GB-34
WT07828X01
Ⓐ
Ⓑ
Ⓒ
Ⓔ
Ⓓ
Ⓐ
Power cables, transmission cables
Ⓑ
Daisy-chain (transmission cables only)
Ⓒ
Terminal
blocks
(TB1,
TB3,
TB7)
Ⓓ
Make an alignment mark.
Ⓔ
Install the ring terminals back to back.
・
Connect the cables respectively to the power supply terminal block and the transmission terminal block. Erroneous connection does not allow
the system to operate.
・
Never connect the power cable to the transmission terminal block. If connected, electrical parts will be damaged.
・
When connecting cables to TB7, check that the voltage is 20 VDC or below.
・
Transmission cables should be (5 cm (2 in) or more) apart from the power cable so that it is not influenced by electric noise from the power
cable. (Do not put the transmission cables and the power cable in the same conduit.)
・
Follow the tightening torque for each screw type as shown below. Be careful not to use excessive torque as this could damage the screw.
Terminal block (TB1 (M6 screw)): 2.5–2.9 [N·m]
Terminal block (TB3, TB7 (M3.5 screw)): 0.82–1.0 [N·m]
・
When tightening the screws, do not push the driver strongly to avoid damaging the screw.
・
Make an alignment mark with a permanent marker across the screw head, washer, and terminal after tightening the screws.
①
Connect the indoor-outdoor transmission cable to TB3.
If multiple outdoor units are connected to the same refrigerant system, daisy-chain TB3 (M1, M2, ground) on the outdoor units. The indoor-
outdoor transmission cable to the indoor unit should be connected to TB3 (M1, M2, ground) of only one of the outdoor units. Connect the
shield to the ground terminal.
②
Connect the centralized control transmission cables (between the centralized control system and the outdoor units of different refrigerant systems) to TB7.
If multiple outdoor units are connected to the same refrigerant system, daisy-chain TB7 (M1, M2, S) on all outdoor units.*
1
Connect the shield
to the S terminal.
*1 If TB7 on the outdoor units in the same refrigerant system are not daisy-chained, connect the centralized control transmission cable to TB7 on the OC. If the OC is out of order, or if
centralized control is being conducted during a power supply shut-off, daisy-chain TB7 on the OC and OS. (In the case that the outdoor unit whose power jumper CN41 on the control
board has been replaced with CN40 is out of order or the power is shut-off, centralized control will not be conducted even when TB7 is daisy-chained.)
③
When a power supply unit is not connected to the centralized control transmission cable, move the power jumper from CN41 to CN40 on only
one of the outdoor units.
④
On the outdoor unit whose power jumper was moved from CN41 to CN40, short circuit the S terminal and the ground terminal.
⑤
Connect terminals M1 and M2 of the transmission terminal block on the indoor unit that has the lowest address in the group to the terminal
block on the remote controller.
⑥
When a system controller is connected, set SW5-1 on all outdoor units to ON.
⑦
Fix the cables securely in place with the cable strap below the terminal block.
10-6. Address setting
・
Set the address setting switch as follows.
Address setting method
Address
Indoor unit (Main, Sub)
Assign the lowest address to the main indoor unit in the group, and assign sequential addresses to the rest of the
indoor units in the same group.
* In an R2 system with a sub BC controller, make the settings for the indoor units in the following order. (Set the addresses
so that the addresses of
①
are smaller than those of
②
, and the addresses of
②
are smaller than those of
③
.)
①
Indoor units that are connected to the main BC controller or main HBC controller
②
Indoor units that are connected to sub BC controller 1
③
Indoor units that are connected to sub BC controller 2
01 to 50
Outdoor unit (OC, OS)
Assign sequential addresses to the outdoor units in the same refrigerant system.
* To set the address to 100, the address setting switch must be set to 50.
51 to 100
BC controller
HBC controller
Sub-HBC
Main
Assign an address that equals the address of the outdoor unit plus 1. If the address that is assigned to the main BC
controller or the main HBC controller overlaps any of the addresses that are assigned to the outdoor units or to the sub
BC controller or the Sub-HBC, use a different, unused address within the setting range.
* To set the address to 100, the address setting switch must be set to 50.
51 to 100
Sub
Assign an address that equals the lowest address of the indoor units that are connected to the sub BC controller or the
Sub-HBC plus 50.
* To set the address to 100, the address setting switch must be set to 50.
51 to 100
ME remote controller
Main
Assign an address that equals the address of the main indoor unit in the group plus 100.
101 to 150
Sub
Assign an address that equals the address of the main indoor unit in the group plus 150.
151 to 200
MA remote controller
Address setting is not required. (The Main/Sub setting is required.)
–
* The outdoor units in the same refrigerant circuit are automatically designated as OC and OS. The outdoor units are designated as OC and OS in the order of capacity from large to small (if two
or more units have the same capacity, in the order of address from small to large).
* Make indoor unit group settings from remote controllers after turning on the power to all units.
