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(2) Power supply of 30V DC from outdoor unit connector TB7.
As shown on Fig. 9-2, GB-24A receives power supply of 30V DC from R410A CITY MULTI outdoor unit
connector TB7.
If one of the outdoor units should change its power supply switch CN41 to CN40.
*NOTE: This method applies to R410A CITY MULTI outdoor unit except PUMY (S series).
Centralized controller
GB-24A
(3) Power supply of 30V DC from outdoor unit connector TB3.
GB-24A can also receive power supply from R410A/R407C/R22 outdoor unit connector TB3. However, if the
outdoor unit shuts down, GB-24A will also automatically shut down. Therefore, this system is not recommended
for air conditioning system with multiple outdoor units.
Centralized controller
GB-24A
R410A CITY MULTI
Outdoor unit
TB7 TB3
Centralized control
transmission line
CN41 CN40
Outdoor unit
TB7 TB3
CN41
Fig. 9-2 GB-24A, TB7 system.
Outdoor unit
TB7
TB3
CN41
Fig. 9-3 GB-24A, TB3 system.
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Indoor unit
Indoor/outdoor transmission line
ME remote
controller
Indoor unit
Indoor/outdoor transmission line
ME remote
controller
Indoor unit
Indoor/outdoor transmission line
ME remote
controller
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