–
64
–
'17 • KX-T-259
(23) Branching control (Heat recovery 3-pipe combination systems only)
(a) New control with new branching control (New Superlink control)
Control by means of CnT2 (The compressor does not stop at the switching of heating/cooling.)
CnT outputs – XR2: Heating output, XR3: Compressor ON thermostat output
(b) Old control with new branching control (Old Superlink control)
Control by means of CnT2 (The compressor stops at the switching of heating/cooling.)
(c) Control of the branching control when the heating/cooling is switched with the CnT2 output
①
20S control (CnT2-2: XB1)
②
SVH control (CnT2-3: XB2)
③
SVG control (CnT2-4: XB3)
④
SVE control (CnT2-5: XB4)
• Combination of XB1 – XB4 outputs (The branching control is controlled in the state of operations (I) – (V).)
State of operation
(I) Cooling
(Full stop, defrosting)
XB1
XB2
XB3
XB4
(II) Heating
(III) Oil return
(IV) Equalizing 1
(Cooling
→
Heating, etc.)
(V) Equalizing 2
(Heating
→
Cooling)
SVH
SVE
SVG
20S
(Adjustment required.)
<Low pressure
gas pipe>
<High pressure
gas pipe>
<Indoor unit>
(24) Multiple indoor units control (Heat recovery 3-pipe combination systems only)
(a) The indoor unit that controls the branching control directly is named as the master unit.
(i) Other indoor units that are connected to the same branching control are named as the slave unit.
(ii) Specify the “Master” or “Slave” for the indoor units from the remote control.
(b) Change of operation modes from the remote control, option control or other external device can be made for the master
unit only. It cannot be made for slave units.
(c) Operation mode of slave units is always same as that of the master unit.
(d) Any setting other than the operation mode can be made individually for the master and slave units.
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131
-
'16 • PAC-T-251
(d) If the cooling/heating selection signal is given by the external input, the operation mode is transmitted to the remote
control.
■
Selection of cooling/heating external input function
Notes (1) Regarding the priority order for combinations of CnT and CnTA, refer to Page 59.
External input selection
External input selection
Cooling/heating selection
External input method
⑤
Level
External terminal input
(CnT or CnTA)
Cooling/heating
Cooling/heating
(Competitive)
External terminal input
(CnT or CnTA)
Cooling/heating
Cooling/heating
(Competitive)
⑥
Pulse
Operation
OFF
Cooling zone
Heating zone
Cooling zone
Cooling zone
Heating zone
Heating zone
OFF
ON
OFF
OFF
ON
ON
ON
Cooling
Heating
Heating
Cooling
Cooling
Cooling
Auto
Auto
Cooling
Auto, cooling, dry mode command
↑
from remote control
↑
Heating, auto, heating mode command
from remote control
↑
Set “Cooling/
Heating” “Pulse”
↑
Auto, cooling, dry mode command
by remote control
↑
Auto, heating mode
command by remote control
↑
After setting “Cooling/heating selection”, the cooling/heating is
selected by the current operation mode.
During heating:: Set at the heating zone (cooling prohibition zone).
During cooling, dry, auto and fan mode: Set
at cooling zone (heating prohibition zone).
Heating
Heating
Heating
Cooling
Heating
Cooling
Cooling
(21) Room temperature detection temperature compensation during heating
With the standard
the compressor is turned ON/OFF with the thermostat setting temperature. When the thermostat
is likely to turn OFF earlier because the unit is installed at the ceiling where warm air tends to accumulate, the setting can be
changed with the wired remote control indoor unit function “
”. The compressor and the heater are turned ON/OFF at
one of the setting tempe3, +2 or +1°C in order to improve the feeling of heating. The setting temperature, however, has
the upper limit of 30°C.
Compressor
Compressor
Standard
Operation
Stop
Setting temperature
-1
+1
Room temperature (deg)
Operation
Stop
Setting temperature
+2
+4
Room temperature (deg)
When it is set at +3°C
(22) Return air temperature compensation
This is the function to compensate the deviation between the detection temperature by the return air temperature thermistor and
the measured temperature after installing the unit.
(a) It is adjustable in the unit of 0.5°C with the wired remote control indoor unit function “RETURN AIR TEMP”.
• +1.0°C, +1.5°C, +2.0°C
• -1.0°C, -1.5°C, -2.0°C
(b) Compensated temperature is transmitted to the remote control and the compressor to control them.
Note (1) The detection temperature compensation is effective on the indoor unit thermistor only.
