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AHT Cooling Systems GmbH
The climate class is indicated on the power rating
plate (see → 2.2.1) or on the additional stickers on
the device.
Examples of climate classes:
Climate class
according to ISO
temperature
23953-2
0
2
3
Classification
NSF 7
according to
Type I display
refrigerator
Type II display
refrigerator
For additional information, see → Chapter 1.3
3 Layout and function
All individual devices are delivered ready for
operation and have their own control unit.
The devices are pre-programmed from the factory.
Each device contains hermetically closed refrigerant
circuits, the components of which are technically
connected to each other permanently.
A device group consists of several individual devices
and is built in a modular design. A partition wall may
be required between the individual devices.
The design of the individual device models can vary.
Device models with brine circuit (water):
The waste heat generated in the device is discharged
via a brine circuit.
NOTICE
• Material and property damage due to using non-
approved components.
► The connection to a brine circuit for cooling is
permitted only on devices of the manufacturer
AHT.
Device models with "Air" mode (additional
designation "AIR"): The waste heat generated in the
device is discharged to the ambient air via an air
condenser.
Device models with the additional designation
"HYBRID": The devices can be connected to a
brine circuit and also operated in "AIR" mode.
NOTICE
Material and property damage due to congestion
•
of the warm exhaust air (heat accumulation).
► The exhaust air must be able to escape freely at
the top of the device.
► Superstructures or suspended ceilings can be
attached directly to the device's top edge, only in
agreement, with the manufacturer.
► To blow out the warm air, at least 60 mm must
remain free between the ceiling and possibly
suspended marketing posters.
Shelves/display shelves can be expanded, reduced
or repositioned.
Ambient
Relative
humidity [%]
[°C]
20
50
22
65
25
60
ambient temperature
≤ 75 °F (24 °C)
≤ 80 °F (27 °C)
All devices are equipped with air intake grilles.
In the case of devices equipped with night blinds, the
correct position of the air intake grilles is a
prerequisite for the correct functioning of the device
(closing the night blind).
NOTICE
Material and property damage due to faulty
•
position of the air intake grilles.
► Daily inspection by operating staff of the correct
position of the air intake grille (see → Fig. 1).
True
Fig.1: Position of air intake grille (symbol display)
Device models "ROLL-IN":
For easy and fast loading of goods with
- exchangeable roller containers.
- exchangeable pallets (with ROLL-IN GD 280 L/H).
For an illustration of this, see → Chapter 9.1.1
3.1 Automatic defrosting
All devices have automatic defrosting.
During automatic defrosting, the display shows "-d-"
and the LED symbol "
status LED lights up yellow (see → Chapter 4.2).
The frequency, duration and time of the defrosting are
preset. The defrosting duration is 60 min. The
accumulated condensation water is collected in a
collection tray (bottom trough with drainage; see →
Chapter 10.1.1 Fig. 12) and discharged via a
condensation water connection (see → Chapter 7).
Leakage of defrosted water.
Slipping hazard.
► Check for puddle formation in
front of and below the device.
► Remove spilled defrosted water
immediately.
During the defrosting process, a slight increase in
the temperature can occur on the temperature
display.
41
False
" (see → Chapter 4.3). The
CAUTION
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