Hobart AMXXT Series Guide

REV. 8.xx – 04.07.2005
INSTALLATION OPERATION
Glass and Dishwashers
AMXXT / AUXXT Series

2
Important Notes
●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
Never hose down the machine.
The "Attention" symbol is shown beside instructions that are essential
for the safe operation of the machine. Please read these passages
thoroughly.
●Liability
Installations and repairs which are carried out by non 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.
Machine noise level is: AMXXT 65 dB (A) / AUXXT 70 dB (A)

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Installation and Operation Instructions
for Models of AMXXT / AUXXT Series
Content Page
1Installation ............................................................................................. 4
2Connections .......................................................................................... 4
3Connecting of detergent pump.............................................................. 5
4Controls................................................................................................. 8
5First run ................................................................................................. 9
6Settings ............................................................................................... 10
7Operation ............................................................................................ 11
8Preview of temperatures ..................................................................... 13
9Switch-off and cleaning the machine .................................................. 14
10 Refilling the softener with salt ............................................................. 15
11 Frost prevention .................................................................................. 15
12 Maintenance ....................................................................................... 15
13 Faults .................................................................................................. 16
14 Troubleshooting guide ......................................................................... 16

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2Connections
2.1 Electrical connection
Must be carried out by an authorized technician
according to the local and national codes.
–The electrical supply shall comply with the name-plate data.
With voltage 400/50/3/N reduced booster loading can be
realised according to wiring diagram.
–Line fuses and cable cross section shall comply with the
requirements.
–A cut-off device shall be provided to connect the supply cord
(isolating switch or accessible plug device).
According to EN 60 335 the appliance must be connected to an
equipotential conductor. The connecting screw ( ) is located
beside the cable inlet.
1Installation
1.1 Location
–Rear wall clearance not required.
For corner installation lateral clearance of 107 mm is required.
For free-standing installation the optional rear panel has
to be installed.
–Level machine by turning the feet.
–Distribute machine weight equally onto all feet.
1.2 Converting to corner operation
Depending on direction of operation, one of the rack guides may
need to be adjusted to suit the direction of operation (see arrow).
–Unscrew the guide rail in front.
–Remount guide rail at right angle according to the direction of
operation.

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2.2 Water connection
Must be carried out by an authorized technician
according to the national and local codes.
The machine must be operated with water of drinking quality.
For water with an extremely high mineral content, water
treatment is recommended.
Machines without softener
–Connect to soft and if possible warm water
(up to 4° Clark = 0.5 mmol/l, max. 60°C).
–Line flow pressure 0.5 – 10 bar.
Important: the line flow pressure must not be less than 0.5 bar.
–If the line flow pressure is above 10 bars: provide pressure
reducer at source.
Machines with softener
–Connect to warm water (max. 60°C) if possible.
–Line flow pressure 0.5 – 10 bar.
Important: the line flow pressure must not be less than 0.5 bar.
–If the line flow pressure is above 10 bar: provide pressure
reducer at source.
–Connect the union nut "A" (3/4") of the water supply hose
with the site shut off valve.
–Do not kink or cut the supply hose.
2.3 Drain connection
–Connection between machine and site drain must not exceed
max. height of 800 mm.
–Do not kink the drain hose.
3Connecting of detergent pump
If no detergent pump was ordered, please connect the detergent
dispenser as described below.
Must be carried out by an authorized technician
according to the local and national codes.
–Tank must be drained.
–Switch off main switch or unplug.
–Liquid detergent dispenser: remove front panel.
Powder or solid detergent dispenser: remove front panel
and the left hand or right hand side panel (according to
requirement on site).
A
max. 800 mm
30°-45°

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–Lift up control box and turn it to front.
TO CONNECT A LIQUID DETERGENT DISPENSER:
–Remove blanking plug (A) at tank (either at the right or left tank).
–Install detergent inlet fitting + gasket (B).
–Connect a hose (PVC / 6mm outside Ø x 4mm inside Ø) between
outlet of the detergent pump and the detergent inlet (B) of the
wash tank. Tighten with hose clamp.
–Install dosage pump or fit external dispenser.
–Connect the plug (C) of the wire harness with the dosage pump
(max. 100 VA).
A
B
B
C

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TO CONNECT A POWDER OR SOLID DETERGENT
DISPENSER:
–Break out perforated disk at the tank panel (either at the right
or left side).
–Drill a hole through the inner tank wall appropriate to the
required connection diameter.
–Screw up tightly the dosing connection with tank wall.
–Connect the plug (C) of the wire harness with the dosage pump
(max. 100 VA).
–Close control box and put panel(s) back into place.
Switch on main switch at site or put the plug in.
Dispenser adjustment see chapter 6.1.
CONDUCTIVITY PROBE:
–Conductivity probe should be installed at the flat part of tank
bottom (same tank where dosage is connected to) (see fig.).
–The hole size should be appropriate to the conductivity probe.
C

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3 1 7 4 2 5
8 6
4Controls
➀Machine ON / OFF By pushing this button the machine will be switched on.
(illuminates during operation) In case of emergency (e.g. faults), it is possible to switch off
the machine immediately without drain cycle, by pushing this
button again.
After switch off, the machine is not voltage free!
➁Start button This button illuminates to indicate the mode of the machine:
RED = machine fills and starts heating
GREEN = machine is ready for operation
BLUE = selected program is running
AUXXT models only: High pressure cleaning
Never use for cleaning glasses and light dishes
(breakage) !
High pressure mode for a running cycle will be activated by
short pushing the blue illuminated Start button (not possible
within the first 5 seconds after cycle start).
By pushing and holding (3 sec.) the Start button, high
pressure mode will be activated permanently.
➂Drain button By pushing and holding (2 sec.) this button, the drain and
(illuminates during operation) self cleaning cycle starts. At the end of the cycle, the
machine switches off automatically.
After switch off, the machine is not voltage free!
➃Program button By pushing this button, it is possible to select between
different pre-set programs, according to the model and
equipment. The program no. (e.g. P02) appears at the rinse
temperature indicator ➅.
➄Temperature indicator Wash (°C) Indicates only on demand (see chapter 8).
➅Temperature indicator Rinse (°C) Indicates only on demand (see chapter 8).
➆Salt required Indicating the need for regeneration salt to be added.
(Only with built-in softener.)
➇Service indicator Indicating, that the machine has a fault.

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5First run
5.1 Rinse agent
–Put the suction hose (blue) into the rinse agent storage
container.
5.2 Detergent (only on option)
Do not use any acid detergent products with the built-in
detergent pump! (The ph-value has to be higher than 7.)
–Put the suction hose (white) into the detergent storage container.
The sucking high of dosing pumps is max. 1.5 meters.
Do not confuse the containers !
Use only commercial detergent and rinse agent.
Please pay attention to the manufacturers safety rules
and instructions!
5.3 Softener (only on option)
The machine will be delivered without salt. For the first run,
the softener has to be filled with salt and water.
–Open hood.
–Unscrew the softener lid and fill the softener with 2kg of
"Granular salt" (do not use salt tablets).
–Fill up the softener with drinking water.
Clean seal and rim of softener lid carefully, before closing
the lid.
–Close lid and tighten.
5.4 Filling of the rinse booster heater and pre-dosing
–Close hood.
– Open shut-off valve.
–Switch on main switch or put the plug in.
–Push the ON/OFF button ➀,the button illuminates. At the
temperature indicator Rinse ➅appears "boF" and flashes.
The rinse booster heater has to be filled as described in the
following text.
–Push the ON/OFF button ➀again, to switch off the machine.
–Open hood, push Program button ➃and Drain button ➂
simultaneously until at the temperature indicator Rinse ➅
appears again "boF".
–Push Start button ➁. At the temperature indicator Wash ➄
appears "- - 1". Wait until the indicator displays "- - 0".
–Close hood. The machine switches off and is now ready for
operation.

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6 Settings
Attention:
machine has to be switched off.
–Open hood, push Program button ➃and Drain button ➂
simultaneously until at the temperature indicator Rinse ➅
"boF" appears.
If no button is pressed during next 10 secs., the indicator
switches off and the new settings will be saved.
6.1 Adjustment of detergent dosage quantity
(delivery values are only valid with built-in HOBART dispenser)
–Push Program button ➃again.
The temperature indicator Rinse ➅displays:
"CH1" = adjustment of the detergent dosage quantity.
The temperature indicator Wash ➄displays e.g.:
"21" = pre-adjusted value of the detergent dosage time =
21 sec. ≈2,4 g/l.
–To adjust the detergent dosage time, push Start button ➁
repeatedly, until the desired value (0 - 50 sec. ≈0 - 6 g/l)
appears at the Wash indicator ➄.
(Adjustment should be done in accordance with chemical
suppliers recommendations.)
6.2 Adjustment of rinse agent dosage quantity
–Push Program button ➃again.
The temperature indicator Rinse ➅displays:
"CH2" = adjustment of the rinse agent dosage quantity.
The temperature indicator Wash ➄displays e.g.:
"19" = pre-adjusted value of the rinse agent dosage time =
19 sec. ≈0,3 g/l.
–To adjust the rinse agent dosage time, push Start button ➁
repeatedly, until the desired value (0 - 50 sec. ≈0 - 0,8 g/l)
appears at the Wash indicator ➄.
(Adjustment should be done in accordance with chemical
suppliers recommendations.)
6.3 Adjustment of water hardness (with optional softener only)
To adjust the softener to the local water hardness (obtain details
from local water authority):
–Push Program button ➃again.
The temperature indicator Rinse ➅displays:
"H02" = adjustment of the softener (if built in).
–Push Start button ➁repeatedly, until the required value
(H01 - H03) appears at the temperature indicator Rinse ➅.
H01 = up to 10° eh / H02 = 11 to 20° eh / H03 = 21 to 30° eh
water hardness (eh = Clark).