UPDATED A5 Panasonic technical handbook F 2025 - Flipbook - Page 113
ECOi 2 & 3 Pipe U1/U2 Control Wiring
System Header unit is the
one that has U1/U2 connected to it
System 1
System 2
HEADER
HEADER
Earth the
Screen at the
outdoor unit
Earth the
Screen at the
outdoor unit
Header outdoor / indoor units
Header outdoor
to indoor units
Header outdoor / indoor units
U1 / U2
To indoor
U1 / U2
To indoor
Cable type : 2 Core, screened, twisted, non-polarised.
Cable size : 0.75mm² up to 1000m, 2.0mm² up to 2000m.
§ Connect screens throughout and earth at the outdoor unit.
§ No more than 3 cables in any one terminal.
§ Do not create a ring with the control wiring.
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