Heatrae Sadia Megaflo Eco 125DD, Manual

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6.4 Filling the installation
`
Ensure the drain cock is CLOSED.
`
Open a hot tap furthest from the cylinder.
`
Open the mains stop cock.
`
Open the isolating valve (fitted to either the
Pressure reducing Valve or Expansion Relief
Valve) by turning the blue handle so it is parallel
with the direction of flow. It should be fully opened,
partial opening will restrict the inlet flow rate.
`
Allow the unit to fill. When water flows from the tap,
allow to run for a few minutes to thoroughly flush
through any residue, dirt or swarf, then close the
tap.
`
Open successive hot taps to purge the system of
air.
`
Check all connections and system pipes for water
tightness.
WARNING
Should the Megaflo Eco be used in
conjunction with a boiler that controls the
water temperature via a sensor connected
to the boiler controls it should be noted that
the factory fitted indirect thermostat and
thermal cut-out MUST NOT be disconnected
or bypassed. To do so would invalidate
the product approvals and warranty and it
would not comply with Building Regulations.
Should this method of control be adopted
the Megaflo Eco Indirect thermostat should
be set at maximum and the boiler cylinder
control temperature set at 60
o
C to avoid the
thermostat over-riding the boiler control.
Where the boiler control does not directly
power the 2 Port Motorised Valve supplied
with the Megaflo Eco, the wiring should
ensure that in the event of the thermal cut-
out on the Megaflo Eco Indirect controls
operating power will be interrupted to the
2 Port Motorised Valve such that it closes
and prevents flow of the primary heating
fluid around the Megaflo Eco primary heat
exchanger coil.
For further details of wiring the boiler,
consult the boiler manufacturer’s installation
instructions.