Airflow DUPLEXVENT DV145SE Інструкції з експлуатації, технічного обслуговування та технічні вказівки - Сторінка 3

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OPERATING INSTRUCTIONS

Adjustment of supply air temperature

and summer/winter function

The temperature of air coming to the dwelling can be adjusted

between circa +10 °C and +30 °C. When there is a light on the

post-heating indicator, post-heating is activated and the unit heats air

as needed. The need for heating depends on the setpoint of supply

air temperature.

When there is no light on the post-heating indicator, post-heating is

o . This means that the summer function is activated for the ventilation

unit. The unit has a motorised summer/winter function. When the

summer function is on, the heat recovery cell is bypassed as soon

as outdoor air temperature has risen above the setpoint. See the

setpoint for cell bypass, factory setting +12 ºC. When outdoor air

temperature goes below the setpoint (factory setting +12 °C), the

unit starts to recover heat.

Two di erent kinds of supply air temperature adjustment can be

chosen at the unit: constant temperature control or cascade control.

In constant temperature control, the unit controls the temperature of

supply air directly in accordance with the measurement information

on the temperature of supply air blown to the ventilation area. In

cascade control, the unit controls supply air temperature according

to the temperature of air extracted from the ventilation area. The unit

calculates the di erence between the air extracted and the setpoint

for supply air and uses this di erence to control the need for post-

heating.

Winter function of ventilation unit

A set of parameters has been set at the factory for the freezing of

the heat recovery cell (3.21 and 3.22).When these parameters are

undercut, the ventilation unit melts the heat recovery cell utilising the

heat of extract air.

Melting is done by stopping the supply air fan (3.20. Choosing

melting mode) or by bypassing the heat recovery cell on the supply

air side (factory setting).

If the bypassing the heat recovery cell is chosen as the melting

mode, the relationship between the supply and extract air ﬂ ows

does not change. This prevents the formation of a vacuum inside,

which may be harmful in some cases. In this case the electric resistor

heats the cold air coming from outside during the melting period to

Fireplace switch function/booster

Fireplace switch function

(See the operating instructions for control panel, Section 3.12.)

• The ﬁ replace switch stops the extract air fan for 15 minutes and

produces overpressure in the ventilation zone. This makes it

easier to light a ﬁ replace.

The function is started on the main display of the control panel

by simultaneously pressing and holding down the + and –

buttons for 2 seconds.

• The function can also be started at a separate auto-reset push-

button switch, wired from the connection box of the unit for

example to a wall in the ﬁ replace room. Upon each pressing,

the stopping function continues for 15 minutes (the switch is not

included in the delivery).

• During the function, the ﬁ replace/booster switch symbol ( ) is

visible on the main display of the control panel.

NOTE! The starting of the extract air fan may weaken draught in the

ﬁ replace! In winter, this situation may disturb the winter function of the

unit. The situation will normalise in a while, after the ﬁ replace function

stops.

What the units include can vary depending on the sales area.

Fireplace/booster switch symbol

DV145SE

Remember!

Switch post-heating o when it starts to get too warm in the

dwelling because of warm weathers.

Switch post-heating on again when it gets cooler in autumn.

Maintenance reminder

• The maintenance reminder switches on the maintenance

reminder symbol( ) on the main display of the control panel

at deﬁ ned intervals, the factory setting being 4 months.

• The maintenance reminder symbol is acknowledged at

the main display of the control panel. (See the operating

instructions for control panel, Section 3.1.)

• The interval can be set between 1 and 15 months at the

control panel.

the temperature desired (2.6. Setting supply air temperature). If the

temperature desired is high compared to outdoor air temperature,

the unit decreases the supply and extract air ﬂ ows in order to attain

the desired supply air temperature.

A normal melting period varies from 15 to 45 minutes depending on

the amount of ice and the volume of the extract air ﬂ ow.

The unit operates optimally on the factory settings in normal operation

in dwellings and detached houses. The parameters only need to be

touched in extreme problem situations. Examples of such situations

are high humidity loads such as a swimming pool or if there is a

detrimental amount of ice in the exhaust air duct.

Booster switch function

(See the operating instructions for control panel, Section 3.12.)

• The booster switch function raises fan speed to the set maximum

fan speed for 45 minutes.

The function is started on the main display of the control panel

by simultaneously pressing and holding down the + and –

buttons for 2 seconds.

• The function can also be started at a separate auto-reset

push-button switch, wired from the connection box of the unit

to for instance a wall in a classroom. Upon each pressing, the

boosting function continues for 45 minutes.

• During the function, the ﬁ replace/booster switch symbol ( ) is

visible in the main display of the control panel.

• The function is chosen at the control panel.

Fault signal relay (remote monitoring)

• The fault signal relay has potential-free contacts

(24 VDC, 1 A).

• The contacts provide information on various failure modes

of the unit.

• Alarm of high carbon dioxide content switches the relay at

1-second intervals.

• In other fault situations, the contacts are closed.

Post-heating indicator light

Maintenance reminder

symbol