Completing The Installation - Heatrae Sadia HI-MAX INSTANT ID 5-60 Installation, Operation And Maintenance Manual

Figure 32: Flushing and fi lling the heating system
Filling loop hose
Filling port
Flush and fi ll
isolation valve
Flushing port
Filling loop
isolation valve

Close the fl ush and fi ll isolation valve located in the
middle of the valve by making sure the butterfl y
handle is horizontal.

Manually open any heating zone valves.

Connect a hose pipe on to the fl ushing port hose
connection and run into a drain (eg a sink). Open
the fi lling port and the fl ushing port on the valve by
ensuring the handles are horizontal.

Open cold water supply valve on the fi lling loop
and fl ush out the system for a few minutes to
ensure that any debris has been removed.

Close the cold water supply valve and the fl ushing
and fi lling ports on the fl ush and fi ll valve.

Disconnect the fi lling loop hose from the cold water
supply isolation valve and connect to a suitable
inhibitor to dose the heating system through the
fi lling loop and fi lling port on the fl ush and fi ll valve.

Once dosed isolate the fi lling port and reconnect
the 1/2" connection of the fi lling loop hose to the
cold water supply isolation valve.

Open up the fi lling port and the cold water supply
isolation valve and pressurise the system to 1 bar g.

Bleed any remaining air out of the radiators /
underfl oor heating system and top up as necessary.

Once pressurised, close the fi lling port and the
cold water supply isolation valve and open up the
isolation valve in the middle of the fl ush and fi ll
valve.

Disconnect the fl ushing and fi lling hoses and fi t
end caps to the fl ushing and fi lling ports and the
cold water supply isolation valve. Keep the fl ushing
port hose connection next to the fl ushing and
fi lling valve for future service work.

Note the fi lling loop braided hose
provides a temporary connection between the
apartment's heating system and the cold water
supply system. It is important that the fi lling loop
braided hose is disconnected after commissioning
in accordance with the water regulations. A pipe
clip is provided in the top left and side of the unit
to safely store the braided hose when not in use.

It is important that the quality of the
heating water is in line with BS EN 14866:2005 and
VDI2035.
CAUTION
All re-circulatory water systems will be
subject to corrosion unless they are fl ushed
and an appropriate water treatment
is applied. To prevent this, follow the
guidelines given in BS 7593 'Treatment
of Water in Domestic Hot Water Central
Heating Systems' and the treatment
manufacturer's instructions.
Treatment must involve the use of a
proprietary cleanser, such as Sentinel X300
or X400, or Fernox F3 and an inhibitor such
as Sentinel X100 or Fernox MB-1.
Full instructions are supplied with the
products. For further information contact
Sentinel or Fernox.
Failure to fl ush and add inhibitor to
the system will invalidate the appliance
warranty.
It is important to check the inhibitor
concentration after installation, system
modifi cation and at every service
in accordance with the inhibitor
manufacturer's instructions. (Test kits are
available from inhibitor stockists.)
For information or advice regarding any of
the above contact Technical Enquiries on:
0844 871 1535.

6.13 Completing the installation

Ensure that the following has been carried out:
1) All hydraulic connections have been made and all
joints are sound in accordance with CIBSE Code W.
2) Check that all air has been bled from the systems.
3) All hot and cold water outlets have suitable fl ow
rates at the taps.
4) Check that the safety discharge pipework is
complete. Manually open the safety relief valve to
ensure they operate and discharge freely.
5) Ensure that the controls temperature sensors are
fi tted in the pockets.
6) Ensure that all motorized valves are plugged in and
are in the auto position.
7) Ensure that all wiring to the control panel and room
thermostat(s) are complete.
8) Ensure that there is a safe means of isolating the
unit from the mains power supply in accordance with
BS EN 7671:2008.

Depending on the size of the building there
will be an element of diversifi cation factored into the
design. As such the centralised plant and pumps are
unlikely to be able to supply 100% of the heat load to
all apartments at any one time. Where extensive parts
of the development are ready to be commissioned
(especially in the depths of winter), this must be done
with a controlled and phased approach to overcome
the initial thermal inertia within the building.
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