Haier MRV II Bedienungsanleitung

Haier MRVⅡAir Conditioning

Haier MRVⅡcan be used in a large combination

with multiple outdoor units, it is only one system

and is the second generation of Haier C-MRV

product. Major features are energy saving,

intelligent control and precise temperature control,

for R410A system, that is more friendly for

environment as well.

To regulate the installation, commissioning and

maintenance procedure, and ensure the working

quality, also to improve the working efficiency, we

make this guide for reference.

This regulation is applicable for Haier A/C Elec.

Corp. Ltd.

Index

Part 1 Installation regulation------------------------------------------3

Part 2 Commissioning & Maintenance for R22 system---- 22

Part 3 Debugging & Maintenance for R410Asystem--------85

Part 4 Wiring diagram------------------------------------------------136

Part 1 Installation regulation

1. Installation flowchart-------------------------------------------------------4

2. Equipment delivery---------------------------------------------------------5

3. Outdoor installation--------------------------------------------------------6

4. Indoor installation----------------------------------------------------------8

5. Piping work------------------------------------------------------------------12

6. Water drainage pipe installation--------------------------------------14

7. Insulation treatment------------------------------------------------------15

8. Electric wiring--------------------------------------------------------------16

9. Pipe cleaning work--------------------------------------------------------18

10. Leakage test---------------------------------------------------------------19

11. Evacuation-----------------------------------------------------------------20

12. Additional Refrigerant Charging------------------------------------21

13. Trial operation-------------------------------------------------------------22

14. Transfer to user-----------------------------------------------------------23

- 3 -

Part 1

1 Installation flowchart

Take training for the user

Every unit should run normally

Recharge the refrigerant due to

the actual pipe length and the

size

Vacuum should be below 75

mmHg

Keep the pressure at 28kgf/cm

for 24 hours

Keep clean in the pipe

Select the proper cable and wire

It should be done for the whole

piping system

After installation

15. Transfer to the user

14. Debugging and trial running

13. Additional refrigerant charging

12. Evacuation

11. Leakage testing

10. Cleaning operation

9. Electric installation

8. Heat insulation

Pay attention to the gradient

Keep dry, clean and hermetic

Prevent the ventilation in short

circuit. Easy for maintenance

Confirm the model to avoid the

mis-installation

Confirm the person responsible

for each process

Prepare the material,equipment

and worker's training

Confirm the selected model,

position, pipe size, layout direction

Important points

in installation

7. Condensate water drainage

6. Refrigerant pipe layout

5. Outdoor installation

4. Indoor installation

3. Working distribution

2. Working preparation

1.Engineering drawing

before installation

Process

- 4 -

Part 1

2 Equipment delivery

2.1 After the equipment is delivered to the site, all relative persons should

join the unpacking and checking work.

2.2 Pay attention to the below points when unpacking:

a. Check the equipment name, model, specification and the quantity, etc.

b. Suspend the equipment to the site or near the site before unpacking

the unit. Forbidden to suspend the unit after unpacking to avoid being

damaged.

c. When unpacking, do not operate wildly to avoid being damaged.

d. Check if the accessories are complete due to the packing list after

unpacking. Any question, contact the after-sale persons.

- 5 -

Part 1

3 Outdoor installation

3.1 The unit should be placed far away the flammable, explosive or oily

place.

3.2 The noise and the outlet air should not affect the neighbors.

- 6 -

3.3 There should be enough space for air inlet, air outlet and

maintenance around the unit. Fluent ventilation and good heat release. If

there is obstacle above the unit, it must be over 2m away from the air

outlet, or there should be extended duct.

3.4 The floor and the steel bracket should be strong enough to afford the

1.5 times heavier than the unit running weight. The floor and the steel

bracket should be horizontal.

Part 1

3.5 The bottom of steel bracket should be made from 6# channel steel.

3.6 The floor should be over 100mm higher than the ground, and there

should be the drainage around to ensure the unit not being immersed in

the water.

3.7. The unit should be fixed firmly with the anti-vibration cushion.

3.8. The outdoor should be as near the indoor as possible. Shorten the

pipe and decrease the bend pipe. Pipe length can not exceed the

permitted range.

3.9 Avoid the dangerous place which could be easily damaged by

monsoon, typhoon and earthquake, if possible, do not install the unit in

the air.

- 7 -

Part 1

4 Indoor installation

A. With the shortest refrigerant pipe, and convenient to connect with

distributing pipe and water pipe. Water pipe should keep a 1% gradient

at least.

B. The place for indoor unit installation should be strong enough to

afford the unit weight and running shake.

C. Preset a checking hole near the indoor unit, and there should be

enough space for maintenance, and convenient to maintain or change

the PCB and motor.

D. Ensure air return and air discharging fluent, and prevent ventilation

in short circuit , also air return duct and air outlet duct is necessary.

E. Before installation, please check if the unit appearance has been

damaged or the other abnormal after being unpacked. Also please check

if the accessories are complete, and the accessories should be

transferred to the special person for proper preservation.

F. The unit should be fixed firmly to avoid falling and shaking. After

installing the indoor unit, please check it with a gradienter to ensure the

indoor unit is horizontal.

- 8 -

Part 1

4.1 Wall mounted unit installation

installation figure:

mounting plate

gas pipe

liquid pipe

indoor side outdoor side

through-wall hole

wall thickness

through-wall hole section

adhesive tape

fresh air pipe

heat insulation

4.1.1 Fix the mounting plate, set the through-wall hole: install the unit on

smooth wall beside beam and pillar. Firstly , fix the mounting plate on the

wall with a steel nail ,use a thread with a screw ,drop it down vertically

from the central top of the mounting plate,(or you can use a gradienter)to

find the horizontal place and fix it. Drill holes in the wall according to the

wall mounting plate’s position , put plastic sleeve into the hole, then

fasten the plate securely with 4*25 screw .

4.1.2 Make through-wall hole : make a throughout hole in the wall , after

installation , please seal it with putty or gesso.

4.1.3 Hang the unit body onto the upper notches of the mounting

plate ,move the body from side to verify its secure fixing.

- 9 -

Part 1

4.2 Cassette unit installation

air outlet air outlet

air inlet

4.2.1 To ensure the air conditioner working effect, the installation height

should be less than 3m.

4.2.2 After installation on the ceiling ,check the unit’s horizontal level ,use

a gradienter to check it.

4.2.3 Set a checking hole bigger than 400*400mm for checking and

maintenance .

4.3 ESP duct unit installation

Ceiling

Air return

Building roof

Air return box

Air supply duct Unit

Air outlet

grille

Air supply

Unit

Air return

Air return box

- 10 -

Part 1

4.3.1 The indoor unit can be installed on the ceiling, which height is no

more than 3m.

4.3.2 Install the unit with suspending pole, check if the installation place

can bear the unit.

4.3.3 Fix the indoor unit to the suspending bolt, if necessary, it is possible

to suspending the unit to the beam, etc.

4.3.4 Adjust the horizon with a gradienter or by the following method.

Make adjustment so that the relation between the lower surface of the

unit and water level in the hose becomes what is shown in the figure.

PVC pipe

0~5 mm

(0~0.2")

Piping side

Water level

make the piping side slightly lower.

Supply water

4.3.5 Notice for high static pressure duct unit

4.3.5.1 In order to reduce the noise level of the working room , it is better

not to install indoor unit in the working room ,especially for the room

where need a strict noise level. Indoor unit can be installed in a special

room or stair well, and connect with working room by air sending duct and

air return duct.

4.3.5.2 High static pressure duct unit is designed for duct type air

- 11 -

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