Blakeslee DD-8 - Manual (Page 19)

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Pump Motor Overload Protection
Wash pump motor protection is provided by thermal
overload relay(s) located in the control box. In the event
the pump becomes jammed, the motor will draw a higher
current and trip the overload relay. Once any jam has been
cleared and the impeller turns freely, the overload must
be manually reset before the motor will operate.
Thermal Overload Relay
Thermal Overload Relay Location
CAUTION
Any open (blown) fuse must be replaced with the
same size and type fuse. Increasing the size or
rating of the replacement fuse will eliminate the
circuit protection and void the warranty. The control
panel uses a 1.6 amp – slow blow fuse. Blakeslee
recommends that spare fuses of the correct rating and
type be kept on hand. These fuses can be obtained
from the Blakeslee parts distributor or authorized
service agency.
Water Treatment
The quality of the water supplied to the dishwasher will
greatly affect the maintenance requirements, detergent
usage and end results.
Water quality is typically referred to as water hardness.
The higher the mineral content, the harder the water.
Some water supplies are only slightly hard, while others
are considered very hard. Water hardness is measured in
grains per gallon (gpg).
Water Quality Categories
1–3 gpg – slightly hard
3–7 gpg – moderately hard
7–10 gpg – hard
10+ gpg – very hard
Left untreated, hard water will leave behind deposits,
called scale, that can build up on machine surfaces. Hard
water requires the use of more detergent to achieve the
same cleaning results and may leave visible spots on
glasses and flatware.
Water that is only slightly hard may not need treatment
to achieve good results; however, if moderately hard to
very hard water is being supplied to the unit, a water
treatment system is recommended.
There are various water treatment systems available. Speak
to a water treatment specialist or chemical supplier for
water treatment options.
Water Treatment System Maintenance
Depending on the type of water treatment system, regular
maintenance may be required.
Water hardness may dictate the type and frequency of
maintenance. Make sure to follow the manufacturer’s or
water treatment specialist’s recommendations.
Equipment failures caused by water quality issues (scale
or lime buildup, for example) are not covered under the
manufacturer’s warranty.