Hitachi RAS-34FSN Bedienungsanleitung

Installation

Maintenance

Manual

INVERTER-DRIVEN

MULTI-SPLIT SYSTEM

HEAT PUMP

AIR CONDITIONERS

- SET-FREE FSN -

IMPORTANT:

READ AND UNDERSTAND

THIS MANUAL BEFORE

USING THIS HEAT-PUMP

AIR CONDITIONER.

KEEP THIS MANUAL FOR

FUTURE REFERENCE.

SET-FREE

Models:

Outdoor Units;

RAS-34FSN

RAS-36FSN

RAS-38FSN

RAS-40FSN

RAS-42FSN

P5414034

IMPORTANT NOTICE

GHITACHI pursues a policy of continuing improvement in design and performance of products. The right is

therefore reserved to vary specifications without notice.

GHITACHI cannot anticipate every possible circumstance that might involve a potential hazard.

GThis heat pump air conditioner is designed for standard air conditioning only. Do not use this heat pump

air conditioner for other purposes such as drying clothes, refrigerating foods or for any other cooling or

heating process.

GThe installer and system specialist shall secure safety against leakage according to local regulations or

standards. The following standards may be applicable, if local regulations are not available.

British Standard, BS4434 or Japan Standard, KHKS0010.

GNo part of this manual may be reproduced without written permission.

GSignal words (DANGER, WARNING and CAUTION) are used to identify levels of hazard seriousness.

Definitions for identifying hazard levels are provided below with their respective signal words.

:Immediate hazards which WILL result in severe personal injury

or death.

: Hazards or unsafe practices which COULD result in severe personal

injury or death.

:Hazards or unsafe practices which COULD result in minor personal injury

or product or property damage.

:Useful information for operation and/or maintenance.

GIt is assumed that this heat pump air conditioner will be operated and serviced by English speaking

people. If this is not the case, the customer should add safety, caution and operating signs in the native

language.

GIf you have any questions, contact your distributor or dealer of HITACHI.

GThis manual gives a common description and information for this heat pump air conditioner which you

operate as well as for other models.

GPerform installation work according to local codes and regulations.

GThis heat pump air conditioner has been designed for the following temperatures. Operate the heat pump

air conditioner within this range.

NOTE

Attention

This system has been designed for only cooling or heating operation.

Do not apply this system to the rooms where individual cooling and heating operation are required at

the same time. If applied, it will result in uncomfortable air conditioning due to big temperature changes

when the operation mode is changed.

This manual should be considered as a permanent part of the air conditioning equipment and should remain

with the air conditioning equipment.

Temperature (

Maximum Minimum

Cooling Indoor 32 DB/25 WB 21 DB/15 WB

Operation Outdoor 43 DB -5 DB

Heating Indoor 27 DB 15 DB

Operation Outdoor 15 WB -20 WB

DB: Dry Bulb, WB: Wet Bulb

CHECKING PRODUCT RECEIVED

GUpon receiving this product, inspect it for any shipping damage.

Claims for damage, either apparent or concealed, should be filed immediately with the shipping

company.

GCheck the model number, electrical characteristics (power supply, voltage and frequency) and

accessories to determine if they are correct.

The standard utilization of the unit shall be explained in these instructions.

Therefore, the utilization of the unit other than those indicated in these instructions is not recommended.

Please contact your local agent, as the occasion arises.

HITACHI’s liability shall not cover defects arising from the alteration performed by a customer without

HITACHI’s consent in a written form.

iii

TABLE OF CONTENTS

1. Safety Summary....................................................................................................................... 1

2. Structure................................................................................................................................... 2

2.1 Outdoor Unit & Refrigerant Cycle .................................................................................... 2

2.2 Necessary Tools and Instrument List for Installation ....................................................... 2

3. Transportation and Handling .................................................................................................... 3

3.1 Combination of Indoor Unit and Outdoor Unit ................................................................. 3

3.2 Transportation ................................................................................................................. 3

3.3 Handling of Outdoor Unit ................................................................................................. 3

4. Outdoor Unit Installation........................................................................................................... 4

4.1 Factory-Supplied Accessories ......................................................................................... 4

4.2 Initial Check ..................................................................................................................... 4

4.3 Foundation ...................................................................................................................... 5

4.4 Installation Work .............................................................................................................. 5

5. Refrigerant Piping Work ........................................................................................................... 6

5.1 Piping Materials ............................................................................................................... 6

5.2 Piping Connection ........................................................................................................... 8

5.3 Stop Valve ..................................................................................................................... 10

5.4 Additional Refrigerant Charge Calculation .................................................................... 11

5.5 Refrigerant Piping Work ................................................................................................ 12

5.6 Multi-Kit ......................................................................................................................... 14

6. Electrical Wiring ...................................................................................................................... 17

6.1 General Check .............................................................................................................. 17

6.2 Electrical Wiring Connection ......................................................................................... 18

6.2.1 For Outdoor Unit ....................................................................................................... 18

6.2.2 Electrical Wiring Between Indoor Unit and Outdoor Unit .......................................... 18

6.3 Dip Switch Setting of Outdoor Unit ................................................................................ 21

7. Test Run ................................................................................................................................. 26

8. Safety and Control Device Setting.......................................................................................... 31

1. Safety Summary

Use refrigerant R410A in the refrigerant cycle. Do not charge oxygen, acetylene

or other flammable and poisonous gases into the refrigerant cycle when performing a

leakage test or an air-tight test. These types of gases are extremely dangerous and

can cause an explosion. It is recommended that compressed air, nitrogen or

refrigerant be used for these types of tests.

Do not pour water into the indoor or outdoor unit. These products are equipped with

electrical parts. If poured, it will cause a serious electrical shock.

Do not touch or adjust safety devices inside the indoor or outdoor units. If these

devices are touched or readjusted, it may cause a serious accident.

Do not open the service cover or access panel for the indoor or outdoor units without

turning OFF the main power supply.

Refrigerant leakage can cause difficulty with breathing due to insufficient air. Turn OFF

the main switch, extinguish any naked flames and contact your service contractor, if

refrigerant leakage occurs.

The installer and system specialist shall secure safety against refrigerant leakage

according to local regulations or standards.

Use an ELB (Electric Leakage Breaker). In the event of a fault, there is danger of an

electric shock or a fire if it is not used.

Do not install the outdoor unit where there is a high level of oil mist, flammable gases,

salty air or harmful gases such as sulphur.

Do not install the indoor unit, outdoor unit, remote control switch and cable within

approximately 3 meters from strong electromagnetic wave radiators such as medical

equipment.

Supply electrical power to the system to energize the oil heater for 12 hours before

start-up after a long shutdown.

Do not step or put any material on the product.

Provide a strong and correct foundation so that;

a. The outdoor unit is not on an incline.

b. Abnormal sound does not occur.

c. The outdoor unit will not fall down due to a strong wind or earthquake.

Do not use any sprays such as insecticide, lacquer, hair spray or other flammable

gases within approximately one (1) meter from the system.

If circuit breaker or fuse is often activated, stop the system and contact your service

contractor.

Do not perform installation work, refrigerant piping work, drain piping and electrical

wiring connection without referring to our installation manual. If the instructions are

not followed, it may result in a water leakage, electric shock or a fire.

Check that the ground wire is securely connected. If the unit is not correctly grounded,

it lead electric shock. Do not connect the ground wiring to gas piping, water piping,

lightning conductor or ground wiring for telephone.

Connect a fuse of specified capacity.

Do not put any foreign material on the unit or inside the unit.

Make sure that the outdoor unit is not covered with snow or ice, before operation.

Before performing any brazing work, check to ensure that there is no flammable

material around.

When using refrigerant be sure to wear leather gloves to prevent cold injuries.

Protect the wires, electrical parts, etc. from rats or other small animals.

If not protected, rats may gnaw at unprotected parts and which may lead to a fire.

Fix the cables securely. External forces on the terminals could lead to a fire.

2.2 Necessary Tools and Instrument List for Installation

Use tools and measuring instruments only for the new refrigerant which is directly touch to refrigerant.

No. Tool No. Tool No. Tool No. Tool

1 Handsaw 6 Copper Pipe Bender 11 Spanner 16 Leveller

2Phillips

Screwdriver 7Manual Water Pump 12 Charging Cylinder 17 Clamper for Solder-

less Terminals

3 Vacuum Pump 8 Pipe Cutter 13 Gauge Manifold 18 Hoist

(for Indoor Unit)

4Refrigerant Gas

Hose 9 Brazing Kit 14 Cutter for Wires 19 Ammeter

5 Megohmmeter 10 Hexagon Wrench 15 Gas Leak Detector 20 Voltage Meter

: Interchangeability is available with current R22 : only for Refrigerant R410A (No Interchangeability with R22)

: Prohibited : only for Refrigerant R407C (No Interchangeability with R22)

R410A R407C

Pipe Cutter

Chamfering Reamer  -Cutting Pipe

Removing Burrs

Flaring Tool    *The flaring tools for R407C are applicable to R22. Flaring for Tubes

*If using flaring tube, make dimension of tube

larger for R410A.

*In case of material 1/2H, flaring is not available.

Pipe Bender 

*In case of material 1/2H, bending is not available.

Use elbow for bend and braze.

Bending

Expanding Tool 

*In case of material 1/2H, expanding of tube is not

available. Use socket for connecting tube.

Expanding Tubes

*For φ12.7, φ15.88, spanner size is up 2mm.



*For φ6.35, φ9.53, φ19.05, spanner size is

the same.

Brazing Tool *Perform correct brazing work. Brazing for Tubes

Nitrogen Gas



*Strict Control against Contamin

(Blow nitrogen during brazing.)

Prevention from

Oxidation during

Brazing

Lubrication Oil

(for Flare Surface)

*Use a synthetic oil which is equivalent to the oil

used in the refrigeration cycle.

Applying Oil to the

Flared Surface

*Synthetic oil absorbs moisture quickly.

*Check refrigerant cylinder color. Refrigerant Charging

Liquid refrigerant charging is required regarding

zeotoropic refrigerant.

Vacuum Pump 

Vacuum Pumping

Adapter for

Vacuum Pump 

Manifold Valve 

*No interchangeability is available due to higher

pressures when compared with R22.

Charging Hose



Do not use current ones to the different refrigerant.

If used, mineral oil will flow into the cycle and cause

sludges, resulting in clogging or compressor failure.

Connection diameter is different; R410A: UNF1/2,

R407C: UNF7/16.

Charging Cylinder *Use the weight scale. -

Weight Scale

 -

Measuring

Instrument for

Refrigerant Charging

Refrigerant Gas

Leakage Detector 

*The current gas leakage detector (R22) is not

applicable due to different detecting method.

Gas Leakage Check

: Interchangeability with R407C.

Vacuum Pumping,

Vacuum Holding,

Refrigerant Charging

and Check of

Pressures



Measuring Instrument and Tool

Interchangeability

with R22 Reason of Non-Interchangeability and Attention

(: Strictly Required)

Torque Wrench

Vacuum

Drying

Refrigerant

Charge

Refrigerant

Cylinder

The current ones are applicable. However, it is

required to mount a vacuum pump adapter which

can prevent from reverse flow when a vacuum

pump stops, resulting in no reverse oil flow.

Use

Refrigerant

Pipe

Extrusion

Adjustment Gauge -

Connection of

Flare Nut

Dimensional Control

for Extruded Portion

of Tube after Flaring





2. Structure

2.1 Outdoor Unit & Refrigerant Cycle

Regarding structure drawings and refrigerant cycle diagram, please refer to Technical Catalogue II.

The pressure of refrigerant R410A is 1.4 times higher than that of conventional refrigerant,

impurities such as moisture, oxide film, and grease affect easily R410A. Therefore, if the specified

materials are not used, it may cause explosion, injury, leakage, electrical shock or fire.

Do not hang the unit by the ropes at the

wooden base.

3. Transportation and Handling

3.1 Combination of Indoor Unit and

Outdoor Unit

•Various Indoor/Outdoor Unit Combinations

The following indoor units can be combined

with the HITACHI SET-FREE FSN outdoor unit.

Table 3.1 Indoor Unit Type List

3.2 Transportation

Transport the product as close to the installation

location as practical before unpacking.

•A maximum total capacity of 130% and a

minimum total capacity of 50% can be obtained

by combination of the indoor units when

compared with the nominal outdoor unit

capacity.

Table 3.2 System Combination

Do not step or put any material on the product.

Apply four lifting wires onto the outdoor unit,

when lifting it by crane.

INCORRECT

Wire Rope

Wooden Base

Nominal Capacity (HP)

0.8 1.0 1.5 2.0 2.5 3.0 3.5 4.0 5.0

In-the-Ceiling

4-Way Cassette

2-Way Cassette

Wall

Floor

Floor Concealed

Ceiling

Indoor Unit Type

•Hanging Method

When hanging the unit, ensure a balance of the

unit, check safety and lift up smoothly.

Minimum

Combina-

tion

Capacity

(HP)

Maximum

Combina-

tion

Capacity

(HP)

Combina-

tion

Quantity

Minimum

Individual

Operation

Capacity

(HP)

RAS-34FSN 17.0 44.2 2 to 32 0.8

RAS-36FSN 18.0 46.8 2 to 32 0.8

RAS-38FSN 19.0 49.4 2 to 32 0.8

RAS-40FSN 20.0 52.0 2 to 32 0.8

RAS-42FSN 21.0 54.6 3 to 32 0.8

Indoor Unit

Outdoor

Unit

Model

(1) Do not remove any packing materials.

(2) Hanging Method

Hang the unit under packing condition with

four (4) wire ropes. Push through the wire

ropes into the hang hole and clamp the

wires by using shackle as shown in

Fig. 3.1.

Wire Rope

more than 1.5m

Lead the wire ropes through

the hanging hole and clamp

the wire ropes by using

shackles.

Apply ropes on

the cushions

more than

15mm thickness.

Wooden Base

Do not apply any force

to this plate.

(Both Sides)

Do not remove

wooden frame

and plastic band.

Fig. 3.1 Hanging Work for Transportation

(3) For Installation

A. Remove the wooden base.

B. Apply four (4) wire ropes and hang the

unit as shown in Fig. 3.2.

In case of transportation after unpacking, protect

the unit with the splints or cloth.

3.3 Handling of Outdoor Unit

NOTE

Fig. 3.2 Hanging Work without Wooden Base

Do not put any foreign material into the

outdoor unit and check to ensure that none

exists in the outdoor unit before the

installation and test run. Otherwise, a fire or

failure, etc. may occur.

Wire Rope

more than 1.5m

Lead the wire ropes through

the hanging hole and clamp

the wire ropes by using

shackles.

Apply ropes on

the cushions

more than

15mm thickness.

Do not apply any force

to this plate.

(Both Sides)

Do not remove

wooden frame

and plastic band.

4.2 Initial Check

•Install the outdoor unit with a sufficient space

around the outdoor unit for operation and

maintenance as shown in Fig. 4.1.

Aluminum fins have very sharp edges. Pay

attention to the fins to avoid any injury.

Install the outdoor unit on a roof or in an area

where people except service engineers can not

touch the outdoor unit.

Front

Side

Rear

Side *H

(mm)

Min.

1500

500

750 300 1/2H

4. Outdoor Unit Installation

4.1 Factory-Supplied Accessories

Check to ensure that the following accessories

are packed with the outdoor unit.

If any of these accessories are not packed with

the unit, please contact your contractor.

Table 4.1 Factory-Supplied Accessories

NOTE

•When there are obstacles above the unit, the

four (front, rear, right and left) sides of the unit

shall be open in principle.

•Install the outdoor unit in a dry well ventilated

environment.

•Install the outdoor unit where the sound or the

discharge air from the outdoor unit does not

affect neighbors or surrounding ventilation.

The operating sound at the rear or right/left

sides is 3 to 6dB(A) higher than the value in

the catalog at the front side.

•Check to ensure that the foundation is flat,

level and sufficiently strong.

•Do not install the outdoor unit where there is a

high level of oil mist, flammable gases, salty air

or harmful gases such as sulphur.

•Do not install the outdoor unit where the

electromagnetic wave is directly radiated to the

electrical box.

•Install the outdoor unit as far as practical, being

at least 3 meters from the electromagnetic

wave radiator.

•When installing the outdoor unit in snow-

covered areas, mount the field-supplied hoods

on the top of the outdoor unit and the inlet side

of the heat exchanger.

•Install the outdoor unit where it is in the shade

or it will not be exposed to direct sunshine or

direct radiation from high temperature heat

source.

•Do not install the outdoor unit where dust or

other contamination could block the outdoor

heat exchanger.

•Install the outdoor unit in a space with limited

access to general public.

•Do not install the outdoor unit in a space where

a seasonal wind directly blows to the outdoor

heat exchanger or a wind from a building

space directly blows to the outdoor fan.

NOTE

Fig. 4.1 Installation and Service Space

Add the half of dimension H to 300mm for air intake

space of rear side, when the wall of rear side is

higher than 500mm.

•In case of no walls at the front and the rear

side of the unit, the space of 500mm for the

front side and 300mm for the rear side is

required.

•When there are walls around the unit, make

the vent hole on the wall.

Accessory Q'ty Purpose

Compressed Sheet 1

Pipe Flange of

Refrigerant Gas Piping 1

Pipe with Flare Nut of

Refrigerant Liquid Piping

(φ19.05)

Connection

for Refrigerant

Liquid Piping

Rubber Bush 4 For Connection Hole of

Operation Wiring

1For Connection Hole of

Power Source Wiring

Screw 3 Spare

Connection

for Refrigerant

Gas Piping

(5) When installing the outdoor unit, fix the unit

by anchor bolts. Refer to Fig. 4.3

regarding the location of fixing holes.

4.3 Foundation

•Concrete Foundations

(1) The height of the foundation should be

100 to 300mm higher than the ground

level.

(2) Install a drainage around foundation for

smooth drain.

(3) Install the outdoor unit in the front-rear and

right-left direction horizontally.

Check to ensure that the gradient in four

directions (front, rear, right and left) is

within 10mm.

Right Side

and Left Side Front Side

and Rear Side

Fig. 4.2 Foundations

4.4 Installation Work

(1) Secure the outdoor unit with the anchor

bolts.

IncorrectCorrect

FoundationFoundation

Fig. 4.3 Position of Anchor Bolts

(4) Provide a strong and correct foundation so

that;

a. The outdoor unit is not on an incline.

b. Abnormal sound does not occur.

c. The outdoor unit will not fall down due to

a strong wind or earthquake.

Unit: mm

Outdoor

Unit

Drainage

Mortar Hole

100 x Depth 20

Vibration

Proof Mat

more than 100

more than

100

Drainage

(Width 100 x Depth 20)

125

Less than

300

590

(760)

(614)

794

Details of P

Anchor Bolt

100mm

Anchor Bolt

M12

Washer

Filled Mortar

Nut

Concrete

782 10-38x16

Hole of Anchor Bolt

760

782782

782

(2) When installing the unit on a roof or a

veranda, drain water sometimes turns to

ice on a cold morning. Therefore, avoid

draining into an area where people often

use because it is slippery.

(3) When drain piping is necessary for the

outdoor unit, use the drain kit (DBS-26).

(1) Provide a open space above the unit.

(2) Keep a wall height as shown below.

Front Side: Max. 1,500mm

Rear Side: Max. 500mm

Right and Left Side: No Limit

(3) If the wall height exceeds the above value,

add a h1/2 or h2/2 dimension to the service

space of the front or rear side.

(4) The maximum outdoor unit quantity should

be 2 in one block.

(mm)

Min. 300

Min. 10

Min. 600 to 900 Front Side

Min. 20 Min. 10

Max. 1500

500

Min. (600 to 900)+h2/2

(mm)

Min. 300+h1/2

Wall Height: No Limit

5. Refrigerant Piping Work

Use refrigerant R410A in the refrigerant

cycle.

Do not charge oxygen, acetylene or other

flammable and poisonous gases into the

refrigerant cycle when performing a leakage

test or an air-tight test. These types of

gases are extremely dangerous and can

cause an explosion. It is recommended that

compressed air, nitrogen or refrigerant be

used for these types of tests.

Check to ensure that no pressure exists

inside the stop valve before removing the

flange.

NOTE

See the items 5.4, 5.5 and 5.6 before

refrigerant piping work.

For connecting φ31.75 pipe to RAS-34FSN

unit, cut off the section which is used for

connecting with the longer pipe size.

116

100

ID 32.0

ID 35.2

5.1 Piping Materials

(1) Prepare locally-supplied copper pipes.

(2) Select the piping size from the Table 5.1

and Table 5.2.

(3) Select clean copper pipes. Make sure

there is no dust and moisture inside of the

pipes. Blow the inside of the pipes with

nitrogen or dry air, to remove any dust or

foreign materials before connecting pipes.

Do not use any tools which produce a lot of

swarf such as a saw or a grinder.

Ensure to connect the piping among the units

in the same refrigerant cycle.

For connecting φ38.1 pipe to RAS-36FSN to

RAS-42FSN unit, use the pipe flange (factory-

supplied).

Factory Supplied Pipe Flange

for RAS-36FSN to RAS-42FSN

Factory Supplied Pipe Flange for RAS-34FSN

167

100

ID 38.3

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