47
9.1.1 Requirements
<Outdoor unit>
(a) Up to 6 units can be connected.
(b) All the outdoor units must be of the same model.
(c) The outdoor units must be connected to sub units.
<FTC: Main unit>
Each sub unit is controlled by the main unit.
(a) The outdoor units must NOT be connected to the main unit.
Make sure that the main unit is powered by independent source.
(b) Wire the main remote controller to TBI.6 1-2 on the main unit.
(c) Wire the electric heater to the main unit.
<FTC: Sub unit>
The hydrobox or PAC-SIF051B-E or main unit is used as a sub unit
(a) Connect each outdoor unit to a sub unit.
(b) The main remote controller must NOT be wired to a sub unit.
9.2 Pipe work
Following is the system example of two outdoor units being connected in one system.
IMPORTANT NOTE
Keep the minimum amount of water required in the space heating circuit according to the number of outdoor units.
No. Component
Wiring
Main
Sub 1
Sub 2
1 Booster heater (local supply)
2 Circulation pump1 (local supply)
3 Flow switch1 (local supply) *2
4 Flow temp. thermistor (THW1)
5 Return temp. thermistor (THW2)
6 Sub1 circulation pump1 (local supply)
7
Sub1 flow switch (local supply) *2
8
Sub1 flow temp. thermistor (THW1)
9 Sub1 return temp. thermistor (THW2)
10 Sub1 ref. liquid temp. thermistor (TH2) *1
11 Sub2 circulation pump1 (local supply)
12
Sub2 flow switch (local supply) *2
13
Sub2 flow temp. thermistor (THW1)
14 Sub2 return temp. hermistor (THW2)
15 Sub2 ref. liquid temp. thermistor (TH2) *1
System 1: Heating/Cooling system
• Install a low loss header (local supply).
• Install booster heater toward the local system, relative to the low loss header.
*1 When the outdoor unit is split type, TH2 needs to be installed. <Fig. 9.2.1>
*2 For safety protection, it is recommended to install a flow switch.
4
8
9
5
6
2
1
7
13
15
14
11
12
3
10
en
9. Multiple outdoor units control
9.1 Wiring for multiple outdoor units control
To establish a larger system, up to 6 outdoor units of the same model can be con-
nected in one system.
Note:
▪
SUZ-SWM outdoor unit can not be connected.
▪
PUZ-(H)WM outdoor unit can not be connected to PAC-SIF051B-E.
▪
Flow sensor is necessary for PUZ-(H)WM outdoor unit.
▪
PUZ-(H)WM outdoor unit DIP switch settings changed to SW5-5 ON.
Max. 6 units
Outdoor unit
Sub
Hydrobox
Hydrobox
FTC
(Main)
Main
Max. 6 units
FTC
(Main)
Main
Main remote
controller
FTC (Sub)
Sub
FTC (Sub)
Outdoor unit
Outdoor unit
Outdoor unit
Flow temp. thermistor
Return temp. thermistor
Flow temp.
thermistor
Return temp.
thermistor
Outdoor unit (Packaged type)
Outdoor unit (Split type)
<Fig. 9.2.1>
Ref. liquid
temp.
thermistor
(TH2)
*1
*1 Refrigerant-water HEX
*1 Refrigerant-water HEX
*1
Low loss header
(local supply)
Heating/
Cooling
<Fig. 9.2.2>
Main remote
controller
Summary of Contents for PAC-SIF051B-E
Page 62: ......
