HiRef HTI-CW, HTI-145, HTI-310, HTI-380, HTI-073 User Manual
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HTI
_CW
CW
5
HIGH
TECHNOLOGY
IN
REFRIGERATION
DEVICES
H T I - CW
Packaged Air Conditioning Unit
Chilled water unit
Users Manual
HF61G00269SB HTI-0-UM-GB_
GB
Rev. 20-05-201
HIGH TECHNOLOGY IN REFRIGERATION DEVICES
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HF61G00269SB HTI-0-UM-GB_CW
3
HIGH TECHNOLOGY IN REFRIGERATION DEVICES
Index
1 General Description.................................................................................................................. 4
1.1 Structure ...........................................................................................................................................4
1.2 Field of application ...........................................................................................................................4
1.3 Cooling circuit ...................................................................................................................................4
1.4 Hydraulic section ..............................................................................................................................6
1.5 Installation warnings .........................................................................................................................7
2 Inspection / Transport .............................................................................................................. 8
2.1 Inspection on receipt ........................................................................................................................8
2.2 Lifting and transport .........................................................................................................................8
2.3 Unpacking ........................................................................................................................................8
3 Installation ................................................................................................................................ 9
3.1 HTI - Indoor unit positioning .............................................................................................................9
3.2 Free-cooling duct connections (optional) ......................................................................................... 10
4 Electrical Connections ........................................................................................................... 11
4.1 Generalities ................................................................................................................................... 11
4.2 Starting up for the first time ........................................................................................................... 12
4.3 Starting operation .......................................................................................................................... 12
5 Operating Parameters Setting ............................................................................................... 12
5.1 Generalities ................................................................................................................................... 12
6 Maintenance ............................................................................................................................ 13
6.1 Warnings ....................................................................................................................................... 13
6.2 Periodical checks .......................................................................................................................... 13
7 Troubleshooting ..................................................................................................................... 15
HF61G00269SA HTI-0-UM-GB_CW
HIGH TECHNOLOGY IN REFRIGERATION DEVICES
1 General Description
HTS “HiRef Telecom Split” units composed by an evaporating indoor unit HTI for ceiling or wall installation, 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 HTS 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 HTS 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: HTI
073
105
120
145
310
380
Power supply
400Vac ±10% / 3Ph+N+PE / 50Hz
Storage
conditions
Min
Max
-10 °C / 90% R.H.
55 °C / 90% R.H.
1.3 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.
Cooling components
• Water valves
• Airflow switch
• Filter
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.
Microprocessor control
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:
• Alarm management: -
- Dirty filters alarm;
- Air flow alarm.
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HF61G00269SB HTI-0-UM-GB_CW
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HIGH TECHNOLOGY IN REFRIGERATION DEVICES
3 –
way valve
2-way valve
• Alarm signalling.
• Display of operating parameters.
• RS232, RS485 serial output management (optional).
• 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.
Fig. 1 Basic cooling circuits DX
2
1
2 1
5
M
4 M4
6
3
5
7
6
Pos Description Pos. Description
1 Chilled water inlet 5 Coil heat exchanger
2 Chilled water outlet 6 Breather valve
3 3-way valve 7 2-way valve (Opt.)
4 Plug fan
-
HF61G00269SA HTI-0-UM-GB_CW
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