!
!
13 Tundish Positioning & Discharge
The
tundish
should
be
vertical,
located
in
the
same
space
as
the
unvented
hot
water
storage
system
and
be
fitted
as
close
as
possible
and
within
500mm
of
the
safety
device (i.e. the temperature pressure relief valve) and must be away from any electrical
device.
The discharge pipe from the tundish should terminate in a safe place where there is no
risk to persons in the vicinity of the discharge, according to Building Regulation G3.
Note:
The discharge will consist of scalding water and steam. Asphalt, roofing felt and
non-metallic
rain
water
goods
may
be
damaged
by
such
discharges.
Where
children
may
play
or
otherwise
come
in
contact
with
discharges,
a
wire
cage
or
similar
guard
must be positioned to prevent contact whilst maintaining visibility.
14 Electrical installation
Wiring
should
be
carried
by
a
competent
electrician
in
accordance
with
the
current
edition of the IEE Regulations.
Thermostats used will have a maximum switching capability (typically 16A / 230V).
If
loadings
are
in
excess
of
this
figure,
a
suitably
rated
contactor
or
relay
must
be
interposed.
An
appropriately
rated
isolator
and
fuses
should
be
installed
to
protect
the
control
and
load circuits.
15. Electrical connections for optional powered anode
In areas of the country that have particularly soft water and therefore poor conductivity
of the water, less than 200 micro-siemens per cm, such as Scotland, Devon and
Cornwall, then magnesium sacrificial anodes may not be fully effective in providing
protection against corrosion. The optional electrical anode protection system is effective
in providing protection in any water conditions.
It
is
essential
that
the
powered
anode
is
provided
with
a
permanent
live
supply
from
a
fused spur adjacent to the tank.
Installation
-
follow
the
manufacturers
instructions
supplied
with
the
unit.
The
requirements for the electrical supply are 230v / 50Hz / 3A.
Wiring
- ensure that the fused spur is non switchable (permanent live).
Ensure that the cable connecting the element to the control panel is suitably protected
and routed providing protection from inadvertent disconnection.
Page
15
of
25
12 Safety Relief Valve Discharge Pipes
It is a requirement of the Building Regulations that any discharge from an unvented
system is conveyed safely to a point that is visible but will not constitute a hazard or
danger to persons in or about the building.
It is the responsibility of the installer to supply and install discharge pipes and suitable
tundishes, in accordance with the requirements of the Building Regulations.
