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1.
GENERAL DESCRIPTION
THS "LENNOX Telecom Split" units composed by an evaporating indoor unit THI for ceiling or wall
installation and a motor-condensing outdoor unit THC, mainly for electronic equipped shelters, process
centres, telecomunications sites from 4.5 to 14.5 kW of nominalcooling capacity.
The system provides air filtration, indoor ventilation, cooling, heating, freecooling with outdoor fresh air to
assure the useful climate in the site.
Structure
All THS units have a galvanised sheet steel supporting base and enclosing panels are painted with epoxy
polyester powder coating cured at 180°C, or, on request, painted galvanised sheet steel (RALxxxx).
Field of Application:
Power supply
Min
Temperature
Outdoor
Max.
Min.
Temp./humidity
conditions
Max.
Min.
Storage
conditions
Max.
THS units are to be used within the operating limits stated in this manual; failure to comply with said limits
will invalidate the warranties provided in the contract of sale.
Cooling circuit
The entire cooling circuit is built in the LENNOX factory using only components of the finest quality
brands and processes conforming to the specifications of Directive 97/23 for brazing and testing.
Compressors: only scroll-type compressors of leading international manufacturers are used in
the THS units. Today scroll compressors represent the best solution in terms of reliability,
efficiency and MTBF.
Cooling components:
Electric control board: The electric control board is constructed and wired in accordance with
Directives 73/23/EEC and 89/336/EEC and related standards. All the remote controls use 24
V signals powered by an insulating transformer. NOTE: the mechanical safety devices such
as the high pressure switch are of the kind that trigger directly; their efficiency will not be
affected by any faults occurring in the microprocessor control circuit, in compliance with 97/23
PED.
Control microprocessor: the microprocessor built into the unit allows the different operating
parameters to be controlled from a set of pushbuttons situated on the electric control board;
2
THS025
THS035
THS045
230Vac ± 10%/1Ph/50Hz
24± 16% Vdc emergency cooling
48± 16% Vdc emergency cooling
48°C
Molecular mesh activated-alumina filter dryer
o
Flow indicator with humidity indicator. Indications are provided directly on the sight
o
glass.
Thermostatic valve with external equalization and integrated MOP function.
o
High and low pressure switches
o
Schrader valves for checks and/or maintenance
o
Switching on/off of compressor to maintain the temperature set point T inside the
o
shelter
Alarm management
o
High / low pressure
MODEL
THS056
THS073
THS090
-20°C
46,5°C
45°C
47°C
19 °C - 30 % r.h.
35 °C - 50 % r.h.
+ 10° C / 90 % r.h.
+ 55°C / 90 % r.h.
THS105
THS120
400Vac ± 10%/3Ph+N/50Hz
24± 16% Vdc emergency cooling
48± 16% Vdc emergency cooling
45°C
44°C
IOM / @DNOVA_THS-0508
THS145
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