Blakeslee DD-8 - Manual (Page 5)

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GENERAL DESCRIPTION
Model D-8
The Model D-8 door-type commercial dishwasher has a
three-sided door or hood that is spring counterbalanced
and opens as one unit to provide access to the machine. The
machine can be easily modified from a straight- through to
a corner unit by simply moving one track rail. If the unit is
to be used in a corner, the right side should be positioned
toward the wall to allow access to the controls.
Model DD-8
The Model DD-8 door-type commercial dishwasher has a
three-sided door or hood that is spring counterbalanced
and opens as one unit to provide access to the machine.
The unit has two wash tanks and can wash two dish racks
at a time. The Model DD-8 can be specified as a straight-
through or corner unit when ordering. The side to be
used in the corner must be designated so the controls
are accessible.
Door Safety Switch
All models are equipped with a door safety switch. The
machine will not operate when the door is open. If the
door is accidently opened during a cycle, the machine will
stop operating. Some models may be equipped with an
optional door safety lock which prevents the door from
opening during a cycle.
On manual start units, the door must be closed and the
operator must press the start button to initiate a cycle.
On machines equipped with the optional automatic
start feature, the operator need only close the door to
start a cycle.
Pump Motor
The unit is equipped with a 1½ HP motor. Model D-8 has
one motor; Model DD-8 has two motors.
Control Circuit
All units are supplied with a 110 VAC control circuit.
Vacuum Breaker
The fill l ine has a vacuum breaker installed in it to prevent
any backflo w of wate r into the fresh water supply line. If
a negative pressure deve l ops in the supply line, the loss
of pressure pe r mits a chec k valve inside the breaker to
drop, sealing the or i fice. A t th e same time, a ven t opens
admit ti ng air t o t h e system t o brea k th e v ac u u m.
Heaters
Wash t ank w ater is heated by e l ectricity, steam coil , steam
injec ti on or gas. E l ect ri ca ll y h eated machines a r e available
in 208, 2 4 0, 440 , or 480 VAC on l y .
Automatic Wash Tank Fill
All machines are supplied with automatic wash tank fill .
Final Rinse Boosters (Optional)
Machines can be equipped with an optiona l built-in
electric booster, remote mounted booster or remote
mounted steam booster . These boosters are designed
to raise the rinse water temperature from 140 °F to
180F°-185°F.
Heat and Voltage Field Changeover
When changing either to or from single- to three-phase
electrical power, the wash pump motor must be changed.
The motor overload relays must also be changed. See
parts description in the separate Illustrated Parts List and
wiring diagram.
When changing from 115 volts to 208, 230, 440 or 480 VACs,
single- or three-phase, a transformer must be added. The
motor overload relays must also be changed.