Mitsubishi Heavy Industries FDCW100VNX-A, Technical Manual

Page: 146 / 315

Control
'19 • HM-T-340
Menu 1.9.5 - cooling settings
cooling 1.9.5
delta at +40 °C
delta at +20 °C °C
°C
°C
DM
heat/cool sen.
heat at room under temp.
set pt value cool/heat sensor
BT74
cooling 1.9.5
set pt value cool/heat sensor
heat at room under temp.
cool at room over temp.
use room sensor
°C
°C
°C
delta at +20 °C
Setting range: 3 – 10 °C
Factory setting: 3
delta at +40 °C
Setting range: 3 – 20 °C
Factory setting: 6
heat/cool sen.
Setting range: BT74 (BT50, RMU-BT50) Factory setting:
BT74
set pt value cool/heat sensor
Setting range: 5 – 40 °C
Factory setting: 21
heat at room under temp.
Setting range: 0.5 – 10.0 °C
Default value: 1.0
cool at room over temp.
Setting range: 0.5 – 10.0 °C
Default value: 3.0
start active cooling
Setting range: 10 – 300 DM
Factory setting: 30 DM
step difference compressors (RC-HY40
-W/HMA-S
only)
Setting range: 10 – 150
Default value: 30
degree minutes cooling (RC-HY40
-W/HMA-S
only)
Setting range: -3000 – 3000 cooling degree minutes Factory
setting: -1
time betw. switch heat/cool
Setting range: 0 – 48 h
Factory setting: 2
You can use RC-HY20/40 -W and HMA-S to cool the house
during hot periods of the year.
CAUTION
Certain setting options only appear if their function is
installed and activated in RC-HY20/40
-W and HMA-S
.
delta at +20 °C
Set the desired temperature difference between supply
and return lines to the climate system during cooling
operation when the outdoor temperature is +20 °C. RC-
HY20/40-W and HMA-S then attempts to get as close to the
set temperature as possible.
delta at +40 °C
Set the desired temperature difference between supply
and return lines to the climate system during cooling
operation when the outdoor temperature is +40 °C. RC-
HY20/40-W and HMA-S then attempts to get as close to
the set temperature as possible.
heat/cool sen.
If a particular room will determine how the whole installation
will work, a room sensor (BT74) is used. If room sensor
(BT74) is connected to RC-HY20/40, room sensor (BT74)
determines when it is time to switch between cooling
and heating operation for the whole installation.
CAUTION
When the heating/cooling sensors (BT74) have been
connected and activated in menu 5.4, no other sensor can be
selected in menu 1.9.5.
set pt value cool/heat sensor
Here you can set at which indoor temperature RC-HY20/40-
W and HMA-S is to shift between heating respectively
cooling operation.
heat at room under temp.
Here you can set how far the room temperature can drop below
the desired temperature before RC-HY20/40-W and
HMA-S switches to heating operation.
cool at room over temp.
Here you can set how high the room temperature can increase
above the desired temperature before RC-HY20/40-W and
HMA-S switches to cooling operation.
start active cooling
Here you can set when active cooling is to start.
Degree minutes are a measurement of the current
heating demand in the house and determine when the
compressor, cooling operation respectively additional heat
will start/stop.
Control
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