Mira Advance ATL Installation & User Manual page 43

9. Draining the Mira Advance ATL
The remaining maintenance procedures require that the Mira Advance ATL is drained.
9.1. To drain the Mira Advance ATL:
9.1.1. Remove the shower hose.
9.1.2. Remove the inlet shield.
9.1.3. Remove the hose outlet connector retaining screws.
9.1.4. Locate release tab of hose outlet connector, underneath the flexible
outlet pipe.
9.1.5. Rest a screwdriver on the interconnecting pipe to flow valve. Gently
lever the tab upwards.
Caution! Do not try and force the outlet connector off by hand.
9.1.6. Move the flexible outlet pipe away to the right of flow valve.
9.1.7. Lift and partially separate the flow valve from the outlet of heater tank.
Allow the water to drain out of the bottom of Mira Advance ATL.
9.1.8. When relevant maintenance procedure has been completed, refit in
reverse order.
9.2. To renew the flow valve:
9.2.1. Refer to Section 12, Maintenance: "9.1. To drain the Mira Advance
ATL" and follow instructions 9.1.1. to 9.1.7. inclusive.
9.2.2. Remove the flow valve turbine and inlet sensor connector lead (5 wires)
from the relay board.
9.2.3. Remove the flow valve solenoid connector lead (2 wires) from the relay
board.
9.2.4. Remove the inlet clamp retaining screws and clamp.
9.2.5. Separate the flow valve from the tank body and the inlet connector.
9.2.6. Renew the flow valve.
9.2.7. Refit the remaining components in reverse order. Make sure that the
wiring is correctly routed and clears the flow valve air bleed button, and
that all the screws are tight.
9.3. To clean the flow valve turbine:
9.3.1. Refer to Section 12, Maintenance: "9.2. To renew the flow valve"
and follow instructions 9.2.1. to 9.2.5. inclusive.
9.3.2. Remove the three flow valve turbine and inlet sensor retaining screws.
9.3.3. Separate the turbine from the housing.
9.3.4. Clean the turbine and the annular groove in the housing in which the
turbine rotates.
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