COMMISSIONING
31
Commissioning of solar controller
Controller functions
The differential temperature controller contains many functions to regulate and monitor the solar primary system.
Including
– controller functions for heating the solar cylinder
– functions for system protection and system monitoring
– additional functions (other accessories may be required to achieve these functions).
General controller functions
The controller collects the temperatures from various measuring points and determines the right time to charge the storage
tank taking account of programmed (additional) functions and controller parameters.
Cylinder heating by solar primary system
Switching action can be adjusted through dTmax (dTon) and dTmin (dToff). The solar cylinder is heated by operating the
solar pump on output A1 up to the set maximum storage temperature (65°C). Pump operation starts when the collector
temperature exceeds the cylinder temperature by more than dTon and continues while the collector temperature is above
cylinder tempe dToff, as set in the programming menu. dTon cannot be set lower than dToff + 1K.
Rotational speed regulation
The solar circulation pump on 230V-outputs A1 and A2 can be operated either in switch-mode (two-point controller) or in
a rotational speed regulated way. If the rotational speed regulation is activated the pump power is adjusted by a controller
so that switch-on temperature difference “Storage tank dTmax” is kept constant as much as possible. At lower deviation of
“Storage tank dTmax” the pump is operated with the lowest power till the switch-off wave is reached.
Corresponding values in menu
"Basic adjustment"
“Programming”
---
Maximum temperature
---
dT max (dT on)
Switch-on temperature difference
---
dT min (dT off)
Switch-off temperature difference
Corresponding values in menu
"Basic adjustment"
"Programming"
---
Rotational speed min <100%
Summary of Contents for Eco SolaReady
Page 1: ...Hot Water Cylinders MEGAFLO Eco SolaReady Unvented MEGAFLO Eco SolaReady Product Guide...
Page 48: ...SERVICING 48...
Page 50: ...SERVICING 50...
Page 51: ...SERVICING 51 Notes...
