11
5. Before installation
5.1 Installation regulations
5.2 Installation requirements
The unit should not be used in association with any of
the following:
`
Water supplies that have either inadequate
pressure or where the supply may be intermittent.
(Minimum dynamic pressure 0.5 bar).
`
In areas where the water consistently contains a
high proportion of solids, e.g. suspended matter
that could block the strainer, unless adequate
filtration can be ensured.
`
In areas where the water supply contains chloride
levels that exceed 250mg/L.
For information or advice regarding any of the above
contact Technical Enquiries on: 0344 871 1535.
The unit can be connected directly to the
water supply source provided that a minimum dynamic
pressure of 0.5 bar and maximum pressure of 10 bar.
If the measured inlet pressure exceeds this value then a
pressure reducing valve must be fitted, this is available
through supply partners detail on back page.
5.3 Transport and storage
If the unit has to be stored prior to installation, it must be
in a secure area free from frost, excessive dampness
and humidity.
5.4 Choice of location
The unit must be vertically wall mounted the following
points should be considered:
The unit should be sited to ensure minimum dead leg
distances, particularly to the point of most frequent use.
However there should be a minimum height between
the hot water outlet and the highest draw off point,
outlet tap, of 1.2 meters.
Avoid installations where extreme cold temperatures
will be experienced. All exposed pipe work should be
insulated.
The breather pipe work from the top of the unit should
have a continuous fall, and ideally vent to an outside
wall in a safe manner via the tundish supplied.
Access to associated controls must be available for the
servicing and maintenance of the system, the heater
requires access from the front and underside for this
purpose, refer to figure 6 page 12. Ensure that the wall
the unit is mounted on, is perpendicular and capable
of permanently supporting the weight when it is full of
water
see Table 1 on page 6 for the unit weights.
5.5 Positioning and access
It is important that as much access available is
provided around the unit as is practical. In the event
of a component failure, full access to the front and
underside of the unit is required for servicing. A
minimum of 150mm above the top of the unit must be
kept clear for access, refer to figure 6, page 12.
Access to all isolation valves and control valves in the
water circuits, both hot and cold are also required for
normal operation and servicing.
WARNING
Installation of the appliance must be carried
out by a qualified engineer in accordance
with prevailing and national regulations as
listed below.
`
Building Regulations
`
The Building Standards (Scotland)
`
The Building Regulations (Northern
Ireland)
`
I.E.E Electrical Regs
`
UK Water Regulations
WARNING
`
In the unlikely event that water from the
unit should vent from this breather pipe
then the water could be at an excessive
temperature exceeding 95 degrees.
Therefore it is essential that the
breather pipe work selected is capable
of withstanding this temperature and
must have no obstruction and allow free
and safe passage for this hot water.
CAUTION
`
Ensure that the unit is correctly
positioned. Consideration should
be given to the access and space
requirements for operating and
servicing the unit.
The breather pipe assembly at the top can be
positioned on either the left or right.
Figure 5: Breather pipe assembly
Summary of Contents for R 45 PLUS 3KW
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