Installation; General - Heatrae Sadia Megaflo Eco SystemFit 145sf Instructions Manual

6. Installation

6.1 General

After reading the previous sections in this booklet and
choosing a good location for the unit please install,
paying attention to the following hydraulic, electrical and
commissioning sections.
Boiler selection
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The boiler should have a control thermostat and non
self-resetting thermal cut-out and be compatible
TO HOT OUTLET
SECONDARY RETURN
TAPPING (IF REQUIRED)
PRIMARY
FLOW
HEATING ZONE 1
HEATING ZONE 2
PRIMARY
RETURN
Figure 6: Typical installation schematic (not to scale)
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BALANCED COLD WATER
CONNECTION (IF REQUIRED)
8 BAR PRESSURE RELIEF VALVE
ELEMENT/CONTROLS
HOUSING
with unvented storage water heaters.
Can be a sealed system or open vented type -
maximum primary pressure 3 bar.
The primary flow from the boiler must be pumped.
Gravity circulation will not work due to the
special design of the primary heat exchanger. It is
recommended that an air bleed point or automatic air
vent is incorporated in the primary return pipework
close to the unvented system.
The boiler cannot be vented through the cylinder.
3 BAR PRESSURE
REDUCING VALVE
STOP COCK (IF USED
IN THIS POSITION)
MAINS WATER
SUPPLY
T&P VALVE
TUNDISH
DRAIN COCK
DISCHARGE PIPE
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