Details concerning the Tempstar models wash motor assemblies:
The pumps for the Tempstar models covered in this manual are close coupled centrifugal pumps. The pump casings are made from
iron and may be prone to oxidation if still water is left in the casing for an extended amount of time. It is recommended that if the unit
is not to be used for such a period, such as for renovation of the installation site, that the casing be drained completely. The impeller
is made from stainless steel to resist corrosion and is threaded onto the pump shaft. Water is prevented from travelling down the shaft
into the motor by use of a mechanical-type shaft seal. As with all mechanical seals, care must be taken not to damage the sealing sur-
faces. Mechanical seals should only be replaced by trained service personnel.
The motors chosen to be used on the Tempstar models covered in this manual all have open drip proof construction and are rated with
jet pump service factors for continuous duty operation. The motors are all 3/4 HP, 60 Hz, and operate at 3450 RPM.
All motors installed on Tempstar dishmachines have overload protection. Single phase motors will have built-in overload protection and
will be capacitor start units. Three phase motors will have external overload protection located in the control box. The overload pro-
tection is to protect the motor from over current damage due to electrical or mechanical failure.
It is of vital importance that it be stressed that efficient operation of the wash motor assembly is essential in proper ware washing. The
pump must never be ran without water in the casing, for this causes a build-up of heat which can damage the casing gasket and cause
the pump to leak. A leaking pump will cause the water level to lower in the machine and will have two detrimental effects: (1) air will be
pumped through the wash arms, reducing the dishmachine’s ability to wash, and (2) the liquid level control circuit will energize more
often, using more water to maintain wash tank level; this will increase the overall cost of operating the unit.
WASH MOTORS
25
The Tempstar models covered in this manual come supplied with various wash motor assemblies (a wash motor assembly includes
the wash motor and the pump end), depending on the characteristics of the machine. To ensure that you order the correct wash
motor assembly for the model you are servicing, please refer to the following table:
Model
Volts Hz Phase Wash Motor Assembly
Tempstar 208 60 1 6105-121-35-18
Tempstar 230 60 1 6105-121-35-18
Tempstar 208 60 3 6105-121-35-18
Tempstar 230 60 3 6105-121-35-18
Tempstar 460 60 3 6105-121-64-21
Tempstar SDS 208 60 1 6105-121-35-18
Tempstar SDS 230 60 1 6105-121-35-18
Tempstar SDS 208 60 3 6105-121-35-18
Tempstar SDS 230 60 3 6105-121-35-18
Tempstar SDS 460 60 3 6105-121-64-21
Tempstar NB 208 60 1 6105-121-35-18
Tempstar NB 230 60 1 6105-121-35-18
Tempstar NB 208 60 3 6105-121-35-18
Tempstar NB 230 60 3 6105-121-35-18
Tempstar NB 460 60 3 6105-121-64-21
Important note: When servicing a wash motor, it
is important to refer to the wiring schematic found
on the motor, to ensure that the motor is wired cor-
rectly. Different manufacturers of motors may not
use the same wire color codes and therefore, your
new motor, which may have been built by someone
different than who built your original motor, may not
connect using the same wires. Always refer to the
wiring diagrams on the motor you are installing. If
the motor you are installing has had the schematic
removed, contact Jackson MSC immediately for
technical support.
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