Flushing
Some modern fluxes can be extremely corrosive and, if left in contact, will attack the working parts of the unit. All
soldering must be completed and the pipe work thoroughly flushed out in accordance with current Water Supply
Regulations prior to connection of the product.
Filters
To ensure ongoing optimum performance, the internal control mechanism ‘cartridge’ is protected by a two-part
filter system. Debris accumulation may result in reduced flow from the shower head and noisy operation.
As this condition is not covered by our standard warranty terms, it is suggested that the cartridge be removed and
the filters checked by a competent person. In the event of any difficulties please contact the Aqualisa customer
helpline for assistance.
Isolating valves
Suitable full way isolation valves must be fitted to both supplies in accordance with current Water Supply
Regulations and our terms of warranty.
Due to their restrictive characteristics, stopcocks and ball type valves that reduce the pipe bore size must not be
used on gravity and boosted gravity installations.
Pressures
The Dream cartridge is designed to operate from the mains at a maximum of 10bar. If the mains pressure likely to
exceed 10bar, a ‘drop tight’ PRV must be fitted on the supply pipe after the main stopcock. A setting of 3bar is
recommended. It should be noted that daytime pressures approaching 8bar can rise above the stated maximum
overnight.
A suitable PRV is available from Aqualisa.
Dream products are not suitable for mixed supply systems, e.g. gravity hot and mains cold.
Gravity fed hot and cold supplies
Services must be installed according to good plumbing practice having regard to pipe sizing, long pipe runs and low
head situations.
The cold supply for the valve assembly must be taken directly from the cold water storage system. The hot supply
may be taken from the vent/draw off pipe of the hot water cylinder at a point below the cylinder connection or
alternatively from the underside of the horizontal draw off.
Rising pipe work must NOT be connected into the horizontal draw off from the cylinder or to any point in the
vent/draw off pipe above the cylinder connection.
CYLINDER TEMPERATURE IN EXCESS OF 65°C MAY RESULT IN POOR SHOWER PERFORMANCE
To minimise pressure loss we recommend that the hot and cold supplies are run in 22mm as close as reasonably
possible to the mixing valve before reducing to 15mm.
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Dream installation guide:Dolphin install Guide 18/1/11 09:50 Page 4
