SDHWM.210119
Swegon reserves the right to make changes.
5
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3. Commissioning
Select the functions for the temperature sensors used
and fine adjust the measurements if necessary from
the
Main menu / Settings / (1234) / Heating/cooling /
Sensor/Control
menu.
Outdoor air sensor
Select the SET sensor input to which outdoor air sensor
is connected:
”SET T6 -T9” = SET-connection unit’s Sensor inputs.
(“Internal” = The unit’s internal outdoor air temperature
sensor.)
Relay control functions
Select the heat medium pump function for the SET-
connection unit’s relays. SET Relay 1 / SET Relay 2 = Heat
medium pump.
The commissioning of the battery is performed from the
Heating/cooling
menu
.
Heating function
Put the heating function into service from the menu
item
External liquid coil -> selected.
Heating always occurs primarily through control of
the duct battery, yet if the battery’s heating capacity is
insufficient to maintain the required temperature or if
the freeze protection is activated, a possible internal
electrically powered air heater in the unit is also cont-
rolled. Thus, do not turn off the internal air heater for
after-heating when using external after heating.
Limit value (heating)
Select the required start temperature for external pre-
heating. When the outdoor temperature (transferred
outside temperature) measured before the air heater/
cooler drops below the limit value, the relays in the SET
unit selected for the heat medium pump are activated.
The operating signal is received from the relay output,
for example, the heat medium pump and/or solenoid
valve. A minimum operating time has been established
for the heating medium pump’s control (10 minutes).
Limit value (cooling)
Select the required start temperature for external pre-
cooling. When the outdoor temperature (transferred
outside temperature) measured before the air heater/
cooler rises above the limit value, the relays in the SET
unit selected for the heat medium pump are activated.
The operating signal is received from the relay output,
for example, the heat medium pump and/or solenoid
valve. A minimum operating time has been established
for the heating medium pump’s control (10 minutes).
4. Use
When the unit is commissioned it operates automatical-
ly according to the outdoor temperature. Incoming air
being heated in the winter and cooled in the summer. A
minimum operating time (10 minutes) has been set for
control of the heating medium pump.
5. Service
NOTE!
Disconnect the power to duct battery and venti-
lation unit before servicing..
Service should always be carried out on the duct battery
when servicing the ventilation unit. Check that dirt has
not collected in the air cooler, clean if necessary.
The filter is cleaned by vacuuming and replaced if
necessary. Order new filters (W2504FSS) from the web
casastore.fi.
The inlet side of the air cooler is cleaned first with a
brush, and then you can clean the entire air cooler. If
the compressed air is used, blow off dirt in the direction
from the output side towards the input side. Be careful
so that the thin edges of the fins are not damaged.
Any dirt that has accumulated on the bottom of the
condensate tray can be wiped off using a cloth and mild
detergent. The function of the water trap and drainage
pipes for condensate water should be checked at least
twice a year by pouring water in the bottom of the
condensate tray.
Summary of Contents for CASA SDHW250F
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