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
2 7
THE BATH CIRCULATION PUMP MOTORS:
BENCH MODELS HAVE BATH CIRCULATION ONLY.
FLOOR MORDELS HAVE BOTH BATH AND DISTILLED WATER TANK
CIRCULATIONS TOGETHER WITH DISPENSING OF DISTILLED WATER.
THE BATH CIRCULATION PUMP MOTOR (in d/w tank – floor models only):
If a circulation pump motor stops, first be sure it is not manually switched off in the Control
Unit display. If not switched OFF, first check the fuse to the motor. The bath circulation
fuse is one of the horizontal fuses inside the control unit. It is marked “BATH PUMP”. It is
a 3 amp fuse. On floor mounted units, the distilled water circulation and dispensing motor
fuse is the other horizontal 3 amp fuse above the bath pump fuse and is marked “D/W
PUMP”.
TO REPLACE A CIRCULATION PUMP MOTOR:
On bench models, open the spare parts
package, remove the spare pump DC motor. Turn off the power to the machine.
Remove the lid of the mash bath for access and also remove the long rear cover over the
electrics.
NOTE::
If the cable is disconnected from the Control Unit, it can remain
mounted on the cover as the cover is lifted from the machine.
Take note of the polarity of the RED and BLACK connections to the circulation pump
motor.
Reach inside the bath and hold the barrel of the circulation pump motor firmly in
one hand while twisting and pulling the motor from the top. Tools are not required. The
motor, complete with the location boss assembly should extract from the pump barrel.
Unscrew the insulating adaptor from the metal location boss, then unscrew the motor from
the insulating adaptor.
Remove the insulated coupling from the motor shaft and fit it to the new motor making sure
it is in the same position on the motor shaft.. Tighten firmly. Re-fix the insulating adaptor
to the new motor and re-fix insulating adaptor to the metal boss.
Look down the barrel of the pump and see the cross pin at the top of the shaft. This cross
pin must engage in the slot of the coupling. Line up the slot as the motor assembly is re-
inserted into the barrel. ‘Feel” the end of the shaft enter the coupling, “feel” the cross pin
enter the slot, then push the motor assembly all the way into the barrel.
Check that the pump is resting squarely on the bottom of the bath.
Reconnect the wiring to the tabs of the new motor, making sure the polarity to the motor is
as originally connected. The motor must rotate anti-clockwise as viewed from the top or the
circulation will be very poor. NOTE: The direction of rotation can be felt by placing a finger
on the motor shaft protruding from the top end of the motor.
The cable can be connected to the control unit with the long cover removed for a test. Allow
the display to come on and press the START button. Water should automatically fill the
bath. With water in the bath higher than the low level switch, the circulation pump will turn
on and the water circulation should be seen and felt coming from the pump into the bath.
If all is OK, turn off the power and re-fit the rear cover to the machine. Turn on the power
and allow the bath to fill.
