Western Airconditioning MU ECHOS A - HYDRAULIC SYSTEM OPTIONS AND ACCESSORIES; HYDRAULIC OPTIONS (;ST 1 P,;ST 1 PS); KEY ACCESSORY DETAILS; REMOTE CONTROL FUNCTIONALITY

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MU ECHOS A
mode and no heat exchanger on the source side in order to
allow connection to a remote air-cooled condenser/evaporator.
The unit has a fluid receiver sized for the remote condenser
supplied by Blue Box.
The unit is loaded with nitrogen instead of refrigerant.
/LN
low-noise unit
The sizes 6, 8 and 11 with this outfit require the replacement
of the standard sound absorbing material with a multi-layer
acoustic insulation of high impedance.
The sizes from 16 to 48 require the installation of a sound-
proof cover on the compressor. This outfit can be combined
with all aforementioned versions of the unit
HYDRAULIC SYSTEM OPTIONS
The unit basic version has no circulation device or pump instal-
led (except for the 6, 8 and 11 sizes). All the outfits (except for
LE and LE/HP) can be equipped upon request with one of the
following hydraulic modules:
/ST 1P
Besides the standard components installed, the unit has a
circulation pump. This version is not suitable for the 6, 8 and
11 sizes.
/ST 1PS
Besides the standard components installed, the unit has an
inertial insulated storage tank and a circulation pump. The sizes
6, 8, 11 and from 16 to 48 of the HP version have the safety
valve and the expansion vessel fitted as standard.
This version is standard for the sizes 6, 8 and 11 while for the
other sizes it must be requested when ordering.
STANDARD EQUIPMENT
•Flowswitch(installedformodels6,8,11,equipedbutnot
installed on other models)
•Summer/Wintermodeselectionondigitalinput(tobespe-
cified with the order)
•RemoteOn/Offcontroldigitalinput
•Self-adaptablecontrollogic
ACCESSORIES
REFRIGERANT CIRCUIT ACCESSORIES
• Condensing cntrl. with pressure control valve for well water
(standard on HP version)
• Condensing control with pressure control valve for tower
water
• Fitting for tower water (in-out 30/35 °C)
• Pressure gauges
• Liquid line shut-off valve
• Liquid line solenoid valve
• Electronic expansion valve
• Brine Kit
HYDRAULIC CIRCUIT ACCESSORIES
•Automaticfillingkitwithpressuregauge(onlyfor1PSver-
sion)
• Expansionvessel (forST 1PSversiononly; standardon ST
1PS/ HP version)
• Water safety valve (ST 1PS version only, standard on ST 1PS/
HP version)
•Upwardhydrauliccircuitconnections
ELECTRICAL ACCESSORIES
•Powersupply:400/3+N/50
•Setpointcompensatedaccordingtoexternalairtemperature
•Remotecontrolterminal
•Userinterface
•RS485serialinterface
•Singleoperationvoltage-freecontacts
•Electronicsoft-starter
VARIOUS ACCESSORIES
•Rubberantivibrationmounts
“BRINE KIT”ACCESSORY
It is applied if the evaporator output temperature is included
within +3°C and -8°C. It consists in a higher thermal insulation
of the exchanger and piping, a specific calibration of the low
pressure switches and of the anti-freeze alarm, and dimensio-
ning check of the mechanical thermostatic valve.
If it is not included in the set-up, the “Check condensation”
accessory must be added.
ELECTRONIC THERMOSTATIC VALVE
L’utilizzo di questo accessorio è particolarmente indicato sulle
unità che si trovano ad operare in condizioni di carico termico
molto variabile o di modalità di funzionamento variabili, come
nel caso della gestione congiunta di condizionamento e pro-
duzione di acqua ad alta temperatura. L’impiego della valvola
termostatica elettronica infatti permette di:
• massimizzare lo scambio termico all’evaporatore
• minimizzare i tempi di risposta alle variazioni del carico e di
condizioni operative
• ottimizzare la regolazione del surriscaldamento
• garantire la massima efficienza energetica
SELF-ADAPTABLE REGULATION LOGIC
This function allows the unit control to dynamically vary the
outlet water set point according to the stop and functional
cycles of the machine: in practice, by increasing and reducing
the water outlet temperature, the control avoids that compres-
sor start-ups are too close in time, decreasing the number of
peaks and protecting the unit components
REMOTE ON/OFF FROM DIGITAL INPUT
This function is standard on all units and consists in a remote
contact that allows to switch on and off the machine through a
signal that can be taken inside the building by a BMS (Building
Management System) system.