Multiple Boiler Installations - Aztec EB 897 01 Installation Instructions Manual

ALTERNATIVE METHODS OF FILLING A SEALED SYSTEM
FIG. 8
Safety valve setting (bar gauge)
Vessel charge and initial system pressure (bar gauge)
Total water content of system
Litre
25
50
75
100
125
150
175
200

MULTIPLE BOILER INSTALLATIONS

Important
Where a greater output is required, more than
one boiler can be used in the same system.
However, if installing a circulating pump with a
higher power demand, the PCB circuit protection
fuse may require up-rating from the 630ma one
supplied as standard. Alternatively, the pump
could be wired using a relay. See Wiring
Instructions (page 10) for further details.
The boilers must be fitted side by side using
common flow & returns. For each additional
boiler fitted, it is recommended that the pipe
work is increased in size and the pump set to
deliver the combined flow rates. The circulating
pump will be connected to one of the boilers with
the up-rated PCB fuse.
We strongly recommend the positioning of
isolation valves on the flow and return pipework
of each boiler, as there may be a need to isolate
one or more during servicing. (see Fig. 10)
Please contact the Technical Support team for
further information.
Supplied By www.heating spares.co Tel. 0161 620 6677
PUMP SETTINGS
FIG. 9 FIG. 9
0.5
Vessel Volume
Litre
2.3
4.7
7.0
9.4
11.7
14.1
16.4
18.8
8
3 bar
1.0 1.5
Litre Litre
3.3 5.9
6.7 11.8
10.0 17.7
13.4 23.7
16.7 29.6
20.1 35.5
23.4 41.4
26.8 47.4
Isolation
valve
FIG. 10 FIG. 10