Daikin EBHQ008BAV3 [4/20] Features and functions
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Daikin EBHQ008BAV3 [4/20] Features and functions

Daikin EBHQ008BAV3 [4/20] Features and functions
Operation manual
3
EBHQ006+008BAV3 + EKCBX/H008BAV3
Unit for air to water heat pump system
4PW64603-1A – 08.2010
4. OPERATING THE UNIT
4.1. Introduction
The heat pump system is designed to provide you a comfortable
indoor climate for many years at low energy consumption.
To get the most comfort with the lowest energy consumption out of
your system, it is very important to observe the items listed below.
Defining possible schedule timer actions for each day and filling out
the form at the very end of this manual can help you minimize the
energy consumption. Ask your installer for support if required.
■ Make sure the heat pump system works at the lowest possible
hot water temperature required to heat your house.
To optimize this, make sure the weather dependent set point is
used and configured to match the installation environment.
Refer to "Field settings" on page 11.
■ It is advised to install a room thermostat connected to the indoor
unit. This will prevent excessive space heating and will stop the
unit and the circulation pump when the room temperature is
above the thermostat set point.
■ Next recommendations only apply to installations with an
optional domestic hot water tank.
■ Make sure the domestic hot water is only heated up to the
domestic hot water temperature you require.
Start with a low domestic hot water temperature set point
(e.g. 45°C), and only increase if you feel that the domestic
hot water supply temperature is not sufficient.
■ Make sure the domestic water heating by booster heater only
start 1 to 2 hours before you expect domestic hot water
usage.
In case you only need a lot of domestic hot water in the
evening or in the morning, only allow domestic water heating
by booster heater during early morning and early evening.
Also keep hours with low electricity cost tariffs in mind.
To do this, program both the domestic water heating and
booster heating schedule timer. Refer to Programming in
chapter "Programming and consulting the schedule timer" on
page 8.
■ If the domestic hot water is not used for two weeks or more, a
quantity of hydrogen gas which is highly flammable may
accumulate in the domestic hot water tank. To dissipate this
gas safely, it is recommended that a hot tap be turned on for
several minutes at a sink, basin, or bath, but not at a
dishwasher, clothes washer or other appliance. During this
procedure there must be no smoking, open flame or any
electrical appliance operating nearby. If hydrogen is
discharged through the tap, it will probably make a sound as
of air escaping.
4.2. Operating the digital controller
Operating the unit comes down to operating the digital controller.
Features and functions
The digital controller is a state of the art controller that offers full
control over your installation. It can control a heating/cooling and a
heating only installation.
Both installations are available in multiple versions which vary in
capacity, electrical supply and installed equipment (with an optional
domestic hot water tank with a booster heater).
Basic controller functions
The basic controller functions are:
■ Turning the unit ON/OFF.
■ Operation mode change-over:
- space heating (refer to page 5),
- space cooling (refer to page 5) (*),
- domestic water heating (refer to page 6) (*).
■ Selection of features:
- quiet mode (refer to page 6),
- weather dependent control (refer to page 7).
■ Temperature set point adjustment (refer to page 6).
The digital controller supports a power cut off of maximum 2 hours.
When autorestart is enabled (see "Field settings" on page 11) this
allows a power supply shut down of 2 hours without user intervention
(e.g. benefit kWh rate power supply).
Clock function
The clock functions are:
■ 24 hour real time clock.
■ Day of the week indicator.
Schedule timer function
The schedule timer function allows the user to schedule the operation
of the installation according to a daily or a weekly program.
CAUTION
Never let the digital controller get wet. This may cause an
electric shock or fire.
Never press the buttons of the digital controller with a hard,
pointed object. This may damage the digital controller.
Never inspect or service the digital controller yourself, ask
a qualified service person to do this.
■ Descriptions in this manual that apply to a specific
installation or that depend on the installed equipment,
are marked with an asterisk (*).
■ Some functions described in this manual may not be
available or should not be available. Ask your installer
or your local dealer for more information on
permission levels.
NOTICE
(*) The functions 'space cooling' and 'domestic water
heating' can only be selected when the corresponding
equipment is installed.

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