8
- Once a suitable location has been identified, the unit should be removed from the
packaging and inspected for any damage
- Carefully move the unit into position
- A maintenance bypass containing full bore isolation valves (not supplied) should be
installed to AccuBoost pipework to allow any maintainence to be carried out without
disrupting the mains water supply to the property. See Figures 1-4 on pages 4 & 5.
- For unpumped versions it is advised to install an inline strainer before the AccuBoost unit.
Pumped versions have an inline strainer incorporated into the design of the pump.
- A double check valve and pressure reducing valve (not supplied) must be installed after
the stopcock on both pumped and unpumped installations. See Figures 1-4 on page 4-5.
NOTE: the maximum system pressure of the AccuBoost system is 8.6 Bar/860 kPa. If this
pressure is exceeded irrepairable damage to the unit, serious injury, death or property
damage could occur. This will also invalidate the warranty of the product. Please consider
pressure spikes that can occur and the fact that the mains pressure may vary at different
times of the day/night.
6.4 System connections
6.3 Pipework
General plumbing
:
- Ensure pipework runs are as short as possible and minimise potential for airlocks.
- To meet the requirements of the water supply (water fittings) regulations, a type EC-
verifiable double check valve should be fitted. Refer to Figures 1-4 on page 4 & 5.
-
Ensure the combined mains pressure and pump pressure does not exceed the maximum
system pressure of 8.6 Bar/860 kPa.
A pressure reducing valve (not supplied) should be
used on the incoming mains before the AccuBoost unit.
- All outlets connected between the mains stopcock and AccuBoost unit must be protected
by non-return valves to prevent backflow of water and air into the AccuBoost unit.
- All pipework must be cross-bonded in accordance with IET Regulations.
Secure pipework
:
- All pipework to and from the AccuBoost unit should be supported with pipeclips.
Flux
:
- Solder joins must be completed and flux residues removed prior to the AccuBoost unit
installation. Solder flux must not come into contact with the presure vessel, pump, base,
anti-vibration hoses or any part of the AccuBoost unit. Flux damage will invalidate any
warranty.
- All associated pipework must be thoroughly flushed before making final connections to
the AccuBoost unit.
Natural water flow:
- A minimum mains water static pressure of 2 Bar/200 kPa is recommended for unpumped
units. Performance and refill times will be improved when the flow rate is higher.
-
Pumped versions are usually recomended when the natural flow rate is below 12 L/min or
the mains static pressure is below 2.0 Bar/200 kPa. For pumped units there must be at
least 2 L/min of natural water flow.