@DNOVA THS_R410A-IOM-1304-E
2
1
General Description
THS
“
Lennox
T
elecom
S
plit” 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
025
035
045
056
073
090
105
120
145
310
380
Power supply
230Vac ±10% / 1Ph / 50Hz
400Vac ±10% / 3Ph+N+PE / 50Hz
24Vdc ±16% (Emergency cooling)
48Vdc ±16% (Emergency cooling)
Outdoor
temperature
Min.
-20 °C
Max.
-
-
48.0°C
46.5°C
45.0°C
47.0°C
45.0°C
44.0°C
-
45°C
47°C
Temp. /
Humidity
conditions
Min.
19 °C / 30% R.H.
Max.
35 °C / 50% R.H.
Storage
conditions
Min.
10 °C / 90% R.H.
Max.
55 °C / 90% R.H.
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.
