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(26) 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)
SVE SVG
20S
<Low pressure
gas pipe>
<High pressure
gas pipe>
<Indoor unit>
(27) 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 “Main” or “Sub” 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 main and sub units.
Outdoor unit
CnT2
Branching
control
Operation mode
(Indoor unit)
(Remote control)
10 11 12 13
Ra Rb Rc Rd
m s s s
(i) Set main indoor unit address 10 to sub units 11-13 by “Address setting of main IU” setting of the wired remote controls
Rb-Rd.
(ii) Set the operation mode at cooling for the indoor unit 10 from the remote control Ra.
⇒
The
indoor unit 10 commands the cooling for the operation mode of “Sub” indoor units. It commands the cooling in
the same way also for the operation mode of “Sub” indoor units which are stopped.
When an operation mode change command for the indoor unit 10 is received from the central control device, the
command is released to the “Sub” indoor units in the same way
.
(iii)
Even
if an operation mode change is commanded to the “Sub” indoor units 11, 12 and 13 from the remote control Rb,
Rc, Rd or the central control device, the operation mode is not changed.
(28) High power operation (RC-EX3A only)
It operates at with the setting temperature xed at 16°C for cooling, 30°C for heating and maximum indoor fan speed for 15
minutes maximum.
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