6 720 643 256 (2010/05)
MAIN MENU settings | 51US/CA
Solar optimization
To use as much solar energy as possible, the
FW 200 heating controls can estimate the
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
produce as much heat and will use less gas.
For more information for installers, see
Æ Section 8.5.10 on page 80
• Optimizing influence DHW: maximum
reduction of specified hot water temperature
by effect of solar thermal system.
Example:
– DHW set temperature = 140 °F (60 °C)
DHW optimization =28°F (15°C)
Specified domestic hot water temperature for
the boiler = 140 °F – 28 °F
(60 °C – 15 °C)
Provided there is sufficient solar output
available, the maximum reduction is set and the
boiler heats the domestic hot water to 114 °F
(45 °C), with the remaining 28 °F (15 °C) being
provided by the solar contribution.
• Heating circuit 1 optimization: Influence of
solar output on heat output that feeds into the
heating circuit 1. At a high value, the preheat
temperature of the heating curve is reduced at
a correspondingly greater rate (further
information for installers Æ section 8.3.1 and
8.3.2 from page 67) 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.
– Increase Heating circuit 1 optimization if
the heating circuit 1 heats rooms that have
large areas of south-facing windows.
– Do not increase Heating circuit 1
optimization if the heating circuit 1 heats
rooms that have small areas of north-facing
windows.
• Heating circuit 2 optimization: Take the steps
described under Heating circuit 1
optimization.
For menu structure and adjustment ranges
Æ page 38.
DHW optimization and Heating
circuit optimization start after a
calibration phase of 30 days after
the solar heating system is set up at
the earliest. During this period the
FW 200 heating controls learn the
potential solar input.
To Next Page
Loading...
