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SERVICINg
In situations where scale inhibitors have not been fitted and the hot water service
has deteriorated a Torrent can be descaled very easily with equipment available
from Gledhill.
You can now do the whole job easily and efficiently on site - and do it under
the hour.
The operation is carried by a VORTEX DECALOMAT-3 Descaling Unit which removes
the scale chemically. By simply replacing the thermostatic mixing valve on the hot
water outlet with the special adaptor valve supplied, descaling solution is pumped
through the secondary coil (see figure 7). After approximately 45 minutes the job
is done and the mixer valve is put back in place. The solution is made up of kg of
either Sentinel ScaleClean or Fernox DS-3 descaling powder dissolved in 0 litres of
water (preferably warm but not exceeding 70
o
C). The powders are manufactured
with a colour indicator which changes as the active ingredients are used up.
TO DESCALE TORRENT USINg DECALOmAT-3
1.
Before descaling turn the boiler off and run the hot water tap until the thermal
store is below 40
o
C.
.
Turn off the mains water supply at stop tap supplying the Torrent.
3.
Open a hot tap on the hot water system.
4.
Break the three unions securing the Oventrop mixing valve to the Torrent
and remove the Oventrop mixing valve making sure a container is in place
to collect spillage.
5.
Attach the adaptor to the Torrent - two unions and washers.
6.
Close all hot taps on the DHW system.
TO CHARgE DECALOmAT-3
7.
Unscrew the large cap adjacent to the carrying handle.
8.
Make sure that the hoses are connected together with the brass nipple.
9.
Partly fill the Decalomat-3 with 0 litres of Sentinel ScaleClean solution or
Fernox DS-3 solution (the solution should be kg of powder dissolved in
water).
Note: This solution is ACIDIC and mUST be handled with CARE. It is a wise
precaution to do the mixing, filling and emptying outside the premises.
Observe the manufacturers handling instructions.
10. Replace the filling cap on the Decalomat-3.
11. Break the joint between the hose (keeping both hoses above the level of the
Decalomat-3) retaining the brass joining piece.
1. Attach the hoses to the adaptor (ensure that the unions are finger tight on
the ¾” BSP male connectors to the adaptor).
13. Loosen the filling cap on the Decalomat-3 to allow carbon dioxide formed
in the descaling process to escape.
14. Plug the Decalomat-3 to a 40V 50Hz electric supply.
The pump in the Decalomat will now circulate the coloured descaling solution
through the heat exchanger coil of the Torrent. Depending on the degree
of scale formation within the coil, the following may be observed:-
WITH SENTINEL SCALECLEEN
1. The red solution will be observed in one
of the transparent plastic tubes, foam and
an orange/yellow liquid may be seen in
the other tube.
. Flow of the red liquid may initially be
intermittent due to:
a. Gas formation in the coil as the Sentinel
ScaleCleen attacks the scale.
b. Degree of blockage - this stage may exist
for about half an hour.
3. Continuous flow will begin with the red
Sentinel ScaleCleen solution in one pipe
and a foaming solution in the other.
4. If after some time, the colour in both pipes
has turned to yellow (no gas bubbles
are observed), the Sentinel ScaleCleen is
now exhausted and requires changing.
5. When the solution in both tubes remains
red or orange and no gas bubbles are
observed, the coil has been descaled.
WITH FERNOX DS-3
1. The yellow solution will be observed in one
of the transparent plastic tubes, foam
and a greenish blue liquid may be seen
in the other tube.
. Flow of the yellow liquid may initially be
intermittent due to:
a. Gas formation in the coil as the
Fernox DS-3 attacks the scale.
b. Degree of blockage - this stage may exist
for about half an hour.
3. Continuous flow will begin with the yellow
Fernox DS-3 solution in one pipe and a
foaming solution in the other.
4. If after some time, the colour in both pipes
has turned to green (no gas bubbles are
observed), the Fernox DS-3 is now
exhausted and requires changing.
5. When the solution in both tubes is still
yellow and no gas bubbles are observed,
the coil has been descaled.
TO REmOVE DECALOmAT-3
1. Unplug Decalomat-3 from electrical
supply.
. Tighten the filling cap on the Decalomat
3.
3. Remove the two hoses from the adaptor.
4.
Join the hoses with brass connector piece.
5. Remove adaptor.
6. Replace Oventrop mixing valve -
ensuring
that it is the correct way round.
7. Open a hot tap - preferably to a porcelain
sink.
8. Turn on the mains water supply to
Torrent.
9. Allow the system to flush via the open hot
tap for some minutes, then flush out
system at each hot tap.
Содержание Torrent T144 DE
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