Supplied By www.heating spares.co Tel. 0161 620 6677
12
DOMINA PLUS F 24 - 30 E
FERELLA EXTRA F 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 (
D
T) between heating delivery and return. Clearly,
increasing the delivery of the circulator decreases
D
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 doesn't 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. On boilers with
a twin heat exchanger, it 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
mC.A.
5.5
4.5
5
6
4
3
2
1
3.5
2.5
1.5
0.5
0
0
0.25
0.75
1.25
1.75
2.25
2.75
2.5
1.5
0.5
1
2
3
m
3
/ h
B
A
3.2
3.4
3.6
3.8
4
3
2
1
