Flow Regulator Removal - Mira EXCEL Installation & User Manual

Flow Regulator Removal

Three flow regulators are fitted to the product. The red regulator fitted to the shower
outlet on top of the Mira Excel BSM limits the maximum flow rate to the shower
fitting. The green regulators are fitted to the hot and cold inlets for high pressure
systems. These must be removed if the inlet pressure is below 1 bar.
For combination boilers a fourth (white) flow regulator is supplied with the product
to make sure that the boiler can supply the Excel BSM with an adequate supply of hot
water. You must replace only the green flow regulator supplied installed in the hot
inlet and replace it with the white flow regulator (supplied).
1. Turn off the hot and cold water supplies.
2. Pull off the temperature control knob.
3. Unscrew the hub screw using the 3 mm hexagonal wrench (supplied) and remove
the temperature control hub.
4. Unscrew the 2 flow divertor lever retaining screws using the 3 mm hexagonal
wrench (supplied) and remove the flow divertor lever and slip ring.
5. Disconnect the shower hose and remove the shower outlet nipple using the quad
key (supplied) or a 12 mm hexagonal wrench.
6. Remove the red shower flow regulator from the shower outlet nipple.
Note! For very low pressure systems (<0.2 bar) a greater shower flow can be
obtained by removing the shower non-return valve from the nipple. If this is
necessary, remove the retaining circlip (using circlip pliers) and push the non-return
valve from the nipple.
7. Carefully push back and lift off the cover shroud and the seal.
8. Unscrew the 2 body retaining screws using the 5 mm hexagonal wrench (supplied)
and lift the body from the manifold.
9. Unscrew the hot and cold inlet non-return valve housing from the manifold using
a suitable spanner.
10. Remove the 2 green flow regulators.
11. Refit both the non-return valve housings and tighten with a spanner in a clockwise
direction.
Note! The plastic housing must be fitted in the hot (left) inlet and the brass
housing must be fitted in the cold (right) inlet.
12. Refit the bath and shower mixer on the manifold and refit the 2 body retaining
screws.
13. Refit the cover shroud and seal.
Caution! Make sure that the front lip of the cover shroud is located into the slot
at the front of the BSM body.
14. Refit the flow divertor lever and slip ring and tighten the 2 flow divertor lever
retaining screws.
15. Refit the shower outlet nipple and the shower outlet hose.
16. Turn on the hot and cold water supplies and check for any leaks.
22