
13
Pre-installation
Installation
PumpWise guidelines
General specification
Trouble shooting
PumpWise and warranty
Figure 21
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.
Cold mains
ball valve
Immersion heater
and an indirect
connection to a
boiler
Lid
H
C
Cold
water
storage
MAX
65°C
OLD STYLE DO NOT USED
Fig 19 Pre plumped
MAX
60˚C
Cold mains
ball valve
Cold
water
storage
Immersion heater
and an indirect
connection to a
boiler
Lid
H
C
Figure 22: Pre-plumbed direct or indirect
combination units
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
Small cold water
storage tank
Hot outlet
OLD STYLE DO NOT USED
Fig 21 Fortic tanks
Cold
tank
Hot
tank
Refill ball valves
Immersion
heaters
C
H