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Ubiflux W300(+) / W400(+) / W450(+)
Ubiflux W300(+) / W400(+) W450(+)
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Chapter 4
Operation
4.2 Bypass conditions
The standard bypass valve makes it possible to supply fresh
outside air that is not heated by the heat exchanger. Particular
-
ly during summer nights it is desirable to supply cooler outside
air. Then the hot air in the dwelling is replaced by cooler outside
air in so far as possible.
The bypass valve opens and closes automatically when a num
-
ber of conditions are satisfied (refer to the table below for by
-
pass conditions).
The operation of the bypass valve can be adjusted in step num
-
ber 5, 6 and step number 7 in the settings menu (see chapter
13).
4.3 Frost protection
To prevent freezing of the heat exchanger at extremely low out
-
door temperatures, the Ubiflux features intelligent frost control.
Temperature sensors measure the temperatures across the
heat exchanger and, if necessary, the preheater is switched
on. That guarantees a proper ventilation balance, also at very
low outdoor temperatures.
Bypass valve conditions
Bypass valve open
- The outdoor temperature is higher than 10°C
and
- the outdoor temperature is lower than the indoor temperature in the dwelling
and
- the temperature in the dwelling is higher than the temperature set at step no. 5 in the set
-
tings menu (set standard at 22°C).
Bypass valve closed
- The outdoor temperature is lower than 10°C
or
- the outdoor temperature is higher than de indoor temperature in the dwelling
or
-
the temperature outside the dwelling is lower than the temperature set at step no. 5 in the
settings menu minus the set temperature on the hysteresis (step no 6), this temperature is
standerd set at 20 ° C (22.0 ° C minus 2.0 ° C).
4.4 U version
The Ubiflux is also available as + version. This version is equip
-
ped with a different control board with 2 additional connectors
(X14 & X15) with more connection options for various applica
-
tions.
The 9-pole connector X15 is accessible at the rear of the
Ubiflux display cover without having to open the appliance.
The 2-pole connector X14 is accessible after taking off the dis
-
play cover. The display cover of the “+” version has a second
gland. That makes it possible to feed a 230 volt cable, which
may be connected to connector X14, two outside the appliance.
See § 11.1 for more information on the connection possibilities
of connectors X14 and X15.
4.1 Description
The appliance comes plug and play and operates fully auto
-
matically. The extracted indoor air heats up the fresh, clean
outdoor air. That saves energy and fresh air is sent to the re
-
quired rooms.
The control system has three ventilation modes. The air flow
rate can be adjusted per ventilation mode. The constant vo
-
lume control system ensures that the air flow rate of the supply
and extract fans is realised independent of the duct pressure.
X14
X15
