External Controls - Biasi RIVA OV M110.18SM/OV User Manual And Installation Instructions

Open vent water system
with flow and return
connected to bottom
pipes.
Fig. 8.
NOTE: No automatic
by-pass required.
However it is
recommended to leave
one radiator open and
to fit a system bypass
in the DHW circuit to
ensure pump over-run
functionality.
Open vent water
system with flow
and return
connected to top
pipes.
Fig. 9.
3.21 Electricity Supply
a) Wiring external to the appliance must be in
accordance with the current I.E.E Wiring
regulations (BS 7671) for electrical installation
and any local regulations, which apply.
b) The mains cable must be at least 0.75 mm2
(24/0.2 mm) PVC insulated to BS 6500 table
16.
c) THIS APPLIANCE MUST BE EARTHED.
Failure to provide a satisfactory earth
connection will
malfunction.
The RIVA OV appliances may be used with any
certified programmer/room thermostat, as
16
result in appliance
described in section 4. For further information
contact: BIASI UK Ltd Technical helpline: 0121
506 1350.
3.22

External Controls

d) The method of connection to the mains
supply must facilitate complete electrical
isolation of the appliance. Either a 3A fused
three pin plug and un-switched shuttered
socket outlet, both complying with BS 1363,
or a 3A fused double pole switch having a 3
mm contact separation in both poles and
serving only the boiler (and its external
controls) may be used.