Mitsubishi Electric Central Controller GB-50A User manual

Mitsubishi Electric Air-conditioner Network System

Central Controller

Model: GB-50A Installation Manual

Contents

Before using the controller, please read this Installation Manual carefully to ensure correct

operation. Store this Installation Manual in a location that is easy to find.

1. Safety Precautions to be Observed without Fail ..........1

2. Confirmation of Parts .................................................3

3. Product Feature.........................................................4

4. System Diagram ........................................................5

5. Installation Method ....................................................7

1. Part prepared at site ..............................................7

2. Allowable length of M-NET transmission lines.........7

3. Installation method ................................................8

6. Wiring Method .........................................................11

1. Grounding cable. .................................................11

2. Cover removal and installation .............................11

3. M-NET transmission line ......................................12

4. LAN connection ...................................................12

7. Initial setting............................................................13

1. How to set the IP address with dip switches .........14

2. Setting of the service switch.................................14

8. Test Run .................................................................15

1. Collective operation ON/OFF ...............................15

2. Service LED display.............................................15

9. Example for System Configuration............................16

1. To control a K control model ................................16

2. To use system controllers on multiple units ..........16

10. External Input/Output Usage Method ......................16

1. External signal input function ...............................16

2. External signal output function .............................18

This manual describes the installation of the central controller and wiring to the air conditioner. Refer to the

installation manual of the air conditioner. Carefully read item “1 Safety precautions to be observed without fail”

before installing the unit.

* Hazards and levels of danger that can occur due to incorrect handling are classified by the following symbols.

WARNING Incorrect handling can result in death, serious injury, etc.

CAUTION Incorrect handling can result in injury or damage to the building or its contents.

* After reading this manual, keep in a handy place. When removing or repairing the unit, give this manual to the

installer. When the user changes, also give to the new user.

WARNING

CAUTION

Do not install the controller in a place

where flammable gas could leak.

If gas leaks and collects around the unit, it

may cause a fire or explosion.

Do not install this controller in a place

where the ambient temperature exceeds

40ºC (104ºF) or drops below 0ºC (32ºF),

also do not install in a place where it is

exposed to direct sunlight.

It may cause a deformation or malfunction.

Do not use this controller in an

abnormal environment.

If the controller is used in a place where there is

much oil (including machine oil), steam o

sulfide gas, the performance of the controlle

may deteriorate or parts may be damaged.

Ask your dealer or technical

representative to install.

If incorrect installation is done by a customer, it

may cause an electric shock, fire, etc.

Securely install the controller according

to the installation manual.

If installation is not correct, it may cause an

electric shock, fire, etc.

Securely install in a place which can

withstand the weight of the controller.

If it is not enough, the unit may fall and

cause an injury.

The electric work should be perform by

authorized personal according to the

installation manual.

ny lack of electric circuit or any deficiency

caused by installation may result in an

electric shock or fire.

Securely connect the wiring using the

specified cables and fix them so that the

stress from the cables is not applied to

the terminal connection sections.

If connection or fixing is not reliably

connected, it may cause heat generation, a

fire, etc.

Do not move and re-install the unit by

yourself.

If installation is not correct, it may cause an

electric shock, fire, etc.

our dealer or technical re

resentative.

Never modify or repair by yourself.

If the controller is modified or a repair is not

correct, it may cause an electric shock, fire,

etc.

Consult your dealer if repairs are necessary.

Do not install this controller in a place

where steam is generated such as

bathroom, kitchen, etc.

Avoid placing where water condenses on

the walls. It may cause an electric shock or

malfunction.

1 Safety Precautions to be Observed without Fail

This appliance must be earthed (grounded).

Make sure to install a protect earth(PE)/grounding line .

Do not connect the PE (grounding) line to gas or water

pipes, lightning conductors or telephone grounding lines.

Improper grounding may cause an electric shock.

CAUTION

Do not touch the PCB (Printed Circuit

Board) with your hand or a tool. Also do

not get dirt on the PCB.

It may cause a fire or malfunction.

Do not touch the switches with wet hands.

It may cause an electric shock or

malfunction.

Do not press the switches with sharp

objects.

It may cause an electric shock or

malfunction.

Do not connect an AC power source to the

M-NET terminal blocks of this device.

It may cause a breakdown or fire.

Use specified wires corresponding to

the current capacity for wiring.

Otherwise it may cause power leakage, heat

generation or fire.

Perform wiring so the tension is not

applied.

If tension is applied, it may cause

disconnection, heat generation or a fire.

Do not wash this controller with water.

It may cause an electric shock or

malfunction.

Do not install this controller in a place

where an acid or alkaline solution,

special spray, etc. is used frequently.

It may cause an electric shock or

malfunction.

*Please confirm that in addition to this Installation Manual the following items are enclosed in the box.

No. Part name Qty.

1 Central controller 1

2 L-fitting 2

3 M3 (8mm (5/16in)) round head screw (for fixation of the fitting described in 2 above) 4

4 DIN rail attachment 2

5 M3 (6mm (1/4in)) round head screw (for fixation of the attachment described in 4 above) 8

6 Installation manual (this book) 1

7 Installation book 1

* The screws for installing to the control panel are not included. (M4 screws)

* In addition to the parts above, a power supply unit for transmission line, which supplies the power to the central controller

through the transmission line, must be purchased. When R410A, however, the power can be supplied also from the

R410A outdoor unit.

Unit that supplies the

power to GB-50A

The number of

connectable GB-50A Remarks

PAC-SC50KUA 2 units *1 ●When only one GB-50A unit is connected

Up to three other system controllers can be

connected to the transmission line for central

control

(Up to three ON/OFF remote controllers, up to six

system remote controllers, up to six schedule

timers, or up to six group remote controllers can

be connected.)

●When two GB-50A units are connected

No other system controllers can be connected.

R410A outdoor unit

(connected to the

transmission line for

central control)

1 unit Replace CN41 (power-supply switch connector) with

CN40 on only one outdoor unit.

Connectable number of indoor units will decrease by

4 units.

Outdoor unit other than

described above

(connected to

the indoor/outdoor

transmission line)

1 unit Connectable number of indoor units will decrease by

4 units.

*1: Cannot be connected to the different transmission line for central control in the different system.

* Use PAC-SC50KUA (power supply unit) when “Charge” function is used, or multiple outdoor units are connected. Connect

only the M-NET terminal (TB2) on PAC-SC50KUA to the M-NET terminal on GB-50A.

2 Confirmation of Parts

1. Specification

Item Contents

Interface M-NET :DC30V/24V;0.13/0.15A

External I/O :DC12V or 24V (External power supply)

Ethernet :10Base-T

Temperature Operating range 0 to 40ºC/ 32 to 104ºF

Storage range -20 to 60ºC/ -4 to 140ºF

Environmental condition

Humidity 30~90%RH (No condensation)

Dimensions 130(H) x 250(W) x 38 (D) mm/51/8(H) x97/8(W) x 11/2(D)in

Weight 1.1kg/21/2lb

Installation Environment In the control panel box (indoor)

*This unit is installed and used in a business office or equivalent environment.

2. Outline dimensions

Fig.3-1 Unit:mm(in)

L-fittings

Fig.3-2 Unit:mm(in)

38 (11/2)

250 (97/8)

3 Product Feature

Main body

POWER LAN LINK/ACT 1 2 3 4 5

(

25/32

)

(

25/64

)

(

25/32

)

130 (51/8)

Address setting method Address

Indoor unit Set the indoor unit you want to make them master unit in

the same group to the minimum address, and sequentially

set the indoor unit address in the same group.

1-50

Outdoor unit Min. indoor unit address in same refrigerant system + 50 51-100

BC controller/OS controller

* OS: Subsidiary Outdoor unit

Outdoor unit address in same refrigerant system + 1

However, for Sub-BC controller, minimum indoor unit

address that connects the local refrigerant piping + 50.

52-100

K control side remote controller Same address as indoor unit master unit 1-50

M-NET remote controller Set to the minimum indoor unit master address in the

same group + 100.

101-200

MA remote controller Address setting is unnecessary. -

OA processing unit/LOSSNAY After setting all the indoor units, set an arbitrary address. 1-50

K transmission converter Min. address of K control indoor unit + 200 201-250

4 System Diagram

PAR-20

21MAA

(

)

Note

●This diagram does not show

the AC power supply wiring.

Only the configuration for the

transmission line is shown.

* Address setting for each M-NET device (The address cannot be duplicated.)

* The K transmission converter (PAC-SC25KAA) and OA processing unit (LOSSNAY) are not included in

systems shipped to North America (USA & Canada).

NOTE

* This system controller is designed as a main controller, not as a sub controller.

●Main system controller (main SC)

The main system controller is designed to control all units including the units that other system

controllers control. When there is only one system controller in a system, it will become the main

system controller. Group setting or interlock setting can be made only with the main system controller.

●Sub system controller (sub SC)

The sub system controller is designed to have its control area to be controlled by the main

system controller.

Control area of main SC

Control area of sub SC Group This system controller is designed as a main controller,

so it cannot be controlled by a main SC (such as

Gateway).

Group Group

NOTE

* The following precautions will apply when using the K transmission converter (model: PAC-SC25KAA)

and controlling the M-NET model and K control model with the same controller.

Refer to the K transmission converter installation manual for details.

1) Central controller address

Always set the controller address to “00”.

(Refertosection .)

2) Central controller function selects

Always set the No.3 function selects of the controller to "ON".

(Refertosection .)

3) Indoor unit address

Set all M-NET model indoor units from the No.1 unit, and then set the K control model addresses.

Indoor unit No.1 unit – M-NET indoor unit max. address->K control indoor unit min. address – 50.

4) K control model group No.

The min. indoor address No. of that group becomes the group No. (Same for K control side local

remote controller.)

7 Initial settin

1. Parts prepared at site

Please prepare the following parts before installation of the unit.

Preparation parts Specification

Unit fixing screw M4 screw x 4pcs (when using L-fittings) *1

Protective earth cable

(Ground cable)

Use sheathed vinyl cord or wire.

Wire type : Wire should not be lighter than ordinary PVC sheathed flexible

cord IEC 60227

(designation 60227 IEC 53)

Wire size : 0.75mm2to 2mm2(AWG 18 to 14)

Wire color : The color combination green/yellow

Round terminal M4 screw size terminal (used for protective earth cable)

Transmission cable Type of the cable; Sheathed vinyl cords or cable which comply with the

following specifications or equivalent.

●CPEVΦ1.2mm to Φ1.6mm

●CVVS 1.25mm2to 2mm2(AWG 16 to 14)

*CPEV: PE insulated PVC jacketed shielded

communication cable

*CVVS: PVC insulated PVC jacketed shielded

control cable

PE: Polyethylene PVC: Polyvinyl chloride

*1: When installing DIN rail, prepare 35mm(1.38inch) DIN rail. Mounting screws for DIN rail must be

also procured separately.

Applicable DIN rail types (IEC 60715/DIN 60715): TH35-7.5Fe, TH35-7.5Al

2. Allowable length of M-NET transmission lines

●Maximum length of M-NET transmission =500m/1640 ft *1

●Maximum power feeding length =200m/656 ft *1

5 Installation Method

ℓ2

ℓ3

ℓ5

ℓ6

ℓ8

ℓ7

ℓ1

ℓ

NOTE

* 1: Not including the remote control cables up to 10m (32 ft) in length. If the remote control

cable exceeds 10m (32 ft), the excess must be added to the total length in order to avoid

exceeding the maximum length.

Outdoo

unit

Example

GB-50A

Powe

suppl

unit

Outdoor

Indoor Indoor

Indoor

Indoor Indoor

Indoor

IndoorIndoor

Remote controller

M-NET transmission line

(Centralized control line)

M-NET transmission line

(Indoor control line)

1) Maximum length of M-NET transmission

1 L2+L3+L4+ℓ1+ℓ2+ℓ3 (ℓ4) =500m/1640 ft

2 L2+L3+L4+ℓ1+ℓ5 =500m/1640 ft

3 L2+L3+L5+ℓ6+ℓ7 (ℓ8) =500m/1640 ft

4 ℓ3 (ℓ4)+ ℓ2+ℓ1+L4+L5+ℓ6+ℓ7 (ℓ8) =500m/1640 ft

5 ℓ5+ℓ1+L4+L5+ℓ6+ℓ7 (ℓ8) =500m/1640ft

2) Maximum power feeding length for the indoor control line

1 ℓ1+ℓ2+ℓ3 (ℓ4) =200m/656 ft

2 ℓ1+ℓ5 =200m/656 ft

3) Maximum power feeding length for the centralized control line

1 L1+L2 =200m/656 ft

2 L1+L3+L4 (L5) =200m/656 ft

3. Installation method

Central controller GB-50A is not waterproof.

Installation methods for the central controller GB-50A are shown below.

Method1: Horizontal installation using L-fittings

Attach two L-fittings to GB-50A using the supplied screws (Fig.5-1), then install GB-50A (Fig.5-2).

GB-50A shall be installed in a control panel box (steel: thickness 1mm (3/64 in) or more).

Please prepare the control panel box in consideration with installation space as shown in the Fig.5-2.

(Install in an area capable of withstanding a 1.1 kg (2 1/2 lb) load.)

Install GB-50A horizontally as shown in the Fig.5-2.

(Bothsides)

Fig.5-1 Fig.5-2 unit:mm(in)

Total of 4 screws 20

(

13/16

)

(

13/16

)

(

)

20 (13/16) *1

●L-fittings must be fixed at two points on the unit.

●The unit with L-fittings must be fixed at four points to prevent the unit from falling.

NOTE

If the remote control cable (ℓ4, ℓ8) do not exceed 10m (32 ft) in length, the length for ℓ4, ℓ8 may

not be considered to the total length.

CAUTION

NOTE(*1)

When connecting the protective earth cable after GB-50A is installed, leave some space for

mounting screws. When there is little space for mounting screws, connect the grounding wire before

GB-50A is installed.

290

(

11 13/32

)

Method2: Vertical installation using L-fittings

After removing the screws on GB-50A, attach two L-fittings to GB-50A using the supplied screws (Fig.5-3),

then install GB-50A (Fig.5-4).

GB-50A shall be installed in a control panel box (steel : thickness 1mm (3/64 in) or more).

Please prepare the control panel box in consideration with installation space as shown in the Fig.5.4.

(Install in an area capable of withstanding a 1.1 kg (2 1/2 lb) load.)

Install GB-50A vertically as shown in the Fig.5-4.

(Reference) When GB-50A is installed inside the control board, it is recommended that it be installed after

the wiring work, so that the installation becomes easy.

(Bothsides)

Fig.5-3

Fig.5-4 unit:mm(in)

Method3: Installation using DIN rail

GB-50A can be attached to DIN rail (35mm(1.38inch)).

Attach DIN rail attachment to GB-50A using the supplied screws (Fig.5-5), then install GB-50A (Fig.5-6).

GB-50A shall be installed in a control panel box (steel : thickness 1mm (3/64 in) or more).

Please prepare the control panel box in consideration with installation space as shown in the Fig.5-6.

(Install in an area capable of withstanding a 1.1 kg (2 1/2 lb) load.)

Install GB-50A vertically as shown in the Fig.5-6.

Fig.5-5 unit:mm(in)

(

13/16

)

(

3/16

)

(

13/16

)

(

13/16

)

Total of 8 screws

●L-fittings must be fixed at two points on the unit.

●The unit with L-fittings must be fixed at four points to prevent the unit from falling.

M3 (6(1/4))

M3 (8(5/16))

CAUTION

Left view Rear view

L-fitting

290 (11 13/32)

NOTE(*1)

When performing wiring

work after GB-50A is

installed, leave some space

for mounting screw.

Top

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