Page 2 - IOM / TELECOOL THN - 0104 - E
GENERAL DESCRIPTION
Structure
All THN units have a galvanised sheet steel supporting base,
and enclosing panels made galvanised sheet steel coated with
epoxy polyester powder paint oven cured at 180°C (RALxxxx).
The unit features an exclusive design which, combined with a
rational layout of components and extremely compact
dimensions, lends it an attractive appearance.
Field of Application:
Model
Power supply
Minimum outdoor
temperature T
Maximum outdoor
temperature T
Minimum indoor
temp./humidity conditions
Maximum indoor
temp./humidity conditions
Storage conditions
Cooling circuit
The entire cooling circuit is built in the HiRef 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 THN units.
Today scroll compressors represent the best solution
in terms of reliability, efficiency and MTBF.
Cooling components:
o
Molecular mesh activated-alumina filter dryer
o
Flow indicator with humidity indicator.
Indications are provided directly on the sight
glass.
o
Thermostatic valve with external equalization
and integrated MOP function.
o
High and low pressure switches
o
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.
The board may be accessed through a door after the
main switch has been put off. All the remote controls
use 24 V signals powered by an insulating transformer
situated on the electric control board.
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;
o
Switching on/off of compressor to maintain the
temperature set point T inside the shelter
o
Alarm management
High / low pressure
Dirty filters alarm
Air flow alarm
o
Alarm signalling
o
Display of operating parameters
o
RS232, RS485 serial output management
(optional)
o
Phase sequence error [Not displayed by the
mP, but prevents the compressor from starting
up]
[see microprocessor control manual for further details, also
in relation to particular customer specifications]
GENERAL DESCRIPTION
THN “HiRef Telecom units” are air conditioners for low- and
medium-powered telephone exchanges. They are designed
to be mounted inside shelter.
THN air conditioners are direct expansion package units with
an air-cooled condenser system. They are distinguished by
an innovative air circulation system which significantly
enhances performance in all operating conditions.
THN
THN
THN
045
056
073
/-10%
24 Vdc +/- 16% - 48 Vdc +/- 16%
- 20 °C
45 °C
45 °C
45 °C
19 °C - 30 % r.h.
35 °C - 50 % r.h.
-10 / 90 % r.h.
+ 55 / 90 % r.h.
THN
THN
THN
THN
THN
090
105
120
150
170
/-10% /3/50 + N
24 Vdc +/- 16% - 48 Vdc +/- 16%
- 20 °C
46 °C
45 °C
46 °C
46 °C
45 °C
19 °C - 30 % r.h.
35 °C - 50 % r.h.
-10 / 90 % r.h.
+ 55 / 90 % r.h.
THN 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.
