rada DRV40, Product Manual, Page: 4 / 72

4
The function of this DRV (Digital Recirculation Valve) is to deliver water consistently
at a safe temperature. This requires that:
1.
It is installed, commissioned, operated and maintained in accordance with the
recommendations given in this Manual.
2.
Periodic attention is given, as necessary, to maintain the product in good
functional order. Recommended guidelines are given in the 'Maintenance and
Spare Parts' section.
3.
If this equipment is used in a manner not specified by Kohler Mira Ltd, the
protection provided by the equipment may become impaired.
4. The electrical installation must comply with BS 7671 (commonly referred to
as the IEE Wiring Regulations) and all relevant building regulations, or any
particular regulation or practice specified by the local electricity supply company.
This appliance is to be permanently connected to the fixed electrical wiring
and must be earthed.
SAFETY: WARNINGS
ADVICE
The use of the word ‘failsafe’ to describe the function of any hot and cold water
mixing valve is both incorrect and misleading. This DRV
(Digital Recirculation Valve)
incorporates additional shut-off devices to improve the level of safety however, in
keeping with every other mechanism it cannot be considered as being functionally
infallible.
Provided that the valve is installed, commissioned, operated within the specification
limits and maintained according to this Manual, the risk of malfunction, if not limited,
is considerably reduced.
Malfunction of valves is almost always progressive in nature and will be detected by
the use of proper temperature checking and maintenance routines. Certain types of
system can result in excessive ‘dead-legs’ of pipework. Others allow an auxiliary cold
water supply to be added to the mixed water from the mixing valve. Such systems
can disguise the onset of thermostatic mixing valve malfunction.
Ultimately, the user or attendant
must exercise due diligence to ensure that the
delivery of warm water is at a stable, safe temperature. This is particularly important
in such healthcare procedures as supervised bathing of patients unable to respond
immediately to unsafe temperatures.
Where chloramine/chlorine disinfection is practiced,
DO NOT exceed a chlorine