Dynalab A4000D - Manuel (Page 17)

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Connection of
Aquatron stills to
deionised and pre-
treated water
supplies
Many laboratories prefer to feed their
water stills with deionised or pre-treated
water to obviate the need for boiler
cleaning and de-scaling.
Your new Aquatron can be easily
converted to deionised water-feed by
use of a simple accessory – the W ATER
FEED CONVERSION KIT, Catalogue No.
WCK/N. This kit permits the still to
operate with most types of deioniser
and also piped supplies of pre-treated
water. Please contact Bibby or your
laboratory trade house for ordering and
price information.
The sequence of operations to fit the
WCK/N is detailed below:–
1 Assemble the Aquatron as
described under the relevant
ASSEMBLY instructions.
A4000 refer to page 3
A8000 refer to page 7
A4000D refer to page 11
2 Ensure the unit is isolated from the
mains electricity supply.
3 Remove the perspex viewing
screen, the cabinet end-panel and
the cabinet roof.
4 Lift out the front switch panel from
the cabinet groove by unscrewing
the counter sunk screw at the top
of the panel. This will allow better
access to the plumbing system.
5 Identify the length of 9mm vinyl
tubing which connects the side arm
of the Boiler Level Control WL48
and the outlet of the Water Flow
Control Switch (WS48/1 or
WS48/2). Remove the tubing by
unscrewing the plastic screwthread
connector from the WL48 and then
severing the tie strap on the Flow
Switch.
6 From the Water Feed Conversion
Kit WCK/N, take the 1 metre
length of 9mm vinyl tubing. Push
one end of the tubing onto the
OUTLET of the Water Flow Control
Switch, and secure with a tie-strap.
7 Push the free end of the tubing
through the vacant orifice in the
side of the cabinet and lead to the
drain.
8 Take the 220mm length of
reinforced plastic tubing from the
WCK/N kit. Connect the free-end
to the nozzle of the solenoid valve,
item 1, fig 13. Secure with metal
hose clip. Fit the other end of the
tubing to the side arm of the Level
Control WL48, item 3, using the
screwthread connector.
9 Refit the front switch panel and
secure with screw.
10 Take the plastic screwcap, hose
connector and rubber ring from the
WCK/N kit. Fit to the deionised
water inlet, item 2, fig. 13, having
first removed the red protective
cap.
11 Unscrew the screwcap, item 4, fig.
13, from the Level Control WL48.
Remove the glass funnel WF48 and
the rubber ring which are no
longer required.
12 Take the glass float, guide tube and
washer assembly, item 5, and pass
the electric lead and plug through
the hole in the screwcap. Carefully
push the washer into the cap.
13 Refit the screwcap and float
assembly to the Level Control
WL48 ensuring that the end of the
guide tube locates in the well at
the base.
14 Remove the dummy shorting plug
from the socket item, 6, fig. 13,
and fit the plug from the Float
Switch.
15 Replace the cabinet end-plate and
roof.
16 Connect the hose connector, item
2, of the deionised water inlet to
the outlet of the deioniser or pr e-
treated water supply. Note the
tubing selected should have a safe
working pressure of at least equal
to the pressure of the water supply
and should be adequately secured
with hose clips.
1 Before switching on either the
mains electricity or water supply,
identify the control switches and
indicator lights on the front of the
cabinet.
Green Light
When illuminated this shows that
there is mains supply voltage to the
unit. Under no circumstances
should the cabinet end-panel be
removed this light is illuminated.
White ‘ON/Off’ Switch
This is the primary switch for
controlling water and electricity
inside the still. The switch
illuminates when pressed in the ON
position.
Amber Light
When illuminated this indicates
that the distillate collection
reservoir is full as detected by the
level control.
White ‘Clean’ Switch
This shuts off the heating element
but allows water to flow into the
boiler when the still is being
commissioned or cleaned. When
pressed in the CLEAN position the
switch illuminates.
2 Carefully check the following:–
– the appropriate electricity, water
and drain services have been
provided. If in doubt, consult the
LOCATION AND SERVICES
section on page 1.
– the ON/OFF switch on the
control panel is in the OFF
position.
– the CLEAN switch is pressed in
the CLEAN position.
– the Rotaflo Stopcock on the
boiler level control WL48 is
closed.
Operation
Fig 13 Conversion to deionised or pre-treated water supply
Deioniser or
pre-treated water supply
3
2
1
6
4 5