27
│
D.6. HEAT TRANSFER PUMP
Description
Hot water heating in an external HW storage tank is ensured by
pumping hot water from the thermal store to an integrated heat
exchanger in the HW storage tank. Heat transfer is controlled by
the TRS6K controller integrated in the BIO load unit.
For hot water pumping it is necessary to install a circulation
pump and a check valve that will prevent gravity circulation. It is
recommended to install a pump station – e.g. CSE OTS ZV W-SC,
code 17979. It involves a pump, a check valve, two ball valves and
a thermometer in a neat insulation.
Intended for variants
2 (mandatory accessory)
Function
If the temperature in the HW storage tank drops below the set
DHW temperature by the temperature difference, the controller
will check if the temperature in the thermal store is higher by the
set difference than the temperature in the hot water storage tank.
If yes, the heat transfer pump will switch on and keep running until
the desired temperature set for the HW storage tank is reached or
the temperature difference between the thermal store and the HW
storage tank drops below the preset value.
Installation
Following the diagram below.
Settings in controller
Parameters of heat transfer to a hot water storage tank will be set
automatically after the Variant 2 is selected during commissioning.
The desired hot water temperature in the HW storage tank can
be set in param. 5.6.2. (default 60°C). Switch-on and switch-off
temperature difference can be set in param. 5.6.1. (default 8 /
4°C). For a detailed description of all parameters see the chapter
Heat Transfer in controller menu 5.6.
Connecting terminal
Terminal R3
El. wiring
The pump is connected to TRS6K BIOMIX controller.
Wiring diagram
POWER SUPPLY
EXTRA LOW VOLTAGE
located on the top cover of the
printed circuit board
power supply
connector
