11
Ground Source Heat Pumps Since 1983
2.9. Electrical installation
Only qualified electricians are permitted to carry out electrical work on the heat pump according to general regulations.
Device
T 10 / P 10
T 13 / P 13
T 15 / P 15
T 21 / P 21
T 31 / P 31
Electrical connection
400V 3N~
400V 3N~
400V 3N~
400V 3N~
400V 3N~
Fuse size (slow)
A
3 x 16 C
3 x 16 C
3 x 16 C
3 x 25 C
3 x 25 C
The Lämpöässä heat pump is connected to a 400 V (50 Hz). The Lämpöässä heat pump has been fitted with an
integrated electrical switchboard to which is permanently powered. A plastic-coated wire is used as a supply line.
This wire travels to the master switch in a casing pipe.
2.9.1. Main switch
The main switch must install before other installations.
2.9.2. Sensors
The master switch must be installed before any other installation takes place. In order for the outdoor sensor to
recognise weather conditions as effectively as possible, it is very important that it be placed in the correct location.
The outdoor sensor should be placed on the north-western or northern side of the building to avoid the effects of
the morning sun. If the sensor cannot be placed as recommended, ensure that it is protected from direct sun light.
The sensor is placed approximately 2/3 of the way up the wall of the building near the corner. A sensor should not be
placed under a roof, in a place protected from the wind or over a vent, doors or windows where the temperature is not
the normal outdoor temperature. In order for the room sensor to detect average indoor temperatures as reliably as
possible, it must be placed in a central and open location, for example a hallway between several rooms or the
staircase. String a bipolar electrical line (at least 0.5 mm
2
) from the heat pump to the room sensor. Position the room
sensor approximately 2/3 of the way up the wall. Connect the room sensor lead to the heat pump. Please note! Leads
must be correctly connected in order for the heat pump to operate.
In order to obtain the best results, the room sensor and leads can be tested in diffirent locations before being per-
manently installed.
Ouman 201
Connection strip
Cable type
Outdoor sensor
1
2 X 0,75 mm2
Room sensor (equipment)
3
2 X 0,75 mm2
Flow sensor
2
2 X 0,75 mm2
Hot gas sensor
11
2 X 0,75 mm2
Sensor, lower part
10
2 X 0,75 mm2
Sensor, upper part
9
2 X 0,75 mm2
Ouman 203
Connection strip
Cable type
Outdoor sensor
1
2 X 0,75 mm2
Flow sensor HC1
2
2 X 0,75 mm2
Room sensor HC1 (equipment)
3
2 X 0,75 mm2
Flow sensor HC2
5
2 X 0,75 mm2
Flow sensor DHW
7
2 X 0,75 mm2
Sensor, upper part
9
2 X 0,75 mm2
Sensor, lower part
10
2 X 0,75 mm2
Hot gas sensor
11
2 X 0,75 mm2
Room sensor TMR (equipment): connection from sensor to room space.
