TF7038GB_A_NOT
BRINE CIRCUIT EXPANSION VESSEL
For the brine circuit, an expansion vessel
(membrane type) is already integrated in the
heat pump and pre-filled with nitrogen. The
expansion vessel must be adapted to the
existing system pressure during commissioning.
VENTILATION VALVE
Used to manually vent the system.
DRAIN COCKS
To drain the system (heating water circuit and brine circuit), drain lines with cocks are provided at the
lowest points of the two heat exchangers for service and decommissioning purposes.
BUFFER CHARGE PUMP
A hot water feed pump provides an available
external feed pressure to overcome pressure
losses outside the heat pump in the heating circuit
between the heat pump and the hot water buffer.
The feed volume of this high-efficiency energy-
efficiency pump is adjusted by the electronic
system control by means of a PWM signal.
AWN PUMP
A brine feed pump provides an available external
feed pressure to overcome pressure losses
outside the heat pump in the brine circuit between
the heat pump and the AWN module. This high-
efficiency energy-efficient pump must be adjusted
to the respective hydraulic losses during
commissioning. Instructions on how to do this are
also included with the unit.
HEAT METER VOLUME MEASURING UNIT
A heat meter determines the volume flow of the
heating water in the heat pump and its temperature
at the heat pump heating water outlet. An
additional temperature sensor is fitted at the
heating water inlet. The respective measurement
data is transferred to the unit control system. The
quantity of heat discharged is calculated from the
volume flow and the temperature difference.
2.3.3.
CONTROL AND SAFETY COMPONENTS
LOW-PRESSURE PRESSURE SWITCH
This device fixed on the low-pressure side of the cooling circuit stops the compressor from running if the
normal operating pressure range is undershot.
HIGH-PRESSURE PRESSURE SWITCH
This device fixed on the high-pressure side of the cooling circuit stops the compressor from running if the
normal operating pressure range is overshot.
ELECTRONIC CONTROL AND SWITCH PANEL
The heat pump is equipped with a power switch and control cabinet according to standard EN 60204-
1/IEC 204-1, including:
•
Door lock disconnect switch
•
Circuit breaker
or motor protection switch for compressors
•
Terminals for connecting the external temperature sensors
•
Terminals for connecting external components such as heating circuit pump or heating circuit mixer
•
Terminals for boiler/heating resistors alarm signal input,
•
Terminals for external WP release by the AWN
10
