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Port Sleeve
Screens
Port Sleeve
Assembly
Cleaning/Renewal of Parts
13. Internal parts (with the exception of the Thermostat Assembly) can be cleaned
using a mild proprietary inhibited scale solvent e.g. domestic kettle descalent.
After descaling, always rinse parts throughly in clean water before refitting.
Note! The body interior must be cleaned carefully and not damaged in any way.
Do not use any abrasive material.
14. Examine all accessible seals for signs of deformation or damage, and renew as
necessary, taking care not to damage the seal grooves.
15. Lightly smear all seals and threads with a silicone-only based lubricant to
assist re-assembling.
16. Inspect the thermostat assembly for signs of damage.
Note! This component cannot be tested individually, its service condition should
be assessed as part of the performance check; refer to Commissioning Checks.
17. Examine the shuttle seat, the shuttle and the port sleeve for signs of damage or
corrosion; renew as necessary.
Shuttle Seat
Shuttle and Sleeve Assembly (Disassembled)
Shuttle
Return Spring
Figure 7
27
Retaining Cap
Overload Spring
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