803 B – 04/11 D – pag. 7/24
Standard Accessories (furnished on basic unit)
Modulating condenser water flow valve –
Factory mounted on condenser outlet water connection, in order to
allow fast and safe unit starting. It is not supplied for condensers with water side pressures higher than 10 bar.
Discharge line check valve
– Ensures compressors maintainence operations without any refrigerant loss.
Star Delta Compressors starter –
For low inrush current and reduced starting torque.
Phase monitor –
The phase monitor controls the voltage values on the supply line stopping the unit when the
calibration threshold is reached (± 10%). This safety device is automatically reset.
Evaporator connection water side Victaulic –
Hydraulic joint with gasket for an easy and quick water
connection.
Insulation around the evaporator
– Insulation 20 mm thickness to protect the evaporator against freezing.
Hour run meter –
Digital compressors hour run meter.
General fault contactor –
Contactor for the alarm warning.
Options (on request)
Brine double set point version (CB)
- Dual leaving glycol mixture temperature setpoints. The lower setpoint can
go down to -8°C.
Compressor thermal overload relays -
Safety devices against compressor motor overloading in addition to the
normal protection envisaged by the electrical windings.
Ammeter and voltmeter
- Digital meters of unit drawn amperes and voltage values, installed on the electrical
control panel.
Condenser power factor correction
- Installed on the electrical control panel to ensure it conforms to the plant
rules. (McQuay advices maximum 0,9).
Suction line shut off valve
– Suction shut-off valve installed on the suction port of the compressor to facilitate
maintenance operation.
Flanged connections –
Evaporator and condenser flanged connections (150 psig) are available instead of the
standard victaulic connections.
Marine water boxes –
Evaporator and condenser can be furnished with marine water boxes with victaulic or
flanged connections (on request). To save time and work marine water boxes cover can be easily removed to
clean internal tubes without the disconnection of water pipes.
Double water pressure differential switch –
Factory mounted differential switch is available as option to detect
evaporator and condenser loss of flow .
Flow switch
- Supplied separately to be wired and installed on the evaporator water piping (by the customer).
Cu-Ni 90-10 condenser –
To work with sea water the heat exchangers are fitted with Cu-Ni tubes and special
protection inside the end covers.
Rubber type antivibration mounts
( Pads ) - Supplied separately, must be positioned under the base of the unit.
Sound proof cabinet
- Made of sheet metal and internally insulated, the cabinet is "integral kind" ( around the
whole chiller, not only around the compressors ) to reach the best performance in noise reduction.
Note:
to realize the baseframe consider that the dimensions of the sound proof cabinet are 300 mm longer, 300 mm wider and
200 mm higher than the standard unit. The cabinet is supplied in a separated non assembled kit.
Witness tests
- The units are normally tested at the test bench prior to the shipment. On request, a second test
can be carried out, at customer’s presence, in accordance with the procedures indicated on the test form. (Not
available for units with Glycol mixtures).
Soft start
– Electronic starting device to reduce inrush current.
