AquaFlo Installation, Maintenance and User Instructions
Page 14 of 24
V 2.01 - October / 2012
InSTALLATIon
Installation prerequisites
Zip Aquaflo should only be installed by a competent installer holding their G3 unvented
qualification. The installation of this product is also notifiable under the national building
regulations.
The electrical installation including earthing and cross bonding must comply with the current
IEE regulations and any Local Authority requirements.
requirements
Zip AquaFlo is capable of delivering over 50 litres per minute when connected to a suitable
mains supply. The high quality inlet control set with its 0.3 MPa (3 bar) operating pressure
has been designed to make the most of what is available, however the performance of any
unvented system is only as good as the water supply.
In unvented systems both hot and cold services are supplied simultaneously from the mains so
the maximum possible on-site water demand must be assessed and the water supply should
be tested to ensure it can meet these requirements.
If necessary consult the local water supplier regarding the likely pressure and flow rate
availability.
It is important that site pressure readings are taken under dynamic flow conditions,
high pressures under zero flow conditions are not necessarily indicative of satisfactory
performance. A minimum of 0.15 MPa (1.5 bar) at 20 l/m flow should be available.
Where mains inlet pressures are likely to exceed 1.2 MPa (12 bar) then an additional upstream
pressure reducing device should be fitted.
A minimum of 22mm supply pipe-work should ideally be provided and existing ½” (15mm)
cold mains pipe-work may need to be upgraded. Hard water treatment should be considered in
areas where the calcium carbonate content is greater than 200ppm, if required adjust cylinder
temperature to below 60°C.
This Cylinder should only be installed by a competent installer holding their G3 unvented
qualification. The installation of this product is also notifiable under the national building
regulations.
The electrical installation including earthing and cross bonding must comply with the current
IEE regulations and any Local Authority requirements.
Connecting units in parallel
Multiple
AquaFlo units can be connected together in parallel for applications where higher
storage capacity is required. To connect in parallel, each AquaFlo should be provided with a
separate cold supply while the hot outlets are connected to a common pipeline.
Secondary return
All AquaFlo units are suitable for use with secondary return systems. A dedicated secondary
return connection is provided with a capacity of 210 litres and above. On smaller sizes the
secondary return can be connected to the incoming supply. Always check that the kW loading
available on direct units is sufficient to recover the heat loss in the secondary circuit in addition
to any hot water drawn off.
Содержание AquaFlo II AF3090
Страница 2: ...Inside Back cover Inside Front cover...
