enervent Salla eAir Installation Instructions Manual Download

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169

Installation instructions for professionals

Weekly and annual programs

Time program can be used to set a not-normal mode to
activate at certain time on certain weekdays, or for two
calendar days.

For example, when the apartment is empty, the blower
speed can be reduced by creating a time program that
sets the unit in Away mode.

Weekly and annual programs are set in the Time programs
menu. The weekly program has 20 different time program
rows, to which you can enter both the start and end
dates of the time program and the time program mode
according to which the unit functions for that time. If the
weekly program is wanted to run overnight, both starting
and ending date weekdays must be selected in the
program.

The annual program has five time program rows, to which
you can enter both the start and end dates of the time
program with hour and date information and the time
program mode according to which the machine functions
for that time.

Time program does not check for possible overlaps
in programs. The user must ensure that there are no
overlapping programs.

Temperature control

Heat recovery

Heat recovery is limited during summertime, if the
outdoor temperature is over +8°C. During this the heat
exchanger is not operating if no heating request is
received.

Heat recovery is on at 100% efficiency when temperature
is lower than +8°C. This may lead to contradictions,
especially in the spring, when the sun is heating the
indoor air even though the temperature outside is still
under +8°C. The temperature limit value can be changed
from the control panel.

Cooling recovery

During the summertime power limitation, the heat
exchanger activates at full power when the outdoor air
is over 1°C warmer than exhaust air. The heat exchanger

stops, when the outdoor temperature drops below the
exhaust air temperature. This helps with maintaining the
coolness of indoor spaces.

Heat recovery anti-freezing

MD control divides the supply blower operation based on
temperature measurements, which in turn prevents the
heat exchanger from freezing. Supply blower operates
normally after freezing risk has passed. Anti-freezing
automation can be activated from the control panel.

Efficiency of heat recovery

The efficiency of the heat recovery of supply and exhaust
air is displayed in the Measurements menu of the control
panel.

Supply, exhaust, and room
temperature controls

The supply air temperature in the apartment is controlled
by the supply air control. Ventilation unit can be used
either as supply air controlled, which is when the unit
aims to keep the supply air temperature on the set level,
or as exhaust or indoor air controlled, which is when the
unit aims to keep the exhaust or indoor air temperature
on a set constant level by controlling the setting point of
the supply air controller.

The supply air controller makes sure that the temperature
does not drop or rise over the limits set in the panel. If
the outdoor temperature is less than the heat recovery
temperature limit (default value +8°C), or if the ECO mode
is active, the supply air temperature can rise over the set
temperature, if the rise is from heat recovery only.

Exhaust or indoor air temperature constant control is used
when the temperature in the whole apartment needs
to be adjusted by heating or cooling the ventilation unit
supply air. The method of control is standard in ventilation
unit models that have cooling.

If the outdoor temperature is less than the heat recovery
temperature limit (default value +8°C), or if the ECO mode
is active, the exhaust or indoor air temperature can rise
over the set temperature, if the rise is from heat recovery
only.