Mitsubishi PAC-SF29LB Service Manual

SPLIT -TYPE AIR CONDITIONERS

TECHNICAL & SERVICE MANUAL

Air Conditioner Optional Parts R-Converter Unit

[Model name] [Service Ref.]

PAC-SF29LB PAC-SF29LB

2003

No.OC296

R-Converter Unit

w Refer to the technical & service manuals of the indoor

and outdoor units.

CONTENTS

1. OVERVIEW OF UNITS······································2

2. SPECIFICATIONS·············································8

3. OUTLINES AND DIMENSIONS························9

4. WIRING DIAGRAM·········································10

NECESSARY CONDITIONS FOR SYSTEM CONSTRUCTION

6. TROUBLESHOOTING ····································12

7. ELECTRICAL WORK ······································19

8. REFRIGERANT PIPING··································22

9. PARTS LIST····················································23

···11

1 OVERVIEW OF UNITS

SL series

MS series

Outdoor unit

R-Converter Unit

PUMY series

Branching Pipe

Capacity type

Rated capacity

Model

20 25 32 40 50 63

Cooling (kW)

2.2

2.8

3.6

4.5

5.6

7.1

Heating (kW)

2.5

3.2

4.0

5.0

6.3

8.0

SL series

4-way folw

Cassette

Ceiling

—

SLH-1AR1.TH

—

SLH-1.6AR1.TH

SLH-2AR1.TH

—

MS series

Wall Mounted

CITY MULTI indoor Units (P•FY series)

Remote Controller

Panel SLP-2AL

R-Converter Unit PAC-SF29LB

MSC-07RV-E5, MSH-07RV-A3 MSC-09RV-E5, MSH-09RV-A3

— MSC-12RV-E5, MSH-12RV-A3 MSH-18RV-E2, MSH-18RV-A2 MSH-24RV-E2, MSH-24TV-A2

1-1. SYSTEM OUTLINE

1-1-1. System example

1-2. UNIT CONSTRUCTION

Outdoor unit

Indoor unit that can be connected

Capacity

Number of units

Total system wide capacity

50~130% of outdoor unit capacity

PUMY-P125VMA PUMY-P125YMA

Type 20~Type 125

1~8 units

PAC - SF 29 LB

(Indispensable) Optional parts of PAC

Symble of factory

Lev Box

Design code No.

1-3. METHOD FOR IDENTIFYING

PUMY-P125YMA

MSH-18RV SLH-1.6AR MSC-09RV MSC-09RV MSC-07-RV

Living

R-Converter Unit (PAC-SF29LB)

Bedroom (1) Bedroom (2) Bedroom (3)

Dining

Total rated capacity 160 163

■ R-Converter Unit

1-4. TYPICAL COMBINATION EXAMPLE

■ Verification

The rated capacity should be determined by observing the below. The unit’s quantities are limited in 1 to 8 units. For the next step, make sure that the selected total indoor unit capacity is in a range of 63 ~ 163. The total indoor unit capacity should be within the outdoor units. (=125 is preferred). Combination of excessive indoor units and an outdoor unit may reduce the cooling capacity of each indoor unit. The rated indoor capacity is as blow table.

Example:

W Capacity type of indoor units

Refer to page 2.

MSH-18 = 50 SLH-1.6 = 40 MSC-09 = 25 MSC-09 = 25 MSC-07 = 20

1-5. INSTALLATION

1-5-1. Installing the R-Converter Unit (mm)

Parts to procure locally

• Suspension bolts or anchor bolts : W3/8 (M10)

• Nut : W3/8 (M10)

• Washer : W3/8 (M10)

Installing the unit in a ceiling

(1) Install the suspension bolts

Wooden structures

• Use tie beams (single storied houses) or second floor beams (two story houses) as reinforcing members.

• Wooden beams for suspending air conditioners must be sturdy and their sides must be at least 6 cm long if the beams are separated by not more than 90 cm. The size of the suspension bolts should be M10 (W3/8). (The bolts are not supplied with the unit.)

A Ceiling B Rafter C Beam D Roof beam

B* Suspension bolt pitch

Ferro-concrete structures

Secure the suspension bolts using the method shown, or use steel or wooden hangers, etc. to install the suspension bolts.

E Use inserts rated at 100-150 kg each (procure locally) F Suspension bolts M10 (W3/8) (procure locally) G Steel reinforcing rod

(2) Install the R-Converter unit.

Installing the unit on a wall

(1) Install the anchor bolts. (2) Install the R-Converter unit.

Do not install the refrigerant pipes on top of the unit when installing the unit on a wall, otherwise condensation can enter the electrical devices, which can cause an electric shock or a fire.

1-5-2. Installing Refrigerant Piping (mm)

Copper piping

O.D. (mm)

{6.35 {9.52

Flare dimensions

{A dimenson (mm)

8.6-9.0

12.6-13.0

Torque

N-m (kgf

•cm)

14-18 (140-180) 34-42 (340-420)

In order to prevent gas leaks, tighten the flared nut to the specified torque even when not connecting the indoor unit refrigerant piping.

Check the R-Converter unit accessories and parts

1 Pipe cover o 2 2 Band (long) o 4 3 Thermistor holder—[6.35 (liquid) o 1 4 Thermistor holder—[9.52 (liquid or gas) o 1

5 Thermistor holder—[12.7 (gas) o 1 6 Thermistor holder—[15.88 (gas) o 1 7 Thermistor insulation (3o150o60) o 2 8 Band (short) o 2

Connect R-Converter unit to the liquid pipe

• For identification purposes, list the indoor unit model names in the nameplate on the control box of the R-Converter unit.

• To prevent water from dripping from the refrigerant piping, wrap both the liquid and gas piping with commercially available thermal insulation that is at least 12 mm thick and which is able to withstand temperatures in excess of 100 °C.

• See the indoor and outdoor unit installation manual when creating a vacuum and opening or closing valves.

• Install the piping so that vibrations from the piping do not transmit to the unit.

Installing piping to the unit

(1) Remove the flared nuts and caps from the R-Converter unit. (2) Flare the ends of the liquid and gas piping, and apply refrigeration oil (procure locally) to the flared seat. (3) Connect the refrigerant piping immediately. Always tighten the flared nuts to the specified torque using a torque wrench and

double spanner. (4) Press the pipe covers 1 on the liquid piping against the unit and wrap it to hold it in place. (5) Fasten the supplied bands 2 10-20 mm from each end of the pipe covers 1 .

. Caution :

• Tighten the flare nut with a torque wrench in the specified method.

• Do not use the existing refrigerant piping, when use R407C refrigerant.

• Take precautions so that the Freon gas is not leaked during a fire.

Section of connection

Match the refrigerant piping size to the indoor unit. If using a liquid pipe that is [[9.52 mm, use joint pipe PAC493PI or a locally procured tandem joint.

• Refrigerant charge : See the outdoor unit installation manual. Use only R407C or R22 refrigerant.

• Use the following procedures for connecting parts to the indoor unit.

a) Tighten the flared nuts to prevent refrigerant leaks. b) Fasten the pipe covers 1 to the pipes with the

bands 2 to prevent condensation.

1-5-3. Installing the thermistors (mm)

Indoor unit capacity pipe size (mm)

BTU 07, 09 12, 13

24, 30

1.6 2

2.5

Liquid

{6.35 {6.35 {6.35 {9.52

Gas

{9.52

{12.7 {15.88 {15.88

Be sure to install the thermistors (gas and liquid) supplied with the unit as shown in the illustration.

• If the thermistors are not installed, the unit will not operate. If the thermistors are installed incorrectly, the unit will not operate properly.

Take precaution so that condensation does contact the thermistor leads or enters the electrical devices. Before installing thermal insulation to the frame connecting points of the indoor unit, be sure to install the thermistors according to the procedures given on this page.

Thermistor installation order

(1) Securely fasten the thermistors (liquid and gas) supplied with the unit using the thermistor holders (3, 4, 5, 6) at the

fastening points of indoor unit refrigerant pipes.

• Set thermistor-L (liquid) in thermistor holders 3 or 4 and thermistor-G (gas) in thermistor holders 4, 5 or 6, and then fasten the refrigerant pipes.

Select thermistor holders that match the size of the refrigerant piping.

Liquid

Gas

. Caution :

• To prevent condensation from dripping on the thermistor fasteners, wrap them with sufficient thermal insulation.

• Install the thermistors so that the piping is on top (as shown in above illustration).

• Take out the thermistor lead from above the piping.

• Install the thermistors indoors.

• Route the following lead, line, and cable pairs so that they do not come into contact with each other.

-Thermistor lead and indoor unit-R-Converter transmission line

-Thermistor lead and power supply cable

-Transmission line and power supply cable

(2) Insulate the thermistors with the supplied thermal insulation 7.

(3) Cut a 100 mm slit on the top portion of the extension piping pipe covers, and then cover the thermistors with the pipe

covers.

(4) Wrap the thermal insulation covering the thermistor with tape.

. Caution :

Be sure to take out the thermistor lead from above.

(5) Cover the flare and thermistor with the thermal insulation (for protecting the flare) supplied with the indoor unit.

Bundle up the excess thermistor lead.

. Caution :

• Do not make the thermistor lead taut.

• Do not add extensions to the thermistor lead.

• Do not cut the excess thermistor lead.

• Make sure that the bundled thermistor lead does not interfere with any other wiring.

2 SPECIFICATIONS

mm mm mm mm

kg mm(in.) mm(in.)

Model name Connectable number of indoor units Total capacity index of indoor units to be connected Power supply External finish Drain hose size (on site)

Dimensions Weight

Piping connection (Flare) Wiring

Width Depth Height

Liquid Gas To indoor unit To outdoor unit

PAC-SF29LB

Type 20-63

Single phase, 220/230/240V, 50Hz, Single phase, 220V, 60Hz

Hot-dip Zinc - coated steel (No external finish)

— 280 220 126

2.8

6.35 (1/4)W —

2-core cable

2-core shield cable (Non-polarized)

Model Name (series)

Connectable indoor units

Connectable outdoor units

Wall mounted MS series* Cassette Ceiling SL series*

PUMY series *

* See page 2 for detail model name.

R-Converter Unit : PAC-SF29LB

W If using on indoor unit with [9.52 piping connection and using a [9.52 refrigerant pipe, use joint pipe “PAC-493PI” (optional

parts) or a locally procured tandem joint ([6.35

➝[9.52)

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