Gree NCHS1D User manual

Owner's Manual

Original Instructions

Commercial Air Conditioners

GMV6 HR Mode Exchange Box

Models:

NCHS1D

NCHS2D

NCHS4D

NCHS8D

To Users

Thank you for selecting Gree’s product. Please read this instruction manual carefully before

installing and using the product, so as to master and correctly use the product. In order to guide you

to correctly install and use our product and achieve expected operating effect, we hereby instruct as

below:

(1) This appliance can be used by children aged from 8 years and above and persons with

reduced physical, sensory or mental capabilities or lack of experience and knowledge if they

have been given supervision or instruction concerning use of the appliance in a safe way

and understand the hazards involved. Children shall not play with the appliance. Cleaning

and user maintenance shall not be made by children without supervision.

(2) In order to ensure reliability of product, the product may consume some power under

stand-by status for maintaining normal communication of system and preheating refrigerant

and lubricant. If the product is not to be used for long, cut off the power supply; please

energize and preheat the unit in advance before reusing it.

(3) Please properly select the model according to actual using environment, otherwise it may

impact the using convenience.

(4) This product has gone through strict inspection and operational test before leaving the

factory. In order to avoid damage due to improper disassembly and inspection, which may

impact the normal operation of unit, please do not disassemble the unit by yourself. You can

contact with the special maintenance center of our company if necessary.

(5) When the product is faulted and cannot be operated, please contact with our maintenance

center as soon as possible by providing the following information.

1)Contents of nameplate of product (model, cooling/heating capacity, product No.,

ex-factory date).

2)Malfunction status (specify the situations before and after the error occurs).

(6) All the illustrations and information in the instruction manual are only for reference. In order

to make the product better, we will continuously conduct improvement and innovation. We

have the right to make necessary revision to the product from time to time due to the reason

of sales or production, and reserve the right to revise the contents without further notice.

(7) The final right to interpret for this instruction manual belongs to Gree Electric Appliances Inc.

of Zhuhai.

Exception Clauses

Manufacturer will bear no responsibilities when personal injury or property loss is caused by the

following reasons:

(1) Damage the product due to improper use or misuse of the product;

(2) Alter, change, maintain or use the product with other equipment without abiding by the

instruction manual of manufacturer;

(3) After verification, the defect of product is directly caused by corrosive gas;

(4) After verification, defects are due to improper operation during transportation of product;

(5) Operate, repair, maintain the unit without abiding by instruction manual or related

regulations;

(6) After verification, the problem or dispute is caused by the quality specification or

performance of parts and components that produced by other manufacturers;

(7) The damage is caused by natural calamities, bad using environment or force majeure.

Contents

1 Safety Notices (Please be Sure to Abide)·························································· 1

2 Product Introduction······················································································ 4

2.1 Names of Main Parts ························································································4

2.2 Parameter Table······························································································5

3 Preparation before Installation ········································································ 6

3.1 Standard Accessory ·························································································6

3.2 Installation Site································································································7

3.3 Selection Requirement for Communication Wire ·····················································7

3.4 Wiring Requirement ·························································································9

4 Installation Instruction ················································································· 10

4.1 Installation of Mode Exchange Box ···································································· 10

4.2 Pipe Connection···························································································· 15

4.3 Installation and Test for Drainage Hose······························································· 25

5 Cable Connection······················································································· 28

5.1 Connection of Cable and Terminal of Wiring Board················································ 29

5.2 Connect Power Cord ······················································································ 30

5.3 Connect Communication Wire of Indoor Unit and Outdoor Unit ································ 32

6 Routine Maintenance ·················································································· 33

6.1 Notice before Seasonal Use············································································· 34

6.2 Maintenance after Seasonal Use······································································· 34

7 Troubleshooting ························································································· 34

GMV6 HR Mode Exchange Box

1 Safety Notices (Please be Sure to Abide)

WARNING: If not abide strictly, it may cause severe damage to the unit or the people.

NOTICE: If not abide strictly, it may cause slight or medium damage to the unit or the

people.

This sign indicates that the operation must be prohibited. Improper operation may cause

severe damage or death to people.

This sign indicates that the items must be observed. Improper operation may cause

damage to people or property.

WARNING!

This Multi VRF System shall only be connected to an appliance suitable for the same

refrigerant.

All units in Manual Cover is a partial unit, complying with partial unit of IEC

60335-2-40:2018, and must only be connected to other units that have been confirmed

as complying to corresponding partial unit requirements of this international standard.

The electrical interface shall comply with electrical security requirement, voltage shall be

220-240V ~50/60Hz, current shall be referred to the table of “Dimension of power cord

and capacity of air switch” in Section 3.4, and safety class of construction is I.

The design pressure is 4.3 MPa. The thickness of pipe for installation should comply with

the relevant national/continental regulations.

Do not connect the indoor unit and hot water generator at the same time under the same

branch of the mode converter, otherwise the unit will be damaged.

After the power cord is installed, please note to ensure that the power cord should not

direct touch the sheet metal of electric box.

Please install the unit

according to instructions in

this manual. Read this

manual carefully before

starting up or checking the

machine.

Installation should be

performed by dealer or

qualified technicians. Do not

install the product by

yourself. Improper installation

may result in water leakage,

electric shock or fire hazard.

Make sure the local power

supply is in accordance with

units before installation, and

check the power supply

carefully.

This air conditioner must be

properly grounded through

the receptacle to avoid

electric shock. The grounding

wire shouldn't be connected

with gas pipe, water pipe,

lightning arrester or

telephone line.

GMV6 HR Mode Exchange Box

Please use specialized

accessories or parts to carry

out installation, or water

leakage, electric shock, fire

hazard may resulted.

R410A refrigerant can

produce poisonous gas once

it meets fire, so please

ventilate the room

immediately if refrigerant

leaks out during installation.

Diameter of power cord must

be large enough. Damaged

power cord and connecting

wire must be replaced by

specialized electric cable.

After the power cord is

connected, please install the

cover of electric box to avoid

danger.

Nitrogen must be charged

according to technical

requirements.

Short circuit is forbidden. Do

not cancel the pressure

switch in case the unit may

be damaged.

For units with wired

controller, do not connect

power supply until the wired

controller is well installed.

Otherwise, the wired

controller cannot be used.

When the installation is

finished, please check and

make sure the drain pipe,

pipeline and electric wire are

all well connected in order to

avoid water leakage,

refrigerant leakage, electric

shock or fire hazard.

Do not extend fingers or

objects into air outlet or air

return grille.

If you use gas heater or

petroleum heater in the same

room, please open the door

or window to maintain good

air circulation in case the

room may lack of oxygen.

Never start or stop the air

conditioner by inserting or

removing the power cord.

Do not turn off the air

conditioner until it runs for at

least 5 minutes. Otherwise,

oil-return of the compressor

will be affected.

Children are not allowed to

operate the air conditioner. Do not operate the air

conditioner with wet hands.

Please turn the unit off and

unplug your air conditioner

before cleaning. Otherwise, it

may cause electric shock or

personal injury.

Do not spray water on the air

conditioner or it will cause

malfunction or electric shock.

GMV6 HR Mode Exchange Box

Do not expose the air

conditioner directly to water

or place it in a damp or

corrosive environment.

Connect power supply 8

hours before operation. Do

not disconnect power if you

want to stop the unit in a

short period of time, e.g. in

one night (This is for

protecting the compressor).

Volatile liquid like thinner or

gasoline will damage the

appearance of air conditioner

Please use soft dry cloth or

wet cloth with mild detergent

to clean the outer case of air

conditioner.

During Cooling mode, indoor

temperature should not be

set too low. Keep the

difference between indoor

temp and outdoor temp within

5°C.

If abnormal condition occurs

(e.g. unpleasant smell),

please turn off the unit at

once and disconnect power

supply. Then contact GREE

service center. If the air

conditioner continues to

operate despite of abnormal

condition, the unit may be

damaged and it may cause

electric shock or fire hazard.)

Do not repair the air

conditioner by yourself.

Improper repair will cause

electric shock or fire hazard.

Please contact GREE service

center and have it repaired

by professional technicians.

Install units according to national wiring codes.

If the supply cord is damaged, it must be replaced by the manufacturer or its service agent or a similarly

qualified person in order to avoid a hazard.

An all-pole disconnection device which has at least 3mm clearances in all poles, and disconnection must be

incorporated in the fixed wiring in accordance with the wiring rules.

Gree Electric Appliances, Inc. of Zhuhai will not assume responsibility for any personal injury or property loss

caused by improper installation, improper debugging, unnecessary repair or not following the instructions of this

manual.

Any personal injury or property loss caused by improper installation, improper debug,

unnecessary repair or not following the instructions of this manual should not be the responsibility of

Gree Electric Appliances, Inc. of Zhuhai.

Correct Disposal of this product

This marking indicates that this product should not be disposed with other

household wastes throughout the

EU. To prevent possible harm to the

environment or human health from uncontrolled waste disposal, recycle it

responsibly to promote the sustainable reuse of material resources. To return

your used device, please use the return and collection systems or contact the

retailer where the product was purchased. They can take this product for

environmental safe recycling.

GMV6 HR Mode Exchange Box

2 Product Introduction

2.1 Names of Main Parts

One-to-one Mode Exchange Box:

Fig.2.1.1

One-to-two Mode Exchange Box:

Fig.2.1.2

One-to-four Mode Exchange Box:

Fig.2.1.3

GMV6 HR Mode Exchange Box

One-to-eight Mode Exchange Box:

Fig.2.1.4

2.2 Parameter Table

Model NCHS1D NCHS2D NCHS4D NCHS8D

Numbers of branches unit 1 2 4 8

Maximum numbers of

connectable IDUs

Per branch unit 8 8 8 8

Total unit 8 16 32 64

Maximum capacity of

connectable IDUs

Per branch kW 16 16 16 16

Total kW 16 28 45 85

Power supply 220-240V ~50/60Hz

Piping connections

ODU

Liquid mm Φ9.52 Φ9.52 Φ12.7 Φ15.9

High pressure

gas

mm Φ19.05 Φ19.05 Φ22.2 Φ22.2

Low pressure

gas

mm Φ22.2 Φ22.2 Φ28.6 Φ28.6

IDU Liquid mm Φ6.35/9.52 Φ6.35/9.52 Φ6.35/9.52 Φ6.35/9.52

Gas mm Φ12.7/15.9 Φ12.7/15.9 Φ12.7/15.9 Φ12.7/15.9

GMV6 HR Mode Exchange Box

3 Preparation before Installation

NOTE!

The product photos are only for reference. The unit for size is mm, except otherwise stated.

3.1 Standard Accessory

Please use below provided standard parts according to requirement.

No. Name Photo Quantity Purpose

1 M10×8

Nut with washer M10×8 4 Used for hanging mode

exchange box

2 Nut M10

(hexagon nut M10×8.4) 4 Used for hanging mode

exchange box

3 Washer 10

(spring washer M10×2.6) 4 Used for hanging mode

exchange box

4 Sponge of drainage pipe 2 Wrap the connection

position of drainage pipe

5 High-tenperature tieline 11

Wrap sponges at the

connection position

6 Installation template — 1

Used for drilling holes at the

ceiling

7 Silencer 1 1

The sizes of both nozzles

are IDΦ19.3mm and

Φ19.05mm，

nozzle Φ19 mm

is used for connecting the

high pressure gas pipe of

NCHS1D and NCHS2D.

8 Silencer 2 1

The sizes of both nozzles

are IDΦ22.6mm and

Φ22.2mm，nozzle Φ28mm

is used for connecting the

low pressure gas pipe of

NCHS1D and NCHS2D.

9 Silencer 1 1

The sizes of both nozzles

are IDΦ22.6mm and

Φ22.2mm，nozzle Φ22 mm

is used for connecting the

high pressure gas pipe of

NCHS4D and NCHS8D.

10 Silencer 2 1

The sizes of both nozzles

are IDΦ28.8mm and

Φ28.6mm，nozzle Φ28mm

is used for connecting the

low pressure gas pipe of

NCHS4D and NCHS8D.

11 Sealing cap 1 Used for blocking the low

pressure gas pipe nozzle

12 Damping block 1

Wrap the unused low

pressure gas pipe of

NCHS1D

The packed attachments should be subject to actual objects. If there are any alterations, there

will be no further notice.

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