Environmentally balanced
■■ Non-ozone depleting refrigerant R410A
-- Chlorine-free refrigerant of the HFC group with zero
ozone depletion potential
-- Very efficient - gives an increased energy efficiency
ratio (EER, COP and ESEER)
■■ Leak-tight refrigerant circuit
-- Brazed refrigerant connections for increased leaktightness (factory nitrogen charge)
-- Verification of pressure transducers and temperature
sensors without transferring refrigerant charge.
Superior reliability
■■ Auto-adaptive control
-- Automatic compressor unloading in case of
abnormally high condensing pressure. If an anomaly
occurs (e.g. fouled air heat exchanger coil, fan failure)
the condensing unit continues to operate, but at
reduced capacity.
■■ Exceptional endurance tests
-- Corrosion resistance tests in salt mist in the laboratory
-- Accelerated ageing test on components that are
submitted to continuous operation: compressor
piping, fan supports
-- Transport simulation test in the laboratory on a
vibrating table.
■■ State-of-the-art concept
-- Cooperation with specialist laboratories and use of
limit simulation tools (finite element calculations) for
the design of the critical components, e.g. motor
supports, suction/discharge piping, etc.
Controls
Pro-Dialog+ control
Carrier Comfort Network (CCN)
operating mode
Carrier Comfort Network (CCN) operating mode
Remote operating mode with
volt-free contacts (standard)
-- S
tart/stop: opening of this contact will shut down the
unit
-- Alarm indication using an LED: availability of a volt-free
contact that indicates the presence of a major fault
that has led to the shut-down of one or two refrigerant
circuits.
-- User safety: this contact can be used for any
customer safety loop, opening of the contact
generates a specific alarm.
Operating limits, Standard units
Operating range
50
45
38RBS
Minimum
Maximum
Evaporator
Suction temperature (dew point) °C
-5
15
Condenser
Entering air temperature*
-10
48
°C
* For transport and storage of the 38RBS units the minimum and maximum allowable
temperatures are -20°C and +48°C. It is recommended that these temperatures are used
for transport by container. Option 28 allows stable unit operation at air temperatures below
-10°C and down to -20°C.
40
Room temperature, °C
AIR TREATMENT
Pro-Dialog+ combines intelligence with operating simplicity.
The control constantly monitors all machine parameters and
precisely manages the operation of compressors and fans for
optimum energy efficiency.
■■ Energy management
-- Seven-day internal time schedule clock: permits unit
on/off control and operation at a second setpoint
-- Setpoint reset by the user via a room sensor (option).
■■ Integrated features
-- Night mode: capacity and fan speed limitation for
reduced noise level
-- Solenoid valve control for evaporator pumpdown
(valves supplied as a kit with the unit).
A simple two-wire communication bus between the RS485
port and the Carrier Comfort Network 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 on these products.
35
30
25
20
15
10
5
0
-5
-10
-15
-10
-5
0
5
10
20
15
Suction temperature (dew point), °C
746
C
A
R
R
I
E
R
2
0
1
6
/
2
0
1
7