Mira Montpellier Installation, Operation, Maintenance Manual page 24

Performance: check blend stability against known datum (e.g. commissioning
check) for an induced pressure or flow change. Renew Cartridge when necessary.
Function: check inlet pipework temperature for correct function of checkvalves, and
maintain/renew as necessary. Check and clean strainers as appropriate. Lubricate
accessible seals when necessary using silicone-only based lubricant.
Lubricants
Important! Use silicone-only based lubricants for seals. Do not use oil based or other
lubricant types as rapid deterioration of seals may occur.
Standard silicone-only based lubricants may be used on static seals and threads to
assistrefitting.
Service Contracts
To ensure your Rada/Mira products function correctly and give continued safe
performance Service Contracts can be undertaken (subject to site survey).
All Service Contract work is carried out by fully trained Rada/Mira Service Engineers
who carry a comprehensive range of genuine spare parts.
For details on arranging a Service Contract please contact Aftersales/Service.
In-service Tests
The principal means for determining the continuing satisfactory performance of
Type 3 mixing valves is the In-service test.
The In-service test procedure is shown in Figure 6. This should be carried out at both
6 to 8 weeks and 12 to 15 weeks after commissioning the valve. The results of these
tests are used to determine when, after initial commissioning, the in-service test is
next repeated.
Frequency of In-service tests
The 'Guide to in-service test frequency' is shown in Figure7. The in-service test
results over the first 28 weeks after commissioning determine the ongoing frequency
of testing shown in the right hand boxes of the Guide.
Whenever a Cartridge is replaced in a Type 3 mixing valve in a healthcare installation
the in-service test frequency should be re-assessed as if it was a new valve.
Note! In-service tests should be carried out with a frequency which identifies a
need for service work before an unsafe water temperature can result. The general
principle to be observed after the first 2 or 3 in-service tests is that intervals of
future tests should be set to those which previous tests have shown can be achieved
with no more than a small change in mixed water temperature. But in no case
longer than 12 months.
24