14
Optima 300
Item 27: Help functions (R9)
Help functions with relay 9 can be used for the following:
If the set-point is configured to 0, the help relay is
•
turned off.
If the set-point is configured to 1, the relay is on when
•
the device is running. This can e.g. be used to open
and close the fresh air and exhaust valve.
If the set-point is configured to 2, the relay is on when
•
there extra heat is required or when you want the
circulation pump to run when heating with the water
after-heat is required.
If the set-point is configured to 3, the relay will be
•
turned on when a change of filter is required. This
can be used to activate an external alarm.
If the set-point is set to 4, the relay will be turned on
•
when extra cooling is required. This function is used if
a pre-heat surface is also fitted to the device.
If the set-point is configured 5, the control system
•
can handle an earth heat-exchanger with the aid of
a valve. The relay will be turned on for one of the
following two conditions:
The outdoor temperature, sensor T9, is lower
1.
than the configured value in item 26 (water frost
temperature, typically set at 5°C).
The outdoor temperature, sensor T9, is more than
2.
1°C above the configured temperature in item 1 and
1°C above the current room temperature.
Example: A water frost temperature of 5°C is selected in
item 26 and a desired temperature of 21°C is selected
in item 1 and the outdoor temperature is 1°C above the
current room temperature T9 sensor.
T9 measures:
5°C
21°C (+1°C)
Valve
Valves
Valve
switches
switches
switches
to earth
to fresh
to earth
heat
air from
heat
outside
If the set-point is configured to 6, then the relay is turned
on when the temperature in the bedroom is 1°C higher
that the value configured in item 40.
The default setting is 0.
Item 28: Device stop
It is possible to ensure that the device cannot stop by
using the button for the icon:
Select the speed in the daily control options by
•
configuring the set-point to OFF. The device will stop
if the set-point is configured to ON.
Item 29: Stop defrosting
The default setting is that the defrosting period ends
when cooling service has reached a temperature of
5°C, which is the default setting. It may be necessary
to change this temperature to a higher value in special
operating conditions where the cooling surface is not
completely defrosted.
The temperature can be adjusted between 0 and 15°C. It
is not recommended to change the default setting without
expert advice.
The default setting is 5°C.
Item 30: Compressor Start/stop
The default temperature difference between start/stop
compressor is ± 0.4°.
It is recommended to change the temperature difference
for special operating situations.
The difference can be adjusted between 0.1 and 1.0°C. It
is not recommended to change the default setting without
expert advice.
The default setting is 0.4°C.
Item 31: Constant ON
If the house’s other heating system is not connected
to the heating pump system, the house’s other heating
system, e.g. boiler, can stop the water pump so that water
pump device with heat exchanger only blows pre-heated
air into all rooms. This will cause increasing problems
with draughts as the temperature falls outside. Devices
without heat exchangers will blow fresh air directly in.
Configuring the set-point to ON will disconnect the room
sensor. The heat pump will always operate and blow
warm air in when the fresh air temperature is below the
temperature configured in item 32. If the set-point is
configured to OFF, the room sensor will regulate the heat
pump regardless of the fresh air temperature. The default
setting is OFF
Item 32: Constant
If constant =ON is connected in item 31, the required
fresh air temperature can be configured.
The temperature can be configured to between 0°C and
10°C.
The default setting is 5°C.
Item 33: Reduce the volume of fresh air
For very low fresh air temperatures, lowering the air
supply volume is recommended in order to improve the
heat pump’s operating conditions and to also achieve a
higher diffusion air temperature, even though the same
volume of air will be taken in. By configuring the set-
