Heatrae Sadia Megaflo Eco 125DD, Руководство пользователя

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All connections accept 22mm outside diameter
pipe (compression nuts and olives supplied). The
thread rate is 3/4" BSP Male parallel to accept
standard 3/4" BSP Female fittings if required.
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The Cold Water Inlet Control kit supplied
incorporates a full flow isolating valve which will
enable the Megaflo Eco to be isolated from the
mains supply for maintenance or servicing.
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The location of the unit should allow access to the
T&P Relief Valve to allow re-charging of the internal
air gap when necessary.
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The draining tap supplied should be installed in
the cold water supply to the cylinder between the
expansion valve and the heater at as low a level
as possible.
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It is recommended that the outlet point of the drain
pipework be at least 1 metre below the level of the
heater (this can be achieved by attaching a hose to
the drain tap outlet spigot).
Cold water control pack
CAUTION
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Flush supply pipework before
connection to remove all flux and
debris prior to fitting the inlet controls.
Failure to do this may result in
irreparable damage to the controls and
will invalidate any warranty.
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The cold water control pack can be connected
anywhere on the cold water cylinder supply.
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The control pack incorporates the strainer, check
valve, core unit and expansion relief valve.
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The pressure setting is set to 3.0 bar.
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The valve can be fitted in any orientation to suit
the installation as long as the valve is installed with
the direction of flow arrows pointing in the correct
direction.
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The expansion relief valve should be installed with
the discharge pipework in either the horizontal
position or facing downwards.
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No other valves should be placed between the cold
water combination valve and the cylinder.
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The blank plastic plugs in the body of the pressure
relief valve are pressure gauge connections to
enable pressure monitoring to be carried out, should
the system develop a fault. It is recommended that
these be accessible (the pressure reducing valve
has two – only one need be accessible).
Primary circuit control
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The 2 port motorised valve supplied with the
cylinder MUST be fitted on the primary flow to the
cylinder heat exchanger and wired such that in the
event of the cylinder overheating it will close the
primary circuit.
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Primary circulation to the cylinder heat exchanger
must be pumped; gravity circulation WILL NOT
WORK.
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It is recommended that an air bleed or automatic
air vent is incorporated in the primary return pipe
work close to the unit.
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Boiler flow temperature should be set to 82°
(maximum flow temperature to primary heat
exchanger 88°C).
Figure 8: Cold water controls - installation combinations
Stopcock can be grouped with either
3 bar Pressure Reducing Valve or
8 bar Pressure Relief Valve on the
inlet to either valve only
8 bar Pressure Relief
Valve
3 bar Pressure
Reducing Valve
Stopcock