Dimplex A Class Air Source Heat Pump User manual

A Class Air Source Heat Pump
User Guide
I MPORTANT – T HIS MANUAL MUST BE LEFT WITH THE USER AFTER INSTALLATION
8/60476/0
Issue 1.03

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Contents
1: Introduction 1
: How the Heat Pump Works 1
.1 Tips and advice to follow when using your new heat pump 1
3: Heating System Controller
4: Operating the User Interface
4.1 Temperature
4. Home Screen 3
4.3 Space Heating 3
4.3.1 Com ort Levels 4
4.3.2 Operating Modes 5
4.3.4 Setting Time Periods 5
4.4 Domestic Hot Water (DHW) 6
4.5 Information 7
4.5.1 Adjusting Time and Date 8
4.5.2 In ormation - Message List 8
4.5.3 Changing Outside O Temperature 8
4.6 Temporary Modes 9
4.6.1 Going Out 9
4.6.2 Home Early 9
4.6.3 Holiday Mode 9
5: Safety 10
6: Defrost 10
7: Maintenance 10

1
1 Introduction
Thank you or choosing a Dimplex Heat Pump.
Dimplex A-Class is designed speci ically to
maximise year-round heating system e iciency,
no matter the weather conditions. Its high
e iciency means lower running costs and a
aster payback or the homeowner.
How the heat pump works
The operation o the heat pump is shown in
igure 1 below. A heat pump works on the same
principle as a ridge using a re rigerant luid
which boils at a low temperature. Free energy is
take rom the air to boil the re rigerant in the
evaporator coil (1), changing it rom a liquid to
a vapour. This low grade heat is upgraded by
the compressor (2) increasing its pressure, and
consequently its temperature, to a use ul high
temperature. The heat is trans erred to your
heating system by the condenser (3), where the
re rigerant becomes liquid once again. The
liquid re rigerant is then expanded using an
expansion valve to a low pressure luid be ore
repeating the cycle. 60-80% o the heat
generated by the heat pump comes rom the
ree energy taken rom the air, compared to 20-
40% generated by the electricity used to power
the heat pump.
.1 Tips and advice to follow when
using your new heat pump
• Glen Dimplex heat pumps are designed
with e iciency in mind. As a result o
using our renewable technology rather
than combustion or ossil uels, the hot
water used to heat your home is heated
gradually, which allows the system to only
use as much energy as is required.
Because o this however, it will be
necessary to set your new heating system
to heat water/rooms a little while be ore
you would have had to set a traditional oil
or gas heating system, in order to allow
ample time or the desired temperatures
to be achieved.
• When using a Glen Dimplex heating
system, it is important to remember that
it is not possible to have the DHW and
space heating switched on at the same
time. I , or example, you require both hot
water and heating in the morning, it is
recommended to use the DHW unction
irst, ollowed by the space heating. The
insulation used on our cylinders ensures
that hot water will stay hot or as long as
possible, however it generally takes longer
to initially heat the DHW than or the
space heating to take e ect.
When programming timer settings on the
UI, please check that the timer set or the
space heating and DHW do not overlap, as
the DHW unction will automatically take
priority.
Figure 2: Inside the Heat Pump
Figure 1: Re rigeration Cycle

2
3 Heating System Controller
(User Interface)
The controller/user inter ace that is supplied
with the Dimplex A-Class heat pump is used as
a heat pump controller as well as a heating and
domestic hot water (DHW) controller. It is also
the pre erred option or use as a temperature
control device. The unctions available or each
o these applications are explained in section 4.
When your heat pump system was installed, the
installer would have discussed with you the
di erent temperature control device options
available. While only one user inter ace is
currently available per system, there are
additional options o either temperature probes
or mechanical thermostats, which can be used
to control the temperature in up to our zones.
Mechanical thermostats provide less control
over the heating system, while the temperature
probe option allows the heat pump to sense
changes in demand and adjust accordingly. The
temperature probe option is generally
recommended over the mechanical thermostat
option.
A zone is de ined as the physical area o your
home in which temperatures are controlled by
each individual device. For example, you might
have the user inter ace installed in your living
area, in which case this may be re erred to as
zone 1. You may also install a temperature
probe upstairs in the sleeping/bedroom area,
which would then be designated as zone 2, and
so on. Extra zones are an additional, optional
eature o the heating system. The standard
package comes with one User Inter ace and the
possibility o our separate zones.
4 Operating the User Interface
• Select – click middle o dial (Enter/
Con irm)
• Change selected value – turn dial to
desired value
• Con irm change – click middle o dial
(Enter/Con irm)
• Back up one level – click small ’Esc’ button
(Escape)
4.1 Temperature
I the UI is not in use, the screen will switch to
screensaver mode a ter ten seconds, which
displays the current and set point temperature,
as shown in igure 3. When using a
mechanical thermostat to control
temperature in zone 1, the screensaver
feature will not be available. Turning the dial
le t or right will decrease or increase the
temperature. Clicking the middle o the dial
con irms the new set point temperature or
zone 1.
Figure 3: Main User Inter ace (UI)
(Esc)
Temperature
Display
Screensaver
Figure 4(a): Increasing zone temperature
Figure 4(b): Decreasing zone temperature

3
4. Home screen
The home screen, as shown in igure 5, is
accessed by pressing con irm rom the
temperature screensaver.
Example - at .55 a.m. on Monday
nd
November:
• Current water temperature in cylinder:
38°C
• Zone 1 temperature: 21°C
• Outside temperature: 5°C
• No temporary mode set
• No messages (‘i’ is white)
The home screen provides in ormation on the
current system temperature, zone 1 and
outside temperatures, the temporary mode that
is selected (i any) and an alert i any messages
are present. From the home screen, you can
access the ollowing menus:
Domestic hot water menu:
Set the heating mode o the hot water cylinder,
set time periods or the timer, boost the hot
water and set disin ection parameters. The
temperature that appears on the DHW icon on
the home screen is the current water
temperature.
Space heating menu:
Set the temperature o the space heating in
each zone, set heating to either ON, OFF or ON
TIMER mode, and set TIMER schedule settings.
Temporary mode menu:
Select rom 3 di erent temporary modes: Going
Out, Home Early and Holiday mode. See section
4.6 or details.
Information screen:
View details on the heat pump, the current
operation o the various parts o the heating
system, the system run time history and any
warning messages that may occur.
4.3 Space Heating
Selecting the space heating icon rom the home
screen will take you to the space heating menu,
shown in igure 6.
Figure 5: Home screen explained
Space Heating
Domestic
Hot Water
(DHW)
Temporary
Mode
In ormation
Figure 6: Space Heating menu explained
Operating Mode
Zone
Temperatures
& Com ort
Level
Timer
Setting

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Example:
• Room temperature is 21°C
• Heater is on
• TIMER mode selected
• Option 1 time period is selected
• At 9.35am the zone temperature will
decrease to 15°C (setback mode), as this
is the next change.
Zone temperatures:
This icon shows the zone 1 temperature. The
temperature o all zones can be controlled using
this menu, as shown in igure 7(a) and 7(b).
Operating mode:
This icon shows what mode the space heating is
running in: ON, OFF or TIMER. At initial start-up
the space heating setting is OFF and will need
to be adjusted to constantly ON or in TIMER
mode. Selecting the TIMER menu allows you to
select a prede ined programme which can be
modi ied in the ‘Setting’ menu.
Setting:
Set up time periods or the space heating to
come on and o .
4.3.1 Comfort levels
I you eel that the desired room air
temperature in your home is not being reached,
it is possible to increase the com ort level
settings on your UI, which changes the water
input temperature or your heating system.
Glen Dimplex heat pumps allow or weather
compensation, and operate on a heating curve,
which will set the low (water input)
temperature automatically depending on
outside conditions. The heating curves or each
zone in your home would have been set up by
the installer during the heat pump installation.
Changing the water input temperature will
change the response time or your heating
system.
In the com ort level submenu, as shown in
igure 8, it is possible to alter the water input
temperature or your system within a range o
6°C (-3°C to +3°C).
A warmer water input temperature will
increase energy consumption and
therefore running costs - every 1°C
reduction in the system’s water input
temperature will reduce energy
consumption by .5%.
You can set your com ort level to automatically
remain set or anything rom 1 hour to 14 days
( or short term changes or seasonal
adjustments), or i you wish to keep your
settings permanently, there is a permanent
setting option which will stay as set until you
change it again manually. The de ault com ort
level setting is 0.
Figure 7(a): Selecting a zone in the Zone
Temperatures submenu
Figure 7(b): Selecting a temperature or Zone 1
Figure 8: Adjusting com ort level

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4.3. Operating modes
Clicking on the clock icon allows you to select
rom one o three running modes:
TIMER mode activates the pre-set timer
programmes.
ON mode turns the heating constantly on.
OFF mode turns the heating constantly o .
When the heating is set to OFF, you will be
asked or a setback temperature, as shown in
igure 9(b). This temperature is the OFF
temperature, which operates as a rost
protection eature. It is also the minimum room
temperature when the system is idle, and is
used as the set point temperature in between
programmed TIMER periods. It is set to a
de ault o 15°C but can be changed to suit the
climate.
4.3.3 Setting time periods
Time periods are pre-set but can be changed. 5
di erent ‘Options’ are available, each o which
can have up to 3 time period settings, and are
accessible by selecting the ‘Setting’ icon in the
space heating menu.
Figure 9(a): Selecting a zone in the Operating
Mode menu
Figure 9(c): Selecting operating mode, which
includes the option to change the day and time
period (Option 1)
Figure 9(b): Selecting a Setback temperature
Figure 10(a): Selecting a time period (Options 1-5)
Figure 10(b): Selecting time and temperature
settings or each option.

6
re-set time periods
A number o time period have been pre-set to
typical heating time periods, to aid in quick and
easy initial set up. For example, Option 1 has
been set up as ollows:
Period 1 21°C 06:00 – 09:00
Period 2 19°C 12:00 – 14:00
Period 3 21°C 17:00 – 22:00
The pre-set time periods can be easy changed to
suit your pre erence by selecting the Space
heating menu and the ‘Setting’ option.
Quiet Mode
Runs the heat pump in quiet mode, which may
be desirable at night i the heat pump is located
near bedrooms. Please note that in quiet mode it
will take longer to reach the set temperature as
the heat pump is running at a lower capacity in
order to reduce noise.
4.4 Domestic hot water (DHW)
Selecting the domestic hot water icon rom the
home screen will take you to the domestic hot
water menu, shown in igure 11.
Water temperature:
This icon shows the set point temperature o the
DHW. You can also adjust the set point hot water
temperature here by turning the dial up or down
and then pressing it in to con irm, provided that
the TIMER mode is not set (TIMER mode
overrides all temperature changes except the
temporary modes explained in section 4.6 and
the Boost unction).
A practical temperature or domestic hot water is
45°C. The A-Class cylinder and heat pump
together can typically achieve up to 60°C. The
maximum achievable temperature or the heat
pump is measured during commissioning, and an
indication is given when selecting the DHW set-
point i the immersion will be required to achieve
the set-point (adjusting the temperature o the
DHW above the maximum cylinder temperature
causes the immersion to be used to heat the
water above this maximum temperature).
Operating mode:
This icon shows what mode the domestic hot
water is running in: ON, OFF or TIMER. The
de ault setting is OFF, but can be adjusted to
constantly on or in TIMER mode by selecting the
mode icon and turning the dial. Selecting the
TIMER menu allows you to select a prede ined
programme which can be modi ied in the ‘Setting’
menu.
Water
Temperature
(Set Point)
Setting
(Schedule Timer)
Disin ection
Settings
Figure 11: DHW screen explained
Operating Mode
Boost
Button
Figure 12: Setting a new temperature using the Water
Temperature unction

7
Figure 15: Setting disin ection requency and time
Boost:
When using TIMER mode, you may want to use
DHW be ore the next scheduled period, or
example, i you arrive home rom work early
and want to take a shower, but the DHW isn’t
scheduled to run until later. In this case, the
Boost unction can be used to override the
TIMER until the water in the cylinder reaches
the set point temperature.
Disinfect:
Enable disin ection and set the time when it will
occur.
Setting:
Set up time periods or the hot water to come
on and o . Time periods (in the ‘Setting’ menu)
are pre-set but can be modi ied. There are
three types o settings you can store at one
time; Weekdays, Weekends and Custom time
periods, shown in igure 13(a). Up to 3 periods
can be chosen or each setting, as shown in
igure 13(b).
The time periods selected in ‘Setting’ can be
applied in TIMER mode, as shown in igure 14.
4.4.1 Disinfection
Disin ection is a unction which keeps the level
o legionella bacteria in the cylinder under
acceptable levels. This is carried out by heating
the hot water in the cylinder to a high
temperature or a minimum set time. The
disin ection settings are pre-de ined in the User
inter ace. I you wish you can change the
requency o disin ection and the time that it
takes place, as shown in igure 10.
4.5 Information
Selecting the in ormation icon rom the home
screen will take you to the in ormation menu.
The in ormation menu provides you with details
o the settings which are currently active, as
shown in igure 16.
Figure 13(a): Setting menu options
Figure 14: Each setting rom the ‘Setting’ menu
can be set on TIMER mode using the ‘Running
Mode’ menu
Figure 13(b): Three time periods are available
in the ‘Setting’ menu or each setting

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The icons will be highlighted in green i that
part o the system is on and white i it is o .
Some o the symbols displayed on this screen
will depend on the set up o your heating
system, there ore some icons may not be
visible. In this screen, you can also access an
additional menu which allows you to change the
date and time, the outside o temperature and
to view a list o any messages that occur. This
menu is accessed by turning the rotary dial to
the ‘Login’ button and middle clicking. Turn the
dial to ‘998’ and middle click again.
4.5.1 Adjusting the date and time
The date and time will be set during installation.
I or any reason you need to adjust these
settings you can do so by using the ‘Login’
button in the in ormation screen, as shown in
igure 17. Turn the rotary dial to the login
button and middle click. Turn the dial to ‘998’
and middle click again.
4.5. Information – Message list
I the in ormation symbol on the home screen is
highlighted orange, it means a minor ault has
occurred. When the message icon is highlighted
in red on the home screen, it usually means
there is an issue with the operation o the heat
pump. When you see this you must contact the
heat pump installer and provide them with the
error code.
The ull message list can be viewed by entering
998, similar to the date and time menu
described in section 4.5.1. I a message is
active, it will be highlighted orange. Selecting
the message (by middle clicking the rotary dial)
will open a list o details about the system
operation the moment the message occurred.
4.5.3 Changing outside off temperature
You may not require your heat pump to come
on in warmer months, when the outside air
temperature reaches a certain level. You can
change the outside o temperature in the
in ormation menu, by entering ‘Login = 998’ as
be ore. In this menu you will see a submenu
called ‘General DHW & Heating Control’.
Accessing this menu will allow you to change
the outside o temperature, by clicking on the
temperature and turning the dial to increase or
decrease the temperature.
I the outside o temperature is set too low or
your environment (e.g. de ault outside o
temperature is 18°C) and the temperature
outside surpasses this (e.g. it is 20°C outside
during summer), the heating will be switched
o and will revert back to the set back
temperature (see section 4.3.3) until the next
change. This can be prevented by increasing
the outside o temperature.
You will also ind a number o other sub menus
in the ‘Login = 998’ menu. These menus display
in ormation about temperatures in each zone,
which may be required when speaking to a
service agent.
Backup Heater
Space Heating
Heat Pump
Cylinder Immersion
Bivalent Boiler
Domestic Hot Water (DHW) Login
Figure 16: In ormation Screen explained