19
Instruction for the installer
3.8 - DOMESTIC HOT WATER CONNECTIONS
(Model “C”)
WARNING!
Before connecting the boiler to the water
mains supply ensure that the system is
flushed out with a suitable product in order
to eliminate any metallic tooling or welding
residues, oil and grime which could reach
the boiler and affect the proper running of
the boiler.
Non-observance of these instructions could
cause injury to persons, animals or damage
to property. The manufacturer shall not be
held liable for any such injury and/or
damage.
The hot water distribution and domestic hot water supply
pipework must be connected to their respective ½ boiler pipe
connections C and F as indicated on page 14.
A
vailable head
(mc.a.)
Flow rate
(Q) l/h
BOILER CIRCULATION PUMP
Graph – Water flow rate/ available head for installation– ALKON 35 kW
The pressure in the system must be between 1
and 3 bar (if the pressure is higher fit a reducing
pressure valve).
WARNING!
The hardness of the mains water supply
conditions the frequency with which the DHW
heat exchanger is cleaned.
In hard water areas the opportunity of fitting
an adequate scale reducing device for
domestic purposes for treating the mains
water supply to the boiler, in compliance to
the DM n°443 dated 21/12/90, should be taken
into consideration.
Where water hardness exceeds 15°f, a scale
reducing device is always recommended.
Ensure yourself that the system’s water and
central heating piping are not used as earth
clamps for the electrical or telephonic system.
They are absolutely unsuitable for this use.
In a short time this could cause serious damage
to the piping, boiler and radiators.
0
50
0,5
100
150
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000 1050 1100 1150 1200 1250 1300 1350 1400
1,0
1,5
2,0
2,5
3,0
3,5
4,0
4,5
5,0
5,5
6,0
6,5
7,0
Summary of Contents for ALKON R 24
Page 47: ......
