4
5
Application notes – continued
4. Isolation valves
Good plumbing practice is to fit full bore isolating valves into the inlet and outlet pipe work of the
pump to facilitate service and removal of the pump. To install immediately after the stop tap, the
isolation valve should be fitted to the pump outlet. To install to a combi boiler only, the isolating
valve should be fitted to the pump inlet.
5. Holding the HomeBoost™/CombiBoost during installation
To hold HomeBoost™/CombiBoost during installation, spanner flats (24mm) have been provided
on the brass neck outlet. See Figure 1. Any tool used to hold HomeBoost™/CombiBoost while the
pipework is connected must be located on the brass portion of the neck to avoid damage to the
polymer pump body.
6. Electrical requirements
HomeBoost™ /CombiBoost must be connected to the electrical supply using the mains cable with
the attached plug. This plug must be connected to an accessible socket that has been installed in
compliance with IET Wiring Regulations.
The plug must be accessible at all times.
If the supply cord is damaged, it must be replaced by the manufacturer, it’s service agent, or
similarly qualified person in order to avoid a hazard.
All pipe work must be cross-bonded in accordance with the IET Regulations.
HomeBoost/CombiBoost™ is supplied with a 3A fuse fitted. Higher rated fuses MUST NOT be
used.
If installed by a Part P qualified installer, the pump may be fitted via a 3A fused mains spur
without invalidating the warranty.
Typical installations
Figure 1: Spanner flats to hold the HomeBoost/
CombiBoost during installation
110mm
square
175mm inlet to outlet vertical height
195mm overall
length including
inlet neck
Spanner flats on brass pump housing
Plastic pump body
Figure 2: Inlet and outlet
Inlet
Outlet
Figure 3: Ideal location
1.
2.
Mains stop tap
Check valve
Combi-boiler
Drain off
Isolating
Ball valve
Tap connector
Tap connector
Isolating
Ball valve
Isolation valve
for combi-boiler
Figure 4: Modified pipe work
for clearance
Pipe centre to wall 37mm
1.
Combi-boiler
2.
Combi-boiler
Figure 5: Typical installation locations
NOTE: Refer to pre-installation checklist for suitability
Figure 6: Earth continuity (4mm
2
earth
connection cable)
Figure 7: Incorrect installation location
NOTE: Refer to pre-installation checklist for suitability
Figure 8: Installation orientation
Inlet
Outlet
Inlet
Outlet
Inlet
Outlet
Inlet
Outlet
✓
✓
✖
NOTE: Pump can be installed horozontally or vertically
but not upside down.