Daikin EKCBX008BBV3, Operation Manual

Page: 7 / 24

EKCBX/H008BBV3
Unit for air to water heat pump system
4PW67442-1A – 12.2010
Operation manual
6
4.5. Description of the operation modes
Space heating operation (
h
)
In this mode, heating will be activated as required by the water
temperature set point. The set point can be set manually (refer to
"Manual operation" on page 7 ) or weather dependent (refer to
"Selecting weather dependent set point operation (only in heating
mode)" on page 7
).
Startup ( d )
At the start of a heating operation, the pump is not started until a
certain refrigerant heat exchanger temperature is reached. This
guarantees correct startup of the heat pump. During startup, icon
d is displayed.
Defrost ( d )
In space heating operation or heat pump domestic water heating
operation, freezing of the outdoor heat exchanger may occur due to
low outdoor temperature. If this risk occurs, the system goes into
defrost operation. It reverses the cycle and takes heat from the indoor
system to prevent freezing of the outdoor system. After a maximum
of 8 minutes of defrost operation, the system returns to space heating
operation.
Space cooling operation (
c
)
In this mode, cooling will be activated as required by the water
temperature set point.
The set point can be set manually (refer to
"Manual operation" on
page 7 ) or weather dependent (refer to "Selecting weather
dependent set point operation (only in heating mode)" on page 7 ).
Domestic water heating operation (
w
)
Only for [4-03]=0, 1, 2, or 3
In this mode, the indoor unit will heat up the domestic hot water tank
by heat pump when the space heating/space cooling operation has
reached its temperature set point or heat pump domestic water
heating has a higher demand request than space side (depends on
dipswitch setting). When necessary and when allowed by the booster
heater schedule timer (refer to
"Programming quiet mode, booster
heating or domestic water heating" on page 11 ), the booster heater
provides auxiliary heating for the domestic hot water tank.
Only for [4-03]=4
In this mode, the indoor unit will heat up the domestic hot water tank.
There are several modes for heating up the domestic water tank:
1. Storage
•
Scheduled
The unit will heat up the domestic water tank starting from a
scheduled time and untill the domestic hot water storage set
point is reached. Preferally this is done during nighttime
when space heating demand is the lowest (and if applicable,
electric tariffs are low).
• Powerful
The unit will immediately heat up the domestic water tank
untill domestic hot water storage set point upon user request.
2. Reheat
•
Scheduled
The unit will heat up the domestic water tank starting from a
scheduled time and untill the reheat set point is reached.
Preferally this is done during the time of day when space
heating demand is lowest.
• Continuous
The unit will continuously heat up the domestic water tank
untill the reheat set point is reached. In this case a balance
with the space heating demand is made, which ever demand
is higher.
Powerful domestic water heating operation
In the case of urgent need of domestic hot water, the domestic hot
water temperature set point can be reached quickly by using the
electrical booster heater. Powerful domestic water heating operation
is forcing the electrical booster heater to operate until the domestic
hot water temperature set point is reached.
This function remains available in solar operation.
INFORMATION
■
Switching between space heating and space cooling
operation can only be done by pressing the
=
button or by the external room thermostat.
■
Space cooling operation is not possible if the
installation is a "heating only" installation.
INFORMATION
■
In order to provide domestic hot water throughout the
day, it is advised to keep the domestic water heating
operation on continuously.
■
The domestic hot water water temperature set point
can only be set manually (refer to
"Manual operation"
on page 7 ).
■
Any domestic water heating operation is impossible
when the domestic hot water tank is not installed.
When the w icon is blinking, the domestic hot water is
heating up by the solar kit option and not by the indoor unit.
Refer to installation manual of the EKSOLHW solar kit.
(only if [4-03]=4 or 5)
INFORMATION
■
For purpose and configuration refer to "Field settings"
on page 13 .
■
The domestic hot water storage set point can only be
set manually (refer to
"Manual operation" on page 7 ).
■
The domestic hot water reheat set point can only be
set by the setting [6-07]. Refer to
"[6] Scheduled
storage and reheat domestic water heating" on
page 15
.
■
Any domestic water heating operation is impossible
when the domestic hot water tank is not installed.
■
When the w icon is blinking, the domestic hot water is
heating up by the solar kit option and not by the indoor
unit. Refer to installation manual of the EKSOLHW
solar kit.
NOTICE
The setting [4-03] shall not be modified. The installer
selected the proper setting for your application.
INFORMATION
The status of this setting is only mentioned to indicate
which settings and functions are applicable for your
application.