Installation; General; Water Connections - Heatrae Sadia Megaflo Eco 70i 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 (Indirect units only)
The boiler should have a control thermostat and non
`
self-resetting thermal cut-out and be compatible
with unvented storage water heaters.
Where use of a boiler without a thermal cut-out
`
is unavoidable a "low head" open vented primary
circuit should be used. The feed and expansion
cistern head above the cylinder should not exceed
2.5m.
Can be a sealed system or open vented type -
`
maximum primary pressure 10 bar.
The boiler cannot be vented through the cylinder.
`
Mains in
22mm compression connection
Figure 6: Pressure Reducing Valve

6.2 Water connections

Refer to the installation schematic (Fig 3, page 9) for
details on the pipework layout. Specific details for the
discharge pipework layout is also provided in Figure 11
on page 18.
Pressure Reducing Valve
Cartridge (3 bar)
Take note of flow
direction
Outlet to Megaflo Eco
From cold water
combination valve
Figure 7: Expansion (Pressure Relief) Valve
WARNING
Under no circumstances should the
`
factory fitted temperature/pressure
relief valve be removed other than
by a competent person. To do so will
invalidate any guarantee or claim.
The cold water combination valve
`
assembly must be fitted on the mains
water supply to the cylinder.
No control or safety valves should be
`
tampered with or used for any other
purpose.
The discharge pipe should not be
`
blocked or used for any other purpose.
The tundish should not be located
`
adjacent to any electrical components.
Pressure Relief Valve
discharge connection
22mm compression connection
T
ake note of flow
direction
Outlet to Megaflo Eco
Pressure Relief Valve
"TEE" ( incorporates
Check Valve )
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