TECHNICAL CHARACTERISTICS
Operation temperature range
Produced in accordance with
Humidity
Dimensions
Weight
Guarantee
Operation Voltage
Description
Outputs
Contacts
Indicators
Temperature adjustment
Differential
Degrees of cover protection
220 - 240V AC / 50 - 60Hz
Bimetallic contact 10Α (for resistive load)
Switch contact for Boiler 10Α (for resistive load)
ON - OFF / Boiler
Output activation indicator / Boiler activation indicator
ο
5 to 35 C
o
1 C
IP 20
ο
Up to 50 C
Up to 65% relative humidity
86x83x35mm
120gr.
2 years
Bimetallic room thermostat
EN 60730
980901000_09_005
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BS-901
Room thermostat with Boiler
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Olympia Electronics - European manufacturer
GENERAL
The room thermostat is used in areas
where it is essential to control the
temperature. The contact of the thermostat
can activate any heating device.
The thermostat is mounted at a height of
about 1,5 meters and away from doors,
drafts and heating or cooling units.
When the switch of the thermostat is in
the OFF position then the thermostat does
not operate. In the ON position, the
thermostat is fully operational.
The adjustment of the thermostat must be
done 30 minutes after powering the unit.
This time is required in order for the
thermostat to adjust to its surroundings.
Connections
Rotate the adjustment knob to the maximum
ο
position (35 C).Place a flat blade screwdriver in
the notch between the base and the knob and lift
until the knobs comes freely. To separate the
cover from the base, press the retaining tabs,
found on the top and bottom side and pull the
cover.
After removing the cover we can see 6 terminal
blocks that are numbered and shown in figure 1.
First we connect the burner with terminal
3 of the thermostat and with the neutral N of
the mains power supply . Connect terminal
1 of the thermostat with the mains phase
wire L and terminal 4 with the mains neutral
wire. After these connections are made, the
thermostat is ready to operate.
BS-901 has the ability to control the
Boiler function by using the boiler switch,
after connecting the Boiler to the terminal
6, and to the mains neutral wire N and
finally the live wire L to the terminal
5(Figure 1).
Scale adjustment (if necessary).
The thermostat has been pre-adjusted at the
factory. If for any reason, the scale of the
thermostat does not correspond the actual
temperature then it can be adjusted. This
procedure must be done at least 48 hours after
installing the thermostat. To adjust the scale first
measure the temperature near the thermostat
with another thermometer. Subtract this
temperature with the indicated temperature on
the scale of the thermostat. (e.i. If the measured
temperature is 23 degrees and the scale reads
25 degrees then we have 25-23 = 2 degrees
difference). Remove the adjustment knob. This
knob consists of two sections. The external
section(Fig.2) with the anti-slipping area and the
internal area (Fig.3) with the scale On the back
side of the knob we can see a scale with lines.
Each line corresponds to 1 degree.(Fig
.4)
While
