Demand control
Continuous heating operation
• System settings example
R2-Series
EP
R2-Series
P
WY-Series
WR2-Series
Y-Series
EP
Y-Series
P
This function reduces the capacity of the outdoor/heat source unit by way of the external input to the outdoor unit.
The capacity of the outdoor unit can be reduced in steps, with patterns ranging from 2 to 12 control steps depending on
the system. The number of steps that can be set and the corresponding capacity are shown below.
• 2 steps (0-100%) • 4 steps (0-50-75-100%) • 8 steps (0-25-38-50-63-75-88-100%)
• 12 steps (0-17-25-34-42-50-59-67-75-84-92-100%)
Relay circuit BMS etc.
(local design)
External input adapter
PAC-SC36NA-E
CN3D
(Outdoor unit control board)
Units operate at the
preset capacity.
When power consumption is centrally-controlled within a building, the system can be forced to operate in the
capacity-save mode by receiving external signals.
Heating
operation
Heating
operation
Defrosting
operation
Heating
operation
Defrosting
operation
Heating
operation
Heating
operation
Defrosting
operation
Heating
operation
Defrosting
operation
Possible usage
Warm and
comfortable!
R2-Series
EP
R2-Series
P
Y-Series
EP
Y-Series
P
• Image of continuous heating operation (single unit)
A command to reduce capacity is
sent to the outdoor unit
The heat exchanger of the outdoor unit is divided into two parts. Even when defrosting is necessary, one part of the heat exchanger
continues the heating operation.
• Image of continuous heating operation (combination)
With the combination model, units perform defrosting and heating alternately. While one unit is
performing defrosting, the other continues heating.
Conventional heating operation
Continuous heating operation
Continuous heating operation
Conventional heating operation
Continuous heating operation
Continuous heating operation
During continuous heating
operation, the heating operation
continues, so the heating capacity
does not completely drop.
You can enjoy a
comfortable
environment that is
continuously heated.
Heating is stopped
during the defrosting
operation, so room
temperature drops.
Normally, it is necessary to stop the heating operation during defrosting. However, the continuous heating operation
method makes it possible to perform defrosting without stopping the heating operation.
Reducing the stoppage time of the heating operation suppresses any drop in room temperature.
Use the dip switch on the outdoor unit to switch between the continuous heating operation method and conventional
defrosting method.
* Heating capacity drops during continuous heating operation.
Conventional defrosting operation
Continuous heating operation
The two parts of the heat
exchanger perform defrosting
and heating alternately.
The units perform defrosting
and heating alternately.
174
OUTDOOR UNIT FUNCTIONS
Summary of Contents for City Multi R2 Series
Page 1: ...CM20AN E NZ VRF City Multi Product Catalogue ...
Page 101: ...BC Controllers 101 ...
Page 112: ...Indoor Units VRF 112 ...
Page 114: ...Ceiling Cassette Type 4 Way Airflow Type 114 ...
Page 122: ...Ceiling Cassette Type 2 Way Airflow Type 122 ...
Page 128: ...Ceiling Concealed Type 128 ...
Page 150: ...Wall Mounted Type 150 ...
Page 154: ...Floor Standing Type 154 ...
Page 181: ...Ventilation Systems 181 ...
Page 190: ...Remote Controllers 190 ...