Mitsubishi FDTN208HEN-S User 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
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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

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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

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Model FDTN308HEN
Operation data(3)
Item Model FDTN308H FDC306HEN3
Nominal cooling capacity(1) W7100
Nominal heating capacity(1) W7300
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.

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Operation data(3)
Item Model FDTN308H FDC306HES3
Nominal cooling capacity(1) ISO-T1 W7100/7700
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
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Operation data(3)
Item Model FDTN508H FDC506HES3
Nominal cooling capacity(1) ISO-T1 W12500/14000
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.

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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)

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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

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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

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(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
0.3mm
2
, 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
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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
L2
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
L1Open Open 500
L2300 5 Open
L3100 150 100
L4555
Installation
type
Notes
(1) Avoid the location where four sides are entirely
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

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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
L1Open Open 500
L2300 5 Open
L3150 300 150
L4555
Installation
type
Notes
(1) Avoid the location where four sides are entirely
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
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Mark 123
L1Open Open 500
L2300 0 Open
L3100 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

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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
L1Open Open 500
L2300 0 Open
L3150 300 150
Installation
type
Required space for maintenance and air flow
Unit: mm
580
380

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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
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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
Sub-
cooling
coil
Indoor unit Outdoor unit

226
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Thermistor
(ThI-A)
Heat exchanger
Liquid line
(ø9.52)
Strainer Strainer
Compressor
Accumlator
StrainerStrainer
Thermistor
(ThI-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 over-
loading in heating)
Thermistor
(for frost prevention)
Thermistor
(for detecting dis-
charge 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 over-
loading in heating)
Thermistor
(for frost prevention)
Defrost thermostat
High pressure switch
(for controlling FMo)
OFF 68˚C
ON 61˚C
Equipped
unit
THI-R
23DH2
23DH1
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