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[Fig. 9.4.2] (P.5)
A Liquid pipe
B Gas pipe
D Finishing tape
E Insulator
[Fig. 9.4.3] (P.5)
Penetrations
[Fig. 9.4.4] (P.5)
<A> Inner wall (concealed)
<C> Outer wall (exposed)
<E> Roof pipe shaft
<F> Penetrating portion on fire limit and boundary wall
A Sleeve
C Lagging
E Band
G Sleeve with edge
I Mortar or other incombustible caulking
J Incombustible heat insulation material
10. Wiring
10.1. Caution
1 Follow ordinance of your governmental organization for technical standard re-
lated 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 heat source unit.
4 Give some allowance to wiring for electrical part box of indoor and heat source
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 be burnt 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 trans-
mitting and receiving will cause erroneous operations.
7 Only the transmission line specified should be connected to the terminal block
for heat source unit transmission.
(Transmission line to be connected with indoor unit : Terminal block TB3 for
transmission line, Other : Terminal block TB7 for centralized control)
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 heat source units.
Connect this control line between the terminal blocks for centralized control.
(2-wire line with no polarity)
When conducting group operation in different refrigerant systems without con-
necting to the upper class controller, replace the insertion of the short circuit
connector from CN41 of one heat source unit to CN40.
9 Group is set by operating the remote controller.
10.2. Control box and connecting position of
wiring
<Wiring compressor unit, Indoor unit>
1. The controller box for the indoor unit wiring is on the compressor unit.
2. Connect the indoor unit transmission line to transmission terminal block (TB3),
or connect the wiring between heat source units or the wiring with the central
control system to the central control terminal block (TB7).
When using shielded wiring, connect shield ground of the indoor unit transmis-
sion line to the earth screw (
) and connect shield ground of the line between
heat source units and the central control system transmission line to the shield
(S) terminal of the central control terminal block (TB7) shield (S) terminal. In
addition, in the case of heat source units whose power supply connector CN41
has been replaced by CN40, the shield terminal (S) of terminal block (TB7) of
the central control system should also be connected to the earth screw (
Fix the wiring securely in place with the cable strap at the bottom of the termi-
nal block so that the external force if not applied to the terminal block. External
force applied to the terminal block may damage the block and short-circuit,
ground fault, or fire may result.
[Fig. 10.2.1] (P.6)
A Power source
C Earth screw
C Electric wire
<B> Outer wall
<D> Floor (waterproofing)
B Heat insulating material
D Caulking material
F Waterproofing laye
H Lagging material
).
B Transmission line
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 materi-
als 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:
Thickness
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.
3. Conduit mounting plates (ø27) are being provided. Pass the power supply and
transmission wires through the appropriate knock-out holes, then remove the
knock-out piece from the bottom of the terminal box and connect the wires.
4. Fix power source wiring to terminal box by using buffer bushing for tensile
force (PG connection or the like).
5. Narrow the opening by using a conduit to keep small animals out.
6. Use the terminal block for pump interlock (TB8) when interlocking the unit with
the pump in the water circuit.
In this case, be sure to remove the short circuit wire on the terminal block for
pump interlocking (TB8).
Run the cable to TB8 via the same route as the power supply line.
<Heat exchanger unit – compressor unit connection>
1. Connect the connectors on the compressor unit and the heat exchanger unit
using the wires installed on the compressor unit (External heater adapter).
2. The top service panel can be removed by removing the three screws at the
top, tilting the panel by pulling the top of it away from the unit body, and pulling
it up.
3. The bottom service panel can be removed by first removing the top service
panel, then removing the 3 screws at the top, tilting the panel by pulling the top
of it away from the unit body, and pulling it up.
4. Wire the units as shown in the figure below.
Run the power supply line [0.75 mm
and at least 5 cm away from each other.
Keep them out of contact with the pipes.
Connect the heat exchanger unit and the compressor unit via 3 of the 4 con-
nectors on each unit.
[Fig. 10.2.2] (P.6)
A Heat exchanger unit
C Cable clamp (power supply line)
E Control cable
<A> Enlarged view of connector section
<B> Heat exchanger unit side
<C> Compressor unit side
<D> CN102B (For power supply line)
<E> CN103B (For control line)
<F> CN101B (For power supply line)
<G>CN102A (For power supply line)
<H> CN103A (For control line)
<I> CN101A (For power supply line)
<J> CN104B (For control line)
<K> CN104A (For control line)
5. The length of standard equipped wiring, not including the heat exchanger unit's
and the compressor unit's internal wiring, is approximately 1.5 m.
If longer wiring is required, use optional extension wire for water heat source
(Available in 5 m and 10 m, not including the unit's internal wiring).
6. Clamp excess power supply line [0.75 mm
rately with the cable clamps on the compressor unit's side panel.
Choose the appropriate size cable clamps for the amount of excess wiring.
[Fig. 10.2.3] (P.6)
<A> Compressor unit
A Cable clamp for power supply cable
B Cable clamp for control cable
Pipe size
ø6.35 ~ 25.4 mm
ø28.58 ~ 38.1 mm
10 mm min.
15 mm min.
100 °C min.
2
2
] and control line [0.3 mm
] separately
B Compressor unit
D Cable clamp (control line)
F Power supply cable
2
] and control line [0.3 mm
2
] sepa-
15
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