Performance data Tank heat transfer module
Midi DN 20 / Maxi DN 25
Functioning:
If the temperature in the domestic hot water tank (secondary tank)
falls below the nominal temperature set, the charging cycle is started.
If the temperature of the heat source is not sufficient, the potential-
free relay is switched on (depending on the system) for the reheating
demand. If the temperature available on the primary side is not
sufficient, the output of the secondary pump is possibly reduced.
Depending on the temperatures and the flow rate of the secondary
(potable water) side, the primary pump is controlled in such a way
that the adjustable nominal temperature is reached. A relay switching
on simultaneously with the primary or secondary pump enables the
use of a non-return valve or the switching of a 3-way valve (heating
operation / domestic hot water operation).
When using a switch valve it is possible, depending on the primary
return temperature of the station, to stratify the return flow rate in the
primary storage tank in two different levels. An additional relay with
a corresponding PWM outlet allows the connection of a controlled
circulation pump. The circulation pump can be activated depending
on the temperature and the time. Furthermore, the controller
contains a time-dependent disinfection control.
Controller FC4.13
The controller FC4.13 sets the hot water temperature of the tank heat
transfer module via the speed control of the primary pump.
The operation of the return distribution valve is an additional function
of the controller. Different operating modes are possible which
can be adapted to the system requirements. The tank heat transfer
module can be used as preheating station or as storage tank system
with or without buffer tank.
The pumps are actuated via a PWM signal. An output for switching
the return distribution valve is available.
Preset systems:
Tank heat transfer module - Basic system with
return distribution and circulation
01/2020 • Printed in Germany
PAW GmbH & Co. KG • 31789 Hameln • Germany • Phone: +49-5151-9856-0 • Fax: +49-5151-9856-98 • info@paw.eu • www.paw.eu
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Function overview controller FC4.13
Display
multiline LC-text display,
illuminated, with menu navigation
(multilingual)
Operation
7 push buttons
Relay outputs
3 x semiconductor relays, 230 V
1 x potential-free relay
4 x PWM signal for speed control
Inputs
10 x Pt1000
1 x Impulse input V40
Flow rate sensors
yes
Heat quantity balancing
yes
Return distribution
yes
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