The new generation of the Carrier 06T screw compressors
benefits from Carrier’s long experience in the development of
twin-rotor screw compressors. The compressor is equipped
with bearings with oversized rollers, oil pressure lubricated for
reliable and durable operation, even at maximum load.
A variable control valve controlled by the oil pressure permits
infinitely variable cooling capacity. This system allows optimal
adjustment of the compressor cooling capacity and ensures
exceptionally high stability of the chilled water leaving
temperature.
Among the other advantages: if a fault occurs e.g. if the
condenser is fouled or at very high water temperature, the
compressor does not switch off, but continues operation with
a reduced capacity (unloaded mode).
The silencer in the discharge line considerably reduces
discharge gas pulsations for much quieter operation.
The condenser includes an oil separator that minimises the
amount of oil in circulation in the refrigerant circuit and redirects it to the compressor function.
Controls
Touch Pilot Control
HEATING
Touch Pilot control, 5” user interface
■■ New innovative smart control features:
-- An intuitive and user-friendly, coloured, 5'' interface
(7" optional)
-- Direct access to the unit's technical drawings and the
main service documents
-- Screen-shots with coincisive and clear information in
local languages
-- Complete menu, customised for different users (end
user, service personnel and Carrier-factory technicians)
-- Easy access to the controller box with inclined touch
screen mounting to ensure legibility under any lighting
conditions
-- Safe operation and unit setting: password protection
ensures that unauthorised people cannot modify any
advanced parameters
-- Simple and "smart" intelligence uses data collection
from the constant monitoring of all machine
parameters to optimise unit operation.
■■ Energy management:
-- Internal time schedule clock controls chiller on/off
times and operation at a second set-point
-- The DCT (Data Collection Tool) records the alarms
history to simplify and facilitate service operations.
Remote Management (Standard)
■■ Units with Touch Pilot control can be easily accessed
from the internet, using a PC with an Ethernet connection.
This makes remote control quick and easy and offers
significant advantages for service operations.
■■ The 30XW also communicates with other building
management systems via optional communication
gateways.
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■■ The 30XW is equipped with an RS485 serial port that
offers multiple remote control, monitoring and diagnostic
possibilities. Carrier offers a vast choice of control products,
specially designed to control, manage and supervise the
operation of an air conditioning system. Please consult
your Carrier representative for more information.
■■ The following commands/visualisations are possible from
remote connection:
-- Condenser pumps control: a digital input allows
verification of condenser water flow (the flow switch
must be supplied by the installer)
-- Start/stop of the machine
-- Dual set-point management: through a dedicated
contact is possible to activate a second set-point
(example: unoccupied mode)
-- Demand limit setting: to limit the maximum chiller
capacity to a predefined value
-- Operation visualization: indication if the unit is
operating or if it's in stand-by (no cooling load)
-- Alarm visualization.
Remote management
(EMM option)
■■ The Energy Management Module offers extended remote
control possibilities:
-- Room temperature: permits set-point reset based
on the building indoor air temperature (with Carrier
thermostat)
-- Set point reset: ensures reset of the cooling set-point
based on a 4-20 mA or 0-10 V signal
-- Demand limit: permits limitation of the maximum
chiller power or current based on a 0-10 V signal
-- Demand limit 1 and 2: closing of these contacts
limits the maximum chiller power or current to two
predefined values
-- User safety: this contact can be used for any
customer safety loop; opening of the contact
generates a specific alarm
-- Ice storage end: when ice storage has finished,
this input permits return