Operation; Description; Bypass Function Preconditions; Frost Safety - ubbink Ubiflux W180 Consignes D'installation

Chapter 4

4.1 Description

The appliance comes plug and play and operates fully auto-
matically. The exhausted 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 four ventilation modes.
4.2 Bypass functionality
Because of its compact design, the appliance is not equipped
with a bypass diffuser but it uses bypass functionality. Bypass
functionality means that the supply fan is switched off when
the bypass preconditions are satisfied. Then there is only a
mechanical exhaust air flow through the heat exchanger,
Bypass function active
Bypass function not active

4.3 Frost safety

To prevent freezing of the heat exchanger at extremely low
outdoor temperatures, the Ubiflux W180 features frost control.
Temperature sensors measure the temperatures across the
heat exchanger and, if an optional preheater is installed, it will
be switched on when required.
4.3 Ubiflux+ version
The Ubiflux W180 is also available as "+" version. This version
is equipped with a different control board with 2 additional con-
nectors (X14 & X15) with more connection options for various
applications.
The "+" version has a 9-pole connector which is connected to
X15 from the control board. This 9-pole connector is accessible
from the top of the Ubiflux W180.
The 2-pole connector X14 is accessible after sliding the control
board to the front from the appliance (see §9.2 item 1 - 5). An
additional gland is available at the top of the appliance in "+"
version>. That makes it possible to feed a 230 V cable, which
may be connected to connector X14, to outside the appliance.
Always use a gland with strain reliever.
See § 11.1 for more information on the connection possibilities
of connectors X14 and X15.
10

Bypass function preconditions

- 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 a standard at 22°C)
- The outdoor temperature is lower than 10°C or
- the outdoor temperature is higher than de indoor temperature in the dwelling or
- the temperature from the dwelling is higher than the temperature set at step no. 5 in the set-
tings menu minus the preset temperature at hysteresis (step no. 6); the factory setting for
this temperature is 20°C (22.0°C minus 2.0°C).
Ubiflux W180 / W180+
Dependent on the connected multiple switch, 3 or 4 ventilation
modes can be used. The air flow rate can separately be ad-
justed for each ventilation mode. The constant volume control
system ensures that the air flowrate of the supply and exhaust
fans is realised independent of the duct pressure.
so under these conditions -undesired- heat recovery does not
occur. Optimum performance of this system requires natural
supply. It is assumed that at very high indoor temperatures
the user will automatically open the windows for reasons of
comfort.
That guarantees a proper ventilation balance, also at very low
outdoor temperatures. If, with switched on preheater, the ex-
changer temperature still starts to drop below zero, stepless
unbalance is created in the appliance.
9-pole connector

Operation

Feed-through op-
tion for 230V cable
from X14.