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7.5
Mains power supply
• Connection voltage 1 ~ 230 V.
• Fuse on mains side 10 A slow-blow.
• Residual-current-operated protection switch acc. to IEC 345.
7.6
Electrical connection alarm
DANGER! Risk of fatal injury!!
Improper electrical connections can lead to fatal electrical shocks. Electrical
connection may only be carried out by an electrician authorised by the local
electricity supply company and in accordance with the applicable local reg-
ulations [e.g. VDE regulations]. Before establishing the electrical connection,
ensure the unit is disconnected from the power supply.
NOTE: When connecting the alarm cable to the condensing boiler or the
alarm switchgear, observe the corresponding operating instructions for the
device.
• Connect an alarm cable (Fig. 1, item 7) with stripped cable ends to the connection
of the condensing boiler.
• Earth the system according to regulations.
• Maximum contact load 250 V / 1 A
The alarm contact (Fig. 5a, item b) is factory-set as a potential-free normally closed
contact (Fig. 5b). The contact opens when the alarm level is reached.
To use the alarm contact as a normally open contact (Fig. 5a), follow the steps below:
• Undo the fixing screw (Fig. 1, item 10) of the housing cover.
• Press in the housing clips (Fig. 2, item 6) and remove the housing cover.
• Pull the blade receptacle (Fig. 5b, item 2) off the centre contact of the alarm switch.
• Attach the blade receptacle to the top contact (Fig. 5b, item 1).
• Put the housing cover back in place and press down until the housing clips (Fig. 2,
item 6) audibly click into place.
• Fasten the fastening screw (Fig. 1, item 10).
CAUTION! Risk of damage!
The alarm contact must be connected in order to ensure that the whole system
(condensing boiler or cooling device) switches off in case of an overflow. Fail-
ure to ensure that the alarm contact is connected could result in you being
held liable for the results of such a situation.
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