Pumps; Impellers; Magnetic Coupling; Noisy Impellers - Ugolini ARCTIC COMPACT Service Manual

3 PUMPS

Arctic Deluxe series dispensers are equipped with spray
pumps. Each pump is magnetically driven by an independent
electric motor.
These machines are equipped with one Main Switch to power
ON and OFF refrigeration and with one Pump Switch for each
bowl (see user manual for controls details).
Spray pumps are suitable for a large variety of products but it is
better not to spray coffee, tea, natural juices or other beverages
that can foam. To avoid spray on these machines it is necessary
to replace the original impeller with a different one (grey impeller
pn 33900-01201) and to remove the spray tube from the bowl.
In addition the original bowl can be replaced with a dedicated
one (pn 22900-00010 or 22900-04810) to perform even more
gentle agitation.
Arctic Compact series dispensers are equipped with
submerged pumps. On double machines the pumps are driven
by only one motor through a transmission belt and three pulleys.
This motor also works as a fan. On triple machines two pumps
are driven by one motor with the same system of double units
and the third is driven by a single motor. On four bowls machies
the pumps are driven by two motors (see figure 3).
These machines are equipped only by one Main Switch to
power ON and OFF all the functions, refrigeration and pumps.
Submerged pumps are suitable for almost all kind of beverages
and particularly for coffee, tea, natural juices or other beverages
that can foam. In case of need it is possible to equip Arctic
Compact dispensers with spray pumps replacing the impellers
(pn 33900-01204 or 33900-01205), the bowls (pn 22900-01900,
22900-02000, 22900-00000 and 22900-04800) and installing
the spray tubes.
The following table summarizes all the available impellers:
PART COLOUR BOWLS
CAPACITY
NUMBER
[litres]
33900-01200 WHITE 12, 20
33900-01201 GREY 5, 8, 12, 20 SUBMERGED 230V 50HZ, 240V 50HZ
33900-01204 BLUE 5, 8
12, 20
33900-01205 RED 5, 8
figure 3
MIXING VOLATGE
SYSTEM
SPRAY 230V 50HZ, 240V 50HZ
115V 60HZ, 220V 60HZ
SPRAY 230V 50HZ, 240V 50HZ
SPRAY 115V 60HZ, 220V 60HZ
SPRAY 115V 60HZ, 220V 60HZ
The following table summarizes all the available bowls:
PART
NUMBER
22900-01900
22900-01910
22900-02000
22900-02010
22900-00000
22900-00010
22900-04800
22900-04810
And the following one specifies all the available spray tubes:
PART
NUMBER
22900-00202
22900-00203
22900-00201
22900-00200
Combined configuration can be realized for particular needings.

3. 1 IMPELLERS

The impeller must spin freely on its pivot to perform efficient
mixing and cooling. For this purpose keep clean both the
impeller and the pivot from traces of sugar, pulp or other. If
necessary, lube the parts with food grade lubricant.
A self-lubricating washer is moulded into the bottom of the
impeller. Regularly check this part and, if worn, replace the
impeller with a new one (see figure 4).

3. 2 MAGNETIC COUPLING

The impellers are magnetic coupled with their respective
motors. The magnetic gap is factory preset and does not require
to be adjusted. In case of loss of magnetic lock, one or more of
the following problems can be present: bent pump motor bracket
due to a transport shock, impeller improper spinning due to
worn, damaged or dirty parts.

3. 3 NOISY IMPELLERS

In case of noisy impellers, it is necessary first of all to remove
them from the pivots and power the unit on. If the noise is still
present it is necessary to power the unit off, unplug it and
remove the panels in order to check the pumps motors
assemblies. Possible causes of noise can be the following:
faulty electric motor, improper magnetic alignment due to a bent
5
BOWLS MIXING
CAPACITY
SYSTEM
[litres]
5 SPRAY
5 SUBMERGED
8 SPRAY
8 SUBMERGED
12 SPRAY
12 SUBMERGED
20 SPRAY
20 SUBMERGED
BOWLS
CAPACITY
[litres]
5
8
12
20
figure 4