14
Pre-installation
Installation
PumpWise guidelines
General specification
Trouble shooting
PumpWise and warranty
Pre-plumbed direct or indirect
combination units
These are purpose-made units typically for
use in multiple flat developments, usually in
towns and cities where it is advantageous
and desirable to provide the occupants with
completely independent hot and cold
water services.
In these systems the ideal pump is an
RP50/75 TU. For alternative types of
combination units see Elson, Figure 23 and
Fortic (type), see Figure 24.
Figure 22: Pre-plumbed direct or indirect
combination units
MAX
60˚C
Cold mains
ball valve
Cold
water
storage
Immersion heater
and an indirect
connection to a
boiler
Lid
HC
Elson (type) tanks
In these systems it is important to ensure
the hot and cold water storage capacity is
adequate for the type of pump to be used.
The refill ball valve on the small cold tank
which refills the hot tank is correctly set to
prevent aeration of the hot supply water to
the pump.
Figure 23: Elson (type) tanks
Fortic (type) tanks and
pre-assembled units
Typically used in very small flats and houses.
Not usually with sufficient water capacity of
cold water for pumped systems.
Figure 24: Fortic (type) tanks and
pre-assembled units
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