POLA Xfarm User Manual

50
D. Installation - Ventilation
Outdoor temperature under which the decrease of Air exchange set
is activated (see par. C.1).
Decrease of the % Air exchange (absolute value) set for every 1°
decreasing of Outdoor temp. set.
Maximum decrease of the Air exchange set.
Outdoor temp. set
(Range: -30.0°...10.0°...50.0°)
Air exchange decr.
(Range: 0
%
...100
%
)
Maximum set decr.
(Range: 0
%
...50
%
)
D.1.3.6.3 Decrease air exchange
Path: Home> Installation> Climate> Ventilation> Conditionings> Decrease air-exchage
This function allows decrease the % of air changes when outdoor temperature is very cold.
For every 1° decrease of outdoor temperature when the Block is activated (Outdoor temp. set), the %
Air exchange is is decreased of the value set in Air exchange decr., until a maximum value set in
Maximum set decr.
i.e. when considering the following sets:
Air exchange = 20% (see par. C.1)
Outdoor temp. set = 10.0°
Air exchange decr. = 10% (% calculated on the Air exchange).
Maximum set decr. = 50% (as % calculated value of Air exchange).
When outdoor temperature is higher that 10.0° (Outdoor temp. set) the Air exchange set will be 20%,
at 10.0° of outdoor temperature will be 18% (20% - 10% of 20%= 18%), due to decrease of 10% (Air
exchange decr.) for every lower outdoor temperature degree, up to a maximum decrease of 50%
(Maximum set decr., as % calculated value) which will bring set of Air exchange= 10% at 6.0°C of
outdoor temperature.
OFF
AIR
EXCHANGE
SET
DECREASE
Outdoor
temperature
ON*
*Decrease of Air exchange Set
controlled by Maximum decr.
Outdoor temp. set
Differential
fixed=1.0°

POLA Xfarm Specifications

General

Brand	POLA
Model	Xfarm
Category	Controller
Language	English