Supplied By www.heating spares.co Tel. 0161 620 6677
9
UNICA BHE
fig. 6
3A.6.8 FREQUENT FILLING
Frequent filling or venting of the system may be
indicative of a leak. Care should be taken during
the installation of the appliance to ensure all
aspects of the system are capable of withstanding
pressures up to at least 3 bar.
3A.7
ELECTRICAL SUPPLY
The appliance is supplied for operation on 230V @
50Hz electrical supply; it must be protected with a
3-amp fuse. The method of connection to the
mains electricity supply must allow for complete
isolation from the supply. The preferred method is
by using a double-pole switch with a contact
separation of at least 3,5 mm (3° high-voltage
category). The switch must only supply the appli-
ance and its corresponding controls, i.e. time
clock, room thermostat, etc.
3A.8
MOUNTING ON A COMBUSTIBLE
SURFACE
If the appliance is to be fitted on a wall of combus-
tible material, a sheet of fireproof material must
protect the wall.
3A.9
TIMBER FRAMED BUILDINGS
If the appliance is to be fitted in a timber framed
building, it should be fitted in accordance with I.S.
813 and local Building Regulations.
The Institute of Gas Engineers publication (IGE/
UP/7) ‘Guide for Gas Installations in Timber Frame
Buildings’ gives specific advice on this type of
installation.
3A.10 INHIBITORS
Vokera recommend that an inhibitor - suitable for
use with aluminium heat exchangers - is used to
protect the boiler and system from the effects of
corrosion and/or electrolytic action. The inhibitor
must be administered in strict accordance with
the manufacturers instructions*.
*Water treatment of the complete heating system
- including the boiler - should be carried out in
accordance with I.S. 813 and the Domestic Water
Treatment Association’s (DWTA) code of prac-
tice.
3A.11 SHOWERS
If the appliance is intended for use with a shower,
the shower must be thermostatically controlled
and be suitable for use with a combination boiler.
3A.12 DECLARATION OF CONFORMITY
A Declaration of Conformity (as defined in I.S.
813) must be provided on completion of the in-
stallation.
A copy of the declaration must be given to the
responsible person and also to the gas supplier if
required.
fig. 8
Default screws position of fixing jig: No. 3
C/H return
valve
C/H flow
valve
Gas
cock
Hot water
outlet
Cold water inlet
stopcock/filling
valve
fig. 7