Daitsu FDHD-V-AC MOTOR Series Manual

FDHD-18R-V
FDHD-24R-V
FDHD-30R-V
FDHD-36R-V
FDHD-48-V
FDHD-60B-V
FDHD-75-V
FDHD-100-V
HIGH PRESSURE DUCT
FDHD
Serie
FDHD-V/P - AC MOTOR
Edition
R00
Models
INSTALLATION AND MAINTENANCE MANUAL
FDHD-18R-P
FDHD-24R-P
FDHD-30R-P
FDHD-36R-P
FDHD-48-P
FDHD-60B-P
FDHD-75-P
FDHD-100-P

Page 1 of 48
SK2019 EU FDHD-V/P-AC-001
INVESTING IN QUALITY, RELIABILITY & PERFORMANCE
ISO 9001 QUALITY
World Leading Design and Technology
Every product is manufactured to meet
the stringent requirements of the
internationally recognized ISO 9001
standard for quality assurance in design,
development and production.
Equipped with the latest air-conditioning test rooms
and manufacturing technology, we produce over
50,000 fan coil units each year, all conforming to the
highest international standards of quality and safety.
CE SAFETY STANDARDS
The Highest Standards of Manufacturing
All products conform to the Certificate
Europe directives (Machinery Safety,
Electromagnetic Compatibility and Low
Voltage), as required throughout the
European Community, to guarantee
correct standards of safety.
In order to guarantee the very highest standards and
performance, we manage every stage in the
manufacturing of our products. Throughout the
production process we maintain strict control,
starting with our extensive resources in research
and development through to the design and
manufacture of almost every individual component,
from molded plastics to the assembly of units and
controllers.
EUROVENT CERTIFICATION
Quality Controlled from Start to Finish
Our highly trained staff and strict quality control
methods enable us to produce products with an
exceptional reputation for reliability and efficiency,
maintained over many years. As well as CE
certification and ISO 9001, several products ranges
have UL / ETL safety approval in the USA and
Canada, Eurovent performance and sound
certification as well as ROHS compliance for Europe,
giving you the confidence of knowing our company
is the right choice when selecting fan coil units.
WEEE MARK
All products conform to the
“WEEE” directive to guarantee
correct standards of
environmental solutions.
ALWAYS MAKE SURE THIS MANUAL REMAINS WITH THE UNIT. READ THIS MANUAL BEFORE PERFORMING ANY OPERATION
ON THE UNIT.

Page 2 of 48
SK2019 EU FDHD-V/P-AC-001
Table of Contents
A. Technical Data ...................................................................................................................................................................5
A.1. General Description ............................................................................................................................................................5
A.2. General Specifications ........................................................................................................................................................6
A.2.1. 2-pipe Systems ...........................................................................................................................................................6
A.2.2. 4-Pipe Systems............................................................................................................................................................7
A.3. Coil Data .............................................................................................................................................................................7
A.4. Sound Power Data..............................................................................................................................................................8
A.5. Dimension Drawings...........................................................................................................................................................9
A.6. Valve Information (Optional)............................................................................................................................................11
A.6.1. On/Off Ball Valve Models .........................................................................................................................................11
A.6.2. Modulating Valve Models.........................................................................................................................................12
B. Installation.......................................................................................................................................................................13
B.1. Safety Precautions............................................................................................................................................................13
B.2. Location ............................................................................................................................................................................14
B.3. Installation Procedures.....................................................................................................................................................14
B.4. Pipes Connection ..............................................................................................................................................................16
B.5. Electrical Connection ........................................................................................................................................................17
C. Maintenance....................................................................................................................................................................19
C.1. General Maintenance .......................................................................................................................................................19
C.2. Regular Maintenance .......................................................................................................................................................19
C.3. Filter Cleaning...................................................................................................................................................................19
C.4. Fan Motor Assembly Maintenance...................................................................................................................................19
D. Control Specifications: Complete Function PCB: AC-S1 ....................................................................................................20
D.1. I/O Port Definitions...........................................................................................................................................................20
D.2. Wiring Diagram................................................................................................................................................................21
D.2.1. Complete Function PCB: AC-S1 ................................................................................................................................21
D.3. Configuration Settings......................................................................................................................................................22
D.3.1. Fan Coil Unit ON/OFF ...............................................................................................................................................23
D.3.2. Auto Restart .............................................................................................................................................................23
D.4. Control Logics for 2-Pipe System ......................................................................................................................................24
D.4.1. With Valve Configuration .........................................................................................................................................24
D.4.2. Without Valve Configuration....................................................................................................................................26
D.5. Control Logics for 4-Pipe System ......................................................................................................................................27
D.6. Sleep Mode.......................................................................................................................................................................29
D.7. Auto Fan Speed ................................................................................................................................................................29
D.8. Buzzer...............................................................................................................................................................................30
D.9. Auto Restart .....................................................................................................................................................................30
D.10. On/Off Switch on LED Display Panel...............................................................................................................................30
D.11. Electric Heater Safety Switch..........................................................................................................................................30
D.12. Low Temperature Protection of Indoor Coil in Winter ...................................................................................................30
D.13. LED Display and Error Description ..................................................................................................................................31
D.14. LED Display on Master/Slave Connection.......................................................................................................................32

Page 3 of 48
SK2019 EU FDHD-V/P-AC-001
D.15. Master-Slave Network....................................................................................................................................................33
D.15.1. Master Unit Control Settings..................................................................................................................................33
D.15.2. Master Slave Network Setup..................................................................................................................................34
D.15.3. Master Slave Communication Method ..................................................................................................................36
D.16. Open Modbus Protocol...................................................................................................................................................37
E. User Interface ..................................................................................................................................................................40
E.1. Remote Handset ...............................................................................................................................................................40
E.2. Wired Wall Pad Controller ................................................................................................................................................41
F. Sensor Resistance R-T Conversion Table...........................................................................................................................45
G. Troubleshooting ..............................................................................................................................................................46
H. Accessories ......................................................................................................................................................................47

Page 4 of 48
SK2019 EU FDHD-V/P-AC-001
Model Code Nomenclature
FDHD
-
18
-
V
S
S
Complete function onboard PCB
with integrated group control
functionality.
T
Terminal strip only.
P
Chilled/Hot Water, 4-Pipe
V
Chilled/Hot Water, 2-Pipe
18-100
Unit Sizes.
See General Specification section A
for cooling and heating capacities
FDHD
High Static Hydronic Ducted Fan
Coil

Page 5 of 48
SK2019 EU FDHD-V/P-AC-001
Technical Data
General Description
The Duct Fan Coil is designed to meet and exceed the demanding requirements for efficiency and quiet operation.
STRUCTURE
Structure is made from electrostatic coating steel panels completed with couplings for the connection of ducting and gravity
drain condensate pan with insulation. Fire resistant insulation is fitted internally to provide both thermal and acoustic
insulation. Insulation is fitted on the top of coil.
COILS
Constructed with seamless copper tubes and headers. The tubes are mechanically expanded into corrugated aluminum fin
material for a permanent primary to secondary surface bond. Coils are tested at 25 bars and recommended for maximum
operating at 16 bars. Coils include manual air vent and water purge valves.
FAN
The forward-curved centrifugal fan is statically and dynamically balanced for quiet operation. Fan impellers are made from
metal.
AC MOTOR
Standard motors are PSC, permanently lubricated type with internal thermal overload protection. The unit is using 3-speed
AC motor.
AIR FILTER
The filter is easily removable and washable and is made from self-extinguishing acrylic with a class EU2 (G2) (Merv 2-4)
efficiency rating. G4 or F8 (Merv 8, 14) efficiency filter is optional.
DRAIN PAN
The drain pan fits a drain pipe of Ø 21mm (on both left and right side of drain pan) and is with fire resistant insulation.
Complete Function Control (AC-S1 type)
The PCB (printed circuit board) Modbus microprocessor controls functionality of the indoor fan motor, water valves
(ON/OFF) and electric heater (optional), to maintain room conditions at a user-defined set point. Temperature settings, fan
speeds and other control functions can be changed by either infrared handset or wired wall pad controller.
Terminal Strip (T1 type)
A 230Vac relays board is used to drive 3-speed AC motor. 40VA (24Vac) transformer is optional which supplies power to
thermostat and modulating valve.
Terminal Strip (T2 type)
A 24Vac relays board is used to drive 3-speed AC motor. 40VA (24Vac) transformer is optional which supplies power to
thermostat and modulating valve.
Casing with insulation internal
Coil with insulation on the top
Filter
Fan deck
Control box

Page 6 of 48
SK2019 EU FDHD-V/P-AC-001
General Specifications
A.2.1. 2-pipe Systems
Product range: FDHD High Static Hydronic Ducted Fan Coil
FDHD-V~ Hydronic Ducted 2-pipe Unit with AC motor
FDHD-[Size]-V~
18R
24B
30R
36B
48
60B
75
100
Unit
Configuration
Configuration
2-pipe
Number Of Fan Blowers
Signal
Twin
Power Supply (V/Ph/Hz)
230 / 1 / 50
220 / 1 / 60
Operation Control
~S: Complete function onboard PCB with integrated group control functionality.
~T: Terminal strip only.
Performance Data
Air
Air Flow
H
m3/hr
1020
1500
1900
2150
2880
3180
3500
4361
M
920
1360
1700
1950
2680
2880
3100
4050
L
770
1200
1450
1700
2270
2400
2600
3688
Available pressure
H
Pa
60
60
60
60
58
60
62
72
M
50
50
50
50
50
50
50
50
L
35
35
35
35
35
35
35
42
Cooling
Cooling Capacitye
H
kW
4.26
6.86
8.15
11.24
13.4
17.18
18.19
22.34
M
3.99
6.38
7.53
10.4
12.7
15.98
16.6
21.2
L
3.48
5.8
6.68
9.43
11.2
13.74
14.52
19.73
Sensible Cooling
Capacitye
H
3.37
5.19
6.25
8.32
9.8
12.7
13.8
16.99
M
3.11
4.8
5.73
7.69
9.26
11.7
12.5
16.06
L
2.7
4.35
5.05
6.87
8.12
10.1
10.8
14.83
Latent Cooling
Capacity
H
0.89
1.67
1.9
2.92
3.6
4.48
4.39
5.35
M
0.88
1.58
1.8
2.71
3.44
4.28
4.1
5.14
L
0.78
1.45
1.63
2.56
3.08
3.64
3.72
4.9
FCEERe
Rating
17
25.2
27.1
24.7
23.5
30.6
27.7
25.4
Class
E
D
D
E
E
D
D
D
Heating
Heating Capacitye
H
kW
4.87
7.28
8.72
11.2
16.2
16.84
18.53
22.99
M
4.51
6.72
8
10.25
15.3
15.62
16.97
21.85
L
3.92
6.16
7.12
9.24
13.4
13.63
14.66
20.22
FCCOPe
Rating
18.2
26.6
28.8
24.7
25.2
30.2
28.4
26.3
Class
E
D
D
E
D
D
D
D
Sound
Sound Pressure Level (Outlet)
d(BA)
56/53/51
53/50/45
57/53/47
60/57/54
64/60/56
64/61/57
65/59/54
66/63/60
Sound Pressure Level
(Inlet + Radiated)
56/53/51
53/50/45
57/53/47
60/57/54
64/60/56
64/61/57
65/59/54
66/63/60
Sound Power Level (Outlet)e
65/62/60
64/62/58
67/64/61
72/70/67
73/69/63
69/67/64
71/68/65
75/72/69
Sound Power Level
(Inlet + Radiated)
65/62/60
64/62/59
67/64/61
72/70/67
73/68/66
72/70/67
74/71/68
75/72/69
Electrical
Fan Motor Power
H
W
300
308
380
476
570
625
813
988
M
232
261
310
418
450
520
600
885
L
203
222
260
389
395
464
483
745
Fan Motor Running Current @ H
A
1.12
1.35
1.5
2.05
2.61
2.66
3.84
4.3
Fan Motor Starting Current @ H
3.35
4.04
4.51
6.14
7.84
7.97
11.53
12.89
Hydraulic
Cooling Water Flow
Rate
H
L/h
735
1160
1400
1910
2175
2922
3022
3830
M
672
1093
1292
1749
2064
2694
2848
3634
L
581
990
1135
1542
1820
2354
2470
3381
Cooling Pressure Drope
H
kPa
13.3
13.8
18.9
43.1
43.8
36.3
12.9
22.6
M
11.7
12.1
16.3
37.7
34.8
31.7
10.9
20.67
L
9.3
10.3
13.2
31.2
27.9
24.6
8.6
18.28
Heating Water Flow
Rate
H
L/h
788
1227
1478
1917
2350
2887
3075
3942
M
722
1151
1365
1758
2225
2659
2909
3746
L
624
1041
1206
1546
1957
2317
2513
3466
Heating Pressure
Drope
H
kPa
14.6
13.6
18.8
38.6
41
31.7
11.9
15.91
M
12.7
11.8
16.1
33.2
32.6
27.6
10.1
14.59
L
10
10.2
13.1
27.3
26.2
21.9
7.9
12.78
Water Content
L
1.1
1.92
1.92
2.56
3.37
4.49
5.14
6.34
Construction
and Packing
Data
Water Connections
Type
Threaded Male
In
in
3/4
1
Out
Condensate Drainage Connection
3/4
Dimensions
L
mm
710
1110
1110
1110
1460
1460
1460
1760
W
630
630
630
630
650
650
750
750
H
300
300
300
300
380
380
430
430
Net Weight
kg
33
45
46
50
56
60
65
75
"e": Above specifications are based on declared Eurovent test data for the year of publication of this document. To confirm the most updated specifications,
please visit www.eurovent-certification.com.
Eurovent testing conditions:
a. Cooling mode:
b. Heating mode:
- Return air temperature: 27C DB/ 19C WB.
- Return air temperature: 20C.
- Inlet/ outlet water temperature: 7C/ 12C.
- Inlet/ Outlet water temperature: 45C/ 40C.

Page 7 of 48
SK2019 EU FDHD-V/P-AC-001
A.2.2. 4-Pipe Systems
Product range: FDHD High Static Hydronic Ducted Fan Coil
FDHD-P~ High Static Hydronic Ducted Unit 4-pipe with 1-row Auxiliary Heating Coil and AC motor
Non-standard configuration
FDHD-[Size]-P~
18R
24B
30R
36B
48
60B
75
100
Performance Data
Heating
Heating
Capacity
H
kW
3.46
5.29
6.41
7.15
10.23
11.08
11.83
15.12
M
3.16
4.97
5.93
6.56
9.68
10.23
11.2
14.31
L
2.73
4.47
5.21
5.81
8.53
8.95
9.67
13.35
FCCOP
Rating
13.7
19.6
21.4
15.9
18.8
19.9
18.7
17.3
Class
E
E
E
E
E
E
E
E
Hydraulic
Heating
Water
Flow Rate
H
L/h
297
453
550
613
877
950
1014
1296
M
271
426
508
562
830
877
960
1227
L
234
383
446
498
731
767
829
1144
Heating
Pressure
Drop
H
kPa
3.93
12.24
16.98
20.43
20.99
24.08
14.05
25.76
M
3.36
11.01
14.86
17.66
19.12
20.99
12.8
23.47
L
2.62
9.18
11.93
14.36
15.43
16.73
9.97
20.86
Water
Content
Hot
Water
L
0.37
0.638
0.638
0.638
1.12
1.12
1.29
1.59
Heating mode (4-pipe):
- Return air temperature: 20C.
- Inlet/ outlet water temperature: 65C/ 55C.
Coil Data
2-Pipe System
Model
Fin height
(mm)
Fin Length
(mm)
Fins per
Inch
No. of
Rows
Fin width
(mm)
No. of
Circuits
Tube Ø
(mm)
FDHD-18R-V
275
534
12.7
3
64.95
4
9.52
FDHD-24R-V
275
934
12.7
3
64.95
6
FDHD-30R-V
275
934
12.7
3
64.95
6
FDHD-36R-V
275
934
12.7
4
86.6
6
FDHD-48-V
350
1284
12.7
3
64.95
10
FDHD-60B-V
350
1284
12.7
4
86.6
10
FDHD-75-V
400
1284
12.7
4
86.6
16
FDHD-100-V
400
1584
12.7
4
86.6
16
4-Pipe System Auxiliary Heating Coil (1-row)
Model
Fin height
(mm)
Fin Length
(mm)
Fins per
Inch
No. of
Rows
Fin width
(mm)
No. of
Circuits
Tube Ø
(mm)
FDHD-18R-P
275
534
12.7
1
21.65
2
9.52
FDHD-24R-P
275
934
12.7
1
21.65
2
FDHD-30R-P
275
934
12.7
1
21.65
2
FDHD-36R-P
275
934
12.7
1
21.65
2
FDHD-48-P
350
1284
12.7
1
21.65
3
FDHD-60B-P
350
1284
12.7
1
21.65
3
FDHD-75-P
400
1284
12.7
1
21.65
4
FDHD-100-P
400
1584
12.7
1
21.65
4

Page 8 of 48
SK2019 EU FDHD-V/P-AC-001
Sound Power Data
Model
FDHD-18R
FDHD-24B
FDHD-30R
FDHD-36B
speed
H
M
L
H
M
L
H
M
L
H
M
L
Sound Power dB(A)
62.5
60.9
59.9
60.2
57.5
55.4
63.3
61.1
56.4
68.4
64.6
63.3
Sound Power in 1/3 Octave-bands under rated ESP (dB)
20.0 Hz
20.4
16.9
19.1
20.7
18.7
13.8
16.9
16.7
12.0
15.2
14.6
16.1
25.0 Hz
14.8
16.1
12.6
19.5
16.9
17.1
18.0
17.9
14.7
18.4
19.0
18.2
31.5 Hz
20.1
15.3
20.1
13.7
18.7
17.2
17.0
19.5
15.4
22.4
20.2
19.6
40.0 Hz
21.5
18.7
18.3
20.6
17.8
12.6
23.8
20.8
14.5
29.1
23.8
22.5
50.0 Hz
18.7
22.0
18.4
24.5
22.5
16.7
25.9
23.1
18.4
29.2
23.8
26.0
63.0 Hz
29.7
27.5
28.3
27.2
26.4
22.8
29.2
30.1
22.8
33.1
33.8
28.7
80.0 Hz
33.8
30.7
28.5
31.2
24.8
23.5
32.2
29.2
25.1
35.3
33.5
32.6
100.0 Hz
40.9
42.1
42.8
35.7
31.5
32.1
37.1
35.3
32.7
40.6
39.0
39.3
125.0 Hz
48.1
46.1
43.2
44.1
42.2
42.2
45.0
43.3
42.1
47.9
44.5
47.9
160.0 Hz
48.3
47.7
46.7
51.9
44.1
41.1
51.1
47.5
41.6
52.3
50.8
48.1
200.0 Hz
49.1
45.6
46.4
46.7
43.9
41.1
50.5
48.2
44.0
56.4
52.6
52.8
250.0 Hz
44.8
42.5
42.7
44.6
41.2
37.4
47.6
45.2
39.0
52.6
49.2
46.7
315.0 Hz
51.2
50.7
49.2
48.6
44.0
42.2
51.5
48.6
44.0
56.3
53.3
51.8
400.0 Hz
49.9
48.9
49.4
47.1
43.5
41.3
49.5
47.9
42.7
54.0
52.3
50.1
500.0 Hz
51.4
51.3
49.1
48.4
47.1
44.9
50.7
50.4
45.2
55.0
53.7
51.4
630.0 Hz
48.0
48.1
45.6
47.9
46.0
44.5
50.6
49.1
44.4
55.3
52.1
50.3
800.0 Hz
56.8
52.9
52.1
52.7
49.5
47.8
55.2
53.2
49.1
59.7
57.0
56.4
1000.0 Hz
51.9
49.8
48.9
51.7
48.5
47.4
55.1
51.5
47.5
60.5
54.5
53.7
1250.0 Hz
50.9
49.7
49.4
50.8
48.1
44.8
53.7
51.7
46.5
58.6
55.4
54.1
1600.0 Hz
51.4
50.4
48.6
49.3
45.8
43.6
52.3
49.6
45.1
57.4
53.4
52.7
2000.0 Hz
50.0
48.4
46.8
47.5
44.1
41.9
50.0
47.6
42.8
54.6
51.0
49.6
2500.0 Hz
46.9
45.6
43.9
45.3
41.6
39.3
48.2
45.3
40.4
53.0
49.0
47.6
3150.0 Hz
45.3
44.0
42.1
43.7
40.3
37.9
46.8
44.1
39.3
52.0
47.9
46.6
4000.0 Hz
44.6
43.7
42.0
42.3
39.3
36.8
45.7
43.1
38.1
51.0
46.9
45.4
5000.0 Hz
41.7
40.4
38.5
40.6
36.3
34.4
44.0
40.9
36.2
49.5
45.4
44.0
6300.0 Hz
38.8
37.0
35.7
37.1
33.7
30.9
40.2
37.7
32.6
45.4
41.6
40.3
8000.0 Hz
35.4
34.3
32.9
34.1
30.4
27.6
36.6
33.9
28.6
41.2
37.3
35.6
10000.0 Hz
34.4
33.1
31.8
31.5
27.3
24.4
35.3
32.4
27.1
41.1
37.5
35.7
12500.0 Hz
28.3
27.3
25.3
24.1
19.8
16.9
28.8
25.7
20.4
35.4
31.6
29.9
16000.0 Hz
17.6
16.0
14.4
13.7
10.3
8.6
17.8
14.9
10.4
23.9
19.5
18.2
Model
FDHD-48
FDHD-60B
FDHD-75
FDHD-100
speed
H
M
L
H
M
L
H
M
L
H
M
L
Sound Power dB(A)
68.6
63.4
61.2
69.8
66.7
64.7
67.2
61.0
56.7
69.3
66.9
63.6
Sound Power in 1/3 Octave-bands under rated ESP (dB)
20.0 Hz
22.6
16.6
22.9
22.2
27.6
20.7
25.5
17.5
16.8
27.1
23.0
25.3
25.0 Hz
24.7
14.4
12.8
23.9
22.0
22.7
19.5
20.0
22.1
27.9
25.5
22.4
31.5 Hz
30.7
21.3
18.1
26.2
17.4
22.6
19.2
14.0
20.8
33.5
28.3
26.6
40.0 Hz
27.6
20.7
18.2
24.1
25.8
23.4
25.4
27.2
17.9
32.2
24.2
24.2
50.0 Hz
31.5
27.1
26.9
36.4
29.5
30.8
34.4
20.8
20.9
35.0
29.0
26.8
63.0 Hz
38.6
36.8
33.3
38.9
38.9
36.9
47.0
29.0
30.8
42.8
35.8
37.7
80.0 Hz
44.4
36.6
35.8
43.3
40.7
38.6
40.7
40.3
35.6
46.6
40.7
40.2
100.0 Hz
45.2
42.5
44.2
47.5
44.3
45.0
48.4
44.6
42.8
52.1
50.3
48.8
125.0 Hz
52.2
51.9
49.7
53.8
53.0
48.0
54.4
48.8
44.7
56.1
53.4
52.5
160.0 Hz
58.6
53.3
51.8
59.4
56.1
54.3
56.2
51.5
47.4
58.1
54.5
53.4
200.0 Hz
55.4
52.1
50.3
59.0
54.9
54.1
56.2
48.6
43.1
56.5
54.4
50.3
250.0 Hz
55.0
49.8
47.5
54.4
51.9
49.2
54.8
47.0
44.2
57.4
55.8
49.7
315.0 Hz
57.7
51.4
49.6
59.7
56.0
54.8
56.3
49.5
43.8
58.6
55.1
51.1
400.0 Hz
59.6
53.1
50.5
59.5
57.2
55.1
53.7
47.4
45.1
55.5
53.1
48.3
500.0 Hz
52.7
48.3
46.8
56.1
54.5
50.9
52.2
47.2
44.2
55.2
51.7
49.7
630.0 Hz
54.2
49.9
48.8
56.3
54.5
52.1
57.0
52.6
49.0
58.1
56.0
55.0
800.0 Hz
56.0
51.6
50.1
57.5
56.0
54.6
56.3
50.9
46.6
57.3
54.6
51.6
1000.0 Hz
57.3
51.9
50.1
57.8
56.5
53.6
54.4
48.6
45.3
57.4
54.5
51.6
1250.0 Hz
57.5
52.4
51.1
57.6
55.0
53.0
55.7
48.9
44.5
58.6
56.2
52.2
1600.0 Hz
57.5
51.8
48.9
56.9
54.7
51.7
55.0
48.6
44.1
57.6
55.1
51.1
2000.0 Hz
55.1
50.0
46.6
56.5
53.8
51.4
53.8
46.8
42.7
57.1
53.9
49.9
2500.0 Hz
54.5
49.2
46.6
55.8
52.9
50.3
53.0
45.6
41.8
57.3
54.2
50.1
3150.0 Hz
54.9
49.0
46.0
55.2
52.4
49.4
51.7
44.6
39.6
56.4
53.1
48.9
4000.0 Hz
52.4
47.3
43.9
53.7
50.6
47.2
49.7
42.2
37.2
53.9
50.9
46.3
5000.0 Hz
49.5
44.2
41.1
51.5
48.0
44.8
48.4
40.2
35.3
52.2
48.5
44.6
6300.0 Hz
47.4
41.8
38.9
47.1
44.1
40.8
44.9
36.8
30.3
48.5
44.7
41.3
8000.0 Hz
44.4
39.2
35.8
42.5
39.4
36.0
41.7
31.5
25.5
44.6
41.6
37.0
10000.0 Hz
43.5
37.6
33.7
42.2
39.0
34.5
37.6
27.9
22.0
43.2
38.8
33.4
12500.0 Hz
36.3
29.9
26.2
36.7
32.8
28.9
30.4
20.7
15.3
36.4
31.4
26.1
16000.0 Hz
24.5
18.1
14.5
25.5
21.4
17.9
20.4
11.3
9.0
24.1
19.7
15.2

Page 9 of 48
SK2019 EU FDHD-V/P-AC-001
Dimension Drawings
Dimensions for FDHD-V (2-pipe)
Model
A
B
C
D
E
F
G
H
FDHD-18-V
710
642
680
475
630
60
φ14
300
FDHD-24,30,36-V
1110
1042
1080
475
630
60
φ14
300
FDHD-48,60-V
1460
1392
1430
495
650
60
φ14
380
FDHD-75-V
1460
1392
1430
595
750
70
φ14
430
FDHD-100-V
1760
1692
1730
595
750
70
φ14
430
Model
I
J
K
L
X
Y
R
(Inch)
FDHD-18-V
240
30
40
50
65
150
3/4"
FDHD-24,30,36-V
240
30
40
50
65
150
3/4"
FDHD-48,60-V
320
30
40
50
65
225
3/4"
FDHD-75-V
370
30
40
50
65
275
1"
FDHD-100-V
370
30
40
50
65
275
1"
(All dimensions shown in mm)

Page 10 of 48
SK2019 EU FDHD-V/P-AC-001
Dimensions for FDHD-P (4-pipe)
Model
A
B
C
D
E
F
G
H
I
FDHD-18-P
710
642
680
475
630
60
φ14
300
240
FDHD-24,30,36-P
1110
1042
1080
475
630
60
φ14
300
240
FDHD-48,60-P
1460
1392
1430
495
650
60
φ14
380
320
FDHD-75-P
1460
1392
30
595
750
70
φ14
430
370
FDHD-100-P
1760
1692
1730
595
750
70
φ14
430
370
Model
J
K
L
X
Y
V
W
P
R
(Inch)
FDHD-18-P
30
40
50
65
150
22
80
22
3/4"
FDHD-24,30,36-P
30
40
50
65
150
22
80
22
3/4"
FDHD-48,60-P
30
40
50
65
225
22
150
22
3/4"
FDHD-75-P
30
40
50
65
275
22
200
22
1"
FDHD-100-P
30
40
50
65
275
22
200
22
1"
(All dimensions shown in mm)

Page 11 of 48
SK2019 EU FDHD-V/P-AC-001
Valve Information (Optional)
A.6.1. On/Off Ball Valve Models
Model Definitions
1. 3-way ball valve with 3/4” connectors and on/ off motorized actuator
2. 2-way ball valve with 3/4” connectors and on/ off motorized actuator
3. 3-way ball valve with 1” connectors and on/ off motorized actuator
4. 2-way ball valve with 1” connectors and on/ off motorized actuator
Specifications
Medium: Cool/Hot water or 60% glycol
Structure: Two way or Three way
Operating Mode: On/Off
Power Supply: AC220V
Power Consumption: 6W (during valve position change)
Running Times: 15 sec.
Pressure Rating: 2MPa
Media Temp. Range: 34°F to 203°F (1°C to 95°C)
Max. Differential Pressure: 1MPa
Body: Forged brass, nickel plated
Ball: Chrome plated brass
Stem: Brass
Seats: Fiberglass reinforced Teflon PTFE
Seal: 2 EPDM O-rings, lubricated
Protection Grade: IP65
Dimensions
Caliber
Inch (mm)
Kv Value
L
L1
H
3/4" (DN20)
7.50
66
33
36
1" (DN25)
13.02
88
44
40
(All dimensions shown in mm)

Page 12 of 48
SK2019 EU FDHD-V/P-AC-001
A.6.2. Modulating Valve Models
Model Definitions
1. 3/4" inch 2-way modulating valve and 24VAC actuator with 0-10VDC input
2. 3/4" inch 3-way modulating valve and 24VAC actuator with 0-10VDC input
3. 1" inch 2-way modulating valve and 24VAC actuator with 0-10VDC input
4. 1" inch 3-way modulating valve and 24VAC actuator with 0-10VDC input which is used with unit~S2/W2
Specifications
24VAC power supply
0~10VDC control signal
Bi-directional modulating proportional control
Working media: cool/hot water or with 60% glycol
Media Temp. Range: 34°F to 203°F (1°C to 95°C)
Rating pressure: 2.0MPa
Max. Differential Pressure: 0.3MPa
Opening or closing time: 50 sec.(50Hz), 40 sec.(60Hz)
Connection: NPT internal thread
Dimensions
Size
Type
Kv Value
Dimension
C
D
E
F
G
3/4”(DN20)
2-way
4.6
115
73
67
89
90
3/4”(DN20)
3-way
6.8
127
73
67
89
90
1”(DN20)
2-way
4.6
117
73
67
93
90
1”(DN20)
3-way
5.7
139
73
67
93
90
(All dimensions shown in mm)

Page 13 of 48
SK2019 EU FDHD-V/P-AC-001
Installation
Safety Precautions
•When installing, performing maintenance or servicing Polar Air fan coil units observe the precautions stated in this
manual as well as those stated on the labels attached to the unit.
•Ensure all local and national safety codes, laws, regulations, as well as general electrical and mechanical safety
guidelines are followed for installation, maintenance and service.
•The appliance is for indoor use only.
•Ensure the correct power supply is provided.
•If the power supply cord is damaged, it must be replaced by qualified personnel.
•Installing and servicing fan coil unit should be performed by qualified service personnel only.
•This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental
capabilities, or persons lacking in experience and knowledge of the appliance, unless they have been given supervision
or instruction concerning it.
•User of this appliance is responsible for his/her own safety.
•Warranty shall be voided if installation instructions and safety precaution stated in this manual are not observed.
•The unit should only be switched off by using the ON-OFF button on the control interface.
CAUTIONS
Before any service or maintenance operations turn off the mains electrical supply.
DO NOT turn OFF the main power supply when the unit is operating. Turn off the unit BEFORE
turning off the main power

Page 14 of 48
SK2019 EU FDHD-V/P-AC-001
Location
Before installing and running the unit, please check the following:
1. There must be enough space for unit installation and maintenance. Please refer to below figure for the unit's outlines
and dimensions and for the minimum distance between the unit and the obstacle/ any obstructions/ its surroundings.
2. Please ensure there is enough space for piping connections and electrical wiring.
3. Check whether the hanging rods can support the weight of the unit (see specification table for weight of the unit).
4. The unit must be installed horizontally to ensure proper operation and condensate draining.
5. The external static pressure of the ducting must be within the unit’s static pressure range.
6. Confirm that the unit has been switched OFF before installing or servicing the unit.
B
>200mm
->600mm
_
CEILLING
DRAIN PIPE
Installation Procedures
1. The unit is designed to be installed in a concealed ceiling. Installation and maintenance should be performed by
qualified personnel who are familiar with local codes and regulations, and are experienced with this type of appliance.
2. Please refer to the pictures below for installation procedures.
Counternut
Washer
NUT
Rod
Nut
50

Page 15 of 48
SK2019 EU FDHD-V/P-AC-001
B
CEILLING
DRAIN PIPE
>200mm
-
>600mm
_
H2
H1
H1>1
2*ESPmax/9.81
H2>ESPmax/9.81
L
>300mm
-
N
M
DISCHARGE AIR RETURN AIR
CEILLING ACCESS PANEL
WITH AIR RETRUN
CAUTION
Make sure the top of the unit is level after installation. The drain pan is designed with a slight gradient
to facilitate drainage.
CAUTIONS
Dimension M and N are determined by air duct design.
Air duct should be fire-proof. Please refer to concerned country national and local regulation.
Circulatory air pressure drop should be approximately equal to the External Static Pressure.

Page 16 of 48
SK2019 EU FDHD-V/P-AC-001
Pipes Connection
Main Pipes Connection
Check if the diameter of the water pipes is adequate for the actual length of the piping and not less than the diameter
of the connection on the unit.
When connecting the water pipes to the coil, do not damage the coil manifold.
Hold the coil connections firm with spanner to avoid damaging them.
Condensate Water Pipe Connection
The unit is fitted with a gravity drainage condensate drain pan with an open connection at the back.
The pipe should have an internal diameter of at least 16 mm.
The drain connection has an external diameter of 18 mm.
Connect the condensate drain hose to the pan outlet with a hose clip.
Make sure the drain pipe has a slope of at least 2 cm/m without obstructions or bottlenecks.
Fit a siphon if necessary which prevents air being sucked up by the drain hose.
Connect the condensate drain pipe to a rainwater drainage system.
Do not connect to the sewage system as odors may be sucked up if the water in the siphon evaporates.
Pour water into the pan and check if any leakage.
Air Purging
After connecting the water inlet and outlet pipes, turn on the main breaker.
Open the water inlet valve and flood the coil.
Check all connections for water leakage.
If no leakage, open the air vent valve with an open-end wrench.
Purge the air trapped inside the coil. (Do not touch the electrical parts.)
Close the air vent valve when no bubbles appear.
Open the water outlet valve.
Caution
Gravity drainage may be converted into forced drainage by fitting the condensate drain pump available
as an accessory.

Page 17 of 48
SK2019 EU FDHD-V/P-AC-001
Electrical Connection
1. Wiring connection must be done according to the wiring diagram on the unit.
2. The unit must be GROUNDED well.
3. An appropriate strain relief device must be used to attach the power wires to the terminal box.
4. Field wiring must be complied with the national security regulations.
5. A main switch or other means for disconnection, having a contact separation in all poles, must be incorporated in the
fixed wiring in accordance with the relevant local and national legislation.
*S Control Wiring Diagram: Please refer to section D.
T1 Wiring Diagram for 230VAC Input Signal:
LOW
HIGH
MED
MN
RELAY
RELAY
RELAY
Fan control
FUSE
Fuse
EH element
Protection switch
L N Hi M Lo V1 V2 N
Neutral
Heating signal (230V)
Cooling valve signal(230V)
L-speed signal (230V)
M-speed signal (230V)
H-speed signal (230V)
1Ph-230V-50Hz Power input
Earth
Yellow (H)
Brown (M)
Orange (L)
Neutral
TR kit is optional.
Live
Protection switch
Fuse
EH element
Protection switch
Fuse
EH element
Protection switch
CONTROL
LOAD
LOAD LOAD
L1 L2 L3 N
380~400V
3Ph
50/60Hz
3-speed unit with 3 Ph EH Wiring scheme
24Vac
12Vac
COM
IPA18-DL-T-R230V-003

Page 18 of 48
SK2019 EU FDHD-V/P-AC-001
T2 Wiring Diagram for 24VAC Input Signal:
Remark: 40VA (24Vac) transformer is optional.
L N Hi M Lo V1 V2 C R1 R
Heating signal (24V ac)
Cooling valve signa l(24V ac)
L-speed signal (24Vac)
M -sp eed signal (24Vac)
H-speed signal (24V ac)
Earth
Yellow (H )
Brown (M )
O range (L)
3-speed unit w ith EH W iring schem e
L O W
HIG H
M E D
MN
RE L A Y
RE L A Y
RE L A Y
Fan c o n tro l
FU S E
C O M
Fuse
EH elem ent
Protection sw itch
Protection switch
Fuse
EH elem ent
Protection sw itch
Fuse
EH elem ent
Protection sw itch
CONTROL
LOAD
LOAD LOAD
L1 L2 L3 N
380~400V
3Ph
50/60H z
N e ut ra l
Live
TR k it is o ptio nal.
IP A 18-DL-T24V-002
24Vac for thermostat
12Vac for thermostat

Page 19 of 48
SK2019 EU FDHD-V/P-AC-001
Maintenance
General Maintenance
1. Installation and maintenance should be performed by qualified personnel who are familiar with local codes and
regulations, and are also experienced with this type of appliance.
2. Confirm that the unit has been switched OFF before installing or servicing the unit.
3. A good general maintenance plan will prevent damage to and unexpected shutting down of the equipment.
4. Dirty filters reduce air flow as well as unit performance. Therefore, changing or cleaning the filters is very important. Check
the cleanliness of the filter and replace or clean as required monthly.
5. Coils should be cleaned with compressed air or water to remove dust, dirt or lint. They can be brushed with a soft brush
or vacuumed with a vacuum cleaner.
6. If the water coil is not being used during the winter season it should be drained, or an anti-freezing solution should be
added to the water circuit to avoid freezing.
Regular Maintenance
1. Inspect and clean the condensate drain pan to avoid any clogging of the drain by dirt, dust, etc. Inspect drainage piping to
ensure the proper condensate flow.
2. Check and clean the coil. Clean the coils with low-pressure water jets or low-pressure air.
3. Clean and tighten all the wiring connections.
4. Drain out the water system and check for buildup of mineral deposits.
Filter Cleaning
1. Remove the filter from bottom or side.
2. Clean the filter with a brush, or with water.
3. Reinstall the filter by sliding it back into the groove.
Fan Motor Assembly Maintenance
1. Remove the screws from the bottom panel.
2. Remove the 4 screws on both side.
3. Pull out the fan motor assembly.
4. Reinstall it to the casing after maintenance