HRAT E - HRAT/HRAN
4
English 09/02
DESCRIPTION OF STANDARD UNIT
These air cooled chillers with axial-flow fans and cycle
reversal operate with R22 refrigerant fluid (HRAT-HRAN)
or R407c refrigerant fluid (HRAT E), and are designed for
external installation. The units conform to the essential
requisites of EEC directive 89/392. They are factory tested
and on site installation is limited to water and electrical
connections.
STRUCTURE
Panels and bed plate are made from
cataphoretic coat-
ed galvanised steel
to ensure total resistance to atmos-
pheric agents.
COMPRESSORS
Hermetic
rotary scroll
compressor with sump heater
and thermal cut-out.
EVAPORATOR
AISI 316 stainless steel plate-type evaporator complete
with differential pressure switch.
Casing lined with
anti-condensate closed cell neoprene cladding.
CONDENSING COILS
With copper tubes and high surface area aluminium fins.
Coil protection grilles as standard (HRAT E models).
FANS
External impeller axial-flow fans. Six-pole electric motor
with built-in thermal cut-out.
Housed in aerodynamic draught tubes with accident pre-
vention grill.
Device for operation in low external air
temperatures with pressure transducer for contin-
uous regulation of fan rotation speed.
REFRIGERANT CIRCUIT
The refrigerant circuit includes the following components:
filter, fluid passage indicator, thermostatic expansion valve
with external equaliser. Safety pressure switches to control
delivery and intake pressures. Unit complete with non-
freezing oil and R22 (HRAT-HRAN) or R407c refrigerant
(HRAT E).
Factory tested.
POWER AND CONTROL ELECTRICAL PANEL
Power and control electrical panel constructed in accor-
dance with IEC 204-1/EN60204-1, complete with compres-
sor contactor and thermal solenoid switch and
door lock
safety device. Control via “HSW3” control panel.
OPTIONAL ACCESSORIES
- Removable metal mesh filter.
- Pump kit
- Inertial storage kit with pump, safety valve, filling assem-
bly, air vent valve, expansion tank, pressure gauge and
drain valve.
- Storage tank connection pipes.
- Rubber vibration dampers.
- Condensate collection pan kit.
- Remote keyboard kit.
- Serial interface kit.
- Protection grille kit (HRAT-HRAN models).
The above accessories are optional. Consult the relative
documentation for assembly instructions and technical
data.
9
8
7
4
5
2
1
3
6
10
11
1
Electrical panel
2
Control panel.
3
Plate heat exchanger
4
Low pressure switch
5
High pressure switch
6
Flow indicator
7
Scroll compressor
8
Dewatering filter
9
Thermostatic valve
10
Axial-flow fan
11
Finned coil
A
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