Mitsubishi Heavy Industries FDCW100VNX-A, Technical Manual

Page: 147 / 315

Control
‘19 • HM-T-340
CAUTION
Curve 0 in menu 1.9.1 must be selected for own curve to
apply.
Menu 1.9.8 - point offset
point offset 1.9.8
change in curve
outdoor temp. point
°C
°C
outdoor temp. °C
flow temperature °C
outdoor temp. point
Setting range: -40 – 30 °C
Default value: 0 °C
change in curve
Setting range: -10 – 10 °C
Default value: 0 °C
Select a change in the heating curve at a certain outdoor
temperature here. One step is usually enough to change the
room temperature by one degree, but in some cases several
steps may be required.
The heat curve is affected at ± 5 °C from set outdoor temp.
point.
It is important that the correct heating curve is selected so that
the room temperature is experienced as even.
TIP
If it is cold in the house, at, for example -2 °C, "outdoor temp.
point" is set to "-2" and "change in curve" is increased until
the desired room temperature is maintained.
CAUTION
Wait 24 hours before making a new setting, so that the
room temperat- ure has time to stabilise.
step difference compressors (RC-HY40
-W/HMA-S
only)
CAUTION
supply temperature
own heating curve 1.9.7.1
flow line temp. at -20 °C
flow line temp. at -10 °C
flow line temp. at 0 °C
flow line temp. at 10 °C
flow line temp. at -30 °C
flow line temp. at 20 °C
°C
°C
°C
°C
°C
°C
own cooling curve 1.9.7.2
flow line temp. at 10 °C
flow line temp. at 20 °C
flow line temp. at 30 °C
flow line temp. at 40 °C
flow line temp. at 0 °C
°C
°C
°C
°C
°C
20
20
20
20
20
heating
Setting range: 5 – 70 °C
cooling (accessory required)
Depending on which accessory is used the setting range can
vary.
Setting range: -5 – 40 °C
Create your own heating or cooling curve here, by setting the
desired supply temperatures for diff erent outdoor temperatures.
This setting option only appears if cooling is activated in
menu 5.2.4.
The degree minute difference for controlling when the next
compressor is to start is set here.
degree minutes cooling (
RC-HY40-W/HMA-S
only)
This selection is only available when the connected accessory
itself counts cooling degree minutes.
After a min. or max. value has been set, the system
will automatically set the real value in relation to the
number of compressors that are running cooling.
time betw. switch heat/cool
This selection is only available in cooling 2-pipe systems.
Here you can set how long RC-HY20/40
-W and HMA-S is
to wait before it returns to heating mode when the cooling
demand has ceased or vice versa.
Menu 1.9.7 - own curve
Control
- 145 -
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