance and Service part
Fig. CO2 adjustment (full load)
IMD-1095b R0
n
Note
Turning to the left (anticlockwise) means more gas (higher CO2 level) and turning to the
right (clockwise) means less gas (lower CO2 level).
Note
Note
After conversion, you must check that the gas control valve is gastight.
14.
If you have increased Tset, set it back to the original value using [ ].
15.
Continue with the CO2 measurement under partial load.
Partial load measurement
16.
From the service menu, select:
SERVICE OPERATION | PARTIAL LOAD
Confirm with [ENTER].
The appliance is now in PARTIAL LOAD mode and will ignite
17.
The appliance is now running at PARTIAL LOAD. Read the value from the CO2 meter
18.
and wait until this measured value has remained stable for some time. This may take
several minutes.
Compare the CO2 value measured against the value measured under full load.
The CO2 value at partial load must be within ±0.3 vol% of the CO2 value measured
19.
or adjusted under full load.
If necessary, adjust the CO2 value using the adjuster screw until the value is within
0.3 vol% of the CO2 value under full load.
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
75
Fig. CO2 adjustment (partial load)
IMD-1095c R0
n
Note
Turning to the left (anticlockwise) means more less (lower CO2 level) and turning to the
right (clockwise) means more gas (higher CO2 level).
Note
After conversion, you must check that the gas control valve is gastight.
7.9.5
20.
Remove the CO2 measurement probe from the measurement nipple of the flue gas
21.
22.
23.
outlet pipe.
Put the cap back on the measurement nipple of the flue gas outlet pipe.
Shut off the gas supply.
Replace the covers.
Switching pressure measurement
To measure the switching pressure, proceed as follows:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
n
Check whether the measured value matches the value from the table.
Note
If the message PRESSURE SWITCH does not appear, there is a fault. This must be
resolved first by a qualified service engineer.
12.
13.
14.
76
Isolate the appliance from the power supply (see section 4.2.2).
Carefully remove the covers from the appliance.
The electrical section is now visible.
Remove the black caps from the measurement point of the pressure switch.
Connect the + of the pressure gauge to the H of the measurement point of the
pressure switch.
Connect the - of the pressure gauge to the L of the measurement point of the
pressure switch.
Zero the pressure gauge.
Start the appliance (see section 4.1).
The appliance will now run the heating cycle (see section 4.1.1).
Read the pressure from the meter at the moment when the appliance switches from
PRE PURGE to PRESSURE SWITCH. At this point, the appliance's display will show:
Shut off the gas supply.
Disconnect the pressure gauge.
Put the two black caps back on the pressure switch.
Installation, Maintenance and Service part
15.
7.9.6
Replace the covers.
Turn on the water heater
Refer to the procedure in the user part to Turn on the water heater (see section 4.1).
7.10
Decommisioning
To decommission the water heater:
1.
2.
7.10.1
Turn off the water heater (see section 7.10.1)
Drain the water heater
Turn off the water heater
Refer to the procedure in the user part to Turn off the water heater (see section 4.2) and
isolate the water heater from the mains power supply.
7.10.2
Draining
7.10.2.1
Draining unvented installations
Some service activities require the water heater to be drained. The procedure is as
follows:
c
1.
Activate the MENU with [
2.
3.
4.
Position the cursor in front of OFF.
Confirm OFF with [ENTER].
Wait until the fan has stopped. The
icon is then dimmed.
Caution
Failure to wait until the fan stops can cause damage to the water heater.
5.
6.
7.
8.
9.
10.
7.10.2.2
].
Switch the water heater OFF (position 0) using the control switch on the operator
interface.
Isolate the water heater from the power supply by setting the isolator between the
water heater and the mains power supply to position 0.
Shut off the gas supply (10).
Close the stop valve (11) in the hot water pipe.
Close the supply valve (4) in the cold water inlet (A).
Open the drain valve (9).
Draining vented installations
Some service activities require the water heater to be drained. The procedure is as
follows:
1.
2.
3.
4.
c
Activate the MENU with [
].
Position the cursor in front of OFF.
Confirm OFF with [ENTER].
Wait until the fan has stopped. The icon
is then dimmed.
Caution
Failure to wait until the fan stops can cause damage to the water heater.
5.
6.
Switch the water heater OFF (position 0) using the control switch on the operator
interface.
Isolate the water heater from the power supply by setting the isolator between the
water heater and the mains power supply to position 0.
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
77
7.
8.
9.
10.
11.
7.10.2.3
Draining the solar heating system
n
c
w
Note
No special safety measures are required when working with the diluted glycol solution
specified by the manufacturer. For more information about the fluid, please contact the
manufacturer.
1.
Activate the MENU with
2.
3.
4.
Position the cursor in front of OFF.
Confirm OFF with [ENTER].
n
.
Wait until the fan has stopped. The icon
is then dimmed.
Caution
Failure to wait until the fan stops can cause damage to the water heater.
Warning
The fluid in the pipes and the pipes themselves can be extremely hot! You should
therefore wait until the water heater has cooled down sufficiently.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
78
Shut off the gas supply (10).
Close the stop valve (11) in the hot water pipe.
Close the stop valve (4) between the cold water head tank and the cold water inlet
(A).
Open the drain valve (9).
Bleed the water heater (or installation) so that it drains completely.
Switch off the solar heating system.
Connect a hose to the lowest drain point in the solar heating system.
Insert the hose into the glycol jerry can.
Open the valve of the lowest drain point.
Open the air bleed point (26) of the solar heating system.
Close the drain point when the jerry can is full.
Insert the hose in a new jerry can.
Repeat steps 6 and 7 until no further glycol comes out of the system.
Close the air bleed point and the valve of the drain point.
Remove the hose.
Note
Dispose of the drained glycol in an environment-friendly manner, and according to local
regulations.
Installation, Maintenance and Service part
8
Conversion of gas type
c
Caution
Conversion of the water heater may only be carried out by a qualified person.
Use a special conversion kit to converse the water heater when:
•
•
The water heater has to operate on a different family of gases (liquid petroleum gas
or natural gas).
The water heater has to operate on a gas category other than that for which the
water heater has been configured at the factory.
You can order the conversion kit you need from the supplier of your water heater. The
conversion kit contains all the parts needed to do the conversion and a description of how
to do the conversion.
The following conversions are possible:
•
•
•
c
Conversion from natural gas to LPG.
Conversion from LPG to natural gas.
Conversion from natural gas to natural gas.
Caution
After the conversion, make sure that the water heater is gas-tight. Make sure that the
supply pressure, the gas control valve pressure, the CO2 value and the switching pressure
have the correct value.
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80
Installation, Maintenance and Service part
9
Settings
9.1
Operator interface
The operator interface is completely menu-driven and enables the user to change settings
and to verify the status and history of the water heater.
For more information about how to use the operator interface, refer to Operator interface
(see section 3).
9.2
Service program
The service program is used by the installation engineer or service and maintenance
engineer for:
•
•
•
•
•
•
•
•
•
•
Displaying the water heater history;
Displaying the error history;
Displaying the water heater history;
Display the selected water heater;
Switching the pump on or off;
Setting the service interval;
Service mode;
Setting legionella prevention;
Solar heating system configuration;
Setting the central heating configuration.
These sub-menus are briefly described in the following paragraphs.
n
Note
The notation convention for the service menu is identical to that of the main menu (see
section 4.3.1). The difference is, you use to bring up the service program, instead of
which brings up the main menu.
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9.2.1
Hysteresis
The water heater does not start immediately when the water temperature is below the
temperature setpoint. To prevent that the water heater switches on and off too often,
there is a margin; the hysteresis.
Call up the menu to set the hysteresis as follows:
•
[
]: HYSTERESIS DOWN
Please refer to the table (see section 12.1) for the regulation interval and settings for each
water heater.
9.2.2
Display the error history
Display the error history as follows:
•
[
]: ERROR HISTORY
The controller will display an overview of "Blocking errors" and "Lock out errors". In both
cases, note that the controller reserves 15 lines for the last 15 error messages. If there
are fewer than 15 error messages, an ellipsis (...) is displayed. The display first shows the
"Blocking errors". When [ENTER] is pressed, the "Lock out errors" are then displayed.
The figure shows an example of "Blocking errors". In this case, the text ERROR HISTORY is
followed by (B).
The figure shows an example of "Lock out errors". In this case, the text ERROR HISTORY is
followed by (L).
n
9.2.3
Note
For an overview of all errors and the possible causes, please refer to the relevant chapter
(see section 11.1).
Display the water heater history
The water heater history sub-menu is used to display the burning hours, the number of
ignitions, the number of flame errors and the number of ignition errors.
Call up the menu for displaying the water heater history as follows:
•
82
[
]: APPLIANCE HISTORY
The figure shows an example.
Installation, Maintenance and Service part
9.2.4
Display the selected water heater
Call up the menu for displaying the water heater selection as follows:
•
9.2.5
[
]: SELECT APPLIANCE
The water heater number can be found on the rating plate.
The water heater selection has been correctly preset in the factory.
Switch the pump on or off
If a program-controlled pump (see section 7.8.3.2) is installed, it can be switched ON or
OFF as follows:
•
[
]: PUMP RELAY
The standard setting for the pump relay is OFF.
If the mode WEEK PROGRAM or EXTRA PERIOD is active, then the setting for mode WEEK
PROGRAM or EXTRA PERIOD has priority over the ON/OFF selection for the pump relay in
the service menu.
Example
One of the week program periods is currently active. During this period, the pump relay
setting is OFF. If the pump relay is set ON in the service menu, the pump will nonetheless
remain OFF. The pump will only switch ON once the week program period has ended.
9.2.6
Setting the service interval
The service interval is a feature of the controller to help the service and maintenance
engineer set the frequency of maintenance.
The service interval is determined by the number of months that the appliance has been
running. This can be set to 6, 9 and 12 months. The default service interval is 12 months.
When the preset number of months has been reached, an appropriate message will appear
(see section 3.6.3).
Set the service interval as follows:
•
[
]: SERVICE INTERVAL
To erase the message SERVICE REQUIRED, refer to Finalization (see section 10.5).
9.2.7
Service mode
The Installation engineer uses the SERVICE OPERATION menu to adjust the water heater
CO2 setting during FULL LOAD and PARTIAL LOAD operation.
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83
Use [
]:SERVICE OPERATION to display the SERVICE OPERATION menu.
[ ] and [ ] can be used to switch between PARTIAL LOAD and FULL LOAD.
If there is a heat demand, the water heater will first run through a startup cycle, then
continue to operate in FULL LOAD or PARTIAL LOAD mode.
If there is no heat demand, the installation engineer must create one. This can be done by
draining the water heater until it is cold or by temporarily raising the set point using [ ].
After adjustment, the set point must be set back to the original value using [ ].
if you exit the SERVICE OPERATION menu or if no buttons are pressed for a period of 15
minutes, the water heater will revert to the original operating mode.
Temporarily raising the setpoint during FULL LOAD or PARTIAL
LOAD
1.
[
2.
Select FULL LOAD or PARTIAL LOAD.
The example below describes the situation for FULL LOAD, which is identical to that
for PARTIAL LOAD.
Confirm with [ENTER].
3.
9.2.8
]:>:SERVICE OPERATION.
4.
To create a heat demand, you can temporarily raise the set point using [ ] to e.g.
70ºC.
5.
6.
Confirm with .[ENTER].
After adjusting for the CO2 value (see section 7.9.4), you must use [ ] to restore
7.
the set point to its original value.
] twice to return to the MENU menu via the SERVICE OPERATION menu.
Press [
Setting legionella prevention
To prevent infection with legionella bacteria, the water heater heats the water to 65 °C
once per week, for 1 hour. This period is adjustable. By default, this period is set to
Monday from 02:00 to 03:00 hours.
84
Installation, Maintenance and Service part
9.2.8.1
Switching legionella prevention on and off
To switch legionella prevention on or off, select:
9.2.8.2
•
[
]: ANTI LEGIONELLA
•
•
Select NO to switch legionella prevention off.
Select YES to switch legionella prevention on. The following screen appears:
•
Select START to activate the period currently displayed.
The following display appears. This display indicates that legionella prevention is
switched on.
Changing legionella prevention start time
If you wish to change the start time, select:
•
[
]: ANTI LEGIONELLA | YES | Change
The following display appears.
•
Now set the day and time the same way as described for setting an extra period in
the week menu (see section 4.3.9). In this case however, the pump will be
automatically started.
Select START to start.
•
9.2.9
Solar heating system configuration
Use the solar heating system settings menu to reach the menus shown here:
9.2.9.1
Setting the drain-back tank
Use this menu to specify whether the solar heating system is equipped with a drain-back
tank for the heating fluid. Call up the menu as follows:
•
[
]:SETTINGS SOLAR | DRAIN BACK.
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85
The default is NO.
n
9.2.9.2
Note
During commissioning, it is important to check whether this setting corresponds with the
configuration of the solar heating system.
Switching on the solar pump
This menu lets you switch on the pump in the solar heating system manually. Call up this
menu as follows:
•
[
]: SETTINGS SOLAR | TEST SOLAR PUMP.
The following display appears.
When START is selected, the pump will start to run for two minutes. Once the 2 minutes
have elapsed, the pump stops running again.
9.2.9.3
Setting the solar limit
The solar limit temperature is the maximum water temperature obtained in the appliance
via the solar heating system (measured by sensor T1).
This value can be set between 65 and 80 °C. The default value is 65 °C.
If you set the solar limit higher than the set point (see section 4.3.3), then the solar pump
will be started in order to heat the water further once the set point has been reached.
However, this only makes sense if the solar heating system is actually generating heat.
This makes use of the difference between the temperature at the top of the solar collector
(S1) and that in the appliance (measured by S2).
Call up the menu for the solar limit as follows:
•
[
]: SETTINGS SOLAR | SOLAR LIMIT.
Please refer to the table (see section 12.1) for the adjustment range and default value for
each appliance.
9.2.9.4
Setting the solar difference
The solar difference is a value that influences how the operating cycle of the water heater
proceeds. Call up the menu as follows:
•
[
]: SETTINGS SOLAR | SOLAR DIFFERENCE.
Please refer to the table (see section 12.1) for the regulation interval and default value for
each water heater.
86
Installation, Maintenance and Service part
9.2.9.5
Setting the Q/T sensor
The energy contribution of the solar heating system can be calculated (see section
9.2.9.6) using the Q/T sensor. This calculation is only possible if your installation is
equipped with such a Q/T sensor. If this is the case, then you must set this value to YES,
otherwise NO. Call up the corresponding menu as follows:
•
9.2.9.6
[
]: SETTINGS SOLAR | Q/T SENSOR.
Displaying contribution
This option enables you to read out how much energy the solar heating system supplies.
For this data to be displayed, the installation must be equipped with a Q/T sensor (see
section 9.2.9.5).
Three values are reported on the display:
•
•
•
ACTUAL, actual energy: the amount of energy currently being supplied.
LAST 24hr, energy supplied over last 24 hours.
TOTAL, total energy supplied since day 1.
Call up this menu as follows:
•
9.2.9.7
[
]: SETTINGS SOLAR | CONTRIBUTION.
Displaying temperatures
This option lets you read what the solar heating system's sensors are recording. Two
values are reported on the display:
•
•
S1, temperature in the collector.
S2, temperature between the inlet and outlet of the heat exchanger in the tank.
Call up this menu as follows:
•
9.2.10
[
]: SETTINGS SOLAR | TEMPERATURES.
Setting the central heating configuration
Use this menu to specify whether a central heating system is connected to the installation.
n
Note
This function is not yet available.
•
[
]: SETTINGS HEATING.
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Installation, Maintenance and Service part
10
Maintenance
The water heater needs maintenance at least once a year. The maintenance interval is
determined by the water quality, the average burning time each day and the set water
temperature.
On the operator interface, the maintenance interval can be set as a reminder. The display
shows SERVICE REQUIRED when the pre-set interval has elapsed.
To determine the correct interval, Lochinvar recommends to do a system check on both
the water and the gas side, three months after installation.
n
Note
Do maintenance to maintain an effective and efficient transfer of heat to the water. This
significantly increases the service life of the water heater.
Note
When needed, spare parts can be ordered. To be sure that you receive the correct spare
parts, look at the data plate for the full serial number, the water heater model, and the
used gas category. Use this information when you order the spare parts.
Do the following maintenance activities:
•
•
•
•
•
10.1
Preparation (see section 10.1)
Water side maintenance (see section 10.2)
Gas side maintenance (see section 10.3)
Solar collector maintenance (see section 10.4)
Finalization (see section 10.5).
Preparation
To test whether all components are still working properly, complete the following steps:
c
1.
2.
3.
Activate the MENU with [
].
Use [ ] and [ ] to place the cursor beside OFF.
Confirm OFF with [ENTER].
4.
Wait until the fan has stopped. The icon
is then dimmed.
Caution
Failure to wait until the fan stops can cause damage to the water heater.
5.
6.
Switch the appliance OFF (position 0) using the control switch on the operator
interface.
Switch the controller ON by setting the control switch to position I.
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89
The display will now show INTERNAL CHECK for about 10 seconds, and will then go
to the main menu.
7.
8.
Activate ON mode by going through the following steps:
Press once on the blue arrow [ ] to position the cursor beside ON, then press
[ENTER].
Confirm the selection START OPERATION with [ENTER].
If there is no heat demand, then raise Tset. (see section 4.3.3) Note the original
9.
10.
setting. Draw some hot water off to create heat demand.
Check whether the heating cycle runs correctly (see section 4.1.1).
If you have adjusted Tset , return it to the original value (see section 4.3.3).
11.
12.
13.
14.
15.
16.
17.
10.2
Remove the plastic cover on the top of the appliance.
Check the supply and burner pressures (see section 7.9.2) and adjust them where
necessary.
Check that all components of the chimney flue system are properly attached.
Check the pressure differential across the pressure switch (see section 7.9.5) and, if
this is too low, the heat exchanger should be cleaned (see section 10.3.2).
Test the operation of the overflow valve of the protected cold supply setup. The
water should spurt out.
Check the drainage pipes from the discharge points of all valves and remove any
scale deposits that may be present.
Drain the water heater, see draining (see section 7.10.2).
Water-side maintenance
To do water side maintenance:
•
•
10.2.1
Descale the tank (see section 10.2.1)
Clean the condensate drain (see section 10.2.2)
Descale the tank
Scale and lime build-up prevent effective conduction of the heat to the water. Periodic
cleaning and descaling prevents build-up of these deposits. This increases the service life
of the water heater, and also improves the heating process.
Take the rate of scale formation into account when deciding on the service interval. Scale
formation depends on the local water composition, the water consumption and the water
temperature setting. A water temperature setting of maximum 60°C is recommended for
the prevention of excessive scale build-up.
To guarantee a good, watertight seal around the cleaning opening, replace the gasket,
washers, bolts and, if necessary, the lid with new parts before reassembly (see the figure).
A special set is obtainable from the supplier/manufacturer.
To simplify descaling and cleaning of the tank, the water heater is equipped with two
cleaning openings.
90
Installation, Maintenance and Service part
Fig. Cleaning opening
1
IMD-0080 R1
1.
2.
3.
4.
5.
6.
10.2.2
Remove the cover plate (1) on the outer jacket (see the figure).
Undo the bolts.
Remove the cover and the gasket.
Inspect the tank and remove the loose scale deposits and contamination.
If the scale cannot be removed by hand, descale the water heater with a descaling
agent. Contact the supplier/manufacturer for advice on what descaling agent to use.
Close the cleaning opening. To avoid damage to the tank, tighten the bolts that
fasten the lid with a torque no greater than 50 Nm. Use suitable tools for this.
Clean the condensate drain
To prevent blockages, it is essential to clean the condensation water discharge and
condensation trap regularly.
10.3
Gas-side maintenance
Do gas side maintenance when the water heater does not operate correctly, the air
pressure differential is not correct and/or the CO2 value is not correct.
To do gas side maintenance:
•
•
10.3.1
Clean the burner (see section 10.3.1)
Clean the heat exchanger (see section 10.3.2)
Clean the burner
1.
2.
3.
10.3.2
Detach the burner.
Remove all contamination present on the burner.
Fit the burner.
Clean the heat exchanger
1.
2.
3.
4.
5.
6.
n
Detach the burner.
Clean the combustion chamber of the heat exchanger using a vacuum cleaner and a
soft brush.
Detach the chimney flue.
Clean the end of the heat exchanger using tap water.
Fit the burner.
Fit the chimney flue.
Note
Check the pressure differential again after cleaning. If the pressure differential is too low
following cleaning, please contact the supplier of the water heater.
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10.4
Solar collector maintenance
See installation or users' manual for the solar collector. If this topic is not covered in the
manual, then contact the supplier of the collectors.
10.5
Finalization
To finalize the maintenance, carry out the following steps:
1.
2.
3.
Fill the water heater (see section 7.9.1).
Start the water heater (see section 4.1).
Check the CO2 value (see section 7.9.4).
4.
5.
Check the switching pressure of the pressure switch (see section 7.9.5).
Erase the message SERVICE REQUIRED. The displayed message can be reset in
either of two ways:
Temporary reset: To postpone the message, press once. The message will
reappear on the display 7 days later.
Full reset: To fully reset the message, press and hold both and at the same
time for 5 sec.
On completion of the full reset of the message, the message below will appear on the
display. This message will NOT be shown after a temporary reset of the message.
92
Installation, Maintenance and Service part
11
Troubleshooting
11.1
Errors and warnings
The water heater can have three different kinds of errors and warnings:
n
•
•
General errors, which are not displayed
Displayed errors, which are divided in two different groups:
Lock out errors: when the cause is removed, you can reset the error to resume
operation. The displayed code and the back-light of the display blink.
Blocking errors: when the cause is removed, the error resets automatically to
resume operation. The code is displayed continuously and the back-light of the
display blinks.
Errors are reported on the display as follows:
Line one: an error code and a brief description. The code consists of a letter
and two digits.
Lines two, three and four: a long description, alternating with a recommended
action. See the figures. The first shows a possible error, the second shows the
appropriate checking action.
•
Displayed warnings
Note
It is possible to view the error history of the water heater, refer to Error history (see
section 9.2.2).
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11.1.1
General errors
n
Note
For the coding of the connections, refer to the Electrical wiring diagram.
Indication
Cause
Measure
Gas smell
There is a gas leak
•
•
•
•
•
The display is off
The water heater is off.
Turn on the water heater (see section 4.1).
There is no supply voltage.
Make sure that:
• the control switch is set to I.
• the isolator is in ON position.
• there is power on the isolator.
• there is power to the electrical connector
block.
Close the mains gas valve at once.
Do not operate any switches.
No naked flames.
Ventilate the boiler room.
Immediately contact your installation
engineer or your local gas company.
The measured voltage must be
230 VAC (-15%, +10%).
Water leakage
Defective fuse(s)
Replace the fuse(s).
There is a leakage from a threaded
water connection.
Tighten the threaded connection.
There is a condensate leakage
Make sure that the condensation water
discharge is working properly.
If necessary, correct the water discharge.
There is a leakage from another nearby
water heater or pipe segment.
Trace the leakage.
There is a leakage from the water heater Contact the supplier of your water heater.
tank.
Explosive ignition
94
The gas supply pressure is incorrect.
Check the gas supply pressure, refer to Gas
supply pressure.
The CO2 value is incorrect.
Check the CO2 value, refer to CO2 value.
The burner is contaminated.
Clean the burner, refer to Gas-side
maintenance (see section 10.3).
There is an air leakage between the
venturi and the flexible air connector.
Make sure that:
• the flexible air connector is not damaged.
If necessary, replace the flexible air
connector.
• the flexible air connector is correctly
connected to the venturi.
If necessary, tighten the clamp.
Installation, Maintenance and Service part
Indication
Cause
Measure
Insufficient or no hot
water
The water heater is off.
Turn on the water heater (see section 4.1).
There is no supply voltage.
Make sure that:
• the control switch is set to I.
• the isolator is in ON position.
• there is power on the isolator.
• there is power to the electrical connector
block.
The measured voltage must be
230 VAC (-15%, +10%).
Glycol leakage
11.1.2
The hot water supply is used up.
Reduce the hot water consumption. Wait
until the water heater heats up.
The controller is in the OFF mode.
Set the controller in the ON mode.
The temperature (Tset) is set too low.
Set the temperature (Tset) to a higher value.
Leakage from a fluid connection
(threaded)
Tighten the threaded connection.
Leakage from a component
1. Tighten component joints
2. Any defective components must be
replaced
Leakage from solar heating system
Consult the supplier and/or manufacturer
Displayed errors
n
Note
For the coding of the connections, refer to the Electrical wiring diagram.
Note
Contact your service and maintenance engineer if the error persists.
Code and description
Cause
Measure
S01 (blocking error)
Sensor is not (correctly) connected
Connect the sensor lead to JP3
Open circuit from
temperature sensor T2 at
Damaged cable and/or defective sensor
Replace the cable and/or sensor
Sensor is not (correctly) connected
Connect the sensor lead to JP5
the bottom of the tank.
S02 (blocking error)
Open circuit from sensor 1 Damaged cable and/or defective sensor
of temperature sensor T1
Replace the cable and/or sensor
at the top of tank(1).
S03 (blocking error)
Sensor is not (correctly) connected
Open circuit in sensor 2 of Damaged cable and/or defective sensor
temperature sensor T1 at
Connect the sensor lead to JP5
Replace the cable and/or sensor
the top of the tank (1).
S04 (blocking error)
Dummy is not (correctly) connected
Open circuit from
dummy 1.
Connect the dummy sensor (dummy sensor
1 and 2) leads to JP4.
Defective dummy
Replace the dummy sensor
S05 (blocking error)
Dummy is not (correctly) connected
Open circuit from
dummy 2
Connect the dummy sensor (dummy sensor
1 and 2) leads to JP4.
Defective dummy
Replace the dummy sensor
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Code and description
Cause
Measure
S07 (blocking error)
Sensor is not (correctly) connected
Open circuit from
temperature sensor S2 at
Connect the sensor lead to J14 (ports 2 and
4) of the solar controller
Damaged cable and/or defective sensor
Replace the cable and/or sensor
S08 (blocking error)
Sensor is not (correctly) connected
Open circuit from
temperature sensor S1 in
Connect the sensor lead to J13 (ports 2 and
4) of the solar controller
Damaged cable and/or defective sensor
Replace the cable and/or sensor
Short circuit in sensor circuit
Replace the cable and/or sensor.
Short circuit in sensor circuit
Replace the cable and/or sensor.
Short circuit in sensor circuit
Replace the cable and/or sensor.
Short circuit in sensor circuit
Replace the cable dummy sensor (2).
Short circuit in sensor circuit
Replace the cable dummy sensor (2).
Short circuit in sensor circuit
Replace the cable and/or sensor
Short circuit in sensor circuit
Replace the cable and/or sensor
Live and neutral connected wrong way
around.
Be sure to connect the live and neutral
correctly (see section 7.8); the water heater
is phase-sensitive
Condensation on the flame probe
• Disconnect the lead at the flame probe
• Ignite the water heater three times, with
an interrupted ionisation circuit
• Reconnect the ionisation lead to the
flame probe
• Ignite the water heater again
• The repeated ignition attempts will have
caused the condensation to evaporate
Floating neutral
Install an isolating transformer (see section
7.8.3.1)
the bottom of the tank.
the collector.
S11 (blocking error)
Short circuit in
temperature sensor T2 at
the bottom of the tank.
S12 (blocking error)
Short circuit in sensor 1 of
temperature sensor T1 at
top of tank(1)
S13 (blocking error)
Short circuit in sensor 2 of
temperature sensor T1 at
the top of the tank (1).
S14 (blocking error)
Short circuit from
dummy 1
S15 (blocking error)
Short circuit from
dummy 2
S17 (blocking error)
Short circuit from
temperature sensor S2 at
the bottom of the tank.
S18 (blocking error)
Short circuit from
temperature sensor S1 in
the collector.
F01 (blocking error)
Defect in power supply
circuit
96
Installation, Maintenance and Service part
Code and description
Cause
Measure
F02 (lock out error)
Defective motor and/or rotor.
• Check the motor and rotor
• Replace the fan if the motor or rotor is
defective.
• Reset controller
Damaged wiring
• Check the wiring between the fan and the
controller.
• If any wires are damaged, the wiring
harness must be replaced.
• Reset controller
Contaminated or blocked fan
• Check if the fan is dirty and repair it if
necessary.
• Check that the rotor can rotate freely
• Reset controller
Fan fails to run at correct
speed.
Because of a drop in the supply voltage, • Check the supply voltage, this must be
the fan will not run at the correct speed.
230 VAC(-15%, +10%)
• Reset controller
F03 (lock out error)
Damaged wiring/Open circuit
• Check the wiring between the pressure
switch and the controller
• If necessary, replace the wiring
Pressure switch not closing
• Check the speed of the fan.
• Check that the hoses on the pressure
switch and the air supply hose between
fan and burner are correctly fitted. Refit
them if necessary
• Check for cracks in the hoses on the
pressure switch and in the air supply
hose between fan and burner. If
necessary, replace the hoses.
• Check whether the chimney flue is
compliant.
• Check for blockage in the chimney flue.
Remove any blockage that may be
present
• Check for blockage in the condensation
water discharge.
Remove any blockage that may be
present.
• Measure the pressure differential across
the pressure switch.
See the table. If there is insufficient
pressure differential, clean the heat
exchanger. If the pressure differential is
acceptable, check that the pressure
switch is closing, using a multimeter
The pressure switch fails
to work correctly
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Code and description
Cause
Measure
F04 (lock out error)
No gas
• Open the main gas supply valve and/or
the manual gas supply valve before the
gas control valve
• Check supply pressure to the gas control
valve
• If necessary, restore the gas supply
Air in the gas pipes
Bleed the air out of the gas pipe (see
section 7.9.2) and measure the supply
pressure and burner pressure.
Defect in the hot surface igniter circuit
• Check that the hot surface igniter is
correctly connected (JP2).
• Check the wiring of the hot surface
igniter.
• Measure the resistance across the hot
surface igniter. This must lie between 2
and 10 Ohm (at room temperature).
• Check that the hot surface igniter lights
up during ignition.
• If necessary, replace the hot surface
igniter.
Defect in the ionisation circuit
• Check that the flame probe is correctly
connected (JP2)
• Check the wiring of the flame probe
• Measure the ionisation current. This must
be a minimum of 1.5 microA.
• If necessary, replace the wiring.
Supply voltage too low
Check the supply voltage, this must be 230
VAC(-15%, +10%)
Incorrect roof or wall flue terminal.
Recirculating flue gases.
• Check that the correct roof or wall flue
terminal has been installed (see section
7.7).
• If necessary, install the correct roof or
wall flue terminal.
• Check that the roof or wall flue terminal
discharges into a permitted area.
Damaged cable in contact with metal
surface or bent flame probe.
Check the wiring and the flame probe.
Replace the wiring and/or flame probe if
necessary.
Ceramic part of the flame probe is
broken/cracked.
• Check whether the ceramic part of the
flame probe is still intact, in the vicinity
of the air distribution plate of the burner.
• If not the flame probe must be replaced.
Defective gas control valves
• Check whether there is still burner
pressure present, after the gas control
valves have closed.
• Check whether a flame is still present,
after the gas control valves have closed.
• If this is the case, the gas control valve
must be replaced.
Three unsuccessful
ignition attempts.
F05 (lock out error)
Too many flame errors
have been signaled.
F06 (blocking error)
Short circuit between
flame probe and earth
F07 (lock out error)
A flame has been detected
after the gas control valve
was closed.
F08 (lock out error)
Flame detection before the gas control
Error message from safety valve opened.
relay
• Reset controller.
• If the error appears again, replace the
controller.
F09 (lock out error)
• Check that the circulation pump (if
present) is working
• Check the position of temperature sensor
T1
Water temperature
protection.
Temperature at the top of the tank
exceeds 93 ºC.
• Reset controller
98
Installation, Maintenance and Service part
Code and description
Cause
Measure
F11 (blocking error)
Defective gas control valves
See F07.
No power supply at solar controller
• Check that there is power to the solar
heating system controller
• 2. The measured voltage must be 230
VAC (-15%, +10%)
No cable or damaged cable
• Check the wiring (communication cable)
between the main controller and the solar
heating system controller
• If cable missing, connect the cable
• If cable damaged, replace the cable
Short circuit Q/T–sensor
Check whether the Q/T-sensor is connected
correctly to the controller.
Flame detection with
closed gas control valve.
F18 (blocking error)
Communication error
• Disconnect the Q/T-sensor.
• In case of disappearing communication
error, the Q/T-sensor must be replaced.
F19 (blocking error)
There is not enough supply voltage.
1. Check that there is power to the
controller
2. The measured voltage must be 230 VAC
(-15%, +10%)
Incorrect reference voltage from the AD
converter.
1. Reset controller.
2. Check that the frequency of the power
supply is compliant. If not, contact your
installation engineer
3. If the frequency is correct but the error
persists, replace the controller.
Power supply voltage is
too low.
C02 (lock out error)
Error message from the
controller.
Internal error message
from the controller.
• EEPROM read error
• 50 Hz error
• Internal communication error
Internal error message
from the controller.
•
•
•
•
•
•
C03 (blocking error)
Too many resets in too short a period
Wait for the error to disappear (maximum 1
hour). If the error does not disappear,
replace the water heater controller.
Incorrect water heater selection /
Incorrect selection resistor
1. Check whether the correct water heater
is selected.
2. If the correct water heater is selected, fit
the correct selection resistor.
3. If incorrect water heater selected, select
the correct one.
• Incorrect reference voltage from the
AD converter.
• EEPROM error
• Reset controller.
• Check that the frequency of the power
supply is compliant (see section 12.1). If
this is not the case, contact your
installation engineer.
• If the frequency is correct but the error
persists, replace the solar controller.
The temperature of the water at the top
of the tank is > 88 ºC.
None. This is a temporary message that
may appear from time to time, but will
disappear automatically.
Gas valve relay error
Safety relay error
Ignition relay error
RAM error
EEPROM error
EEPROM contents do not match the
software version
• Processor software error
Reset error
C04 (blocking error)
Appliance selection error
C05 (blocking error)
Error message from the
solar controller
E01 (blocking error)
The temperature
protection at the top of
the tank has been
activated.
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
99
Code and description
Cause
Measure
The two temperature sensors in the tank 1. Check sensor position and wiring.
detect a difference of > 10°C over a
2. Reset the controller if necessary. Replace
Error in temperature
the sensor if the error persists.
sensor T1 at the top of the period of at least 60 seconds.
E03 (lock-out error)
tank.
E04 (lock-out error)
Defect in the dummy
sensor(2).
11.1.3
The two temperature sensors detect a
difference of >10 ºC over a period of at
least 60 seconds.
1. Check the wiring of the dummy 1 and
dummy 2.
2. Reset the controller if necessary. Replace
the dummy sensor if the error persists.
Warnings
n
Note
For the coding of the connections, refer to the Electrical wiring diagram.
Indication
Cause
Remark
Maximum burning hours:
Service is required
The actual burning hours have exceeded The water heater operates, but displays this
the pre-set burning hours.
warning.
Periodic maintenance is a part of the
Warranty. When you do not obey this
condition, the warranty will void.
Anode protection is not
working
• The cables between the potentiostat
1. Connect the wiring correctly and the
and anodes are loose or have been
warning will disappear.
connected incorrectly.
2. If the wiring is correct but the warning
• The earth connection of the anodes is
remains, check that the earth connection
loose.
is good and whether the tank is filled with
• The water heater is not filled with
water.
water.
Note
The water heater is functioning, but there is
no anode protection for the tank.
n
Solar heating system
pump or Q/T sensor not
correctly connected
Lead(s) loosened or incorrectly
connected
1. Connect the pump or Q/T sensor properly
and the warning will disappear.
2. If correctly wired but the warning
remains, replace pump or sensor.
To replace the necessary parts, you must
contact your installation engineer
Q/T sensor not identified
Identification failed
1. Disconnect appliance and Solar Heat
Master briefly from the mains.
2. Check the wiring.
3. If disconnecting has not helped and the
wiring is okay, and the Q/T sensor still
isn't recognized, then the Q/T sensor or
the Solar Heat Master is defective.
100
Installation, Maintenance and Service part
Indication
Cause
Remark
Collector temperature too
high
Temperature S1 is greater than
1. You can let the message disappear
automatically by allowing the heating
fluid to cool down.
2. You can also manually eliminate the
message by pressing the RESET and
ENTER buttons simultaneously.
Tcollector max.
Non-drainback systems:
The solar systems pump runs at full power
for 10 minutes, pumping the fluid in the
solar system round. If Tcol > Tcollector max
after this has elapsed, the pump will stop
running for 30 minutes. After 30 minutes,
the pump will start running again and the
controller of the solar heating system checks
whether Tcol is less than Tcollector max.
Drain-back systems:
The solar system's pump stops running
immediately (for 30 minutes). After
30 minutes, the pump will start running
again and the controller of the solar heating
system checks whether Tcol is less than
Tcollector max.
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
101
102
Installation, Maintenance and Service part
12
Appendices
12.1
Technical details
Description
Unit
HWHC 44-370 HWHC 63-370
Contents
litres
377
377
Empty Weight
kg
245
245
Maximum floor load
kg
622
622
Maximum operating pressure (vented)
kPa (bar)
800 (8)
800 (8)
Maximum operating pressure (unvented)
kPa (bar)
550 (5.5)
550 (5.5)
Control thermostat - adjustment range
°C
40...80
40...80
Control thermostat - default value
°C
65
65
Hysteresis downwards - adjustment range
°C
2...12
2...12
Hysteresis downwards - default value
°C
5
5
Adjustment range for solar differential
°C
0...8
0...8
Solar differential default value
°C
3
5
Adjustment range for solar limit
°C
65...80
65...80
Solar limit default value
°C
65
65
Number of (electrical) anodes
-
2
2
Observed pressure differential across the pressure
switch
Pa
³ 165
³ 165
Pressure differential to open the pressure switch
Pa
£ 115
£ 115
Heating time ΔT = 45 °C
min.
15
11
Electrical power consumption of the appliance
W
60
120
Electrical power consumption of the solar controller
W
max. 700
max. 700
Supply voltage (-15%, +10% VAC)
volts
230
230
Mains frequency (± 1Hz)
Hz
50
50
IP class
-
IP 20
IP 20
General
Electrical
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
103
Description
Unit
HWHC 44-370 HWHC 63-370
Load profile
-
XXL
XXL
Energy Efficiency Class (Energy Label)
-
A
A
Energy Efficiency
%
90
92
Daily Electricity Consumption
kWh
0.259
0.260
Daily Fuel Consumption
kWh GCV
26.802
26.192
Mixed Water 40°C (V40)
ltr.
∞
∞
Additional Load Profile
-
-
-
Energy Efficiency
%
-
-
Daily Electricity Consumption
kWh
-
-
Daily Fuel Consumption
kWh GCV
-
-
Mixed Water 40°C (V40)
ltr.
-
-
Description
Unit
Value
Maximum mains pressure of cold water supply
(vented)
kPa (bar)
800 (8)
Maximum mains pressure of cold water supply
(unvented)
kPa (bar)
550 (5.5)
Maximum mains pressure of the protected cold supply kPa (bar)
setup
500 (5)
T&P overflow pressure
kPa (bar)
700 (7)
T&P overflow temperature
°C
97
104
Installation, Maintenance and Service part
12.2
Dimensions
Size
Description
Unit
HWHC 44-370 HWHC 63-370
A
Overall height
mm
2055
2055
C
Position on pallet
mm
490
490
D
Appliance diameter
mm
705
705
E
Depth
mm
925
925
F
Width
mm
850
850
G
Diameter of flue gas discharge
mm
100/150
100/150
H
Height of flue gas outlet/air supply
mm
2020
2020
Hx
x position flue gas outlet
mm
260
260
Hy
y position flue gas outlet
mm
370
370
K
Height of gas connection
mm
1960
1960
M
Height of cold water supply
mm
185
185
N
Height of hot water outlet
mm
2055
2055
Ny
y position of hot water outlet
mm
205
205
P
Height of cleaning opening
mm
365
365
R
Height of drain valve connection
mm
180
180
S
Height of T&P valve connection
mm
1555
1555
T
Height of coil inlet
mm
630
630
U
Height of coil outlet
mm
305
305
V
Height of recirculation connection
mm
1035
1035
W
Height of condensation drain
mm
765
765
X
Height of heat exchanger supply
mm
1465
1465
Y
Height of heat exchanger discharge
mm
855
855
Z
Height of electric element connection
mm
755
755
1
Cold water supply connection (external)
-
R 11/2
R 11/2
2
Hot water outlet (male)
-
R 11/2
R 11/2
3
Gas control valve connection (external)
-
R 3/4"
R 3/4"
4
Drain valve connection (internal)
-
3/ "
4
3/ "
4
5
T&P valve connection (female)
-
1"-11.5 NPT
1"-11.5 NPT
6
Cleaning/inspection opening
mm
95 x 70
95 x 70
7
Condensation drainage connection (female)
-
Ø 40
Ø 40
9
Coil inlet connection (female)
-
Rp 1
Rp 1
10
Coil outlet connection (female)
-
Rp 1
Rp 1
11
Electric element connection (female)
-
Rp 11/2
Rp 11/2
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
105
Size
Description
Unit
HWHC 44-370 HWHC 63-370
12
Heat exchanger supply connector (female)
-
Rp 1
Rp 1
13
Heat exchanger outlet connector (female)
-
Rp 1
Rp 1
14
Recirculation connection (female)
-
Rp 1
Rp 1
Fig. Dimensions HWHC
F
Hx
C
3
Hy
44º
E
Ny
4
2
5
6
45º
45º
D
G
2
3
12
5
A
N
14
H
K
S
11
13
X
9
7
V
6
P
M
Z
1
Y
10
T
W
U
4
R
IMD-0773 R0
106
Installation, Maintenance and Service part
12.3
Gas details
Description
Unit
HWHC 44-370 HWHC 63-370
Diameter of the venturi restrictor
mm
-
-
Nominal Load (gross)
kW
45.2
64.4
Nominal output
kW
43.5
61.5
Supply pressure
mbar
20
20
CO2 (full load)
vol%
9.0 ± 1.0
9.0 ± 1.0
O2 (full load)
vol%
4.8 ± 1.8
4.8 ± 1.8
Gas consumption (1)
m3/h
4.2
6.0
NOx-emission
mg/kWh GCV
29
31
Mass flow rate flue gases (minimal load)
kg/h
24.3
24.3
Mass flow rate flue gases (nominal load)
kg/h
72.0
102.6
Flue gas temperature (nominal load)
ºC
52
59
Diameter of the venturi restrictor
mm
6.00
6.00
Nominal Load (gross)
kW
44.2
63.0
Nominal output
kW
43.5
61.5
Supply pressure
mbar
37…50
37…50
Gas control valve pressure
mbar
12.0 ± 2.0
12.0 ± 2.0
CO2 (full load)
vol%
10.0 ± 1.0
10.0 ± 1.0
O2 (full load)
vol%
5.7 ± 1.8
5.7 ± 1.8
Gas consumption
kg/h
3.1
4.4
NOx-emission
mg/kWh GCV
35
36
Mass flow rate flue gases (minimal load)
kg/h
24.8
24.8
Mass flow rate flue gases (nominal load)
kg/h
73.6
104.8
Flue gas temperature (nominal load)
ºC
52
59
Gas category 2H (G20)
Gas category 3P (G31)
1 - Based on 1013.25 mbar and 15°C.
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
107
12.4
Week program card
You can cut the week program card out and keep it near the water heater.
Period
Day
1
ON
Time
Tset
Pump
... ºC
ON / OFF
... ºC
ON / OFF
... ºC
ON / OFF
... ºC
ON / OFF
... ºC
ON / OFF
... ºC
ON / OFF
... ºC
ON / OFF
... ºC
ON / OFF
... ºC
ON / OFF
... ºC
ON / OFF
... ºC
ON / OFF
... ºC
ON / OFF
... ºC
ON / OFF
... ºC
ON / OFF
... ºC
ON / OFF
... ºC
ON / OFF
... ºC
ON / OFF
OFF
2
ON
OFF
3
ON
OFF
4
ON
OFF
5
ON
OFF
6
ON
OFF
7
ON
OFF
8
ON
OFF
9
ON
OFF
10
ON
OFF
11
ON
OFF
12
ON
OFF
13
ON
OFF
14
ON
OFF
15
ON
OFF
16
ON
OFF
17
ON
OFF
108
Installation, Maintenance and Service part
18
ON
... ºC
ON / OFF
... ºC
ON / OFF
... ºC
ON / OFF
... ºC
ON / OFF
OFF
19
ON
OFF
20
ON
OFF
21
ON
OFF
Example
Period
Day
1
Time
Tset
ON
MO
14:30
OFF
MO
16:15
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
Pump
70 ºC
ON / OFF
109
12.5
Electrical wiring diagram
A
1
1
X
5
X
3
X J2
2
1
J33
3
J40
F3
F1
7
B
C
4
X
4
X
3
X
4
4
4
1
X
3
1
2
2
3
5
JP11
1
X
2
JP3
7
X
X
2
7
1
X
5
6
J35
2
5
JP6
J29
3
X
2
7
5
2
4
X
X
4
J36 X
1
2
3
J39
4
1
X
4
6
X
3
6
3
X
2
4
L
X
6
6
J37
O
P
1
Q
5
X
4
4
X
8
X
7
X
X
5
4
X
3
JP12
1
3
X
X
1
1
1
6
X
N
JP8
2
6
6
6
X
X
2
X
1
4
J34
1
3
1
6
X
4
4
2
6
JP5
X
1
2
1
3
I
9
8
1
6
J19
2
11
10
X
X
X
13
12
6
JP4
X
3
E
15
14
6
J21
1
X
1
D
X
16
6
3
X
N
6
J20
X
X
X
J38
4
1
2
1
2
JP2
5
X
2
1
X
X
6
4
5
6
4
1
3
X
S
6
2
1
R
6
2
5
T
M
0
2
1
U
4 7
2
1
3
1
2
N
L
3
1
2
4
3
5
2
6
8
4
4
3
2
L1
N
1
3
2
1
4
4
5
5
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
N
N
L2
H
L3
G
F
Secundair
Primair
AA
3
1
7
4
J
230VAC 50Hz
K
N
L
230VAC 50Hz
110
0309 686a R0
Installation, Maintenance and Service part
Cable colors:
1
Brown
2
Blue
3
Green
4
Black
5
White
6
Grey/Beige
7
Green
8
Yellow
Terminal strip connections:
A
Earth
N
Neutral
L
Live input of controller
L1
Live input of isolating transformer
(primary side)
L2
Live output of isolating
transformer (secondary side)
L3
Components:
A
Control
B
Flame probe
C
Hot surface igniter
J2
Power connection for controller
J19
Extra error signal connection
J20
Gas control valve connection
J21
Program-controlled pump
connection
D
Gas control valve
J29
Power connection for the fan
E
Burner earth connection
J36
Controller display connection
F
Extra ON mode switch
J40
Regulator connection for the fan
G
Program-controlled pump
JP2
(max. 100W)
H
Extra error signal connection
J
Isolating transformer
K
L
Temperature sensor T2 connection
Double-pole isolator
JP4
Dummy connection
Controller O/I switch
JP5
Display
N
Fan
O
Temperature sensor
(T2 - bottom of tank)
P
Q
Temperature sensor
R
Selection resistor
S
Push button
T
Electrical anodes
U
Signaling for electrical anodes
V
Potentiostat
Temperature sensor
T1 connection
JP6
Selection resistor and pressure
switch connection
JP8
Extra ON mode switch
connection
Dummy
(T2 - top of tank)
W
Flame probe and hot surface
igniter connection
JP3
M
Live input of program-controlled
pump
Controller connections:
F1
Fuse (T 3.15A - 250 V)
F3
Fuse (T 3.15A - 250 V)
Communication between the
appliance controller and the solar
system (BUS connection)
AA
Solar system controller
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
111
12.6
Electrical wiring diagram solar heating system
Cable colors:
Components:
Controller connections:
1
Brown
AA
Control
J12
2
Blue
BB[VAC]
Solar heating system pump
3
Green
4
Black
5
White
6
Grey/Beige
7
Green
8
Yellow
(modulating) (230 VAC)
BB [PWM] Solar heating system pump
(modulating) (PWM-signal)
CC
S1 (2-4)
J14
Connection of temperature sensor
S3 (1-3)
Temperature sensor (S2- tank)
EE
Combined Q/T sensor
(incl. temperature sensor S4–
J16
N
Neutral
L
Live input of controller
solar heating system controller
L3
Live input for the solar heating
(BUS-link)
Communication between the
Connection of BUS-link
communication
J18
Connection of PWM-signal solar
heating system pump
solar collector return)
FF
Connection of temperature sensor
S2 (2-4) and temperature sensor
Earth
PWM+
J13
(S1 - solar collector)
A
system modulating pump
T sensor (1-2-3-4)
Temperature sensor
DD
Terminal strip connections:
Connection of combined Q/
F2
Fuse (T 3.15A - 250 V)
water heater controller and the
K
Double-pole isolator
PWM+ control signal for
controlling solar heating system
modulating pump
PWM-
PWM- control signal for
controlling solar heating system
modulating pump
112
Installation, Maintenance and Service part
12.7
Menu structure
CONTROL
SERVICE
PROGRAM
HYSTERESE
MAIN MENU
OFF
HYSTERESE DOWN
ON
HISTORY
OF ERRORS
START OPERATION
CHANGE SETPOINT
APPLIANCE
HISTORY
SELECT
APPLIANCE
WEEKPROGRAM
START OPERATION
SERVICE INTERVAL
PROGRAM
OVERVIEW
SERVICE
OPERATION
EXTRA PERIOD
FULL LOAD
SETTINGS
PARTIAL LOAD
LANGUAGE
ANTI LEGIONELLA
DAY/TIME
SOLAR
CONFIGURATION
SPECIFICATIONS
DRAIN BACK
REGULATION INTERVAL
TEST SOLAR PUMP
IGNITION SPEED
SOLAR LIMIT
TEMEPRATURE
WORKING SPEED
SOLAR DIFFERENCE
Q/T-SENSOR
CONTRIBUTION
TEMPERATURES
HEATING
CONFIGURATIONS
HEATING CONNECTED
HEATING SETPOINT
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
113
12.8
114
Declaration of conformity
Installation, Maintenance and Service part
12.9
Warranty
Article 1: General warranty
If within 1 (one) year of the invoice date or commissioning date of a water heater supplied
by Lochinvar Ltd., following verification, and at the sole discretion of Lochinvar Ltd., an
assembly or part (with exclusion of the tank) proves to be defective or fails to function
correctly due to manufacturing and/or material defects, then Lochinvar Ltd. shall repair or
replace this assembly or part.
Article 2: Warranty
If within 3 (three) years of the invoice date or commissioning date of a water heater
supplied by Lochinvar Ltd., following verification, and at the sole discretion of Lochinvar
Ltd., the enamel-lined steel tank proves to be leaking due to rust or corrosion occurring on
the water side, then Lochinvar Ltd. shall offer to replace the defective water heater with an
entirely new water heater of equivalent size and quality The warranty period given on the
replacement water heater shall be equal to the remaining warranty period of the original
water heater that was supplied.
Article 3: Conditions for installation and use
The warranty set out in articles 1 and 2 will apply solely under the following conditions:
1.
2.
3.
4.
5.
6.
7.
8.
9.
The water heater is installed under strict adherence to Lochinvar Ltd. installation
instructions for the specific model, and must be in accordance with the relevant
requirements of the Gas Safety Regulations, Building Regulations, I.E.E. Regulations
and the byelaws of the local water undertaking. The installation should also be in
accordance with any relevant requirements of the local gas distributor and local
authority.
The water heater remains installed at the original site of installation.
The water heater is used exclusively with drinking water, which at all times can
freely circulate (a separately installed heat exchanger is mandatory for heating saline
water or corrosive water).
The tank is safeguarded against harmful scaling and lime build-up by means of
periodic maintenance.
The water temperatures in the heater do not exceed the maximum setting of the
thermostats, which form a part of the water heater.
The water pressure and/or heat load do not exceed the maximum values stated on
the water heater rating plate.
The water heater is installed in a non-corrosive atmosphere or environment.
The water heater is connected to a protected cold supply arrangement, which is:
approved by the relevant authority; with sufficient capacity for this purpose;
supplying a pressure no greater than the working pressure stated on the water
heater; and where applicable by a likewise approved temperature and pressure relief
valve, fitted in accordance with installation instructions of Lochinvar Ltd. applying to
the specific model of water heater, and further in compliance with Building
Regulations, local authority installation byelaws and the Water Supply (Water
Fittings) Regulations 1999.
The water heater is protected with an electrical powered anode that provides
cathodic protection at all times. The water heater is equipped with a powered anode,
which passes a small current from the electrode, immersed in the water, on to the
inner surface of the water heater. It is possible, over time, that the electrode rod
may become covered with a thin film that prevents sufficient current to flow, this can
be remedied by removing the film on the electrode rod with a clean cloth, do not use
abrasive cleaning products. It is a requirement, of the powered anode system, that
the water heater is connected to 230 v power supply. There must be no switches,
such as time control, in the main power supply other than the double-pole isolator.
Time control can be achieved by other means without interrupting the main power
supply. Incorrect installation of the main power supply will invalidate the warranty of
the water heater.
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
115
Article 4: Exclusions
The warranty set out in articles 1 and 2 will not apply in the event of:
10.
11.
12.
13.
14.
15.
damage to the water heater caused by an external factor;
misuse, neglect (including frost damage), modification and incorrect and/or
unauthorized use of the water heater;
contaminants or other substances having been allowed to enter the tank;
any attempts at repair to a defective water heater other than by an approved service
engineer;
the conductivity of the water being less than 125 μS/cm and/or the hardness
(alkaline earth ions) of the water being less than 1.00 mmol/litre;
unfiltered, recirculated water flowing through or being stored in the water heater.
Article 5: Scope of the warranty
The obligations of Lochinvar Ltd. pursuant to the specified warranty are limited to free
delivery from the warehouse of the replacement assemblies, parts or water heater,
respectively. Labor, installation and any other costs associated with the replacement will
not be accepted by Lochinvar Ltd.
Article 6: Claims
A claim on grounds of the specified warranty must be submitted to the dealer from whom
the water heater was purchased, or to another authorized dealer of Lochinvar Ltd..
Inspection of the water heater as referred to in articles 1 and 2 shall take place in one of
the laboratories of Lochinvar Ltd.
Article 7: Obligations of Lochinvar Ltd.
Lochinvar Ltd. grants no other warranty or guarantee over its water heaters nor the
(assemblies or parts of) water heaters supplied for replacement, other than the warranty
expressly set out in these conditions. Under the terms of the supplied warranty, Lochinvar
Ltd. is not liable for damage to persons or property caused by (assemblies or parts, or the
glass-lined steel tank of) a (replacement) water heater that it has supplied.
116
Installation, Maintenance and Service part
12.10
Detailed installation diagram
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
117
Legend:
1
EcoCharger Hybrid HWHC Water Heater
2
Solar Control
3
Flat Plate Solar Thermal Collector
4
Solar Pump Station
5
Class Two RHI Complaint Heat Meter
6
QT Flow Sensor
S1
Temperature Sensor Flat Plate Solar Thermal Collector
S2
Temperature Sensor Bottom EcoCharger Hybrid HWHC
AAV
Air Aeration Valve
DV
Drain Valve
EV
Expansion Valve
EXV
Expansion Vessel
HL
High Limit Stat
IV
Isolation Valve
LSV
Lockshield Valve
NRV
Non Return Valve
PMP
Pump
PRV
Pressure Reducing Valve
SEV
Solar Expansion Valve
TD
Tundish
TPRV
Temperature Pressure Relief Valve
TV
Tempering Valve
2PV
Motorised 2 Port Valve (via High Limit)
118
Installation, Maintenance and Service part
Index
Connecting solar collector................... 68
Connecting tank sensor...................... 68
Connecting the mains power............... 68
Contact information.............................5
Control switch...................................20
Conversion of gas type.......................79
Copyright........................................... 3
Copyright........................................... 3
D
Declaration of conformity..................114
Decommisioning................................77
Deleting times from a week program....34
Descale the tank............................... 90
Detailed installation diagram............. 117
Dimensions.....................................105
Display the error history.....................82
Display the selected water heater........ 83
Display the water heater history.......... 82
Displayed errors................................ 95
Displaying contribution.......................87
Displaying temperatures.....................87
Displaying water heater specifications.. 39
Disposal........................................... 52
Document identification....................... 8
Drain-back tank................................ 50
Draining........................................... 77
Draining the solar heating system........78
Draining unvented installations........... 77
Draining vented installations............... 77
A
About the water heater...................... 43
About this manual............................... 7
Adding times to a week program......... 33
Additional error signal........................ 67
Ambient conditions............................ 53
Anode warning.................................. 23
Appendices..................................... 103
B
Buttons............................................ 20
C
C13/C33 concentric systems............... 61
C13/C33 parallel systems................... 62
C43/C53/C63 systems....................... 64
Changing legionella prevention start time
...................................................... 85
Changing the appliance's standard week
program...........................................30
Circulation pipe................................. 56
Clean the burner............................... 91
Clean the condensate drain.................91
Clean the heat exchanger................... 91
CO###sub2### adjustment..............74
Cold water side............................56, 57
Collector temperature warning............ 23
Commissioning..................................69
Communication cable to solar heating
system.............................................67
Compliance........................................ 4
Condensation drain............................57
Conditions........................................ 53
Connecting communication cable......... 69
Connecting pump station - modulating
pump...............................................68
Connecting Q/T sensor....................... 69
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
E
Electrical connection of the solar heating
system.............................................67
Electrical connections.........................65
Electrical wiring diagram...................110
Electrical wiring diagram solar heating
system........................................... 112
Environmental aspects....................... 51
Error conditions.................................22
Errors and warnings...........................93
Expansion valve................................ 51
Expansion vessel............................... 51
Explanation of icons...........................19
External ON mode switch....................67
EXTRA............................................. 21
Extra period......................................35
119
Mains power..................................... 66
Maintenance..................................... 89
Maximum floor load........................... 53
Menu structure................................ 113
F
Fan................................................. 49
Filling.............................................. 69
Filling the solar heating system........... 70
Filling unvented installations............... 69
Filling vented installations...................70
Filling with glycol...............................71
Finalization....................................... 92
Flame probe..................................... 50
Fluid temperature..............................51
Flushing with water........................... 70
N
Notation conventions........................... 7
Notation conventions for menu-related
instructions...................................... 29
O
OFF................................................. 21
ON.................................................. 21
Operating cycle................................. 45
Operating modes...............................21
Operator interface........................81, 19
Optional electrical connections............ 66
G
Gas connection................................. 58
Gas control valve.............................. 49
Gas details..................................... 107
Gas-side maintenance........................91
General errors.................................. 94
P
Packaging.........................................53
PC connection................................... 21
Preface.............................................. 3
Preparation.......................................89
Preparation.......................................65
Preparation.......................................68
Pressure switch................................. 49
Procedure for checking the gas control
valve pressure.............................73, 73
Procedure for checking the supply
pressure...........................................71
PROG...............................................22
Program-controlled pump................... 66
Programming an extra period..............36
Protection for the solar heating system.50
Protection for the water heater............49
H
Hot water side............................. 56, 57
Hysteresis........................................ 82
I
Installation....................................... 53
Installation diagram...........................55
Installation, Maintenance and Service
part................................................. 41
Instructions on the water heater..........48
Interface.......................................... 19
Introduction................................ 43, 15
Isolate from the mains....................... 27
Isolating transformer......................... 66
Q
Q/T Sensor warning........................... 23
L
Liability..............................................3
R
M
Recycling......................................... 51
Regulations........................................ 4
Main menu....................................... 28
120
Installation, Maintenance and Service part
S
U
Safety.......................................... 17, 47
Safety devices.....................................49
Safety instructions............................... 47
Safety of the installation.......................50
Safety of the solar heating system......... 51
Scope.................................................. 7
Service conditions................................23
Service mode...................................... 83
Service program.................................. 81
Setting day and time............................38
Setting legionella prevention................. 84
Setting menu language........................ 37
Setting the central heating configuration.87
Setting the drain-back tank...................85
Setting the Q/T sensor......................... 87
Setting the service interval................... 83
Setting the solar difference................... 86
Setting the solar limit...........................86
Setting the water temperature.............. 29
Setting the water temperature via the SET
POINT menu....................................... 29
Setting water temperature during ON mode
.........................................................30
Settings............................................. 81
Settings............................................. 37
Solar collector maintenance.................. 92
Solar heating system........................... 58
Solar heating system configuration........ 85
Starting and stopping the week program 30
Status of the water heater.................... 21
Switch the pump on or off.....................83
Switching legionella prevention on and off
.........................................................85
Switching on the solar pump................. 86
Switching pressure measurement.......... 76
Switching to ON mode..........................29
Unvented installation........................... 50
Unvented water connections................. 56
Use....................................................25
User part............................................ 13
V
Vented installation............................... 50
Vented water connections..................... 57
Venting system................................... 58
W
Warnings.......................................... 100
Warranty.......................................... 115
Warranty..............................................3
Water composition............................... 54
Water connections............................... 56
Water temperature protection............... 49
Water-side maintenance....................... 90
Week program.................................... 30
Week program card............................108
Week program: setting the programcontrolled pump.................................. 32
Week program: setting the switch-off time
.........................................................32
Week program: setting the switch-on time
.........................................................31
Week program: setting the water
temperature....................................... 32
Working clearances..............................54
Working principle.................................43
T
T&P valve........................................... 50
Target group.........................................7
Technical details................................ 103
The appliance's heating cycle........... 25, 43
Trademark........................................... 3
Trademarks.......................................... 3
Troubleshooting...................................93
Turn off for a long period...................... 28
Turn off for a short period.....................27
Turn off the water heater................ 27, 77
Turn on the water heater...................... 77
Turn on the water heater...................... 25
0311746_HWHC_44-63_II_UKUK_V2.1 , 2017-09-11
121
122
Installation, Maintenance and Service part
7 Lombard Way, The MXL Centre, Banbury, Oxon, OX16 4TJ
Tel: +44(0) 1295 269 981, Fax:+44(0) 1295 271 640, Email: info@lochinvar.ltd.uk
www.lochinvar.ltd.uk
Lochinvar Ltd reserves the right to change
specifications without prior notice
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