POLA Xfarm User Manual

43
D.1.3.2 Air exchange
Path: Home> Installation> Climate> Ventilation> Air exchange
Setting the working parameters of Air exchanges.
When Step 0 is activated (it happens when indoor temperature is lower than the set Ventilation,
programmed in Settings>Climate par. C.1) program controls minimum ventilation by activating
programmed ventilation (Step Air Exchange) by timer function to avoid thermal shocks; Air changes are
influenced by outdoor temperature (can be reduced when outdoor temperature is low, see Ventilation’s
Conditioning par. D.1.3.6.3).
The ventilation step can be set into a cyclic mode so all fans can be used in sequence.
Duration of air exchange cycle. This is the total of the on and off
operating times of the air exchange.
Proportional Band in which the working time (ON) is calculated as
percentage of the duration of the Air Exchanges cycle.
Maximum % of Air exchanges.
When this is set at 0% the ON time is calculated based upon the Air
exchange setting programmed in Settings>Climate (see par. C.1).
Minimum time On ventilation calculated in Air exchange.
Relay number of the step which is activated during the ON time in
Air Exchange mode
*1
.
This value is automatically set = 1 at a cycle start-up.
Minimum Ventilation step in cyclic rotation during the phase of Air
exchanges
*2
. Active only with Step Air Exchange= 1.
Maximum Ventilation step in cyclic rotation during the phase of Air
exchanges
*2
. Active only with Step Air Exchange= 1.
D. Installation - Ventilation
Cycle duration
(Range: 0
m
.00
s
...10
m
.00
s
...60
m
.00
s
)
Exchange band
(Range: 0.0°...1.0°...30.0°)
Exchange max. %
(Range: 0
%
...80
%
...100
%
)
Minimum on
(Range: 0
m
.00
s
...0
m
.10
s
...1
m
.00
s
)
Step Air Exchange
(Range: 1...10)
Min. step exchange
(Range: 1...16)
Max. step exchange
(Range: 1...16)
*1
i.e when setting Step Air Exchange =2 during the On time the Step 2 will be working (fans 1 and 2
will be working simultaneously).
*2
i.e when setting Min. step exchange= 1 and Max. step exchange= 2 during the On time fans will be
operated this way: Fan 1 will be working on first On period, then Fan 2 will be working at second On
as so on in an alternated way.
Active only if Step Air exchange= 1.
Not active if fans are working by speed voltage regulation by autotransformer.

POLA Xfarm Specifications

General

Brand	POLA
Model	Xfarm
Category	Controller
Language	English