TO SELECT ANOTHER CURVE (SLOPE):
NOTE
If you only have one climate system, the
number of the curve is already marked when
the menu window opens.
1.
Select the climate system (if more than one) for
which the curve is to be changed.
2.
When the climate system selection has been con-
firmed, the curve number is marked.
3.
Press the OK button to access the setting mode
4.
Select a new curve. The curves are numbered from
0 to 15, the greater the number, the steeper the
slope and the greater the supply temperature. Curve
0 means that own curve (menu 1.9.7) is used.
5.
Press the OK button to exit the setting.
TO READ OFF A CURVE:
1.
Turn the control knob so that the ring on the shaft
with the outdoor temperature is marked.
2.
Press the OK button.
3.
Follow the grey line up to the curve and out to the
left to read off the value for the supply temperature
at the selected outdoor temperature.
4.
You can now select to take read outs for different
outdoor temperatures by turning the control knob
to the right or left and read off the corresponding
flow temperature.
5.
Press the OK or Back button to exit read off mode.
TIP
Wait 24 hours before making a new setting,
so that the room temperature has time to sta-
bilise.
If it is cold outdoors and the room temperature
is too low, increase the curve slope by one in-
crement.
If it is cold outdoors and the room temperature
is too high, lower the curve slope by one incre-
ment.
If it is warm outdoors and the room temperat-
ure is too low, increase the curve offset by one
increment.
If it is warm outdoors and the room temperat-
ure is too high, lower the curve offset by one
increment.
COOLING IN 2-PIPE SYSTEM
VVM 225 contains a built-in function for operating cooling
in a 2-pipe system down to 17 °C, factory setting 18 °C.
This requires that the outdoor module can perform
cooling. (See the Installer Manual for your air/water heat
pump.) If the outdoor module can perform cooling, the
cooling menus are activated in the display on the indoor
module (VVM).
In order for operating mode “cooling” to be permitted,
the average temperature must be above the setting
value for “start cooling” in menu 4.9.2
The cooling settings for the climate system are adjusted
in the indoor climate menu, menu 1.
Setting hot water
circulation
HOT WATER RECIRC.
operating time
Setting range: 1 – 60 min
Factory setting: 60 min
downtime
Setting range: 0 – 60 min
Factory setting: 0 min
Set the hot water circulation for up to three periods per
day here. During the set periods the hot water circulation
pump will run according to the settings above.
"operating time" decide how long the hot water circula-
tion pump must run per operating instance.
"downtime" decide how long the hot water circulation
pump must be stationary between operating instances.
NOTE
Hot water circulation is activated in menu 5.4
"soft inputs and outputs".
39Chapter 6 | Commissioning and adjustingNIBE VVM 225
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