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Fully Pumped Sealed System
Fig. 10
Circulation Pump Selection
The resistance through the heat
exchanger when operating with a
water flow rate producing an 11°C
temperature rise at maximum boiler
output are shown in Table 5. If other
controls such as 3 position valves are
used in the system, the resistance
through
them,
quoted
manufacturers literature must be taken
into account. The pump may be fitted
on either flow or return. It must be fitted
with two isolating valves which are
positioned as close to the pump as
possible. Closing of any valve must
always
leave
the
unobstructed.
On
systems either return connection may
be used.
14 Installation Requirements
in
their
open
vent
fully
pumped
CON0015C
Publication No. 5102977
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