E_CN_Druckboiler - Bent Brandt WebShop

Warewasher
CNB Series
(with Standard-Control)
INSTALLATION OPERATION
VERSION 17.11.2004

2
Important Notes
Installation and Operation Instructions
for Warewasher CNB Series
Content Page
1 Assembly .............................................................................................. 3
2 Electrical connection ............................................................................. 5
3 Water connection .................................................................................. 6
4 Steam or high pressure hot water connection ...................................... 7
5 Exhaust connection............................................................................... 7
6 Dispensers ............................................................................................ 8
7 First run ................................................................................................. 9
8 Control Panel ...................................................................................... 11
9 Preparation ......................................................................................... 14
10 Operation ............................................................................................ 16
11 Cleaning the machine ......................................................................... 16
12 Position of curtains.............................................................................. 18
13 Frost prevention .................................................................................. 19
14 Maintenance ....................................................................................... 19
15 Trouble shooting guide ........................................................................ 20
Machine noise level is ≤ 70 dB (A)
● Use in Accordance with Regulations
This machine is exclusively to be used to wash ware such as plates,
cups, glasses, cutlery, trays etc.
Do not use for electrically heated cooking and heat conservation
appliances.
● Safety
If a starch attack system is built in, the detergent company has to take
care of all relevant safety rules and regulations.
Please avoid any contact with the concentrated detergent.
Never hose down the exterior of the machine.
The "Attention" symbol is shown beside instructions that are essential
for the safe operation of the machine. Please read these passages
very thoroughly.
● Liability
Installations and repairs which are not carried out by authorized
technicians or the use of other than original spare parts, and any
technical alterations to the machine, may affect the warranty set
out in the standard conditions of sale.
● Important:
This Instruction manual is written for machines with an operating direction
from left to right. For machines with an operating direction of right to left,
the same information applies but with opposite handling directions.

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1 Assembly
Should be carried out by authorized Service technicians.
1.1 Transport to installation location
– If possible in its packing and on skid.
– Push on rollers.
– Avoid damage to floor and doors.
1.2 Remove packing
– Cut steel bands.
– Remove carton.
– Remove wooden skid.
– Remove inside packing material and accessories.
1.3 Locating
– According to installation plan.
– Consider wall clearance (normally 39 mm).
– Consider length of tabling, conveyors, etc.
1.4 Adjusting machine height
– Level machine to compensate floor unevenness.
– Distribute machine weight equally onto all feet.
1.5 Assembly of modules
If the machine is delivered in separate modules.
– Put largest module in place and level.
3

4
D
A
C
E
B
1.5.1 Sealing Tape
No. 168 834 must be stuck on one of the connecting surfaces.
– If old tape (from factory testing) is still left, this must be removed
previously.
– The sealing tape must overlap at the corners.
1.5.2 Add next module
– Level height (see also 1.4).
– Connect by using screws M6 x 12 hex. head, washers,
lockwashers and nuts (supplied).
– Cut protruding sealing tape with knife.
– Connect drain pipes.
1.5.3 Tank connections
(Connect all washtanks with the overflow pipes.)
– Set gasket (A) on the overflow pipe (B).
– Put overflow pipe (B) from the inside of the tank through the
prepunched hole and tighten it with the nut (C).
– Push the hose (D) over the pipe (B) and fix them with a hose
clamp (E). Connect them with the overflow pipe of the next tank.
1.5.4 Transport feet (if exist)
Must be removed and returned to HOBART.
1.6 Electrical cables
Must be unrolled and drawn through the cable channel.
– Connect wires to the terminals of the electrical components.
– Follow the wiring diagram and the labels on wires and
terminals.

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1.7 Attach dish rack tables and accessories
– See separate instructions.
– Seal screw holes.
– Allow a slight inclination to the machine (if needed, adjust level
by turning the feet).
– Pay attention, that the table-top corresponds with the table
connection of the machine.
(it means, the catches of the rack transportation must overtop
the table level more than 12 mm)
– Table end switch:
Wiring to control box must be protected.
– Tables on rollers including end switch:
Close the connector of the cable and lock it.
2 Electrical connection
Must be carried out by a qualified technician according
to the national and local codes.
2.1 Check
– Open the control box and take out wiring diagram from the
inside of the door.
– The electrical supply shall comply with the name-plate data and
the wiring diagram.
– Line fuses and cable cross section shall comply with the
requirements.
– Supply disconnecting device (main switch with emergency stop
function) adjacent to the machine (if not built in).
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2.2 Connection
– Draw cable (H07-RN-F) through cable gland at the bottom of
the control box rear panel.
– Connect wires to main terminals or to main switch (if built in).
– Tighten all terminal screws in the control box (may be loosened
during transport).
– Tighten all cable glands.
According to EN 60 335 the appliance must be connected to an
equipotential conductor. The connecting screw ( ) is located at
the rear of control box beside the cable inlet.
3 Water connection
Must be carried out by a qualified technician according
to the national and local codes.
The machine must be operated with water of drinking quality.
For water with a high mineral content, water treatment is
strongly recommended.
3.1 General
– Connect water supply and drain pipes according to installation
plan.
– Line strainer and class A air gap are fitted to the machine as
standard.
3.2 Freshwater supply for rinse (G 3/4")
– Should be soft (up to 8° Clark, resp. 1.1 mmol/l).
– Must be cold if condenser is fitted.
– Line flow pressure 1.5 - 6 bar at ~ 500 l/hr.
– Provide shut-off valve.
3.3 Fresh water supply for fill (G 3/4" – Option)
– Should be soft (up to 8° Clark, resp. 1.1 mmol/l) and
warm (50 - 60°C).
– Line flow pressure 1.5 - 6 bar.
– Provide shut-off valve.
3.4 Drain connection
To be connected to site drain:
– Common drain DN 50
– Drip water drains of tabling, sink and other elements.
– All drains must be connected to goose neck (individually or
single point).

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4 Steam or high pressure hot water
connection
Must be carried out by a qualified technician according
to the national and local codes.
NOTE FOR INSTALLATION
Make sure that pressure and temperature of the heating
medium do not exceed values indicated on the installation plan.
4.1 General
– Connect supply and return pipes according to installation plan.
– All connections are equipped with neccessary fittings and
valves as standard.
4.2 Connection
Following units must be connected to supply and return pipes:
– rinse booster heater
– tank heating
– dryer (if installed)
4.3 Insulation
– All pipes should be insulated.
– Insulating material should be water, heat and shock proofed.
5 Exhaust connection
– Connection must be carried out in conjunction with competent
ventilation engineer.
– Please pay attention to notes on the service drawing.
5.1 Exhaust into the kitchen
(Only possible in connection with PROVENT-Heat Pump System
and sufficient room ventilation.)
– Avoid condensate damage by mixing exhausts from vent outlet
of the machine, directly with room air (air distributor).
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8
A
10 cm
5.2 Exhaust pipework
– Leave a distance (approx. 10 cm) between machine exhaust
and site channel or connect special extension hood (option).
– Use additional ventilation fan, as the built-in ventilator has no
compression.
The volume of air to be evacuated from site has to be larger
than the volume of air from the machine (see installation plan).
– To prevent corrosion damage, provide exhaust channel in
stainless steel or synthetic material.
– In case of extremely low temperatures:
provide insulation and anti-freeze shutter.
6 Dispensers
of detergent and rinse agent
– Normally, dispensers and controls are delivered and installed
by the detergent and rinse agent suppliers.
– Install dispensers, controls and containers such that they are
easy to handle and do not disturb machine operation.
– Rinse agent connection (A) is provided above the rinse booster
heater (R 1/8" inside).
– Terminals (230V~) are provided in the control box
(see wiring diagram).
It is recommended that dispensers and their controls are
not fitted directly to the machine!
(Thermal insulation panels could be damaged.)
The injection of detergent should be carried out at the tank
side wall.
Use only commercial detergent and rinse agent (suitable
for professional and industrial operations).
Please pay attention to the chemical suppliers safety
instructions.

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7 First run
Must be carried out to adjust and check machine functions.
See also chapter 8 (Controls).
Must be carried out by an authorized
Service technician!
7.1 Preparation
– Switch off main switch.
– Make sure, that detergent and rinse agent containers are filled.
– Open water supply.
– Open control box and switch on all circuit breakers and
motor protection switches.
Exception: if electrical rinse booster heater is installed:
make sure that its sealed protection switch is switched off
(see wiring diagram).
– Close inspection doors.
– Switch on main switch.
7.2 Fill rinse booster heater and tank(s)
– Press the contactor for the pressure pump of fresh water
storage tank until water sprays out of the rinse jets.
– Check if all rinse jets sprays correctly.
If not: remove rinse arms and clean jets.
– Switch off main switch.
Electrically heated machine:
– Remove the red sticker from the protection switch of rinse
booster heater (A) and switch on protection switch (B).
Steam- / high pressure hot water heated machine:
– Open shut-off valves.
– Close control box.
– Switch on main switch and set ON / OFF-switch to "fill"
position.
– After reaching the correct water level, filling switches off automatically
and the tank heating(s) switch(es) on.
– When correct temperatures obtained (the green OK pilot light
illuminates), the machine is ready for operation.
7.3 Fresh water quantity
The fresh water quantity is adjusted at the factory and may not be
changed.
If a new adjustment is needed, please call the after-sales service.
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7.4 Check
– Direction of rotation of motors (see direction sign):
- Pumps
- Conveyor motor
- Exhaust fan
- Dryer fan (if dryer is fitted)
If motor runs against the indicated direction, interchange
2 of 3 phases at the terminal.
– Check and eliminate potential leakages on:
- Drain
- Heating pipework and water supply pipework
- Machine housing, bottom of tanks, exhaust system
7.5 Autotimer (Option)
Wash, rinse and dryer (if fitted) operate only if racks are passing
through the machine.
These functions switch off automatically if no further racks follows.
The delay times can be adjusted by authorized Service Technicians.
7.6 Temperature adjustment
Temperatures are pre-adjusted at the factory.
If a new adjustment is needed, please call the after-sales service.
7.7 Adjustment of detergent and rinse agent
Should be done by the detergent and rinse agent supplier.
7.8 Adjustment of Timer "fill"
The timer is pre-adjusted at the factory.
If a new adjustment is needed, please call the after-sales service.
7.9 Adjustment of exhaust system
Should be adjusted by a qualified Service technician.
(Required exhaust volume at site is 1600 m3 /h.)
If a new adjustment is needed, please call the after-sales service.

8 Control Panel
5 6 7 9
1 ON / OFF switch
(illuminates during drain cycle)
Switches the machine on or off.
Starts the fill cycle (exhaust and heating will
start automatically) or drain the tanks.
2 Conveyor ON button
Switches the conveyor of the machine on.
The wash cycle will start automatically.
3 Conveyor OFF button
Switches the conveyor and wash off.
1 3 2 4 8
4 Conveyor speed selection switch (option)
I = slow (according DIN 10 510)
II = fast (nominal speed)
5 OK pilot light (green)
Indicates that the machine is ready for use.
6 Temperature display – wash
Indicates the current temperature of the last
wash tank.
7 Temperature display – rinse
Indicates the current temperature of the final
rinse water.
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ON - OFF
8 Temperature display button
By pushing this button the display indicates
individual tank temperatures or dryer
temperature (see chapter 8.1).
9 Warning light (red)
Indicates that a motor protection switch has
cut out or one of the temperature probes is
defective.
The wash temperature display ➅ indicates the
N o of the defect probe, the rinse temperature
display ➆ indicates the failure.
(e.g.: S = short circuit, L = open circuit)
10 Main switch (option)
Must be on position I during operation and on
position 0 during repair and maintenance.
11 Emergency Stop button (option)
Switches the machine off.
Must be unlocked for operation.
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8.1 Temperature display
By pushing this button ➇, individual temperatures (such as
pre-wash, wash, rinse or dryer) can be displayed.
Press the temperature display button.
Wash ➅ and rinse ➆ temperature display changes into the
display mode. The wash temperature display ➅ indicates the
selected measuring point, the rinse temperature display ➆
indicates the current temperature.
Measuring point 1
Indicates the current prewash temperature
(if a pre-wash tank is fitted).
Measuring point 2
Indicates the current temperature at wash tank 1.
(Valid only for machines with more than one main wash tank.)
Measuring point 3
Indicates the current temperature at wash tank 2.
(Valid only for machines with three main wash tanks.)
Measuring point 4
Indicates the current temperature of the last wash tank prior
to the rinse.
Measuring point 5
Indicates the current final rinse temperature.
Measuring point 6
Indicates the current dryer temperature (if a dryer is fitted).
By pushing the temperature display button again, the display
changes back into the basic mode.
(Current wash and rinse temperature display.)

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8.2 Faults
If a failure arises during operation, it will be indicated by the
flashing of the red warning light.
– The flashing of warning light without other information at the
temperature displays (➅ and ➆), indicates a motor fault.
– The flashing of warning light and a further indication appears
at the temperature displays, it indicates a temperature probe
fault (short circuit or open circuit).
Example:
The warning light flashes and the left temperature display ➅
shows F 1, and the right display ➆ shows an S or L.
This means:
The temperature probe F 1 failed by a short circuit (S) or an open
circuit (L).
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9 Preparation
Place pump intake strainers in Put the flat strainers in place. Put the strainer basket in place.
position at the bottom of wash tank.
Put the rinse strainer in place. Set wash arms in place: Set rinse arms in place.
Upper: set wash arm in side guides, Upper: set rinse arm in back opening,
move to end position and drop-in move from below into guide and
over stop unit. click into place.
Lower: move wash arm in side Lower: move rinse arm in guides
guides to end position and click
into place.
to end position and click into place.
Put curtains in place Close inspection doors. Switch on main switch and turn
(see page 18). Ensure sufficient detergent and the machine ON / OFF switch to
rinse agent is available in the right "Fill" position
containers. Fill, exhaust and heating elements
Open shut-off valves. start automatically. Wait until the
green OK pilot light illuminates.
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0
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9.1 Racking
When loading plates
consider the machine direction.
Gastronorm pans and other large containers or boards should ideally
be washed in a separate Utensil Washer.
In a CN these items may cause problems such as splash-over leading
to low water levels in the tank/s and poor rinsing.
On the occasions when these items are to be washed, they should be
loaded sloping towards the direction of machine operation as shown
in the picture. This will reduce the problems described above.
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10 Operation (Remove coarse food soil before washing.)
To start the conveyor, push the Push the Conveyor OFF button to Check temperatures from time to
Conveyor ON button. stop the conveyor and also before time.
Put the washware in suitable racks changing the conveyor speed. Give washware enough time to
on conveyor. dry after washing.
11 Cleaning the machine
Push the Conveyor OFF button. Wait until the tanks are completely Take out an clean curtains.
Conveyor and wash stop. drained.
Turn the machine ON / OFF switch Turn the machine ON / OFF switch
to "Drain" position to empty the to "0" position and switch off main
machine. Exhaust and heating will switch!
stop automatically. Open the inspection doors.
Remove wash arms: Remove strainer baskets. Remove flat strainers.
Upper: press latch, lift wash arm
over stop unit and pull out.
Lower: lift wash arm to pull out.
Pull out end caps and clean wash
arms accurately.
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Remove pump intake strainers. Remove rinse strainer. Remove rinse arms:
Upper: pull spring towards front
and remove rinse arm.
Lower: lift rinse arm and pull out.
Control nozzle openings and clean
if necessary.
Hose down and clean the interior CLEAN ONCE A MONTH:
of the machine (particularly the Remove cover at the top of the Hose down condensers.
bottom of wash and prewash tank) condensers and slide away the
to avoid any waste remaining. exhaust housing.
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Hose down and brush the strainers – do not knock them to remove food soil! They could be damaged.
Never hose down the exterior of the machine.
To clean the machine do not use any chloric, acidic or abrasive products or metallic brushs.
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To empty the tanks switch on main Wait until the tanks are completely Switch off main switch and close
switch and turn the machine ON / emptied, then: shut-off valves.
OFF switch to "Drain" position. Set the machine ON / OFF switch Leave the inspection doors open
The drain pipes will be emptied to "0" position. for ventilation.
again.
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12 Position of curtains
18
The working direction as shown is left / right.
On working direction right / left the position of curtains is reversed .
429
325 360-7
655
630
1
781 067-1
Prewash modules
1
419
325 360-6
645
660
2
781 033-1
A AR
E
325 360-7
655
630
292 3
4
781 284-1
3 2 1 3 3 1 3 2 3
C
Wash modules Exit module
without dryer
1 3 2 3 1 3
2
L
OK
1
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2
ND
495
1
1 3
325 360-7
655
630
4
781 067-2
S
2 3

13 Frost prevention
(where required)
Must be carried out by an authorized
Service technician!
Drain machine (start drain cycle).
Set main switch to "0".
Switch off the protection switch of the electrical rinse booster
heater!
All tanks, water pipework and armatures must be totally drained.
– Close shut-off valves at site.
– Remove plug at the bottom of the break tank.
– Remove plug at the bottom of the rinse booster heater.
– Disconnect pipe after the non-return valve and let it drain.
– Drain site water pipework.
– Drain traps of drain system.
– Steam or hot water heated machines: drain all heating coils
and pipes.
– The condenser if fitted, must be blown out with compressed air.
– Reset for operation according to chapter 7.
14 Maintenance
For trouble free operation we recommend an inspection or
maintenance contract by qualified Service technicians.
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15 Trouble shooting guide
TYPE OF FAILURE POSSIBLE CAUSE REMEDY
tank fill too slow line strainer of fill clogged clean line strainer
solenoid valve defective call the after sales service
insufficient supply pressure provide correct services
tank not filled to correct level fill cycle too short call the after sales service
steam escapes from loading exhaust extraction too low call the after sales service
or exit section
wrong position of curtains check curtains
temperatures too low too much exhaust extraction call the after sales service
heaters defective check heaters, steam or high pressure hot
water supply systems and thermostats.
Call the after sales service.
washware soiled after strainers wrongly positioned check strainers
dishwashing
curtains not fitted or wrongly placed check curtains (see chapter 12)
wash jets clogged clean the wash arms
too low detergent concentration increase detergent dispensing
too much foam use non-foaming detergent only
excessive food debris entering machine check pre-scrapping procedure
temperatures too low check heating system
conveyor speed too high select lower speed
streaks and spots on strainers wrongly positioned check strainers
washware
wash water splashes into rinse section check curtains (see chapter 12)
rinse jets clogged clean rinse jets
inadequate rinse agent dispensing get the dispenser adjusted
too high mineral content of rinse water use of demineralized water recommended
washware do not dry incorrect temperature or humidity
of drying air
check heater and blower of drying unit
conveyor speed too high select lower speed
washware still greasy increase detergent concentration
drops on washware inadequate rinse agent concentration get concentration increased
dishes tilt over water pressure from below too high replace reducer between lower wash arm
and wash pipe
upper wash arms clogged remove wash arms and clean
items too light use cover on racks
machine out of order, main switch switched off, power supply switch on main switch, re-start machine
display switched off completely cut-off
emergency switch cut-off, power supply switch on emergency switch, re-start
completely cut-off machine
power failure re-start machine, when power available
again
As continued product improvement is a policy of HOBART, specifications are subject to change without notice.
Printed in Germany AG-21314-A-11-04-PC