Mitsubishi FDTN208HEN-S, FDTN258HEN, FDTN208HEP, FDTN258HEN-S, FDTN258HEP Instruction Manual

183

FDTN-H

6. CEILING RECESSED TYPE
PACKAGED AIR CONDITIONER

Split system, Air to air
heat pump type

FDTN208HEN-S, FDTN208HEN, FDTN208HEP
FDTN258HEN-S, FDTN258HEN, FDTN258HEP
FDTN308HEN-S, FDTN308HES-S, FDTN308HEN
FDTN308HEP, FDTN308HES
FDTN408HES-S, FDTN408HES
FDTN508HES-S, FDTN508HES, FDTN508HEM

FDT208HEN-S, FDT258HEN-S, FDT308HEN-S
FDT308HES-S, FDT308HEN, FDT308HES
FDT408HES-S, FDT408HES
FDT508HES-S, FDT508HES

()

183

FDTN-H

184

FDTN-H

CONTENTS

6.1 GENERAL INFORMATION........................................................................185

6.1.1 Specific features .................................................................................185

6.1.2 How to read the model name .............................................................185

6.2 SELECTION DATA.....................................................................................186

6.2.1 Specifications......................................................................................186

6.2.2 Range of usage & limitations.............................................................212

6.2.3 Exterior dimensions............................................................................213

6.2.4 Exterior appearance ..........................................................................223

6.2.5 Piping system......................................................................................224

6.2.6 Selection chart ....................................................................................228

6.2.7 Noise level ...........................................................................................231

6.3 ELECTRICAL DATA ..................................................................................233

6.3.1 Electrical wiring ..................................................................................233

6.4 OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER .............241

6.5 APPLICATION DATA.................................................................................256

6.5.1 Installation of indoor unit...................................................................257

6.5.2 Installation of wired remote controller..............................................260

6.5.3 Installation of outdoor unit.................................................................261

6.6 MAINTENANCE DATA...............................................................................271

6.6.1 Servicing..............................................................................................271

6.6.2 Trouble shooting for refrigerant circuit ............................................272

6.6.3 Diagnosing of microcomputer circuit ...............................................273

185

FDTN-H

6.1 GENERAL INFORMATION

6.1.1 Specific features

(1) Less refrigerant charge amount due to use of double phase refrigerant flow system. The total refrigerant charge amount has

been reduced by more than 50%.

(2) The indoor outdoor interconnection signal wiring has been done away with. The microcomputer chip is installed in the

indoor unit. There is no need for the unit to communicate between the outdoor and indoor units so the unit is more resistant
to electromagnetic noise thus the incidence of microcomputer malfunction has been reduced. The compressor in the outdoor
unit has its own self protection function, that reacts according to abnormal high pressure and excessive high temperature.

(3) There are only four power lines between the outdoor and indoor unit. As no signal wire is used there is no need to separate the

power line from the signal line. One cab tyre cable with 6 wires encased in one sheath is enough for conducting the wiring

work between the outdoor unit and the indoor unit. This contributes to simpler wiring work in the field.
(4) All air supply ports have auto swing louvers. The indoor fan motor has two speeds of high and low.
(5) All models have service valves protruding from the outdoor unit for faster flare connection work in the field.

(6) Low sound level

Operating noise has been remarkably reduced due to adoption of the crescent turbo fan which cuts off wind-blowing noise

and also console type of cabinet which is highly effective to protect vibration.

(7) 700mm high drain head

Adoption of drain pump with high drain head and high capacity (600cc/min) has made it possible to have maximum 700

mm(from below ceiling drain head.[In case 700mm drain head is required, set it up close to the unit. It is impossible to do

piping on down slope.]

6.1.2 How to read the model name

Example: FDTN 20 8 H EN

Applicable power source ... See the specifications
Heat pump type
Series No.
Norminal capacity

Model name

FDTN: Ceiling recessed type unit with

wireless remote controller

FDT: Ceiling recessed type unit with

wired remote controller

FDC: Outdoor unit

196

FDTN-H

Model FDTN308HEN

Operation data

(3)

Item

Model

FDTN308H FDC306HEN3

Nominal cooling capacity

(1)

W 7100

Nominal heating capacity

(1)

W 7300

Power source 1 Phase, 220/240V, 50Hz

Cooling input kW 3.07/3.11
Running current (Cooling) A 15.6/16.3
Power factor (Cooling) % 89/79
Heating input kW 2.82/2.86
Running current (Heating) A 14.5/15.2
Power factor (Heating) % 88/78
Inrush current (L.R.A) A 89
Noise level

(4)

dB(A) Hi 41 Lo:35 56

Exterior dimensions

mm

Unit 260 × 840 × 840

844 × 950 × 340

Height × Width × Depth Panel 30 × 950 × 950

Net weight kg 30 (Unit:24 Panel:6) 69
Refrigerant equipment

– RC5532ENE1 × 1

Compressor type & Q’ty

Motor kW – 2.24
Starting method – Line starting

Heat exchanger Louver fins & inner grooved tubing Slitted fins & bare tubing
Refrigerant control Capillary tube Capillary tube

Refrigerant R22

Quantity kg Holding charged

1.3 [Pre-charged up to the piping length of 5m]

Refrigerant oil r – 1.63 (SUNISO 3GS)

Defrost control IC controlled de-icer
High pressure control High pressure regulator valve

Air handling equipment

Fan type & Q’ty

Turbo fan × 1 Propeller fan × 1

Motor W 30 × 1 60 × 1
Starting method Line starting Line starting

Air flow (Standard) CMM Hi:17 Lo:12 54
Fresh air intake Available –

Air filter, Q’ty Long life filter ×1(washable) –

Shock & vibration absorber Rubber sleeve (for fan motor) Rubber mount (for compressor)
Electric heater W – 40 (Crank case heater)

Operation control

Operation switch Wireless remote control switch – (Indoor unit side)

Room temperature control Thermostat by electronics –
Safety equipment Internal thermostat for fan motor. Internal thermostat for fan motor.

Frost protection thermostat.

Installation data mm Liquid line: φ9.52 (3/8″) Gas line: φ15.88 (5/8″)

Refrigerant piping size (in)

Connecting method Flare piping

Drain hose (Connectable with VP25) –

Insulation for piping Necessary (both Liquid & Gas lines)
Accessories Mounting kit. Wireless remote controller. Drain hose
Optional parts Decorative Panel

(2) This packaged air conditioner is manufactured and tested in conformity with the following standard. JIS B8616 “UNITARY AIR CONDITIONERS”
(3) The operation data indicate when the air conditioner is operated at 220V and 240V respectively.
(4) Indicates the value at mild mode.

Notes (1) The data are measured at the following conditions.

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

Cooling 27˚C 19˚C 35˚C 24˚C
Heating 20˚C – 7˚C 6˚C

ISO-T1, JIS B8616

FDTN308HEN

Internal protector for compressor.
Internal thermostat for fan motor.
Internal pressure relief valve for compressor.

198

FDTN-H

Operation data

(3)

Item

Model

FDTN308H FDC306HES3

Nominal cooling capacity

(1)

ISO-T1

W

7100/7700

ISO-T3 6000

Nominal heating capacity

(1)

ISO-T1 W 7300/7900

Power source 3 Phase, 380-415V 50Hz or 380V 50Hz/415V 50Hz, 380V 60Hz

Cooling input kW 2.83/2.84/3.35
Running current (Cooling) A 5.3/5.3/6.0
Power factor (Cooling) % 81/75/85
Heating input kW 2.50/2.51/2.90
Running current (Heating) A 4.9/5.0/5.6
Power factor (Heating) % 78/70/79
Cooling input kW 3.58
Running current (Cooling) A 6.5

Power factor (Cooling) % 84
Inrush current (L.R.A) A 43
Noise level

(4)

dB(A) Hi:41 Lo:35 56

Exterior dimensions

mm

Unit 260 × 840 × 840

844 × 950 × 340

Height × Width × Depth Panel 30 × 950 × 950

Net weight kg 30 (Unit:24 Panel:6) 69
Refrigerant equipment

– RC5538ESE1 × 1

Compressor type & Q’ty

Motor kW – 2.24
Starting method – Line starting

Heat exchanger Louver fins & inner grooved tubing Slitted fins & bare tubing
Refrigerant control Capillary tube Capillary tube

Refrigerant R22

Quantity kg Holding charged

1.3 [Pre-charged up to the piping length of 5m]

Refrigerant oil r – 1.63 (SUNISO 3GS)

Defrost control IC controlled de-icer
High pressure control High pressure regulator valve

Air handling equipment

Fan type & Q’ty

Turbo fan × 1 Propeller fan × 1

Motor W 30 × 1 60 × 1
Starting method Line starting Line starting

Air flow (Standard) CMM Hi:17 Lo:12 54/56
Fresh air intake Available –

Air filter, Q’ty Long life filter ×1(washable) –

Shock & vibration absorber Rubber sleeve (for fan motor) Rubber mount (for compressor)
Electric heater W – 40 (Crank case heater)

Operation control

Operation switch Wireless remote control switch – (Indoor unit side)

Room temperature control Thermostat by electronics –
Safety equipment Internal thermostat for fan motor. Internal thermostat for fan motor.

Frost protection thermostat.

Installation data mm

Liquid line: φ9.52 (3/8″) Gas line: φ15.88 (5/8″)

Refrigerant piping size (in)

Connecting method Flare piping

Drain hose (Connectable with VP25) –

Insulation for piping Necessary (both Liquid & Gas lines)
Accessories Mounting kit. Wireless remote controller. Drain hose
Optional parts Decorative Panel

Model FDTN308HES

ISO-T1ISO-T3

(2) This packaged air conditioner is manufactured and tested in conformity with the following standard. JIS B8616 “UNITARY AIR CONDITIONERS”
(3) The operation data indicate when the air conditioner is operated at 380/415V 50Hz and 380V 60Hz respectively.
(4) Indicates the value at mild mode.

Notes (1) The data are measured at the following conditions.

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

Cooling 27˚C 19˚C 35˚C 24˚C
Heating 20˚C – 7˚C 6˚C

ISO-T1, JIS B8616

Cooling 29˚C 19˚C 46˚C 24˚C ISO-T3, SASO

FDTN308HES

Internal protector for compressor.
Internal thermostat for fan motor.
Internal pressure relief valve for compressor.

200

FDTN-H

Operation data

(3)

Item

Model

FDTN508H FDC506HES3

Nominal cooling capacity

(1)

ISO-T1

W

12500/14000

ISO-T3 11900

Nominal heating capacity

(1)

ISO-T1 W 12800/14400

Power source 3 Phase, 380-415V 50Hz or 380V 50Hz/415V 50Hz, 380V 60Hz

Cooling input kW 4.87/4.87/5.83
Running current (Cooling) A 10.0/10.0/11.0
Power factor (Cooling) % 74/68/81
Heating input kW 4.49/4.51/5.41
Running current (Heating) A 9.2/9.3/10.2
Power factor (Heating) % 74/67/81
Cooling input kW 6.43
Running current (Cooling) A 12.0

Power factor (Cooling) % 81
Inrush current (L.R.A) A 68
Noise level

(4)

dB(A) Hi:49 Lo:43 59

Exterior dimensions

mm

Unit 320 × 840 × 840

1250 × 950 × 340

Height × Width × Depth Panel 30 × 950 × 950

Net weight kg 36 (Unit:30 Panel:6) 91
Refrigerant equipment

– RC5563ESE2 × 1

Compressor type & Q’ty

Motor kW – 3.73
Starting method – Line starting

Heat exchanger Louver fins & inner grooved tubing Slitted fins & bare tubing
Refrigerant control Capillary tube Capillary tube

Refrigerant R22

Quantity kg Holding charged

2.3 [Pre-charged up to the piping length of 5m]

Refrigerant oil r – 2.07 (SUNISO 3GS)

Defrost control IC controlled de-icer
High pressure control High pressure regulator valve

Air handling equipment

Fan type & Q’ty

Turbo fan × 1 Propeller fan × 2

Motor W 130 × 1 60 × 2
Starting method Line starting Line starting

Air flow (Standard) CMM Hi:28 Lo:20 100/110
Fresh air intake Available –

Air filter, Q’ty Long life filter ×1(washable) –

Shock & vibration absorber Rubber sleeve (for fan motor) Rubber mount (for compressor)
Electric heater W – 40 (Crank case heater)

Operation control

Operation switch Wireless remote control switch – (Indoor unit side)

Room temperature control Thermostat by electronics –
Safety equipment Internal thermostat for fan motor.

Frost protection thermostat.

Installation data mm

Liquid line: φ9.52 (3/8″) Gas line: φ19.05 (3/4″)

Refrigerant piping size (in)

Connecting method Flare piping

Drain hose (Connectable with VP25) –

Insulation for piping Necessary (both Liquid & Gas lines)
Accessories Mounting kit. Wireless remote controller. Drain hose
Optional parts Decorative Panel

Model FDTN508HES

ISO-T1ISO-T3

Item Indoor air temperature Outdoor air temperature

Standards

Operation DB WB DB WB

Cooling 27˚C 19˚C 35˚C 24˚C
Heating 20˚C – 7˚C 6˚C

ISO-T1, JIS B8616

Cooling 29˚C 19˚C 46˚C 24˚C ISO-T3, SASO

(2) This packaged air conditioner is manufactured and tested in conformity with the following standard. JIS B8616 “UNITARY AIR CONDITIONERS”
(3) The operation data indicate when the air conditioner is operated at 380/415V 50Hz and 380V 60Hz respectively.
(4) Indicates the value at mild mode.

Notes (1) The data are measured at the following conditions.

FDTN508HES

Internal protector for compressor.
Internal thermostat for fan motor.
Internal pressure relief valve for compressor.

212

FDTN-H

Models FDTN208~508 (FDC208~508 type)

FDT208~508 (FDC208~508 type)

6.2.2 Range of usage & limitations

Models FDTN208, 258 (FDC208, 258 type) FDTN308~508 (FDC308~508 type)

Item FDT208, 258 (FDC208, 258 type) FDT308~508 (FDC308~508 type)
Indoor return air temperature

(Upper, lower limits)
Outdoor air temperature

(Upper, lower limits)
Indoor unit atmosphere (behind ceiling)

temperature and humidity

Refrigerant line (one way) length

Vertical height difference between
outdoor unit and indoor unit

Power source voltage

Voltage at starting

Frequency of ON-OFF cycle

ON and OFF interval

Dew point temperature: 28˚C or less, relative humidity: 80% or less

Refer to the selection chart

Max. 30m Max. 50m

Max. 10 times/h

Max. 3 minutes

Min. 85% of rating

Rating ± 10%

Max. 20m (Outdoor unit is higher) Max. 30m (Outdoor unit is higher)
Max. 15m (Outdoor unit is lower) Max. 15m (Outdoor unit is lower)

Models FDTN208~508 (FDC206~506 type)

FDT308~508 (FDC306~506 type)

Indoor return air temperature
(Upper, lower limits)

Outdoor air temperature
(Upper, lower limits)

Indoor unit atmosphere (behind ceiling)
temperature and humidity

Refrigerant line (one way) length

Vertical height difference between
outdoor unit and indoor unit

Power source voltage

Voltage at starting

Frequency of ON-OFF cycle

ON and OFF interval

Dew point temperature: 28˚C or less, relative humidity: 80% or less

Refer to the selection chart

Max. 30m

Max. 10 times/h

Max. 3 minutes

Min. 85% of rating

Rating ± 10%

Max. 15m

Models FDTN208~508 (FDC206~506 type)

Item FDT308~508 (FDC306~506 type)

214

FDTN-H

Unit : mm

Decorative Panel

VIEW A

VIEW DVIEW C

VIEW B

Space for installation and service

Liquid piping

φ9.52(3/8")

860~890

(Ceiling hole size)

267

310332

675

(Suspension bolts pitch)

637

422

420

400

780

(Suspension bolts pitch )

Fresh air

opening for ducting

Exhaust air
opening for ducting

Drain hose (Accessories)

(Connectable with VP25)

Gas piping
( φ15.88)

(M10 or M8 ×4pcs.)

B→

C

Air inlet grille

Air outlet grille

630

950

295~325

700

or less

(Max. Drain up)

210

137

187

260

30

45

or more

95

Lug for
suspension bolts

Control box

Hole for wiring

Suspension bolts

A

↑

840

1000

1000

Obstacle

or more

or more

55

25

160 33

80

113

140

Holes for
tapping screws

4-φ4

112

100

60

140

42

140

Holes for
tapping screws

6-φ4

D→

↑

Indication boad
(Only case of FDTN type)

Models FDTN258H, 308H

FDT258, 308

215

FDTN-H

Models FDTN408H, 508H

FDT408, 508

Liquid piping
φ9.52(3/8")

860~890

(Ceiling hole size)

267

310332

675

(Suspension bolts pitch)

637

422

420

400

780

(Suspension bolts pitch )

Fresh air
opening for ducting

Exhaust air
opening for ducting

Drain hose (Accessories)
(Connectable with VP25)

Gas piping

φ19.05(3/4")

(M10 or M8 ×4pcs.)

B→

C

Air inlet grille

Air outlet grille

630

950

295~325

700

or less

(Max. Drain up)

270

137

187

320

30

45

or more

95

Lug for
suspension bolts

Control box

Hole for wiring

Suspension bolts

A

↑

840

1000

1000

Obstacle

or more

or more

55
25

160 93

80

113

140

Holes for
tapping screws

4-φ4

112

100

60

140

42

140

Holes for
tapping screws

6-φ4

D→

↑

Indication board
(Only case of FDTN type)

Unit : mm

Decorative Panel

VIEW A

VIEW DVIEW C

VIEW B

Space for installation and service

216

FDTN-H

(2) Remote controller

(a) Wireless remote controller

Unit: mm

MODE TEMP ON/OFF

AUTO COOL DRY FAN HEAT

FILTER

°

C

AM
PM

ON

AM
PM

OFF

FAN HI LO

60

20.5

161.5

● Indication board of indoor unit

16

Remote controller mounting dimensions

47

7

Standard Within 0.3 mm

2

× Within 100 m

0.5 mm

2

× Within 200 m

0.75 mm

2

× Within 300 m

1.25 mm

2

× Within 400 m

2 mm

2

× Within 600 m

Allowable rang of wire thickness and length

♦ Usable JIS box, JIS C 8336
⋅ Switch box for 1 piece (without cover)

(use of the mark hole as illustrated on the left)
⋅ Switch box for 2 pieces
(use of the mark hole as illustrated on the left)
(without cover)
(use of the mark hole as illustrated on the left)
(when installing the cover)

Note (1) Allowable length of remote controller cable: 600 m

0.3mm2, 3cores (O.D.φ5.6)

LCD display

120

Wall

Wire

(Recessed)

Junction box

(Locally Purchased)

89

83.5

17

120

Remote controller outline

For the passage
after wiring

120

60
46

(b) Wired remote controller

Unit: mm

218

FDTN-H

Liquid piping: ø9.52 (3/8")
(Flare connecting)

Gas piping: ø15.88 (5/8")

Terminal block

Opening for
electric wiring

Opening for
electric wiring

Holes for anchor bolt

(M10 × 4 pcs.)

Holes for drain
(ø9.52 × 3pcs.)

Electric wiring

Opening for piping
and electric wiring

Opening for piping
and electric wiring

Opening for piping
and electric wiring

(Flare connecting)

845

10

50

380 1515

340

55

15103

150

7050

47

3535

110

460

110

195

50

195

40

880

310222

40

L

2

L3

L4

L1

Air
inlet

Air inlet

Air outlet

Maintenance
space

150 580 150

50 15

15 50

50

50
5027

50 15

Models FDC258HEN3, 308HEN3, 308HES3

Required space for maintenance and air flow Minimum allowable space to the obstacles

Unit:mm

Mark

123

L1 Open Open 500
L2 300 5 Open
L3 100 150 100
L4 555

Installation

type

Notes
(1) Avoid the location where four sides are entirel y

surrounded by walls.

(2) Fix the unit by anchor bolts without fail. Restrict

the protrusion length of anchor bolt to 15 mm
and under.

(3) When strong wind blows against the unit, direct

the discharge port at a right angle to the wind

direction.
(4) Secure the space of 1 m and over at the top of unit.
(5) Make the height of obstruction wall in front of

discharge port lower than the height of unit.

Unit: mm

VIEW A

Liquid piping: ø9.52 (3/8")
(Flare connecting)

Gas piping: ø15.88 (5/8")
(Flare connecting)

40

53

95

40

219

FDTN-H

50

110

195

555

578

920

10

46

50

48

100

165

580

175

35

15

380 15

15

103

5050

50

50 110

195

50

70

50 15

50

27

50

15

47

295237

15

340

35

55

55

150

40

Gas piping: ø 19.05 (3/4")

(Flare connecting)

Liquid piping: ø 9.52 (3/8")

(Flare connecting)

Opening for electric wiring

Holes for drain
(ø 20 × 3pcs.)

Opening for
electric wiring

Opening for piping
and electric wiring

Opening for piping
and electric wiring

Electric wiring

Opening for piping
and electric wiring

Holes for anchor bolt

(M10 × 4pcs.)

Gas piping: ø 19.05 (3/4")

(Flare connecting)

Liquid piping: ø 9.52 (3/8")

(Flare connecting)

Opening for electric wiring

Terminal block

1250 (1050)

A

Note (1) The ( ) value dimension
for model FDC408HES3.

L

2

L

3

L

4

L

1

Air
inlet

Air inlet

Air outlet

Maintenance
space

Models FDC408HES3, 508HES3

Required space for maintenance and air flow Minimum allowable space to the obstacles

Unit:mm

Mark

123

L1 Open Open 500
L2 300 5 Open
L3 150 300 150
L4 555

Installation

type

Notes
(1) Avoid the location where four sides are entirel y

surrounded by walls.
(2) Fix the unit by anchor bolts without fail. Restrict

the protrusion length of anchor bolt to 15 mm

and under.
(3) When strong wind blows against the unit, di-

rect the discharge port at a right angle to the

wind direction.
(4) Secure the space of 1 m and over at the top of unit.
(5) Make the height of obstruction wall in front of

discharge port lower than the height of unit.

VIEW A

Unit: mm

221

FDTN-H

Mark

123

L1 Open Open 500
L2 300 0 Open
L3 100 150 100

Installation

type

Notes
(1) Fix the unit with anchor bolts.
(2) Strong wind must not be directed to the air

outlet.

(3) Free space over the unit must be larger than

1 m.

(4) The unit should not be surrounded by

obstructions in all direction.
At least one direction around the unit must be
free.

Models FDC306HEN3, 306HEP3, 306HES3

Minimum allowable space to the obstacles

Unit:mm

Required space for maintenance and air flow

Unit: mm

Anchor bolts
(M10 × 4 pcs)

580

380

222

FDTN-H

Notes
(1) Fix the unit with anchor bolts.
(2) Strong wind must not be directed to the air

outlet.

(3) Free space over the unit must be larger than

1 m.

(4) The unit should not be surrounded by

obstructions in all direction.
At least one direction around the unit must be
free.

Minimum allowable space to the obstacles

Models FDC406HES3, 506HES3, 506HEM3

Unit:mm

Mark

123

L1 Open Open 500
L2 300 0 Open
L3 150 300 150

Installation

type

Required space for maintenance and air flow

Unit: mm

580

380

223

FDTN-H

6.2.4 Exterior appearance

(1) Indoor unit

Models All models

(2) Outdoor unit

Model FDC208HEN3

Models FDC306HEN3, 306HEP3,

306HES3

Models FDC406HES3, 506HES3

506HEM3

Pearl white

(Decorative panel)

Polar white

Polar white

Polar white

Polar white

Models FDC258HEN3, 308HEN3,

308HES3

Type

Item

Panel model Remarks

FDTN208H TN-PSC-22W-E

FDTN258H~508H TN-PSC-32W-E

FDT208 T-PSA-22W-E

Without swing

FDT258~508 T-PSA-32W-E

For wireless
remote controller

For wired
remote controller

Models FDC408HES3, 508HES3

Models FDC206HEN3, 206HEP3

256HEN3, 256HEP3

Polar white

Polar white

225

FDTN-H

Models FDTN208HEN, 208HEP, 258HEN, 258HEP

Models FDTN508HES-S, FDT508HES-S

Indoor unit

Outdoor unit

Thermistor

(Th

I

-R)

Thermistor

(Th

O

-D)

Thermistor

(Th

O

-R)

Solenoid

valve (SV2)

Solenoid

valve (SV1)

Thermistor

(Th

O

-A)

Thermistor

(Th

I

-A)

Heat exchanger

Heat exchanger

High pressure switch (63H

2

)

(For fan motor control)

Strainer

Strainer Strainer

StrainerCapillary

tube

Capillary tube

Capillary tube

Capillary

tube

Capillary
tube

Liquid line

(ø9.52)

Gas line
(ø19.05)

Flare connecting

Service valve

(Flare connecting)

Service valve

(Flare connecting)

Cooling cycle
Heating cycle

4way valve

Compressor

Accumulators

Check valve

Check

joint

Check joint

Check joint

Oil separator

Sub­cooling
coil

Indoor unit

Outdoor unit

226

FDTN-H

Thermistor
(Th

I-A)

Heat exchanger

Liquid line
(ø9.52)

Strainer Strainer

Compressor

Accumlator

StrainerStrainer

Thermistor
(Th

I-R)

Service valve
(Flare connecting)

Capillary tube

Capillary tube

High Pressure
regulator valve

Defrost
Thermostat

Check joint

Heat
exchanger

4way valve

High pressure switch

(For fan motor control)

Service valve
(Flare connecting)

Check joint

Check joint

Gas line
(ø19.05)

(23DH)

Thermistor
(Th

I

-A)

Heat exchanger

Liquid line
(ø9.52)

Strainer Strainer

Compressor

StrainerStrainer

Thermistor
(Th

I

-R)

Service valve
(Flare connecting)

Capillary tube

Capillary tube

High Pressure
regulator valve

Defrost
Thermostat

Check joint

Heat
exchanger

4way valve

High pressure switch
(For fan motor control)

Service valve
(Flare connecting)

Check joint

Check joint

Gas line
(ø15.88)

(23DH)

Indoor unit

Outdoor unit

Models FDTN308HEN, 308HEP, 308HES

FDT308HEN, 308HES

Models FDTN408HES, 508HES, 508HEM

FDT408HES, 508HES

Cooling cycle
Heating cycle

Indoor unit

Outdoor unit

Cooling cycle
Heating cycle

227

FDTN-H

Preset point of the protective devices

Parts name Mark

Thermistor
(for protection over­loading in heating)

Thermistor
(for frost prevention)

Thermistor
(for detecting dis­charge pipe temp.)

Thermistor
(for detecting heat
exchange temp.)

High pressure switch
(for controlling FM0)

OFF 68˚C

ON 61˚C

Equipped

unit

ThI-R

Tho-D

Tho-R

63H2

Indoor unit

Outdoor unit

Outdoor unit

Outdoor unit

FDTN308~508

(FDC308~508 type only)

FDT308~508

OFF 2.5˚C

ON 10˚C

OFF 135˚C

ON 90˚C

OFF 70˚C

ON 60˚C

OFF 2.5MPa (25.5 Kgf/cm2G)

ON 2.06MPa (21 kgf/cm2G)

Parts name Mark

Thermistor
(for protection over­loading in heating)

Thermistor
(for frost prevention)

Defrost thermostat

High pressure switch
(for controlling FMo)

OFF 68˚C
ON 61˚C

Equipped

unit

THI-R

23DH

2

23DH

1

63H2

Indoor unit

Outdoor unit

Outdoor unit

FDTN208~508

(FDC208, 258 or FDC206~506 type only)

FDT208~508

OFF 2.5˚C
ON 10˚C

OFF 12˚C
ON -6˚C

OFF 2.5MPa (25.5 Kgf/cm2G)

ON 1.86MPa (19 kgf/cm2G)

228

FDTN-H

Outdoor air W.B. temperature (˚CW.B.)

Indoor air W.B. temperature (˚CW.B.)

ISO-T1 Standard condition

(b) Only case of ISO-T1 models (Including 308HEN-S, 308HES-S, 408HES-S, 508HES-S type)

Indoor air W.B. temperature (˚CW.B.)

ISO-T1 Standard condition

Outdoor air D.B.

temperature (˚CD.B.)

Cooling operation

Indoor air D.B.

temperature (˚CD.B.)

Heating operation

Coefficient of cooling and heating capacity

in relation to temperatures

Outdoor air D.B.

temperature (˚CD.B.)

Cooling operation

Indoor air D.B.

temperature (˚CD.B.)

Heating operation

Coefficient of cooling and heating

capacity in relation to temperatures

6.2.6 Selection chart

Correct the cooling and heating capacity in accordance with the conditions as follows. The net cooling and heating capacity can be obtained in
the following way.

Net capacity = Capacity shown on specification × Correction factors as follows.

(1) Coefficient of cooling and heating capacity in relation to temperatures

(a) Only case of ISO-T1 models (Except 308HEN-S, 308HES-S, 408HES-S, 508HES-S type)

ISO-T1 Standard condition

Outdoor air W.B. temperature (˚CW.B.)

229

FDTN-H

(C) Only case of ISO-T3 and SASO models

Item

Air flow

Hi 0.112 0.050 0.065 0.076 0.025

Lo 0.073 0.030 0.030 0.050 0.013

Model

208 type 258 type 308 type 408 type 508 type

(2) Correction of cooling and heating capacity in relation to air flow rate control (fan speed)

Coefficient: 1.00 at High, 0.95 at Low

Outdoor air W.B. temperature (˚CW.B.)

Table of bypass factor

ISO-T1 Standard condition

Indoor air W.B. temperature (˚CW.B.)

ISO-T1 Standard condition

Outdoor air D.B.

temperature (˚CD.B.)

Cooling operation

Indoor air D.B.

temperature (˚CD.B.)

Heating operation

Coefficient of cooling and heating capacity

in relation to temperatures

230

FDTN-H

Equivalent piping length

(1)

m 5 10152025303540455055

Heating 1.0 1.0 1.0 1.0 1.0 0.995 0.995 0.99 0.99 0.985 0.985

FDTN, FDT208 type 1.0 0.995 
FDTN, FDT258 type 1.0 0.995 0.99 0.985 0.98 0.975 0.97 

1.0 0.99

0.98 0.97 0.96 0.95 0.94 0.93 0.92 0.91 0.9

1.0

0.995 0.985 0.98 0.97 0.965 0.955 0.95 0.94 0.935 0.925

1.0

0.99 0.975 0.965 0.95 0.94 0.925 0.915 0.9 0.89 0.875

1.0 0.99 

1.0 

1.0 

(3) Correction of cooling and heating capacity in relation to one way length of refrigerant piping

It is necessary to correct the cooling and heating capacity in relation to the one way equivalent piping length between the indoor
and outdoor units.

Note (1) Equivalent piping length can be obtained by calculating as follows.

208, 258, 308 series [φ15.88(5/8″)]: Equivalent piping length = Real piping length + (0.10 × Number or bends in piping)
408, 508, series [φ19.05(3/4″)]: Equivalent piping length = Real piping length + (0.15 × Number of bends in piping)
[Equivalent piping length < Limitation length of piping + 5m]

(4) When the outdoor unit is located at a lower height than the indoor unit in cooling operation and when the outdoor unit is

located at a higher height than the indoor unit in heating operation, the following values should be subtracted from the values in

the above table.

50/60Hz

Height difference between the indoor unit and
outdoor unit in the vertical height difference

5m 10m 15m 20m 25m 30m

Adjustment coefficient 0.01 0.02 0.03 0.04 0.05 0.06

Piping length limitations

Item

Model FDTN, FDT208, 258 FDTN, FDT308~508 FDTN, FDT208~508

Max. one way piping length 30m 50m 30m

Max. vertical height difference

Outdoor unit is higher 20m Outdoor unit is higher 30m

15m

Outdoor unit is lower 15m Outdoor unit is lower 15m

Note (1) Values in the table indicate the one way piping length between the indoor and outdoor units.

How to obtain the cooling and heating capacity

Example : The net cooling capacity of the model FDTN308HEN-S with the air flow “High”, the piping length of 15m, the outdoor unit located

5m lower than the indoor unit, indoor wet-bulb temperature at 19.0 ˚C and outdoor dry-bulb temperature 35 ˚C is
Net cooling capacity = 7100 × 1.00 × (0.98 - 0.01) × 1.0 = 6887 w

Factor by air
temperatures

FDTN308HEN-S Air flow

“High”

Length 15m.
Height difference 5 m

0.995 0.99 0.985 0.985 0.98
/0.99 /0.985 /0.98 /0.975 /0.97

Cooling

FDTN, FDT308 type

(FDC308 type)

FDTN, FDT408 type

(FDC408 type)

FDTN, FDT508 type

(FDC508 type)

FDTN, FDT308 type

(FDC306 type)

FDTN, FDT408 type

(FDC406 type)

FDTN, FDT508 type

(FDC506 type)

0.98 0.97 0.96 0.95 0.94

/0.975 /0.965 /0.95 /0.94 /0.925

0.995 0.985 0.98 0.97 0.965 0.955
/0.99 /0.98 /0.97 /0.96 /0.95 /0.94

0.99 0.975 0.965 0.95 0.94 0.925

/0.985 /0.97 /0.955 /0.94 /0.925 /0.91

(FDC208, 258 type) (FDC308~508 type) (FDC206~506 type)

231

FDTN-H

6.2.7 Noise level

Notes (1) The data are based on the following conditions.

Ambient air temperature:

Indoor unit 27˚C DB, 19˚C WB.
Outdoor unit 35˚C DB.

Indoor unit
Measured based on JIS B 8616

Mike position as below

(2) The data in the chart are measured in an unechonic room.

(3) The noise levels measured in the field are usually higher than the data because of reflection.

(1) Indoor unit

Outdoor unit
Measured based on JIS B 8616

Mike position: at highest noise level

in position as below
Distance from front side 1 m
Height 1 m

Models FDTN208H, FDT208

Noise level 38 dB (A) at HIGH

33 dB (A) at LOW

Models FDTN258H, FDT258

Noise level 39 dB (A) at HIGH

35 dB (A) at LOW

Models FDTN308H, FDT308

Noise level 41 dB (A) at HIGH

35 dB (A) at LOW

Models FDTN408H, FDT408

Noise level 48 dB (A) at HIGH

40 dB (A) at LOW

Models FDTN508H, FDT508

Noise level 49 dB (A) at HIGH

43 dB (A) at LOW

(2) Outdoor unit

Mike (center & low points)

Model FDC206HEN3

Noise level 56 dB (A)

Mid octave band frequency (Hz)

N

30

N20

N

50

N

60

N70

63 125 250 500 1000 2000 4000 8000

20

30

40

50

60

70

20

30

40

50

60

70

N

40

Sound pressure level

(Standard 0.0002µ bar) dB

Mid octave band frequency (Hz)

N

30

N20

N

50

N

60

N

70

63 125 250 500 1000 2000 4000 8000

20

30

40

50

60

70

20

30

40

50

60

70

N40

Sound pressure level

(Standard 0.0002µ bar) dB

Mid octave band frequency (Hz)

N30

N20

N50

N60

N70

63 125 250 500 1000 2000 4000 8000

20

30

40

50

60

70

20

30

40

50

60

70

N40

Sound pressure level

(Standard 0.0002µ bar) dB

Mid octave band frequency (Hz)

N30

N20

N

50

N

60

N

70

63 125 250 500 1000 2000 4000 8000

20

30

40

50

60

70

20

30

40

50

60

70

N

40

Sound pressure level

(Standard 0.0002µ bar) dB

Mid octave band frequency (Hz)

N

30

N20

N

50

N

60

N

70

63 125 250 500 1000 2000 4000 8000

20

30

40

50

60

70

20

30

40

50

60

70

N

40

Sound pressure level

(Standard 0.0002µ bar) dB

Model FDC208HEN3

Noise level 52 dB (A)

Model FDC206HEP3

Noise level 56 dB (A)

Mid octave band frequency (Hz)

N30

N20

N

50

N

60

N70

63 125 250 500 1000 2000 4000 8000

20

30

40

50

60

70

20

30

40

50

60

70

N

40

Sound pressure level

(Standard 0.0002µ bar) dB

Mid octave band frequency (Hz)

N

30

N20

N

50

N

60

N

70

63 125 250 500 1000 2000 4000 8000

20

30

40

50

60

70

20

30

40

50

60

70

N

40

Sound pressure level

(Standard 0.0002µ bar) dB

Mid octave band frequency (Hz)

N30

N20

N50

N60

N

70

63 125 250 500 1000 2000 4000 8000

20

30

40

50

60

70

20

30

40

50

60

70

N40

Sound pressure level

(Standard 0.0002µ bar) dB

232

FDTN-H

Model FDC306HES3

Noise level 56 dB (A)

Model FDC306HEN3

Noise level 56 dB (A)

Souud pressure level

(standard 0.0002µbar)

Mid octave band frequency (Hz)

N

3

0

N20

N

50

N

6

0

N

7

0

63 125 250 500 1000 2000 4000 8000

20

30

40

50

60

70

20

30

40

50

60

70

N

4

0

Model FDC306HEP3

Noise level 56 dB (A)

Mid octave band frequency (Hz)

N

30

N20

N50

N

60

N

70

63 125 250 500 1000 2000 4000 8000

20

30

40

50

60

70

20

30

40

50

60

70

N

40

Sound pressure level

(Standard 0.0002µ bar) dB

Model FDC406HES3

Noise level 57 dB (A)

Model FDC408HES3

Noise level 54 dB (A)

Souud pressure level

(standard 0.0002µbar)

Mid octave band frequency (Hz)

N30

N20

N50

N60

N70

63 125 250 500 1000 2000 4000 8000

20

30

40

50

60

70

20

30

40

50

60

70

N40

Models FDC506HES3, 506HEM3

Noise level 59 dB (A)

Souud pressure level

(standard 0.0002µbar)

Mid octave band frequency (Hz)

N30

N20

N50

N60

N70

63 125 250 500 1000 2000 4000 8000

20

30

40

50

60

70

20

30

40

50

60

70

N40

Model FDC258HEN3

Noise level 52 dB (A)

Mid octave band frequency (Hz)

N

30

N20

N50

N

60

N

70

63 125 250 500 1000 2000 4000 8000

20

30

40

50

60

70

20

30

40

50

60

70

N40

Sound pressure level

(Standard 0.0002µ bar) dB

Souud pressure level

(standard 0.0002µbar)

Mid octave band frequency (Hz)

N30

N20

N50

N60

N70

63 125 250 500 1000 2000 4000 8000

20

30

40

50

60

70

20

30

40

50

60

70

N40

Souud pressure level

(standard 0.0002µbar)

Mid octave band frequency (Hz)

N30

N20

N50

N60

N70

63 125 250 500 1000 2000 4000 8000

20

30

40

50

60

70

20

30

40

50

60

70

N40

Models FDC308HEN3, 308HES3

Noise level 52 dB (A)

Model FDC256HEN3

Noise level 57 dB (A)

Model FDC256HEP3

Noise level 57 dB (A)

Model FDC508HES3

Noise level 55 dB (A)

Mid octave band frequency (Hz)

N

30

N20

N50

N

60

N

70

63 125 250 500 1000 2000 4000 8000

20

30

40

50

60

70

20

30

40

50

60

70

N40

Sound pressure level

(Standard 0.0002µ bar) dB

Mid octave band frequency (Hz)

N

30

N20

N

50

N

60

N

70

63 125 250 500 1000 2000 4000 8000

20

30

40

50

60

70

20

30

40

50

60

70

N4

0

Sound pressure level

(Standard 0.0002µ bar) dB

Souud pressure level

(standard 0.0002µbar)

Mid octave band frequency (Hz)

N

30

N20

N

5

0

N

6

0

N

7

0

63 125 250 500 1000 2000 4000 8000

20

30

40

50

60

70

20

30

40

50

60

70

N

4

0

Souud pressure level

(standard 0.0002µbar)

Mid octave band frequency (Hz)

N

30

N20

N

5

0

N

60

N

7

0

63 125 250 500 1000 2000 4000 8000

20

30

40

50

60

70

20

30

40

50

60

70

N

4

0