Cyclone Direct / Indirect Installation Guide
11
Cold Mains Pipework
Run the cold main through the building to the place where is to be installed. Take care not to run the
cold pipe near hot water or heating pipe work so that the heat pick-up is minimized. Identify the cold
Make the connection to the cold feed of the cylinder and incorporate a drain valve. Position the
inlet control just above the Temperature & Pressure Relief Valve (TPRV) mounted on the side of the
cylinder. This ensures that the cylinder does not have to be drained down in order to service the inlet
for the expansion vessel. Mount it to the wall using the bracket provided.
Balanced Cold Connection
If there are to be showers, bidets or monobloc taps in the installation then a balanced cold supply
is necessary. There is a 22mm balanced connection on the inlet control set.
Fitting The Inlet Control Group
Excess pressure can lead to the cylinder bursting. The inlet control set supplied has an expansion
relief valve with a 15mm connection to allow it to be connected to the tundish. Make sure that there
expansion relief valve.
It is essential that this connection is not covered or closed. The hot water expansion vessel should
Hot Water Pipework
as possible.
of this type can back pressurise the unit and result in discharge.
Expansion Vessel
The expansion vessel receives the increased water volume when expansion takes place as the
system heats up and it maintains a positive pressure in the system. The expansion vessel contains
Select a suitable position for the expansion vessel. Mount it to the wall using the bracket provided
the top of the vessel is accessible for servicing. The pipe connecting the expansion vessel to the
system should have a diameter of not less than 15mm and must not contain any restrictions.
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