13
Unsuitable Layout for Mira Twin Ended Pump
Fig. 7
Cistern
Pump
DHW
Mixing Valve
11.
The anti-vibration mounting feet and flexible hoses are supplied to reduce
noise transmission, the flexible hoses supplied may be bent to an angle of 30
º
Max. (See Fig 10.) Make sure that any noise is not amplified through loose
panels, pipework or other fixtures and fittings in close proximity.
12.
Either end of the pump is suitable for hot or cold water.
13.
Do not fit a non-return valve in suction line (inlet) pipework to the pump. The
pump must be free to vent to the supply tanks at all times.
14.
Avoid long pipe-runs and make sure pipework is adequately sized for the
minimum flow demand.
15.
Pipework configurations which can allow air locks to form should be avoided.
For inlet pipework, this should be achieved by utilising pipe-runs with a
continuous fall. For outlet pipework, either provide a continuously rising
pipe-run, or if an "up and over" pipe-run is unavoidable, fit a float type automatic
air vent at the highest point as shown (See Fig 3 & 4).
16.
The hot feed from the cylinder must be as illustrated in Fig 2. Side entry cylinder
bosses are not recommended. A drop in cylinder water level could expose a
top entry immersion element. Air in water gathers at the edge of the cylinder,
and in the centre, during the heating process, before travelling up the vent.
17.
Care should be taken when using soldering flux. Protect the pump from damage
whilst making soldered connections as some fluxes cause damage to plastic
components.
18.
All connection pipework must be adequately supported.
