Publication No. 5102977
12 Installation Requirements
Cylinder
The hot water cylinder must be an indirect coil type or a
direct cylinder fitted with an immersion calorifier suitable
for operating at a gauge pressure of 0.3 bar (5 lbf/in²) in
excess of safety valve setting. Single feed indirect cylinders
are not suitable for sealed systems.
Method of Make-up
Provision shall be made for replacing water loss from the
system either:-
i) from a make-up vessel or tank mounted in a position
higher than the top point of the system, and connected
through a non-return valve to the system on the
return side of the hot water cylinder or the return side
of all heat emitters.
or
ii) where access to a make-up vessel would be difficult
by using the mains top up method or a remote
automatic pressurisation and make-up unit as shown
in Fig. 10.
Mains Connection
There shall be no connection to the mains water supply or
to the water storage tank which supplies domestic hot
water even through a non-return valve, without the approval
of the Local Water Authority.
Filling Point
The system shall be fitted with a filling point at low level
which incorporates a stop valve to BS 1010 and a double
check valve of an accepted type to be fitted in this order
from the system mains, see Fig. 10.
Boiler Heat Exchanger:
6.5 litres
Small Bore Pipework:
1 litre per kW of system
output
Micro Bore Pipework:
7 litres
Steel Panel Radiators:
8 litres per kW of system
output
Low Water Capacity Radiators: 2 litres per kW of system
output
Hot Water Cylinder:
2 litres
If the system is extended, the expansion vessel volume
may have to be increased unless provision has been made
for extension. Where a vessel of the calculated size is not
available, the next available larger size should be used.
The boiler flow temperature is controlled at approximately
82°C.
The vessel size can now be determined from the information
in Table 4 where V = System volume in litres.
1.0
1.0
V x 0.087
Vessel Charge Pressure (bar)
Initial System Pressure (bar)
Expansion Vessel Volume (litres)
0.5
1.0
V x 0.11
Table 4.
To size the expansion vessel it is first necessary to
calculate the volume of water in the system in litres. The
following volumes may be used as a conservative guide to
calculating the system volume.
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 in
their 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 open vent unobstructed.
On fully pumped systems either return
connection may be used.
Summary of Contents for Kingfisher Mf CFL40 - 100
Page 13: ...Publication No 5102977 13 CON0093B Installation Requirements Fig 8 Fig 7 ...
Page 14: ...Publication No 5102977 14 Installation Requirements Fig 9 Fig 10 ...
Page 31: ...Publication No 5102977 31 Fig 30 Pictorial Wiring Diagram CON0082B T T B CFL Models Only ...
Page 34: ...Publication No 5102977 34 Fault Finding ...
