Mitsubishi Electronics R410A installation manual Control box and connecting position of wiring Fig

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6. Electrical work

L1 L2 GR

M1 M2 S M1 M2 S

CONDUIT PLATE : accessory

A TB3TB7

B

A : Power source

B : Transmission line

Fig. 6-1

6.2. Control box and connecting position of wiring (Fig. 6-1)

1.Connect the indoor unit transmission line to transmission terminal block (TB3), or connect the wiring between outdoor units or the wiring with the centralized con- trol system to the centralized 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 outdoor units and the central control system transmission line to the shield (S)

terminal of the centralized control terminal block (TB7) shield (S) terminal. In addition, in the case of outdoor units whose power supply connector CN41 has been replaced by CN40, the shield terminal (S) of terminal block (TB7) of the centralized control system should also be connected to the ground ().

2.Conduit mounting plates (ø27 [1-1/16 inch]) are being provided. Pass the power supply and transmission wires through the appropriate knock-out holes, then re- move the knock-out piece from the bottom of the terminal box and connect the wires.

3.Fix power source wiring to terminal box by using buffer bushing for tensile force (PG connection or the like).

6.3. Wiring transmission cables

1Types of control cables

1. Wiring transmission cables

•Types of transmission cables: Shielding wire CVVS or CPEVS

•Cable diameter: More than 1.25 mm2 [AWG16]

•Maximum wiring length: Within 200 m [656 ft]

2. M-NET Remote control cables

Kind of remote control cable

Shielding wire MVVS

Cable diameter

0.5 to 1.25 mm2 [AWG20 to AWG16]

 

When 10 m [32 ft] is exceeded, use cable with

Remarks

the same specifications as transmission line wir-

 

ing

3. MA Remote control cables

Kind of remote control cable

2-core cable (unshielded)

Cable diameter

0.3 mm2 (AWG22) to 1.25 mm2 (AWG16)

2Wiring examples

•Controller name, symbol and allowable number of controllers.

Name

Symbol

Allowable number of controllers

Outdoor unit controller

OC

 

Indoor unit controller

IC

One to eight controllers for one OC

 

RC

Maximum of 16 controllers for one

Remote controller

(M-NET)

OC

 

MA

Maximum of two per group

Example of a group operation system with multiple outdoor units (Shielding wires and address setting are necessary.)

<Examples of Transmission Cable Wiring>

■M-NET Remote Controller (Fig. 6-2)

■MA Remote Controller (Fig. 6-3)

<Wiring Method and Address Settings>

a.Always use shielded wire when making connections between the outdoor unit (OC) and the indoor unit (IC), as well for all OC-OC, and IC-IC wiring intervals.

b.Use feed wiring to connect terminals M1 and M2 and the ground terminal on the transmission cable terminal block (TB3) of each outdoor unit (OC) to terminals M1, M2 and terminal S on the transmission cable block of the indoor unit (IC).

c.Connect terminals 1 (M1) and 2 (M2) on the transmission cable terminal block of the indoor unit (IC) that has the most recent address within the same group to the terminal block on the remote controller (RC).

d.Connect together terminals M1, M2 and terminal S on the terminal block for central control (TB7) for the outdoor unit (OC).

e.The jumper connector CN41 on the control panel does not change.

f.Connect the terminal S on the terminal block for central control for the power supply unit to the ground terminal () in the electrical component box.

g.Set the address setting switch as follows.

Unit

Range

Setting Method

IC (Main)

01 to 50

Use the most recent address within the same group of indoor units

IC (Sub)

01 to 50

Use an address, other than that of the IC (Main) from among the units within the same group of indoor units. This must be

in sequence with the IC (Main)

 

 

Outdoor Unit

51 to 100

Use the most recent address of all the indoor units plus 50

* The address automatically becomes “100” if it is set as “01 - 50”.

 

 

M-NET R/C (Main)

101 to 150

Set at an IC (Main) address within the same group plus 100

M-NET R/C (Sub)

151 to 200

Set at an IC (Main) address within the same group plus 150

MA R/C

–

Unnecessary address setting (Necessary main/sub setting)

h. The group setting operations among the multiple indoor units is done by the remote controller (RC) after the electrical power has been turned on.

<Permissible Lengths>

1M-NET Remote controller

•Max length via outdoor units: L1+L2+L3+L4 and L1+L2+L3+L5 and L1+L2+L6+L7 = 500 m [1640 ft] (1.25 mm2 [AWG16] or more)

•Max transmission cable length: L1 and L3+L4 and L3+L5 and L6 and L2+L6 and L7 = 200 m [656 ft] (1.25 mm2 [AWG16] or more)

•Remote controller cable length: r1, r2, r2 +r3,r4 = 10 m [33 ft] (0.5 to 1.25 mm2 [AWG20 to AWG16])

If the length exceeds 10 m [33 ft], use a 1.25 mm2 [AWG16] shielded wire. The length of this section (L8) should be included in the calculation of the maximum length and overall length.

2MA Remote controller

•Max length via outdoor unit (M-NET cable): L1+L2+L3+L4 and L1+L2+L6+L7 = 500 m [1640 ft] (1.25 mm2 [AWG16] or more)

•

Max transmission cable length (M-NET cable): L1 and L3+L4 and L6 and L2+L6 and L7 = 200 m [656 ft] (1.25 mm2 [AWG16] or more)

•

Remote controller cable length:c1 and c1+c2 +c3 and c1+c2+c3+c4 = 200 m [656 ft] (0.3 to 1.25 mm2 [AWG20 to AWG16])

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Contents PUMY-P·NHMU -BS Contents Safety precautionsConfirmation of parts attached Installation location Ventilation and service space When installing a single outdoor unitWhen installing multiple outdoor units Installing the refrigerant piping Installing the outdoor unitPrecautions for devices that use R410A refrigerant Windy location installationConnecting pipes Fig Refrigerant pipe airtight testing method Refrigerant piping FigStop valve opening method Drainage piping work Electrical workAdditional refrigerant charge Wiring transmission cables Control box and connecting position of wiring FigWiring of main power supply and equipment capacity NET Remote Controller MA Remote ControllerSchematic Drawing of Wiring Example Fig Before test run Test runTest run Refrigerant collecting Pump downConfirmación de las piezas incluidas ContenidoMedidas de Seguridad Cuestiones previas a la instalaciónLugar de instalación Dimensiones exteriores Unidad exterior FigAntes de la instalación eléctrica Antes de realizar las pruebas de funcionamientoVentilación y espacio de servicio Cuando se instala una unidad exterior simpleCuando instale varias unidades exteriores Instalación de los tubos del refrigerante Instalación de la unidad exteriorInstalación en lugares expuestos al viento Instalación de la unidad exteriorTubos de conexión Fig Tubos de refrigerante Fig Prueba de fuga de gas del tubo de refrigeranteMétodo de abertura de la válvula de retención Trabajo eléctrico Tubería de drenajeCarga adicional de refrigerante CuidadoTendido de cables de transmisión Caja de control y posición de conexión de los ca- bles FigDibujo esquemático del cableado ejemplo Fig Controlador remoto M-NET Controlador remoto MAAntes de realizar las pruebas Prueba de funcionamientoPrueba de funcionamiento Recuperación de refrigerante vaciadoAvant l’installation déplacement Avant l’installationIndex Vérification des pièces livréesAvant l’installation électrique Emplacement d’installationDimensions extérieures Appareil extérieur Fig Avant la marche d’essaiVentilation et espace de service Lors de l’installation d’un seul appareil extérieurLors de l’installation de plusieurs appareils extérieurs Installation de la tuyauterie du réfrigérant Installation de l’appareil extérieurInstallation à un endroit exposé au vent Installation de l’appareil extérieurØ9,52 3/8 Ø15,88 5/8 C, d, e, f Mm inch Numéro de modèle Connexion des tuyaux FigCouple de serrage 100 120Mise en place des tuyaux de réfrigérant Fig Test d’étanchéité des tuyaux de réfrigérantComment ouvrir la vanne d’arrêt Mise en place du tuyau d’écoulement Installations électriquesCharge supplémentaire de réfrigérant PrécautionMise en place des câbles de transmission Schéma du câblage exemple Fig Commande à distance M-NET Commande à distance MAMarche d’essai Utilisation de la télécommandeMarche d’essai Récupération du réfrigérant AspirationBG79U872H02

R410A specifications

Mitsubishi Electronics R410A is a highly regarded refrigerant widely used in modern HVAC systems, particularly air conditioning units. This hydrofluorocarbon (HFC) refrigerant has gained popularity due to its environmental benefits and performance characteristics that meet the demands of contemporary cooling solutions.

One of the main features of R410A is its high energy efficiency. The refrigerant operates at a higher pressure compared to its predecessor, R22, which allows for smaller, more compact systems. This higher efficiency translates to lower energy consumption during operation, making R410A an environmentally friendly option that contributes to reducing greenhouse gas emissions. The energy savings not only benefit the environment but also reduce operational costs for end-users.

R410A also boasts excellent cooling capacity. Its thermodynamic properties enable effective heat exchange, making it suitable for various applications ranging from residential air conditioners to commercial chillers. The ability to maintain effective cooling performance even at high outdoor temperatures is a crucial characteristic, especially in warmer climates where high reliability is essential.

In terms of safety, R410A is classified as non-flammable and has a low toxicity level, making it a safer choice for use in both residential and commercial installations. It carries an ozone depletion potential (ODP) of zero, aligning with global efforts to phase out substances that deplete the ozone layer. As such, it complies with various international environmental regulations, ensuring that users are contributing to a sustainable future.

Mitsubishi Electronics integrates advanced technologies in their heating and cooling systems that utilize R410A. Features such as variable speed compressors and advanced control systems optimize performance, enhancing both comfort and energy efficiency. Additionally, the systems are designed to offer quiet operation, catering to users who prioritize noise reduction in their living or working environments.

In conclusion, Mitsubishi Electronics R410A refrigerant presents a combination of high energy efficiency, excellent cooling capacity, and safety attributes, solidifying its role as a vital component in contemporary HVAC technology. By utilizing R410A, Mitsubishi Electronics demonstrates its commitment to sustainability and performance, offering solutions that cater to the diverse needs of consumers while minimizing environmental impact.
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