3. System
3.2. System configuration
(Intelligent multiple outdoor unit control
*1
)
3.3. Indoor operation range
Mode
Number of outdoor unit
HEX inlet air temp. operation range
Cooling
1 or more
15 - 32 °C
Heating
1
0 - 28 °C
2 or more
5 - 28 °C
*1. Interface system receives step request signal corre-
spond to total capacity of outdoor units, and calculates
necessary capacity for each outdoor unit automatically.
Note
• This intelligent multiple outdoor unit control function is
available only when Manual step mode is selected.
• Up to 6 outdoor units can be connected.
• 2 different type of outdoor units (capacity and/or series) can
be mixed,but connecting the same capacity outdoor units is
highly recommended.
• Ref. address setting on each outdoor unit is needed.
• Interface unit which connects to the Ref. address 0 outdoor
unit, becomes main interface unit.
• Connect AHU local controller (Part No. 9) to the main inter
-
face unit.
• Connect ONE remote controller (Part No. 2) to the interface
unit.
• Connect between the interface units with a remote control
-
ler (daisy chain). MAX. : 500m
• When using this function, set the DIP SW 1-8 of all inter
-
face unit to ON.
• Do NOT select STEP 0 for 3
minutes after compressor is
ON. (Keep compressor ON for 3 minutes at least.)
•
When changing STEP, make it less than 5 steps in a single
operation, and keep at least 5 minutes interval between the
changes.
• Keep operation range shown at the following section 3.3.
• Do NOT send STEP 0 during defrost operation.
• Do NOT change operation mode frequently.
No.
Part name
System (2-1)
1
Interface unit
2
Remote controller
3
Outdoor unit
4
Target air temp. thermistor (TH1)
─
*2
5
Ref. liquid temp. thermistor (TH2)
6
2-Phase temp. thermistor (TH5)
*3
7
HEX inlet (Coil on) temp. thermistor (TH11)
8
Air-Handling Unit (AHU) (Local supply)
9
AHU local controller (Local supply)
10
Heat exchanger of AHU (Local supply)
11
Target air temp. thermistor (Local supply)
12
Louver (Local supply)
13
Air filter (Local supply)
14
Heat recovery (Local supply)
15
Fan (Local supply)
*2. Set the DIP SW 2-8 to ON.
*3. If outdoor unit is SHW series, It’s not needed to install
this thermistor, and set the DIP SW 1-5 to ON.
9
12
8
5
6
7
11
10
13
15
14
2
<Fig. 3.2.1>
(2-1) Manual step mode (example)
3(Ref. adress: 0)
Outdoor Air
(O.A.)
Supply Air
(S.A.)
1(Main)
Exhaust Air
(E.A.)
3(Ref. adress: 1)
Return Air
(R.A.)
1(Sub)
6
EN
