Biddle HR 25 - Page 12

INTRODUCTION HEAT RECOVERY UNIT
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en
1.5.2 Safety issues relating to installation, mainte-
nance and servicing
Danger:
d The unit may only be opened by qualified
technical staff.
Warning:
w Perform the following actions before opening
the unit:
1. Switch the unit off,.
2. Allow the unit to cool down.
Caution:
c The heat exchanger or, as the case may be, the
heating elements, can get very hot.
3. Disconnect the mains supply (switch off the isolat
ion
swi
tch).
4. If you are going to carry out maintenance or repairs on
el
ectrical components: switch the mains supply group off.
5. For water-heated models:
s
hut off the central heating feed (if possible).
Warning:
w The fins of the heat exchanger are sharp.