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4. Technical functions
Air-air heat exchangers are intended as complementary accessories to large industrial equipment which include
a motor-operated fan or blower together with a heat exchanger module. These may also include an electric
heater. The fan or blower is intended to recirculate air and allow heat exchange. The heat exchanger is
designed for air heat transfer only.
Cooling function may be controlled by an on-board or remote controller or thermostat. Heating function, when
installed is provided by an electrical heating element. The unit seals the cabinet which ensures that the clean air
inside does not come into contact with the ambient air which may well be dirty or polluted. The unit is fit for
purpose within the rated/declared ambient conditions (e.g. dusty and oily air or high air temperatures between
-5°C and 55°C), also indicating the rated allowable ingress and environment.
Heat exchangers are used where the heat generated by energy losses in control cabinets must be conducted
away to protect temperature-sensitive components. The characteristic graph shown in the section “Performance
graph” applies to external (ambient) air as the coolant.
In air-to-air heat exchangers, the internal temperature of the control cabinet cannot be cooler than the ambient
temperature. There are natural limits to the cooling performance, dependent on the air supply temperature and
the requirement for a temperature difference of at least 5K. Unlike systems in which the heat generated is
allowed to escape by air convection through ventilation slots, with the heat exchanger, the clean air inside the
control cabinet is prevented from mixing with the air outside, which may well be unclean.
5. Technical data
Order Number
3BHB022684R0101
Heat exchanger performance
165 W/K
Temperature range
-5°C - +65°C
Air volume flow (system / unimpeded)
Ambient air circuit 1400 m³/h
Cabinet air circuit 1200 m³/h
Mounting
Roof mounted
Housing Material
Mild steel, powder coated
Dimension H x W x D
1,025 (975) x 750 (700) x 320 (320) mm (Housing)
Weight
65 kg
Voltage / Frequency
230 V ~ 50/60 Hz
Rated current
2.9 A @ 50 Hz
4 A @ 60 Hz
Starting current
5.5 A @ 50 Hz
7.5 A @ 60 Hz
Max. current
2.9 / 4 A
Max. power
670 / 900 W
Fuse
6 A (T)
Connection
8 - pole terminal block
Ingress protection
IP 54
Approvals
CE, cURus File Number: SA9672