Typical Application Examples; Application 2 - Daikin EKHBX008BB3V3S Installation Manual

A
PPENDIX
(for restricted power supply condition mode only)
Connection to benefit kWh rate power supply
For applications with restricted power supply condition mode, it is not
recommended to connect the system to a benefit kWh rate power
supply.
All items related to benefit kWh rate power supply should be
neglected.

3.4. Typical application examples

The application examples given below are for illustration purposes
only and specifically for applications with restricted power supply
condition mode.

Application 2

Space heating only application without room thermostat connected to
the indoor 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 indoor unit.
1 2 3 4 6 5
6
1 Outdoor unit
2 Indoor unit
3 Heat exchanger
4 Backup heater
5 Pump (field supply)
6 Shut-off valve
7 Motorised 3-way valve (delivered with domestic hot water
tank)
8 Collector (field supply)
9 By-pass valve (field supply)
10 Domestic hot water tank (optional)
11 Booster heater
12 Heat exchanger coil
FHL1...3 Floor heating loop
T1...3 Individual room thermostat (optional)
M1...3 Individual motorised valve to control the floor heating loop
(field supply)
Pump operation
With no thermostat connected to the indoor unit (2), the pump (5) can
be configured to operate either as long as the indoor unit is on, or
until the required water temperature is reached.
INFORMATION
Details on pump configuration can be found under
"8.3. Pump operation configuration" on page
(1) For tank without electrical booster heater (EKHTS), the backup heater will
be used in domestic water heating mode.
(2) Only applicable for tank with built-in electrical booster heater (EKHW*).
Installation manual
51
7 8
T1 T2 T3
M
M1 M2 M3
FHL1
11 12
FHL2
FHL3
10
(1)
(2)
24.
Space heating
The outdoor unit (1) will operate to achieve the target leaving water
temperature as set on the user interface.
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 (9) 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 under
"6.7. Water pipework" on page 14
It is recommended to select a pressure difference
controlled by-pass valve.
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 the heat
exchanger coil, or 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 hot water by means of the heat pump. In case of high
9
domestic hot water temperature setting, the booster heater (11)
(6)
backup heater (4)
INFORMATION
■
See Information table
heating/cooling demand and domestic hot water
demand" on page
■
Be aware that all applications with domestic hot water
heating
on page
in this application.
NOTICE
Be sure that the correct field settings are active or selected
according to the applicable tank type. See field settings in
"[4] Booster heater operation and space heating off
temperature" on page 53
(3) Only applicable for tank with built-in electrical booster heater (EKHW*).
(4) Only applicable for tank without electrical booster heater (EKHTS).
(5) Only applicable for tank with built-in electrical booster heater (EKHW*).
(6) Only applicable for tank without electrical booster heater (EKHTS).
is guaranteed.
(3)
or backup heater
provides heating.
"Balance between space
50.
("Application 3" on page 6 and
7) will have the same limitations as described
for more details.
Indoor unit for air to water heat pump system
(4)
.
(5)
or
"Application 5"
EKHBX008BB3V3S
4PW62597-1 – 10.2010