59
INSTALLER SETTINGS menu settings (for installers only)
6 720 617 763 (2008/09)
•
Mixer running time
: Use this menu item to set
the
Mixer running time
to the runtime of the
mixer motor used.
For menu structure and adjustment ranges
Æ
page 53.
•
Minimum outside temperature
: Set the mini-
mum outside temperature to UK standards (as
for heat loss calculations).
Typically -1 °C to -3 °C.
This provides an optimized heatcurve to UK
conditions.
Further reference is available in BS5449:1990
- Specification for forced circulation hot water
central heating systems for domestic
premises.
•
Building storage capacity
: Use this menu item
to set the factor for the heat storage capacity
of the building.
–
≥
50%
: Building of solid construction (e.g.
stone house with thick walls).
–
≤
50%
: Building of light construction (e.g.
weekend house made of wood).
•
Calibrate internal room temp sensor
: This
menu item only appears if the controller is
wall-mounted.
Use this menu item if you want to correct the
displayed room temperature.
B
Position a precision instrument near FW 100.
The precision instrument must not transfer
any heat to the FW 100.
B
Keep away from heat sources such as sunlight,
body heat, etc. for 1 hour.
B
Determine the displayed temperature differ-
ential (T
Reference
– T
FW 100
) and set as correc-
tion value.
For menu structure and adjustment ranges
Æ
page 53.
Warning:
Domestic hot water pipe-
work may freeze if the frost thresh-
old is set too low and long periods
of outside temperatures below
0 °C are experienced.
B
Default setting of the frost
threshold (3 °C) must only be
adjusted by an installer.
B
Don’t set the frost threshold too
low.
Damage caused by the frost
threshold being set too low is
not covered by the warranty.
