Solar Settings - Bosch Worcester FW 100 Installation & User's Instructions
Weather compensation controller
Hide thumbs
Also See for Worcester FW 100:
- Installation and operating instructions manual (76 pages) ,
- Operating instructions manual (40 pages)
Table of Contents
6.5
Solar settings
Main menu: Solar
Use this menu if you want to limit the cylinder
temperature or optimise the specified domestic
hot water temperature and specified flow tem-
peratures based on the available solar energy in
your geographical region.
Limiting cylinder temperature(s)
In order to store as much solar energy as possi-
ble, a high cylinder temperature is required.
Limiting the cylinder temperature prevents over-
heating of the domestic hot water. The tempera-
ture setting is transmitted by the ISM module
during commissioning.
Warning: Risk of scalding if the cyl-
inder temperature is higher than
60 °C.
B If the cylinder temperature limit
is set to > 60 °C, fit a thermo-
static mixing valve in the hot wa-
ter supply pipe.
B Set the thermostatic mixing
valve to 60 °C max.
T2: Max. solar cylinder temperature: Set cyl-
•
inder temperature > 60 °C in systems with
domestic hot water cylinders only if hot water
outlet temperature is limited by a thermo-
static mixing valve.
When using solar buffer cylinders, e.g. in solar
preheat systems (solar system 3 and 4), T2:
Max. solar cylinder temperature can be set
higher.
For menu structure and adjustment ranges
page 35.
Solar optimisation
In order to use as much solar energy as possible,
the FW 100 heating controller can estimate the
6 720 617 763 (2008/09)
expected solar yield during the course of the day
and take this into account in controlling the
boiler. The boiler will then not be required to pro-
duce as much heat and will use less gas.
For more information for installers
Section 8.5.3 on page 62
Optimizing influence DHW: Maximum reduc-
•
tion of specified domestic hot water tempera-
ture through solar input.
Example:
– Specified domestic hot water temperature
= 60 °C
– Optimizing influence DHW = 15 K
– Specified domestic hot water temperature
for the boiler = 60 °C – 15 K
– Provided there is sufficient solar output
available, the maximum reduction is set
and the boiler heats the domestic hot
water to 45 °C, with the remaining 15 K
being provided by the solar contribution.
CH circuit optimizing influence: Influence of
•
solar output on heat output that feeds into the
heating circuit. At a high value, the preheat
temperature of the heating curve is reduced at
a correspondingly greater rate (further infor-
mation for heating engineers
from page 56) to enable greater passive solar
energy input through the building's windows.
At the same time this reduces a temperature
overshoot in the building and increases the
comfort level.
– CH circuit optimizing influence if the heat-
ing circuit heats rooms that have large
areas of south-facing windows.
– CH circuit optimizing influence if the heat-
ing circuit heats rooms that have small
areas of north-facing windows.
MAIN MENU settings
chapter 8.3
47
Table of Contents
Troubleshooting
