Heating control - user manual
www.solarcontrols.cz
Instructions for the installation and setup
of the device
Page 23 of 58
HEAT PUMPS TAB
It includes the control blocks for managing outdoor units of heat pumps.
Note:
This function is available only with the activated Heat Pumps SW extension.
Outdoor units can be of two versions:
a)
invertor units with the option of PWM power control by an external signal, e.g. by voltage 0-10 V.
b)
units which cannot be controlled externally (with or without an inverter), they can be only switched on
and off.
Note
: Heating Control is generally unable to control configurations of heat pumps (outdoor and indoor unit).
These configurations have their own control usually located in the indoor unit and without the option of
external switching. Heating Control is designed primarily for controlling outdoor units and the indoor unit is
replaced with direct condensation in the storage tank. Use of indoor units with a plate-type exchanger in the
multi-source heating mode in the storage tank is not convenient and therefore these configurations are not and
will not be supported by the manufacturer. If, nevertheless, you wish to make use of, for example, your existing
heat pump and you wish to control it by means of the Heating Control device, you should always consult
compatibility with the manufacturer or supplier of your heat pump.
The heat pump can be operated in 2 modes:
Internal control
– the power of the heat pump is controlled according to the difference between the
required temperature and the current control temperature, in other words it is the required power
according to the heating requirement for the building.
External control
– the power of the heat pump is determined directly by an external device, in the
current version it is WATTrouter M.
In addition, Heating Control can combine both these modes.
The output power of the heat pump is
determined as the maximum of the internally and externally required power:
)
This method does not limit the heat comfort in the building and, at the same time, it enables heat
accumulation in the case of control by an external device, i.e. the WATTrouter, if the current excess energy
from the photovoltaic power station is higher than the power required for the optimal heating of the
building.
This block also includes functions for the control of up to two bivalent heat sources (2
nd
level). The bivalent
sources are switched on only if the outside temperature drops under the limit specified by the parameter
“Max. outside temperature to run bivalents”. A gas boiler or an electrical cartridge heater in the storage tank
can constitute a 1
st
level bivalent source. 2 electrical cartridge heaters in the storage tank or possibly only one
cartridge heater whose heating coils are switched on separately in a certain ratio (typ. 2:1) can constitute a 2
nd
level bivalent source.
The 1
st
level bivalent source is switched on when the heat pump is running in the internal control mode for the
period set by the “Bivalent 1
st
level on-delay” parameter and at the same time the current control temperature
does not reach the required value decreased by a quarter of the proportional band (this decrease eliminates
possible temperature overshoots of the heating water).
The 2
nd
level bivalent source is switched on when the 1
st
level bivalent source is running for the period specified
by the “Bivalent 2
nd
level on-delay” parameter.
Description of configuration and status elements:
