General Description; Structure; Field Of Application; Cooling Circuit - Lennox Adnova THS Series Installation, Operating And Maintenance Manual

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General Description

THS "Lennox Telecom Split" units composed by an evaporating indoor unit THSI for ceiling or wall installation and a
motor-condensing outdoor unit THSC, mainly for electronic equipped shelters, process centers, telecommunications sites
from 4.5 to 38 kW of nominal cooling capacity.
The system provides air filtration, indoor ventilation, cooling, heating, free cooling with outdoor fresh air to assure the
useful climate in the site.
1.1

Structure

All THS units have a galvanized sheet steel supporting base and enclosing panels are painted with epoxy polyester
powder coating cured at 180°C, or, on request, painted galvanized sheet steel (RALxxxx).
1.2

Field of application

All THS units are to be used within the operating limits stated in this manual (see Tab. 1); failure to comply with said
limits will invalidate the warranties provided in the contract of sale.
Tab. 1 Operating limits
Model: THS
Power supply
Min.
Outdoor
temperature
Max.
Temp. /
Min.
Humidity
Max.
conditions
Min.
Storage
conditions
Max.
1.3

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
On THS units are installed only primary brand scroll compressors of leading international manufacturers.
Today scroll compressors represent the best solution in terms of reliability, efficiency and MTBF.
Cooling components
• Molecular mesh activated-alumina filter dryer.
• Flow indicator with humidity indicator (indications are provided directly on the sight glass).
• Thermostatic valve with external equalization and integrated MOP function.
• High and low pressure switches.
• Schrader valves for checks and/or maintenance.
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 24V 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.
@DNOVA THS_R410A-IOM-1304-E
025 035 045
230Vac ±10% / 1Ph / 50Hz
- - 48.0°C 46.5°C
056 073 090
24Vdc ±16% (Emergency cooling)
48Vdc ±16% (Emergency cooling)
-20 °C
45.0°C 47.0°C
19 °C / 30% R.H.
35 °C / 50% R.H.
10 °C / 90% R.H.
55 °C / 90% R.H.
105 120 145
400Vac ±10% / 3Ph+N+PE / 50Hz
45.0°C 44.0°C -
310 380
45°C 47°C
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