Hobart FT900 User Manual

O

P

FT900 SERIES DISHWASHERS

R-L OPERATION L-R OPERATION

LOAD

5' ML-110672 ML-110673
6' ML-110870 ML-110871
7' ML-110674 ML-110675
8' ML-110876 ML-110877
9' ML-110881 ML-110882

E

R

A

T

I

O

N

CENTER

8' FT900 ML-110676 ML-110677
11' FT900W ML-110883 ML-110884
4' FT900S ML-110705 ML-110706 R-L OPERATION L-R OPERATION

UNLOAD WITHOUT BLOWER-DRYER UNLOAD WITH BLOWER-DRYER

5' ML-110680 ML-110681
6' ML-110805 ML-110806
7' ML-110682 ML-110683
8' ML-110807 ML-110808
9' ML-110684 ML-110685 ML-110688 ML-110689
9'split ML-110809 ML-110810 ML-110811 ML-110812
10' ML-110813 ML-110814 ML-110815 ML-110816
10'split ML-110817 ML-110818 ML-110819 ML-110820
11' ML-110686 ML-110687 ML-110690 ML-110691
11'split ML-110821 ML-110822 ML-110823 ML-110824
12' ML-110825 ML-110826 ML-110827 ML-110828
12'split ML-110829 ML-110830 ML-110831 ML-110832
13' ML-110833 ML-110834 ML-110835 ML-110836
13'split ML-110837 ML-110838 ML-110839 ML-110840
14'split ML-110841 ML-110842 ML-110843 ML-110844
15'split ML-110845 ML-110846 ML-110847 ML-110848
16'split ML-110849 ML-110850 ML-110851 ML-110852
17'split ML-110853 ML-110854 ML-110855 ML-110856

701 S. RIDGE AVENUE

TROY, OHIO 45374-0001

937 332-3000

www.hobartcorp.com

FORM 33906 Rev. C (Mar. 2000)

Operation and Care of

FT900 SERIES DISHWASHERS

SAVE THESE INSTRUCTIONS

OPERATION

MACHINE PREPARATION — Check before beginning operation.

Raise the machine doors and make sure all components are in their proper operating positions.

Pump Intake Screens must be put on
holders at each pump intake (Fig. 1).

Fig. 1

End Caps must be correctly installed at
ends of all Wash Arms (Fig. 4).

Strainer Pans must be in place on top of
each tank (Fig. 2).

Fig. 2

Wash Arms must be properly installed
and latched in place (Fig. 5).

Strainer Baskets must be in place in
Strainer Pans (Fig. 3).

Fig. 3

The Flush Arm at load end must be
properly installed (Fig. 6).

Fig. 4

The Final Rinse Arm must be properly
installed (Fig. 7).

Fig. 7

© HOBART CORPORATION, 1998

Fig. 5

Final Rinse Actuators must move freely,
if so equipped (Fig. 8).

Fig. 8

– 2 –

Fig. 6

Curtains must be in their proper
places (Fig. 30, pages 9-11) . . .

A Short Curtain on the unload
side of each upper Prewash,
Wash, and Power Rinse Arm,

Long Curtains on both sides
of every section divider,

Two Long Curtains at the Load
End.

FILL

Assure proper water hardness. Recommended range is 4 – 6 grains per
gallon.

All water (and steam, if equipped) supply valves must be opened and the
electric supply turned on before the machine will function.

POWER

ON / OFF

AMBER

Light

START

GREEN

INITIAL

FILL

GREEN

Light Only

Close the drains and doors. Push the POWER ON / OFF switch (Fig. 9-a).
The DOORS CLOSED indicator light (blue) will be lit when all doors are
closed. All tanks will fill (for

10 – 15

minutes).

DOORS

CLOSED

BLUE

Light Only

STOP

RED

When all tanks are filled, the water will automatically shut off and the
green INITIAL FILL light will be lit. The proper water level will be
maintained throughout operation by the full-time auto-fill feature.

Fig. 9-a

On machines equipped with Electric Blower-Dryer option, some were equipped with a lighted BLOWER
ON / OFF switch which controls power to the Blower-Dryer (Fig. 9-b) and indicates when the Blower­Dryer is running. NOTE: A RED light (Fig. 9-b) is provided on Blower-Dryers equipped with electric
heat to alert the operator to

SERVICED BY A QUALIFIED TECHNICIAN if the blower over-temperature thermostat has been activated.

TURN MACHINE OFF, DISCONNECT ELECTRIC POWER, AND HAVE UNIT

On machines equipped with Steam Blower-Dryer option, some were equipped with a lighted BLOWER
ON switch which controls power to the Blower-Dryer (Fig. 9-c) and indicates when the Blower-Dryer
is running. When the combination Blower-Dryer switch and indicator light is not provided, the steam
Blower-Dryer is on when the pumps are on.

Push the green START switch at either end of the machine or at the control box — to start the conveyor
and pumps. Push the red STOP switch at either end of the machine or at the control box to stop the
conveyor and pumps. Tanks will continue to heat if the POWER ON / OFF switch remains ON. If a
separate switch is provided for a Blower-Dryer, push once for On and a second time for OFF. If no
separate Blower-Dryer switch is present, the Blower-Dryer should be ON when the pumps are on.

Electric Blower-Dryer —
with ON / OFF Switch
and Red Indicator Light

BLOWER
ON / OFF

WHITE

Light

! WARNING

If red indicator lights:

• Disconnect from power

RED

Light Only

supply

• Have unit serviced by

qualified technician.

Electric Blower-Dryer —
without ON / OFF Switch
with Red Indicator Light

RED

Light Only

Fig. 9-b

! WARNING

If red indicator lights:

• Disconnect from power

supply

• Have unit serviced by

qualified technician.

Steam Blower-Dryer —
with ON / OFF Switch

BLOWER

ON

WHITE

Light

Steam Blower-Dryer —
powered by the machine
ON / OFF switch

Fig. 9-c

DISHWASHING

To start the conveyor, pumps, and blower-dryer (if not switched separately), press the green START
switch at either end of the machine or at the control box. The conveyor will operate only when all
machine doors are closed and the tanks are filled to the proper level. When equipped with Blower­Dryer, the Blower-Dryer will operate with the conveyor and pumps. Press the red STOP switch at either
end of the machine or at the control box to stop the conveyor and pumps. The Auto-Timer will
automatically stop the machine if no ware is washed for a preset length of time. The Auto-Timer shut­off setting can be changed by your Hobart service technician (range is 2 – 8 minutes).

– 3 –

Empty Strainer Baskets During Operation as Necessary

The Strainer Baskets must be emptied periodically during operation to prevent them from becoming
clogged, which would adversely affect dishwasher operation. STOP the machine and open the side
access doors; Strainer Baskets are immediately inside at the front of the tanks.

Loading

Pre-scrap dishes thoroughly to remove large food particles and debris. Never use steel wool on ware
to be loaded into the dishwashing machine.

All plates, saucers, trays, etc. should be loaded on the conveyor in an inclined position. Bowls should
be loaded upside down. Cups, glasses, and silverware should be washed in racks, although cups and
glasses may be loaded directly on the conveyor.

DO NOT attempt to wash large items (pots, pans, trays, etc.) without first checking to make sure they
will fit through the machine opening. Such items must not be washed in this dishwasher unless they
will easily pass through it.

Do not allow foreign objects to enter the unit, especially metallic contaminants.

Unloading

Remove dishes from the conveyor and stack similar
items together.

If an item is left on the conveyor, it will strike the
conveyor trip assembly (Fig. 10) and stop the
conveyor. Pumps run for 1 minute — then shut off.

First, unload all other ware on the unload conveyor.
Remove dish in trip arm last. Machine automatically
restarts.

Fig. 10

Recommended Minimum Temperatures

Thermometers monitor water temperatures and should be checked occasionally to assure that proper
temperatures are being maintained.

Recommended minimum temperatures are posted on the machine control box (Fig. 11).

0

8

1

1

9

0

6

1

65

0

4

60

1

50

1

2

0

1

0

0

80

85

75

70

40

0

2

90

0

0

95

0

100

1

2

105

˚C

0

2

˚F

2

0

8

1

1

9

0

6

1

65

0

4

60

1

50

1

2

0

1

0

0

80

85

75

70

40

0

2

90

0

0

95

0

100

1

2

105

˚C

0

2

˚F

2

0

8

1

1

9

0

6

1

70

65

0

4

60

1

50

1

2

0

1

0

0

0

80

85

75

40

2

90

0

0

95

0

100

1

2

105

˚C

0

2

˚F

2

0

8

1

1

9

0

6

1

70

65

0

4

60

1

50

1

2

0

1

0

0

80

85

75

40

0

2

90

0

0

95

0

100

1

2

105

˚C

0

2

˚F

2

FINAL RINSE RINSE WASH PREWASH

180°F (82°C) MIN. 160°F (71°C) MIN. 150°F (66°C) MIN.

Fig. 11

– 4 –

CLEANING

The dishwasher MUST be thoroughly cleaned at the end of each working shift.
Drain the machine by lowering the drain levers to a horizontal position. Drain levers are located near

the floor at the front of each tank. Draining the tanks requires approximately 5 – 10 minutes.
Push POWER switch OFF. DISCONNECT ELECTRICAL POWER BEFORE CLEANING. Open all

front access doors.
Remove the curtains. Clean the curtains. Using a good hose with spray nozzle, clean the load shelf

and unload shelf by spraying debris into the machine (Fig. 12). Thoroughly cleanse and flush the
dishwasher interior (Figs. 13 & 14).

Fig. 12 Fig. 13 Fig. 14

Remove the wash arms by first releasing the latches (Fig. 15). Slide upper arms forward, swinging front
of arm down (Fig. 16). Remove the end caps (Fig. 17). Clean wash arms in a sink.

Fig. 15 Fig. 16 Fig. 17

Remove the flush arm at the load end of the machine (Fig. 18). Clean flush arm and nozzles in sink.
Remove the strainer baskets (Fig. 19) and strainer pans (Fig. 20). Empty strainers in trash receptacle
or food waste disposer.

TO DISLODGE DEBRIS. Scrub strainer pans and strainer baskets in a sink.

DO NOT STRIKE STRAINER PANS OR STRAINER BASKETS ON SOLID OBJECT

Fig. 18 Fig. 19 Fig. 20

– 5 –