Wiring Terminal Description
11
5.2 Indoor Unit Wiring
Power Supply
When the power cable is parallel to the signal wire, make sure
that they are enclosed in respective conduits and are kept a
reasonable wire spacing. (Distance between power cables:
less than 10A-300mm; less than 50A-500mm)
The three-core shielded cable is used as the signal cables of
the IDUs and ODU, and the shield layer must be grounded as
required.
The display box and build-out resistor are IDU accessories.
The remote controller, centralized controller and wired
controller are optional accessories. If necessary, contact the
local distributor for purchase. (Note: The BP3 series IDUs
provide standard remote controllers.)
CAUTION
Table 5-2
Fig. 5-3
Fig. 5-4
Circuit Breaker (A)
16
Refer to Table 5-3 for wire size
Indoor
Unit
Power
Phase
Voltage and Frequency
1-Phase
220-240V~ 50/60Hz
Indoor Unit /Outdoor Unit Signal
Wire (mm
2
) (Weak electric signal)
3-core shielded wire
3X0.75
Only the dedicated meter of Intensity can be used on the unit.
For the wiring method of the meter, please consult Intensity’s
professional service personnel.
CAUTION
Capacity (kBtu/h)
7~56
Power Wiring Size
X Y E P
Q
E
Communication
of IDUs
Centralized
controller
IDU
IDU
IDU
IDU
ODU
P Q E
P Q E
P Q E
Build-out resistor
Remote
controller
Wired controller
P Q E
P Q E X Y E
Please use the shielded wire, and the shield layer must be grounded.
Note: The wired controller and centralized controller in the dashed box are optional
accessories. If necessary, please contact the local distributor for purchase.
Suspend
Centralized
controller
X Y E
Only the last IDU
requires adding the
build-out resistor at
P and Q.
Nominal cross-sectional area (mm
2
)
>3
>6
>10
>16
>25
>32
>50
and
and
and
and
and
and
and
≤
3
≤
6
≤
10
≤
16
≤
25
≤
32
≤
50
≤
63
0.75
1
1.5
2.5
4
6
10
and
and
and
and
and
and
and
1
1.5
2.5
4
6
10
16
0.5 and
0.75
Flexible cords
Cable for fixed wiring
4
10
to
1.5
4
to
1
2.5
to
1
2.5
to
1
2.5
to
2.5
6
to
6
16
to
10
25
to
Rated current
of appliance(A)
Safety device requirements
2. Maximum allowable voltage range variation between phases is
2%.
3. Select circuit breaker that having a contact separation in all poles
not less than 3 mm providing full disconnection
，
where MFA is
used to select the current circuit breakers and residual current
operation breakers:
1. Select the wire diameters( minimum value) individually for each
unit based on the table 5-1 and table 5-3
，
where the MCA in
table 5-1 means Rated current in table 5-3. In case the MCA
exceeds 40A, the wire diameters should be selected according
to the table 5-3 is 6 to 16.
Table 5-3
Running
Timer Defrosting E-heat
Later
High
Running
Timer Defrosting E-heat
Running
Timer Defrosting E-heat
Running
Timer Defrosting E-heat
Later
High
Later
High
Later
High