Mash Bath
I N D U S T R I A L E Q U I P M E N T & C O N T R O L P T Y . L T D .
6 1 - 6 5 M c C l u r e S t . T h o r n b u r y . 3 0 7 1 M e l b o u r n e . A u s t r a l i a
T e l : 6 1 ( 0 ) 3 9 4 9 7 2 5 5 5 F a x : 6 1 ( 0 ) 3 9 4 9 7 2 1 6 6
E m a i l : i e c @ i e c p l . c o m . a u
M A S H B - 2 0 1 9 0 3 1 4 . d o c 1 4 - M a r - 1 9
9
CONTINUE INSPECTION:
Inspect the machine further: Remove rear and front covers by lifting panels and allowing
bottom edges to come forward.
At the rear….. Observe the solenoid valves and hoses. These control mains water in and
drain water out. The third hose is for the important overflow inside the bath that must be
drained through a separate hose.
STIRRER BANKS:
At the front, see the racks of magnetic stirrers with electronic control. The small green
LED indicates that 24V.DC is applied to the stirrer PCB. The 4 connections to each socket
are: top: signal voltage controlling speed. Next: signal negative. Next: 24V.DC..positive.
bottom 24V.negative.
All stirrers on a bank run at the same speed. This speed is controlled by a DC voltage
provided to all the banks by the controller and it is adjustable on the touch panel. To be
sure that each bank is running at the same speed, the speed of each bank is adjusted by a
small control mounted above the connection blocks. Finally, the overall speed of all the
stirrers is then controlled by the touch screen controller.
REMOVE A STIRRER BANK OR A MOTOR:
To remove a stirrer bank, remove the green electrical plugs from the end of the circuit
board, remove the cap screw passing vertically through the aluminium rail at the front
(requires an allen key), Support the weight while extracting the rail from its support hole at
the far end. To change a motor and magnet assembly, undo the 2x wing nuts and remove
the spring washers that hold the motor bracket to the PCB. Unplug the 2x motor wires from
the small socket and unplug the 3x speed control wires from the socket. To fit a new motor,
simply reverse the procedure and tighten the wing nuts firmly with the spring washers fitted,
O
N FLOOR MODELS:
In floor models, at the rear there are 2 additional solenoid valves for the filling of the d/w
tank and for the control of cooling water through the coiled heat exchanger in the d/w tank.
At the front, the stirrer arrangement is the same as the bench models but there could be
several more stirrer banks and there could be up to 5x stirrers on the one bank.
There is another solenoid valve and flow meter on the front of the distilled water tank and
This valve is for feeding the dispensing gun.
The flow meter measures the dispensed volume and can easily be disconnected for
removal. For water tight construction, ‘O’rings are used to seal all joints and threaded
connection fittings are not used. The signals from the flowmeter can be monitored on the
touch screen and the gun switch can be either monitored or simulated from the touch
screen.
An interface housing near the front of the d/w tank provides LEDs for visual indication of
24V.DC. power present, the dispensing gun’s trigger switch operation, the pulses from the
flow meter and the power supply to the flow meter. The solenoid valve has an illuminated
cap to monitor the power to the valve and it can be heard to ‘click’ loudly when opening.
