Danfoss Optyma Plus, Инструкции по применению

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Application range
3.1 Main applications
3.2 Condensing unit
selection
Optyma
™
Plus INVERTER is a perfect cooling
solution for typical MBP applications like food
retail, petrol forecourt sites, cold rooms ,and
display cases. All units are fully wired and factory
tested. They have one cabinet sizes and are
equipped with one fan.
Optyma
™
Plus INVERTER outdoor condensing
units are released for R448A/R449A, R407A/F and
R404A.
Inverter technology offers more flexibility in
condensing unit selection than fixed-speed units.
Selection of the right inverter condensing unit
size can be made by next method:
Select a condensing unit size which achieves the
peak load system cooling capacity demand at its
maximum speed.
NOTICE
It is compulsory to secure that
condensing unit capacity at minimum speed
(30 rps) will not be higher than necessary
cooling capacity for the smallest evaporator!
In case minimum (at 30 rps) condensing unit
capacity is higher than capacity of smallest
evaporator it can cause work of condensing
unit outside its application envelope and as
consequence reduce lifetime.
Example1 (evaporating temperature -10 °C,
ambient temperature 32 °C, R404A):
Evaporator1= 3 kW
Evaporator2= 3 kW
Evaporator3= 3 kW
Total Q = 9 kW (maximum cooling capacity)
Minimum cooling capacity = minimum
evaporator capacity = minimum evaporating
capacity = 3kW
According to the capacities at evaporating -10 °C,
ambient 32 °C and refrigerant R404A condensing
unit OP-MPPM044 (maximum capacity 9 kW)
achieves the peak load system cooling capacity
(9,3 kW) demand at its maximum speed and
at the same time condensing unit capacity at
minimum speed (minimum capacity 3 kW) is not
higher than necessary cooling capacity for the
smallest evaporator (3 kW).
Example2 (evaporating temperature -10 °C,
ambient temperature 32 °C, R404A):
Evaporator1= 1 kW
Evaporator2= 2,1 kW
Evaporator3= 2,5 kW
Evaporator4=1,5 kW
Total Q = 7,1 kW (maximum cooling capacity)
Minimum cooling capacity = minimum
evaporator capacity = Evaporator1 = 1 kW.
According to the capacities at evaporating -10 °C,
ambient 32 °C and refrigerant R404A condensing
unit OP-MPPM035 (maximum capacity 7,2 kW)
achieves the peak load system cooling capacity
(7,1 kW) demand at its maximum speed but
at the same time condensing unit capacity at
minimum speed (minimum capacity 2,3 kW) is
higher than necessary cooling capacity for the
smallest evaporator (1 kW).
In this case it is recommended to connect
few evaporators together (regulated by one
thermostat) to achieve smallest required capacity
higher than minimum capacity of condensing
unit: by managing Evaporator1 and Evaporator4
via one thermostat minimum required capacity
will be 2,5 kW (Evaporator2) which is higher than
minimum capacity of condensing unit at low
speed (2,3 kW).
NOTICE
Compressor of Optyma™ Plus
INVERTER is equipped with a IPM (Interior
Permanent Magnet) motor. The compressor
cannot operate without frequency converter.
It will be destroyed immediately if connected
directly to public network. The applied frequency
from the inverter will be 60 Hz for 30 rps (1800
rpm) up to 200 Hz for 100 rps (6000 rpm).
Please refer to the table below
Compressor speed Min Max
rps 30 100
rpm 1800 6000
Drive output frequency Hz 60 200
14
FRCC.PC.044.A6.02
Application Guidelines