Blue Box SIGMA 2002, Installation, Installation, Operating, Operating, And Maintenance Manual

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Blue Box - 3
VARIOUS ACCESSORIES
- Rubber antivibration mountings.
- Timber crate packing
- Pallet/skid for shipment in a container
- Non-standard RAL paint colours
- Unit completely pre-assembled, the unit will be supplied without refrigerant charge, test and PED certificate.
- Modular pre-asembled unit, only 4 compressors models, with the exception of model 14.4.
REFRIGERANT CIRCUIT ACCESSORIES:
- Compressor suction and discharge valves
Ball valve fitted in the equalisation line
- Pressostatic valve (with solenoid valve on heat pump)
- Liquid line solenoid valve
- Pressure gauges.
On all units with a PCO
2
controller the suction and discharge pressures are displayed on the controller. Gauges
on standard units are located inside the compressor compartment.
- Liquid receivers (standard on versions /LE/HP e LC/HP LC/DC e DC)
- Dual set-point.
With double thermostatic expansion valves and solenoid valves, the evaporator of “double set point units” is
sized on the basis of high temperature operation.
On units with
m
CHILLER control, the set must be manually modified on the microprocessor control panel.
On units with pCO
2
control the two values can be set from the keypad or via a digital input. In all cases the
commutation between the two thermostatic expansion valves is automatic on the basis of the water tempera-
ture. Thermostatic expansion valve selection is made according to the temperature values specified at the time
of order. The operating limits remain unchanged and are as per the catalogue. If glycol is used, in a sufficient
percentage to avoid freezing, the lower limit of the leaving water is extended to a minimum of -5 °C.
- Condenser for well water (only standard version and LE).
HYDRAULIC CIRCUIT ACCESSORIES
- Leaving water temperature control.
Available only on units with control pCO 2 (not HP versions).
- Water manifold
(only 4 compressors models). Available for condensers, evaporators and heat recovery.
ELECTRICAL ACCESSORIES
- Power factor correction cos f
f
g 0.9 at nominal operating conditions
- Single voltage-free contacts for machine status signals
- Serial interface. In units with a
m
CHILLER controller ( 3.2-13.2) the serial interface is the RS485 type with a Carel
protocol. In units with a PC0
2
control (from 14.4-26.4 excluding HP versions) the serial interface is the RS485
type with a Modbus protocol. Special protocols can be ordered: Carel; Echelon in RS485 or FTT10 versions. HP
units can be supplied with a Macroplus microprocessor controller with a RS422 type serial interface; refer to the
manual enclosed with the unit.
- Remote user terminal panel (in addition to the standard terminal)
Not available on HP units (with a Macroplus controller)
- Set point variable with remote signal (0-1V, 0-10V, 0-4mA, 0-20mA) available only on units with a PC0
2
controller, only in cooling mode. At the time of order. The set point values must be specified at the time of
order.
SIGMA LN: low noise unit
Low noise units units are completely enclosed with painted steel panels lined with sound absorption material
having an intermediate layer of high acoustic impedance material.