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Installation and User Instructions R02889-3 04/14
Page 15
Installation
- Where a manifold is used it should
be sized to accept and discharge the
total discharge from all the D1
discharge pipes connected to it.
- The discharge pipe work from the
expansion relief valve must be
installed constantly falling to an
open point of discharge. It is
recommended to combine it with
the discharge of the temperature
and pressure relief valve.
Note: The T&P valve is pre-sealed
and if moved the seal will be
broken, should this occur, it will
need to be resealed with an
appropriate sealant (Dimplex part
number R00836-1).
5.3.2 Discharge Pipe D2
For a detailed description of the
discharge pipework D2 see chapter
4.4.1.
5.3.3 Tundish
- The tundish should be vertical,
located in the same space as the
unvented hot water storage system
and be fitted as close as possible to,
and lower than, the safety device,
with no more than 600mm of pipe
between the valve outlet and the
tundish (see Figure 2).
- Discharge should be visible at the
tundish, where discharges may not
be apparent, e.g. in dwellings
occupied by people with impaired
vision or mobility, consideration
should be given to the installation of
a suitable safety device to warn
when discharge takes place, e.g.
electronically operated.
Note: To comply with the Water
Supply (Water Fittings)
Regulations, the tundish should
incorporate a suitable air gap.
It is important that the tundish
is positioned away from any
electrical components.
5.4 Immersion Heaters
The main immersion heater and boost
immersion heater supplied with this
cylinder come pre-wired. A supply
cable shall be connected to the unit
through the entry in the electrical
enclosure, at the bottom of the
cylinder. Details are given on how to
do this in section 5.5 of this manual.
The electrical wiring diagram for the
product is shown in Figure 9.
The immersion heater incorporates an
independent non self-resetting over
temperature cut-out. Should the over
temperature cut-out operate, the
reset pin will be pushed upwards, and
become level or slightly proud of the
cover at the position marked “Safety”,
and the water in the cylinder will fail
to heat. This denotes a fault
somewhere in the system and an
appropriate investigation shall be
carried out before the cut-out is reset.
Use a suitable sized implement to
reset the pin by pushing it hard into
its original position.
Should it be necessary to remove the
thermostat from the immersion
element, ensure that the contacts are
re-fitted correctly into the positions on
the element. Failure to do so carries
the risk of overheating the contacts
and thus damaging the appliance. A
torque of 40 Nm is recommended
when tightening up the immersion
after it has been removed and
refitted. The immersion heater
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