AIR-COOLED LIQUID CHILLERS WITH
INTEGRATED HYDRONIC MODULE 30RB 602-802
-- Ice storage end: When ice storage has finished,
this input permits return to the second set point
(unoccupied mode)
-- Time schedule override: Closing of this contact
cancels the time schedule effects
-- Out of service: This signal indicates that the chiller is
completely out of service
-- Chiller capacity: This analogue output (0-10 V) gives
an immediate indication of the chiller capacity
-- Compressor operation: This contact signals that one
or several compressors are in operation
Units with fans with available pressure
for indoor installation (option 12)
30RB units equipped with fans with available pressure are
designed to operate with air discharge ducts with maximum
pressure drops of 200 Pa.
To compensate for these pressure drops 30RB units with
option 12 are equipped with variable-speed fans with a
maximum speed of 19 r/s, instead of 15.8 r/s and fixedspeed fans as for the standard units.
All fans in the same refrigerant circuit are controlled by a
single-speed variator and therefore all run at the same speed.
The full-load or part-load speed is controlled by a patented
algorithm that permanently optimises the condensing
temperature to ensure the best unit energy efficiency (EER)
whatever the operating conditions and pressure drops of the
system ductwork.
Each refrigerant circuit (A, B and C) must have a separate
ducting system to prevent any air recycling between the
condensers of the different refrigerant circuits.
In 30RB units with option 12 each fan is equipped with a
factory-installed connection interface, allowing the connection to the ducting system for the specific circuit (A, B and C)
for each fan. Please refer to the unit dimensional drawings for
the exact dimensions of the connection interface.
The unit cooling capacity and energy efficiency ratio (EER)
vary depending on the duct pressure drops:
-- Between 0 and 100 Pa the unit cooling capacity is
only slightly affected
-- Between 100 and 200 Pa the unit cooling capacity
falls considerably depending on the operating
conditions (outdoor air temperature and water
conditions).
Please refer to the curves below to evaluate the impact of the
estimated duct system pressure drop for the installation and
the impact of different full load operating conditions on the
30RB unit cooling capacity and EER.
Duct pressure drop, Pa
C
A
R
EER variations for operating conditions
that differ from Eurovent conditions
R
I
E
R
2
0
1
6
/
CONTROLS
EER variation coefficient
Cooling capacity variation coefficient
Cooling capacity variations for operating
conditions that differ from Eurovent conditions
Duct pressure drop, Pa
2
0
1
7
HEATING HEATING
This option applies to 30RB units installed inside the building
in a plant room. For this type of installation the hot air leaving
the air-cooled condensers is discharged by the fans to the
outside of the building, using a duct system.
AIR TREATMENT
-- 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 0-5 V signal
-- Demand limit: Permits limitation of the maximum
chiller demand based on a 4-20 mA or 0-5 V signal
-- Demand limit 1 and 2: Closing of these contacts limits
the maximum chiller capacity to three predefined
values
-- User safety: This contact can be used for any
customer safety loop, closing of the contact
generates a specific alarm
COOLING
Remote management (EMM option)
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