Solar Thermal System Settings Menu (Not Available For All User Interfaces); Solar Parameters Menu; Function Description - Bosch MS 100 Installationsanleitung

36 | Commissioning
4.5

Solar thermal system settings menu (not available for all user interfaces)

The tab. below provides a brief overview of the Solar settings
menu. The menus and available settings are described in detail
on the following pages. The menus depend on the installed user
Menu
Solar parameters
Solar circuit
Cylinder
Solar yield/optimisation The solar yield anticipated during the course of the day is estimated and taken into account
Transfer
Solar DHW
Start solar thermal system
Table 13 Overview of the Solar settings menu
The default settings are shown in bold in the
adjustment ranges.

4.5.1 Solar parameters menu

Solar circuit
Adjustment
Menu item range
Speed ctrl.
Sol. circ. pump
No
PWM
0-10 V
Min. speed sol 5 ... 100 %
circ pump
Start diff. 6 ... 10 ... 20 K
sol.circ.pump
Stop diff. 3 ... 5 ... 17 K
sol.circ.pump
Table 14
6 720 815 256 (2014/10)
Purpose of the menu
Settings for the installed solar system
Setting parameters in the solar circuit
Setting parameters for DHW cylinders
when controlling the heat appliance. The saving can be optimised using the settings in this
menu.
With a pump, heat can be used from the pre-heating cylinder to heat a buffer cylinder or a
cylinder for DHW heating.
Settings, e.g. for thermal disinfection, can be made here.
Once all the required parameters have been set, the solar system can be started up.

Function description

The efficiency of the system is improved by keeping the temperature differential at the set
switch-on temperature differential (switch-on diff. of solar pump).
▶ Activate the "Match-Flow" function in the Solar parameters > Solar yield/optimisation
menu.
Notice: Risk of damage to system through pump failure!
▶ If a pump with integrated speed modulation is connected, deactivate the speed
modulation function on the user interface.
The solar pump is not controlled via modulation.
The solar pump is controlled via modulation using a PWM signal.
The solar pump is controlled via modulation using an analogue 0-10 V signal.
The speed of the regulated solar pump cannot fall below the speed set here. The solar pump
remains at this speed until the switch-on criterion no longer applies or until the speed is
increased again.
If the collector temperature exceeds the cylinder temperature by the differential set here and
all conditions for switching on have been met, the solar pump is on (at least 3 K more than
Stop diff. sol.circ.pump).
If the collector temperature falls below the cylinder temperature by the differential set here,
the solar pump is off (at least 3 K less than Start diff. sol.circ.pump).
interface and the installed solar thermal system. If applicable,
the menu for the solar thermal system settings is described in
the installation instructions for the user interface.
MS 100