44
D. Installation - Ventilation
Air-exchange
(works on Step 0 of ventilation)
.
Inside the
Exchange band
, starting from a minimum % percentage, the program will switch programmed
Step (
Step Air Exchange
) of ventilation with On-Off time duration calculated according to indoor
temperature.
Working time will be increased according to temperature to reach the complete ventilation step capacit
y,
until to
Exchange max. %.
i.e. when considering the following sets:
-
Ventilation
= 28.0°
(see par. C.1)
-
Air exchange
= 10%
*3
(see par. C.1)
-
Cycle duration = 10
m
.00
s
-
Exchange band =
1.0°
- Exchange max. % =
100%
- Step Air Exchange = 1
The system will work as follows:
-
Below 27.0°
(28.0°
Ventilation
Set - 1.0°
Exchange band
) the ventilation step 1 (
Step Air
Exchange=1
) will work 1 minute every 10 minutes of the cyle (10% of
Cycle duration
).
This for any temperature below 27.0°.
- When T = 27.1° Step one will work 2 minutes and will pause for 8 minutes (
Cycle duration
=
10
m
);
for every 0.1° increase in temperature the “On working time” will increase by 1 minute and the “Off
working time” will decrease by 1 minute accordingly (being the cycle duration still
10
m
) to reach
10
m
(100%) of “On working time” at 28.0° (
Ventilation
Set).
The max percentage can be limited (
Exchange max. %
).
When setting
Exchange max. % =
0
the “On working time” is kept fixed as per value
Air exchange
programmed in
Settings>Climate
(par. C.1).
- Beyond 28.0°
(
Ventilation
Set)
Step 1 is always on.
*1
This value (as set in
Settings>Climate
, see par.C.1) can be influenced by the outdoor temperature,
see par. D.1.3.8.3.
Working structure of “Air-exchanges” in ON-OFF Normal Ventilation Mode
100%
75%
50%
25%
0%
ON
ON
Time cycle
Time cycle
ON
ON
Time cycle
OFF
ON
*1
*1
Relay output in the time
OFF
OFF
ON
ON
OFF
STEP 0
VENTIL.
Maximum % controlled by
Exchange maximum %
Exchange band
STEP 1
VENTIL.
Ventilation temperature probe
Step 1 relative set
Minimum % controlled by
Air exchange %
*1
Set referred to the
Ventilation
set
*1
Minimum time on the relay=
Minimum on.
The relationship time
On / time Off is calculated every 0.1°
of the
Exchange band
.
Содержание Xfarm
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