
5
1. Location of the pump
The best location for the pump is at the base of
the cylinder. Where it is not physically possible
to locate the pump next to the cylinder, the
pipe run from the hot water cylinder to the
pump must not exceed 5m, ideally in 22mm
with no more than 2m of 15mm pipe to supply
the pump.
1.1 Cooling and ventilation
The pump should be placed in a position where
there is an adequate air flow to cool the motor
and separated from any other appliances that
generate heat. It should be installed in a clear
space allowing 100mm additional space at
each side, the ends and top of the pump.
1.2 Frost protection
Loft mounted pumps must be protected from
frost damage.
2. Hot and cold supplies to
the pump
Never fit the pump directly to the cold water
mains.
Never fit to communal risers (e.g. block of
flats) or secondary circuits that are pumped.
The pump must be fed by exclusive hot and
cold water supplies (i.e. not shared with other
services).
The hot supply pipework to the pump should be
a maximum length of 5 metres in 22mm pipe
(where unavoidable, hot and cold supplies may
have maximum 2 metres of 15mm pipe).
All up and over pipe work must be vented at
the highest point on the outlet of the pump and
a non-return valve (NRV) may require fitting
to the hot outlet only (Note: this is only for the
RP50TU and RP55SU).
2.1 For pumps positioned
above the hot outlet, hot
water cylinder or in a loft
Where the pump is located above the hot
water cylinder, it must be a minimum of
600mm below the cold water cistern. The best
connection is a No-Stop Essex Flange in 22mm
with an Anti-Gravity Loop (AGL) of 400mm
(Figure 7), Alternatively, a top entry flange
may be used. If aearation causes an issue, it
may become a requirement to use an Essex
Flange.
2.2 Cold water storage
Ensure that the cold water storage capacity
is adequate for all of the household
requirements (minimum 50 gallons/227 Litres
per bathroom, 80 gallons/385 Litres for one
bathroom and one en-suite shower room).
Ensure the cold water supplies to the cylinder
and the pump are taken from the opposite side
of the cold water storage tank from the cold
mains inlet.
Figure 1: Tank inlet and outlet position
Please follow these installation instructions carefully. Failure to install your pump in
accordance with these instructions will invalidate your warranty.
Outlet to
cylinder
Inlet
Bottom of cold
tank must be
cleared of debris
Outlet to pump
Summary of Contents for Right Pump Series
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