Daikin Altherma HT User manual

User Guide – Altherma HT
For your new Daikin Altherma high temperature heat pump
your comfort. our world.

User Guide – Altherma HT
1
In this manual you will find information and guidelines that will allow
you to run your Daikin Altherma heat pump system in the most energy
efficient and cost effective way.
We hope you enjoy a warm and comfortable winter season!
Your new Daikin Altherma
heat pump
Outdoor unit Hot water cylinder Hydrobox Daikin Altherma controller
System overview
The heart of your new central heating system
is a highly efficient Daikin Altherma air source
heat pump. The heat pump heats the water
which flows around your central heating and
separately heats the hot water when required
in your hot water cylinder. The central heating
is usually controlled from a Daikin controller or
programmable room thermostat which
switches the heat pump on and off at preset
times, sending warm water through the
central heating. Most radiators have thermostats
(TRV’s) fitted to control the individual
room temperatures.

User Guide – Altherma HT
2
Outdoor unit
Outside is the heat pump. This extracts heat
from the air, even below 0°C and uses this heat
to heat the water passing through the central
heating and hot water cylinder.
The outdoor unit pulls in air from the rear,
extracts the heat in the air, and blows the cooled
air out the front. This is done automatically,
and there is no need to set or adjust it.
If the rear of the outdoor unit gets clogged
up with leaves or debris, the efficiency of your
heating system can be reduced, this should be
checked regularly and cleaned with a soft brush.
Similarly, don’t block the front of the unit up by
leaning anything against it.
Hydrobox
The hydrobox is located below the hot water
cylinder. This distributes hot water around the
central heating and to the cylinder. The Daikin
Altherma controller communicates with the
hydrobox for efficient use.
Cylinder
Hot water is stored in the cylinder. To ensure low
running costs the cylinder is normally set to heat
to 50°C. Your system is set up to heat the water
in the cylinder at the time when it is cheapest.
If you have Economy 7 this will be during
off-peak periods. If not, it will be during the day
when the air temperature is higher. The cylinder
is being heated when the symbol is shown on
the Daikin Altherma controller. Once a week the
water in the cylinder is heated to 60°C to ensure
the cylinder remains free from bacteria.
Your heating system in detail
and getting the most from it

Hot water preparation in detail
Your system is set up to heat the water in the cylinder at the time
when it is cheapest. If you have Economy 7 this will be during
off-peak periods. If not, it will be during the day when the air
temperature is higher.
Programmable room thermostat
You may have a room thermostat installed in
your property. It would be located in the hall or
within certain rooms. It controls when the house
is heated, and to what temperature.
It is likely the thermostat has been set to
heat the house to 21°C in the early morning,
lunchtime and evening, with a cooler 18°C
at other times from Monday to Friday.
At weekends, it is set to 21°C from early morning
until late evening, with 18°C over night.
Heat emitters: radiators
Most radiators are fitted with Thermostatic
Radiator Valves (TRV’s) as shown in the picture
which ensures rooms will not become
too warm.
Temperatures are represented by numbers
or roman numerals I, II, III, IIII. The higher the
number, the warmer the room temperature.
Each valve should be set according to the
temperature you wish to achieve.
Underoor heating (UFH) and/or
fan coil units (FCU)
If UFH heating is installed you may see
a manifold in your airing cupboard
or similar with pipes going
into the floor. This will heat
your floors, which in turn
heat your home. If FCU are
installed you will see them
on your walls. FCU operate
in a similar way to radiators,
but a fan in the unit
pushes heat into the
space around it.