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AHT Cooling Systems GmbH
climate class examples:
Climate class
according to ISO 23953-2
Ambient
temperature
[°C]
Relative air
humidity [%]
0
20
50
2
22
65
3
25
60
Classifi cation according
to NSF 7
ambient temperature
Type I display refrigerator
≤ 75 °F (24 °C)
Type II display refrigerator
≤ 80 °F (27 °C)
Further information see
➙
Chapter 1.3
3. Design and function
All individual appliances are delivered ready for operation
and have their own control unit. The appliances come pre-
programmed from the factory.
Each appliance contains hermetically sealed refrigerant
circuits whose components are permanently connected to
each other and technically leak proof. An appliance group
consists of several individual appliances and is constructed
in a modular design. A partition wall may be required be-
tween the individual appliances.
The design of the individual appliance models can vary.
Appliance models with brine circuits (water):
The exhaust heat produced by the appliance is emitted
through a brine circuit.
NOTICE
Material and property damage
due to the use of non-
approved components.
▶ Connecting to a brine circuit for the purposes of
recooling is only approved on AHT appliances.
Shelves / display racks can be extended, reduced or repo-
sitioned.
All appliances are equipped with air intake grilles.
Fig. 1: Position of air intake grille (example photo)
3.1 Automatic defrosting
All appliances are equipped with automatic defrosting. Dur-
ing automatic defrosting, the LED status indicator lights up
yellow (see
➙
Chapter 4.2).
The frequency, duration and timing of automatic defrosting
are pre-programmed. The maximum defrosting duration is
60 minutes. The accumulated condensation water is fed to
a drain through a heated defrost water channel (drain see
➙
Chapter 10.1.1) and drained through a defrost water
outlet (see
➙
Chapter 7).
cAutiON
leaking defrost water. risk of slipping.
▶ Check under and in front of the appliance for
the formation of puddles.
▶ Remove leaking defrost water immediately.
During the defrosting operation, a temperature increase can
occur on the temperature indicator and condensation can
form on the inner surfaces of the glass. This condensation
will disappear after automatic defrosting has ended.
3.2 Function of appliance lighting
The appliance lighting can be linked to another lighting
system, for example the store lighting system (control via
external day/night signal). Technical specifi cations see
➙
Chapter 2.2
Function of daytime operation:
If daytime operation is activated, the appliance lighting is
also switched on.
Function of night operation:
If daytime operation is deactivated, the appliance lighting is
also switched off .
4. Operating and indicator elements
4.1 Temperature indicator
The temperature of the appliances is set at the factory so
that the optimum product temperature is maintained.
Display of the appliance’s internal temperature (air
temperature):
Display indicator inside on the upper left of the appliance
ceiling (see
➙
Fig. 2).
indicator:
Solar- or battery-operated
checking the internal temperature:
responsibility:
Operating personnel
Frequency:
several times a day
Fig. 2: Internal temperature indicator (example photo)
4.2
LED status indicator
