Aqualvalve 609 Thermo installation instuctions page 5
Impor an informa ion
Pump installation
U DER O CIRCUMSTA CES MUST A PUMP BE FITTED DIRECTLY TO THE WATER MAI
A pump must only be used to boost the pressure from tank-fed supplies. A typical
layout is shown on the reverse of this guide.
Stored water capacities
The minimum capacity of the cold storage cistern should be less than 225 litres (50 gallons). The capacity of the hot cylinder
must be capable of meeting the anticipated demand.
Pressures
The Aquavalve 609 Thermo valve is designed to control static pressure up to 10 bar. Where pressures are likely to exceed 10
bar a pressure reducing valve (PRV) must be fitted into the incoming mains supply. A setting of 3 bar is recommended. It
should be noted that daytime pressures approaching 8 bar can rise above the stated maximum overnight.
The Aquavalve 609 Thermo is not suitable for mixed supply systems, e.g. gravity hot and mains cold.
A suitable PRV is available from Aqualisa.
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 situa-
tions.
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.
CYLI DER TEMPERATURE I EXCESS OF 65˚C MAY RESULT I POOR SHOWER PERFORMA CE
To minimise pressure loss we recommend that the hot and cold supplies are run in 22mm as close as is reasonably possible to
the mixing valve before reducing to 15mm.
A typical layout is shown on page 12 of this guide.
Balanced hi h-pressure system
The Aqualisa Thermo cartridge is designed to operate with unvented hot water storage systems up to a maximum pressure of
10 bar. A PRV must be used if either supply exceeds 10 bar. The cold water supply must be drawn from the same mains supply
as that to the hot water system (down stream of the cylinder manufacturers pressure limiting valve, where supplied) and the
hot supply from the nearest convenient draw-off point. Account must be taken of pressure drops that may occur when other
draw-off points are used while the shower is in use. Pipe work can generally be run in 15mm.
A typical layout is shown on page 12 of this guide.
Combination boiler/multipoint system
The gas water heater must be capable of raising the temperature of the incoming water by 35˚C and delivering a flow rate of
no less than 9 litres (2 gallons) per minute to the shower valve. This is sufficient to operate one outlet point at a time.
The Aqualisa Thermo cartridge is designed to operate from the mains at a maximum pressure of 10 bar. If the mains pressure
exceeds 10 bar a ‘drop tight’ PRV must be fitted on the supply pipe after the main stopcock.
The cold supply can be taken from the nearest convenient mains supply and the hot supply can be taken from the nearest hot
water draw-off point. Account must be taken of the pressure drops that will occur when other draw-off points are used while
the shower is in use. Pipe work can generally be run in 15mm.
A typical layout is shown on page 12 of this guide.
