12
DOMITOP HF 24 - 30 E
FERELLA GOLD HF 24 - 30 MEL
Version - 09.2002
Circulator (230v/50Hz)
Located on the heating circuit return, it is connected directly to the exchanger
via special forks and connected to the system via a threaded brass section. It
has three delivery/head levels (see diagram). Changing the delivery/head
changes the speed of the water flowing through the boiler exchanger and as
a result the temperature difference ( T) between heating delivery and return.
Clearly, increasing the delivery of the circulator decreases T and vice versa.
If it is not used for a long time, the impeller might jam due to debris in the water.
With the front screw it is possible to access the impeller, which can be freed with
the aid of a screwdriver. The connection to the expansion tank and the air
separator is installed on the pump casing.
Checks
If the pump doesnt work:
Check that the impeller is free to turn by turning the screw on the front with
a screwdriver.
Check that both the card and the pump connection are powered.
If there is no power supply, check the card.
If there is power, change the pump.
Air separator
This is used to expel the air in the heating circuit automatically and is located
on the pump casing. It is normally accessible either via the fork or by simply
unscrewing it from its seat.
Key
1 - 2 - 3 =
Pump selector position
A =
Losses of head 24kW version
B =
Losses of head 30kW version
m
C.A.
m
3
/h
0
0,5
1
1,5
2
2,5
3
3,5
4
0,6
0,
1
1,
1,
1,
1,
2
2,
2,
2,6
4,5
5
5,5
6
2,8
3
3,2
3,4
3,6
3,8
4
0,4
0,2
0
B
A
3
2
1
Supplied by HeatingSpares247.com
