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Penetrations
[Fig. 10.4.4] (P.8)
<A> Inner wall (concealed)
<C> Outer wall (exposed)
<E> Roof pipe shaft
<F> Penetrating portion on fire limit and boundary wall
Sleeve
A
Lagging
C
Band
E
Sleeve with edge
G
Mortar or other incombustible caulking
I
Incombustible heat insulation material
J
11. Wiring (For details, refer to the installation manual of each unit and controller.)
11.1. Caution
1 Follow ordinance of your governmental organization for technical standard
related to electrical equipment, wiring regulations and guidance of each
electric power company.
2 Wiring for control (hereinafter referred to as transmission line) shall be
(5 cm or more) apart from power source wiring so that it is not influenced by
electric noise from power source wiring (Do not insert transmission line and
power source wire in the same conduit).
3 Be sure to provide designated grounding work to the outdoor unit.
4 Give some allowance to wiring for electrical part box of indoor and outdoor
units, because the box is sometimes removed at the time of service work.
5 Never connect the main power source to terminal block of transmission line.
If connected, electrical parts will burn out.
6 Use 2-core shield cable for transmission line. If transmission lines of different
systems are wired with the same multiplecore cable, the resultant poor
transmitting and receiving will cause erroneous operations.
7 Only the transmission line specified should be connected to the terminal
block for outdoor unit transmission.
Erroneous connection does not allow the system to operate.
8 In the case of connecting with an upper class controller or to conduct group
operation in different refrigerant systems, the control line for transmission is
required between the outdoor units in different refrigerant systems.
Connect this control line between the terminal blocks for centralized control
(2-wire line with no polarity).
9 Group is set by operating the remote controller.
11.2. Control box and connecting position
of wiring
1 Outdoor unit
1. Remove the front panel of the control box by removing the 4 screws and
pushing it up a little before pulling it out.
2. Connect the indoor - outdoor transmission line to the terminal block (TB3) for
the indoor - outdoor transmission line.
If multiple outdoor units are connected in the same refrigerant system, daisy-
chain TB3 (M1, M2,
Terminal) on the outdoor units. Connect the indoor -
outdoor transmission line for the outdoor units to TB3 (M1, M2,
of only one of the outdoor units.
3. Connect the transmission lines for centralized control (between the
centralized control system and the outdoor unit of different refrigerant
systems) to the terminal block for centralized control (TB7). If the multiple
outdoor units are connected to the same refrigerant system, daisy-chain TB7
(M1, M2, S Terminal) on the outdoor units in the same refrigerant system.
(*1)
*1: If TB7 on the outdoor unit in the same refrigerant system is not daisy-
chained, connect the transmission line for centralized control to TB7 on
the OC (*2). If the OC is out of order, or if the centralized control is being
conducted during the power supply shut-off, daisy-chain TB7 on the OC,
OS1, and OS2 (In the case that the outdoor unit whose power supply
connector 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).
*2: OC, OS1, and OS2 of the outdoor units in the same refrigerant system
are automatically identified. They are identified as OC, OS1, and OS2 in
descending order of capacity (If the capacity is the same, they will be in
ascending order of their address number).
<B> Outer wall
<D> Floor (waterproofing)
Heat insulating material
B
Caulking material
D
Waterproofing layer
F
Lagging material
H
Terminal)
When filling a gap with mortar, cover the penetration part with steel plate so
that the insulation material will not be caved in. For this part, use incombustible
mate rials for both insulation and covering. (Vinyl covering should not be used.)
•
Insulation materials for the pipes to be added on site must meet the following
specifications:
ø6.35 to 25.4 mm
Thickness
10 mm min.
Temperature Resistance
*
Installation of pipes in a high-temperature high-humidity environment, such
as the top floor of a building, may require the use of insulation materials
thicker than the ones specified in the chart above.
*
When certain specifications presented by the client must be met, ensure that
they also meet the specifications on the chart above.
4. In the case of indoor-outdoor transmission line, connect the shield ground to
the grounding terminal (
). In the case of transmission lines for centralized
control, connect it to the shield terminal (S) on the terminal block for
centralized control (TB7). Furthermore, in the case of the outdoor units
whose power supply connector CN41 is replaced with CN40, short circuit the
shield terminal (S) and the grounding terminal (
5. Fix the connected wires securely in place with the cable strap at the bottom
of the terminal block. External force applied to the terminal block may
damage it resulting in a short circuit, ground fault, or a fire.
[Fig. 11.2.1] (P.9)
A Power source
C Earth screw
[Fig. 11.2.2] (P.9)
A Cable strap
C Transmission line
2 Conduit tube installation
•
Open by hammering the knockout holes for the conduit tube located on the
base and the bottom part of the front panel.
•
When installing the conduit tube directly through the knockout holes, remove
the burr and protect the tube with masking tape.
•
Use the conduit tube to narrow down the opening if there is a possibility of
small animals entering the unit.
•
When taking the conduit tube out from the bottom part of the unit, caulk
around the tube opening to prevent water penetration.
11.3. Wiring transmission cables
1 Types of control cables
1. Wiring transmission cables
•
Types of transmission cables: Shielding wire CVVS, CPEVS or MVVS
•
Cable diameter: More than 1.25 mm
•
Maximum wiring length: Within 200 m
•
Maximum length of transmission lines for centralized control and indoor/
outdoor transmission lines (Maximum length via outdoor units): 500 m MAX
The maximum length of the wiring between power supply unit for
transmission lines (on the transmission lines for centralized control) and
each outdoor unit and system controller is 200 m.
2. Remote control cables
•
ME Remote Controller
Kind of remote control cable
Sheathed 2-core cable (unshielded) CVV
Cable diameter
0.3 to 1.25 mm
When 10 m is exceeded, use cable with
Remarks
the same specifications as 1. Wiring
transmission cables.
•
MA Remote Controller
Kind of remote control cable
Sheathed 2-core cable (unshielded) CVV
Cable diameter
0.3 to 1.25 mm
Remarks
Within 200 m
*
Connected with simple remote controller.
Pipe size
ø28.58 to 41.28 mm
15 mm min.
100°C min.
) in addition to the above.
B Transmission line
B Power source line
D Pillar
2
(0.75 to 1.25 mm
)*
2
2
(0.75 to 1.25 mm
)*
2
2
19
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