9
SECTION II: INSTALLATION AND MAINTENANCE
II
SECTION II: INSTALLATION AND
MAINTENANCE
II.1
CONSTRUCTION FEATURES
o
Load-bearing structure and panels in galvanised and RAL 9018
painted sheet metal; galvanised steel sheet metal base.
o
The structure consists of two sections:
technical compartment in galvanised sheet metal insulated internally
with noise-absorbing material for housing the compressors, the
electrical panel and the main components of the cooling circuit;
Aeraulic compartment for housing the heat exchange coils, the plate
exchangers, the centrifugal Plug-Fans and accessories of the pumping
unit (if present).
o
Hermetic, Scroll-type rotary compressors complete with internal
thermal protection and crankcase resistance activated automatically
when the unit stops (provided the unit remains powered).
o
Adequately insulated water side braze-welded plate heat exchanger
in stainless steel. Air side heat exchanger consisting of a coil in copper
pipes and aluminium fins.
o
Brushless centrifugal Plug-Fans with internal thermal protection set
in a single row with horizontal flow.
o
Horizontal condensation/evaporation flow opposite the finned coil or
vertical flow that can be transformed on site.
o
Electronic proportional device for pressure and continuous
adjustment of the fan rotation speed, up to a minimum outdoor air
temperature of -10°C/-15°C when operating as a chiller, and up to a
maximum outdoor air temperature of 40°C when operating as a heat
pump.
o
Victaulic-type hydraulic connections.
o
The differential pressure switch that protects the unit from any water
flow interruptions.
o
Single cooling circuit made of a mild copper tube (EN 12735-1-2)
complete with: cartridge drier filter, load connections, manually reset
high pressure safety switch, automatically reset low pressure switch,
safety valve/s, tap on the liquid line (only on 270-2160), thermostatic
expansion valve (1 for EQU-PF and 2 for EQUH-PF), cycle inversion
valve (for EQUH-PF), liquid receiver (for EQUH-PF) and non-return
valves (2 only on EQUH- PF), liquid indicator, gas separator in
compressor intake and solenoid valve on the liquid line (EQUH-PF
270-2160) and intake line insulation.
o
Unit with IP24 protection rating.
o
The unit is complete with R410A refrigerant fluid.
o
Ducted drain for the condensation (EQUH-PF).
II.1.1
Available set-ups
Standard:
Installation without pump and without storage tank.
Pump:
P1
– Installation with pump.
P2
– Installation with increased head pump.
DP1
– Installation with double pump, one of which in standby with
automatic activation.
DP2
– Installation with increased head double pump, one of which in
standby with automatic activation.
The pumping unit is also complete with:
Expansion tank, safety valve and water side pressure gauge.
In the case of a single pump, the unit is also complete with a delivery
shut-off valve.
In the case of a double pump, the unit is complete with a non-return
valve and an intake valve for each pump.
Tank & Pump:
ASP1
– Installation with pump and storage tank.
ASP2
– Installation with increased head pump and storage tank.
ASDP1
– Installation with double pump, one of which in standby with
automatic activation and storage tank.
ASDP2
– Installation with increased head double pump, one of which in
standby with automatic activation and storage tank.
In addition to that supplied with the Pump accessory, the unit also
includes:
Flow inertial storage tank (150 l for models 233-265; 250 l for models
270÷2100, 450 l for models 2115÷2160), relief valve, water drain valve
and electrical resistance connection.
II.1.2
Electrical panel
o
Electrical panel accessed by opening the front panel, compliant with
IEC Standards in force, can be opened and closed with a suitable tool.
o
Complete with:
electrical wiring for 400V-3ph+N-50Hz power voltage;
230V-1ph+N-50Hz auxiliary circuit power supply from the main
power supply;
24V-1ph-50Hz control power supply from the main power supply;
main isolating switch on the power supply, complete with a door
locking safety device;
automatic circuit breaker switch protecting the compressors and
fans;
protection fuse for the auxiliary circuit;
compressor power contactor;
machine remote controls: ON/OFF and summer/winter selector;
remote machine controls: compressors work light and general block
light.
o
Programmable electronic board with microprocessor, controlled by
the machine keyboard.
o
The board performs the following functions:
regulation and control of the machine outlet water temperature
settings; of the cycle inversion (EQUH-PF); of the safety timers; of the
circulation pump; of the system compressor and pump hour-run meter;
of the pressurised defrost cycles; electronic anti-freeze protection that is
automatically activated when the machine is off; and of the functions
that control the operations of the individual parts making up the
machine;
complete protection of the machine, possible shutdown and display
of all the triggered alarms;
compressor protection phase sequence monitor;
unit protection against low or high supply voltage on the phases;
display of the programmed settings; of the in/out water temperatures
via the display; of the condensation and condensation/evaporation
pressures (EQUH-PF); of the voltage values in the three phases of the
electrical circuit that powers the unit; of the alarms via the display; and
of the chiller or heat pump operation via the display (EQUH-PF);
user interface menu;
automatic pump operating time balance (DP1-DP2, ASDP1- ASDP2
set-ups);
pump standby automatic activation in case of an alarm (DP1-DP2,
ASDP1-ASDP2 set-ups);
displayed inlet water temperature at the recovery
unit/desuperheater;
alarm code and description;
alarm history management (manufacturer password-protected
menu).
Summary of Contents for EQU-PF 2100
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