Daikin EKCBH-BBV3 - Инструкция по эксплуатации - Страница 10

Installation manual

8

EKCBX/H008BBV3

Unit for air to water heat pump system

4PW66983-1C – 08.2011

8.2.

Application 2

Space heating only application without room thermostat connected to
the unit. The temperature in each room is controlled by a valve on
each water circuit. Domestic hot water is provided through the
domestic hot water tank which is connected to the unit.

1

Outdoor unit

2

Heat exchanger

3

Pump

4

Shut-off valve

5

Heater kit (optional)

6

Collector (field supply)

7

Motorised 3-way valve (optional)

8

By-pass valve (field supply)

9

Booster heater

10

Heat exchanger coil

11

Domestic hot water tank (optional)

FHL1...3

Floor heating loop (field supply)

T1...3

Individual room thermostat (field supply)

M1..3

Individual motorised valve to control loop FHL1...3
(field supply)

C

Control box

I

User interface

Pump operation

With no thermostat connected to the unit (1), the pump (3) can be
configured to operate either as long as the unit is on, or until the
required water temperature is reached.

Space heating

The unit (1) will operate to achieve the target leaving water
temperature as set on the user interface.

Domestic water heating

When domestic water heating mode is enabled (either manually by
the user, or automatically through a schedule timer) the target
domestic hot water temperature will be achieved by a combination of
the heat exchanger coil and the electrical booster heater.

When the domestic hot water temperature is below the user
configured set point, the 3-way valve will be activated to heat the
domestic water by means of the heat pump. In case of large domestic
hot water demand or a high domestic hot water temperature setting,
the booster heater (9) can provide auxiliary heating.

8.3.

Application 3

Space heating and cooling application with a 

room thermostat

suitable for heating/cooling changeover

  connected to the unit.

Heating is provided through floor heating loops and fan coil units.
Cooling is provided through the fan coil units only.

Domestic hot water is provided through the domestic hot water tank
which is connected to the unit.

1

Outdoor unit

2

Heat exchanger

3

Pump

4

Shut-off valve

5

Heater kit (optional)

6

Collector (field supply)

7

Motorised 3-way valve (optional)

9

Booster heater

10

Heat exchanger coil

11

Domestic hot water tank

12

Motorised 2-way valve (field supply)

FCU1...3

Fan coil unit (field supply)

FHL1...3

Floor heating loop (field supply)

C

Control box

T

Room thermostat with heating/cooling switch (optional)

I

User interface

INFORMATION

Details on pump configuration can be found under

"12.3. Pump operation configuration" on page 22

.

NOTICE

When circulation in each space heating loop (FHL1..3) is
controlled by remotely controlled valves (M1..3), it is
important to provide a by-pass valve (8) to avoid the flow
switch safety device from being activated.

The by-pass valve should be selected as such that at all
time the minimum water flow as mentioned in the chapter

"Piping connection work" in the EBHQ outdoor unit
installation manual 

is guaranteed.

It is recommended to select a pressure difference
controlled by-pass valve.

FHL1

FHL2

FHL3

6

8

M

M1

T1

M2

T2

M3

T3

7

10

9 11

I

C

4

3

2

5

1

CAUTION

It is possible to connect either a 2-wire or a 3-wire 3-way
valve (7). Make sure to fit the 3-way valve correctly. For
more details, refer to 

"Wiring the 3-way valve" on page 19

.

INFORMATION

The unit can be configured so that at low outdoor
temperatures the domestic water is exclusively heated by
the booster heater. This assures that the full capacity of the
heat pump is available for space heating.

Details on domestic hot water tank configuration for low
outdoor temperatures can be found under 

"12.9. Field

settings" on page 24

, field settings [5-02] to [5-04].

FHL1

FHL2

FHL3

12

10

9 11

M

FCU1

FCU2

FCU3

6

6

T

M

7

I

C

4

3

2

5

1