HiQu Digital Bath
installation instructions
Page 5
Installation of Digital standard processor (for balanced high pressure and
unvented systems, combination boiler systems and separately pumped
gravity systems)
Pressures: The HiQu Digital standard bath system is designed to operate up to a maximum static pressure of
700kPa ((7 bar)(100psi)). Where pressures are likely to exceed 700kPa ((7 bar)(100psi)), a pressure reducing valve
must be fitted to the incoming mains supply. A setting of 400kPa ((4 bar)(60psi)) is recommended. It should be
noted that daytime pressures approaching 600kPa ((6 bar)(80psi)) can rise above the stated maximum overnight.
Special notes for combination boiler systems
The appliance must have a minimum domestic hot water rating of 24kW (80,000BTU) and be of the type fitted
with a fully modulating gas valve. If in any doubt, please contact the appliance manufacturer before installation
commences.
PLEASE NOTE: DUE TO PERFORMANCE CHARACTERISTICS OF COMBINATION BOILERS, SEASONAL INLET TEMPERATURE
CHANGE WILL AFFECT THE PROCESSOR OUTLET FLOW RATE RESULTING IN VARYING BATH FLOW RATE. THIS WILL AFFECT
PRE-SET DEPTH LEVELS. INLET TEMPERATURE CHANGE MAY ALSO CAUSE THE TEMPERATURE LED’S TO FLASH; THIS IS NOT
NECESSARILY CHANGING THE OUTLET TEMPERATURE.
Special notes for separately pumped gravity systems
We recommend a twin ended pump with a MINIMUM pump rating of 1.5 bar. For optimum performance a twin
ended 2.5 bar pump should be used.
The minimum actual capacity of the cold water storage cistern should be not less than 225 litres (50 gallons).
The capacity of the hot water cylinder must be capable of meeting the anticipated demand.
THIS PRODUCT IS NOT SUITABLE FOR USE WITH A SINGLE ENDED PUMP.
Connections
This product incorporates ‘push fit’ type connections. Tube should be cut using a rotary type cutter and lubricated
using a silicone-based lubricant or petroleum jelly (Vaseline or similar) prior to insertion into the fitting.
If plastic pipe is used, the tube insert must not increase the tube diameter or extend the cut-off length by more than
2mm.
TO MAXIMISE FLOW RATES WE RECOMMEND USING COPPER PIPE WITH THE MINIMUM AMOUNT OF ELBOWS. THESE
FITTINGS ARE NOT SUITABLE FOR STAINLESS STEEL TUBE.
Pipe sizing
Long pipe runs, on both inlet and outlet, will reduce the flow rate at the shower head. If long pipe runs are
unavoidable, use copper pipe rather than plastic. If plastic pipe is used, minimise the number of elbows as the pipe
inserts are very restrictive, consideration should be given to using 22mm plastic or copper pipe.
Flushing
Some modern fluxes can be extremely corrosive and, if left in contact, will attack the working parts of this 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.
After installation
Familiarise the end user with the HiQu Digital bath operation and hand them this guide. Complete and post the
guarantee card or register online at www.aqualisa.co.uk
