Daikin HXY080A8V1BF, Installation And Operation Manual, Page: 8 / 48

Installation and operation manual
6
125A8V1BF
VRV IV System indoor unit
4P405267-1C – 2021.04
Drain pan kit (EKHBDPCA2)
The drain pan is required to drain accumulated condensation from
the indoor unit. It is required during low temperature cooling
operation of the indoor unit and when the leaving water temperature
is <18°C.
For installation of this option into the indoor unit, refer to the
installation manual delivered with this option kit.
Heater kit (EKBUH)
The heater kit option can be installed to assist the heat pump during
heating operation or to provide primary heating during emergency
situations
(1)
.
4.2.2. Possible combinations of indoor unit and outdoor unit
5. Application guidelines
5.1. Overview: Application guidelines
The purpose of the application guidelines is to give a glance of the
possibilities of the Daikin heat pump system.
This chapter contains applications guidelines for:

Setting up the space heating/cooling system

Setting up an auxiliary heat source for space heating
5.2. Setting up the space heating/cooling system
The Daikin heat pump system supplies leaving water to heat emitters
in one or more rooms.
Because the system offers a wide flexibility to control the temperature
in each room, you need to answer the following questions first:

How many rooms are heated (or cooled) by the Daikin
heat pump system?

Which heat emitter types are used in each room and what is
their design leaving water temperature?
Once the space heating/cooling requirements are clear, Daikin
recommends to follow the setup guidelines below.
5.2.1. Single room
Under floor heating or heat pump convector – Wired room
thermostat
Setup
A Main leaving water temperature zone
B One single room
C One single room
a Outdoor VRV IV heat pump
b VRV Direct Expansion (DX) Indoor unit cassette
c HXY(080/125)
d Optional EKRUAHT user interface (master)
e Refrigerant piping
f Water piping
g Floor heating loop
h Fan coil unit
i Bypass valve (field supply)
j User interface (slave)

The under floor heating or heat pump connection is directly
connected to the indoor unit.

The room temperature is controlled by the user interface, which
is used as room thermostat. Possible installations:

User interface (standard equipment) installed in the room and
used as room thermostat

User interface (standard equipment) installed at the indoor
unit and used for control close to the indoor unit + user
interface (optional equipment EKRUAHT) installed in the
room and used as room thermostat
Benefits

Cost effective
.
You do NOT need an additional external room
thermostat.

Highest comfort and efficiency . The smart room thermostat
functionality can decrease or increase the desired leaving water
temperature based on the actual room temperature
(modulation). This results in:

Stable room temperature matching the desired temperature
(higher comfort)

Less ON/OFF cycles (more quiet, higher comfort and higher
efficiency)

Lowest possible leaving water temperature (higher efficiency)

Easy . You can easily set the desired room temperature via the
user interface:

For your daily needs, you can use preset values and
schedules.

To deviate from your daily needs, you can temporarily
overrule the preset values and schedules.
(1) More information can be found in the manual of the heater kit and on page
"9. Installing the optional EKBUHAA(6V3/6W1) heater kit" on page 26 of
this manual.
Outdoor unit
Indoor unit RYYQ8~20 RYYQ22~54 RXYQ8~20 RXYQ22~54
HXY080A8V1B O X O X
HXY125A8V1B O X O X
O = allowed
X = not allowed
INFORMATION
For detailed information, refer to the VRV IV heat pump
combination table in Technical Data. Combinations are
explained depending on the system layout of the VRV IV
heat pump series.
NOTICE

The illustrations in the application guidelines are
meant for reference only, and are NOT to be used as
detailed hydraulic diagrams. The detailed hydraulic
dimensioning and balancing are NOT shown, and are
the responsibility of the installer.

For more information about the configuration settings
to optimize heat pump operation, see the
configuration chapter.
C
B
A
d
B
A
d
b
e
c
f f
i i
j
a
g h