rada 320, Руководство пользователя, Страница: 23 / 32

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The following practices are intended to support such a routine:
In-service tests
Regular temperature checking in between In-service tests
Maintenance of a log of In-service tests and temperature checks together with details of
cartridge replacements and any other service work.
1. Thermostatic mixing valves only operate correctly when all components have been
serviced and have been tested for correct performance. If any component is faulty,
including the thermostat the valve will not operate correctly and could allow full hot water
to pass through the valve.
2. As with all other thermostatic mixing valves, the critical components will wear over a
period of time and usage.
Note! refer to the 'Safety' section.
Planned Maintenance Programmes (Preventative/Precautionary Maintenance)
The frequency and extent of attention required will vary according to prevailing site and
operational conditions. In applications (such as non-healthcare) where the risks to the user
are too slight to justify the full in-service test procedure and maintenance logging process, the
procedure under Performance check is suggested to cover average duty and site conditions.
In all other cases it is recommended that a routine of preventative maintenance be employed
which is based upon assessment of the risks to the user.
General
1. The maintenance of this product must be carried out in accordance with instructions
given in this Manual, and must be conducted by designated, qualified and competent
personnel.
2. Rada products are precision-engineered and should give continued superior and safe
performance, provided:
- They are installed, commissioned, operated and maintained in accordance with the
recommendations stated in this Product Manual.
- Periodic attention is given as necessary to maintain the product and its associated
installation components in good functional order. Guidelines are given below.
3. The use of main supply-line or zone strainers (recommended maximum mesh aperture
dimension is 0.5 mm) will reduce the need to remove debris at each mixing valve point.
All the mixing valves in this series have functional parts (except the temperature or locking
knob) contained within service-free cartridges, so any maintenance requirement is reduced
to temperature, performance and functional checks and inspection, with cartridge renewal
when necessary. In larger installations with a number of mixing valves, it is good policy to
maintain a small stock of spare cartridges so that no mixing valve or fascility need to be out of
commission for more than the time it takes to exchange the cartridge, and also, eventually, a
rolling programme of cartridge renewal can be undertaken as part of a planned maintenance
procedure.
Maintenance