Mira Montpellier Installation, Operation, Maintenance Manual page 28

Maintenance Procedure - Checkvalves
Removal
(refer to Figure 4)
1. Isolate the supplies to the shower control, and open the flow control to release
pressure and to assist the draining of residual water.
2. Loosen the nut on the inlet elbow to get access to the inlet connector.
3. Remove the inlet connector and the check valve.
Warning! Some residual water may be released.
Cleaning/Renewal of Parts
4. The interior surface of the shower control body must be clean before refitting the
checkvalve. If scale or deposition is present, clean using a mild proprietary inhibited
scale solvent, e.g. domestic kettle descalent. After descaling, rinse body thoroughly
in clean water before refitting checkvalves.
Note! The body interior must be cleaned carefully and not damaged in any way.
Do not use any abrasive material.
5. Checkvalves may only be cleaned by flushing through under a jet of clean water
to remove lodged particles. Do not descale.
6. Examine all accessible seals for signs of deformation or damage, and if necessary
renew, taking care not to damage seal grooves (a Service Pack is available,
containing all seals and strainer screens that may be necessary for renewal
during maintenance or servicing).
7. Lightly coat all rubber seals with a silicone-only based lubricant to assist
reassembly (see lubricants).
Reassembly
8. Refit the checkvalves.
9. Refit the inlet connector.
10. Tighten the nut on the inlet
elbow.
11. Restore the supplies to the
shower control and check
for any leaks.
Checkvalve
Maintenance - Checkvalves
Figure 4
28
Inlet Connector
Strainer
Inlet Elbow