28.2
Outside Temp. Control at - 1
°
C
Setting the flow temperature when outside
air temperature is -1
°
C
Enter here the flow temperature at -1
°
C
outside temperature. The flow temperature
is normally dependent on the size of the
radiators and the calculated mean water
temperature (generally 80
°
C). The limiting
factor will be the function number setting.
Confirm by pressing the "MENU" button.
The supply temperature will automatically
adapt to any changes in the outside
temperature in relation to this outside
temperature.
28.3
Minimum pump speed
If a modulating pump has been installed in
the boiler, this function can be used to set
the minimum pump speed. Normally, this
value is 38%, but if the system resistance is
high the minimum value must be set higher.
Use the "+" and "-" buttons to change the
minimum percentage.
Confirm by pressing the "MENU" button.
28.4
Maximum pump speed
Normally the pump speed is 100%; if the
water velocity or the noise from the
radiators is too high, it is recommended to
decrease the speed, taking into account the
radiators that are furthest from the boiler
must still maintain a sufficient flow.
28.5
Flow temperature secondary
circuit
When a secondary circuit control has been
connected (MR 03 available from eco
hometec) to the boiler, the heating curve
between the flow temperature of this circuit
has to be set.
Enter the required flow temperature when
outside air temperature is + 20
°
C, normally
no heating would be necessary and the
setting should be 20
°
C adjust if necessary.
The flow temperature -1
°
C is set at the
MR 03 control unit.
28.6
Service counter
The boiler programme has a service
counter, which is programmed at 365 days;
after this period the message:
"INSPECTION" appears. No other displays
are shown until the fitter has reset the value
of 365 days, or a different number of days,
by pressing the "+" button.
If necessary, this message can be removed
from the system.
28.7
Pump continuous
Pressing the "+" button will cause the pump
to operate continuously, except if the
Summertime Mode is selected. Pressing "-"
indicates that a pump switch is present.
28.8
Eco/eco+
If a modulating pump has been installed,
the pump will modulate automatically in
order to maintain the 20
°
C difference
between the supply and return water
temperatures.
After heating in the morning, this modulation
will only start after the desired supply
temperature has been reached.
If the resistance in the system is high, it is
often desirable to obtain a higher pump
pressure: if "ECO" is selected, the pump will
start modulating when a return temperature
of 50
°
C or higher has been reached.
In the "ECO+" mode, the pump will
modulate at any water temperature, with the
exception of the heating cycle in the
morning.
28.9
Post running of pump after HW
This function is used to set the post running
time for the pump after the boiler has
reached the required temperature. The
default is 2 minutes, unless there is a
demand from the CH system.
28.10
Post running of pump after CH
This function is used to set the post running
time for the pump after the boiler has been
switched off. The default is 1 minute.
EC 16~38 Installation Manual page
41
