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6
3.2
location & Clearances
1. The Assure SHRU has been developed for dwellings with the
bathroom on the second or higher floor, so that when taking a shower
the wastewater flows under natural conditions through the heat
exchanger installed on the floor below the bathroom.
2. Therefore, the unit must be mounted vertically securely onto a flat wall
with the supplied.
It is recommended that the SHRU is installed in a location where all parts
of the unit are accessible and routine maintenance such as cleaning can
be carried out with reasonable ease.
3. Prevent the SHRU from being heated above 25°C by an external
source. Also, the SHRU must not be located where ambient
temperatures may be above 25°C.
4. The preheated water supply inline of the SHRU must be insulated in
accordance with the requirements of the 'Building Services Compliance
Guide'.
Note: Do not insulate the SHRU itself.
It is required that the distance from the shower tray to the SHRU is kept
to within 3 metres to reduce any heat losses and ensure good efficiency
is maintained. Minimum clearances of 80mm around the main body
should be maintained and adequate clearances must be maintained at
the top and bottom to ensure all components are accessible and can be
cleaned or replaced, if necessary.
3.3
Installation Recommendations
1. When showering with the SHRU installed, the cold water inlet
temperature will increase slowly because it will be warmed from the heat
transferred from the waste water, via the SHRU heat exchanger.
2. If a non-thermostatically controlled showerhead is fitted, continued
adjustment of the valve will be required to avoid hotter water
temperatures from the shower. Therefore, it is required that a
thermostatically controlled showerhead is always fitted.
3. Ensure full flow shut off valves are fitted at both connections of the
unit to allow for any replacement of parts.
4. The cold/preheated feed pipe work to the shower from the SHRU must
be plumbed up to the T connection at the thermostatic mixing valve of
the shower, and then from this T connection to the cold inlet of the
combination boiler or hot water store. This will ensure static water is not
held in the line for long periods without being flushed, providing other hot
water taps are being used.
5. After installation all domestic water pipe work should be flushed and
cleaned. This also applies if a system has been substantially altered.
However, this would be required even if a shower heat recovery unit had
not been fitted. (Refer Approved COP – L8 for guidance)
6. Pipework between the SHRU preheated water outlet and the water
heater and /or shower cold water inlet(s) (depending on installation
configuration) must be labelled to indicate that no other services can be
interconnected.
7. The hot water store or combination boiler must be set to provide and
distribute hot water at a temperature of at least 60°C.
Vert SHRU
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