Hitachi PC-ARF Technical Catalogue page 38

2 Control solutions
Great control possibilities
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Extension of the H-LINK line length
The maximum H-LINK electrical wiring length can be extended from 1,000 meters up to 5,000 meters by using four
PSC-5HR devices as a maximum. Each PSC-5HR device allows an extra H-LINK wiring length of 1,000 meters.
HITACHI control systems
H-LINK line 1
PSC-5HR
PSC-5HR
H-LINK line 2
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Multitenant installations
HITACHI offers the PC-AMTB control support for multitenant buildings (office buildings, multi dwelling, small hotels) with
several indoor units of different tenants with a common shared outdoor unit.
Thanks to the PC-AMTB, the power supply of some indoor units can be shut-down without causing refrigerant problems,
since the expansion valve of such indoor unit is controlled to adjust the refrigerant flow accordingly.
24 VAC / VDC
PC-AMTB is power supplied at 24 VDC or VAC from a power net independent from the tenant installation.
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TCGB0106 rev.0 - 12/2014
H-LINK line 2
H-LINK line 4
PC-AMTB
PC-AMTB
TENANT 1 TENANT 2
PSC-5HR
PSC-5HR
H-LINK line 5
PC-AMTB
TENANT 3
H-LINK line 3
H-LINK line 4
PC-AMTB
TENANT 4