Description Of The Operation Modes; Space Heating Operation (H); Space Cooling Operation (C); Domestic Water Heating Operation (W) - Rotex RKHBH016BB3V3 Manuel D'utilisation

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" 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" on page 7).
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.
Domestic water heating operation (
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
DIP switch setting). When necessary and when allowed by the
booster heater schedule timer (refer to "Programming space cooling,
quiet mode, or booster heater mode" on page 11), the booster heater
provides auxiliary heating for the domestic hot water tank.
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.
RKHBH/X016BB
Indoor unit and options for air to water heat pump system
4PW62577-1 – 10.2010
=
)
w
Only for [4-03]=4 or 5
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.
INFORMATION
■
For purpose and configuration refer to "5. 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.
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.
[4-03]=0, 1, 2, 3, or 4 is only for domestic hot water tank
with built-in electrical booster heater (RKHW*).
[4-03]=5 is only for domestic hot water tank without
electrical booster heater (RKHTS).

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 heater. Powerful domestic water heating operation is forcing
the electrical heater to operate until the domestic hot water
temperature set point is reached.
Operation manual
6