d2itsu FCSD 1V EC FLEX Series Manual

FCSD 1V-01-EC
FCSD 1V-02-EC
CASSETTE 1 WAY
FCSD 1V - EC MOTOR
Serie
FCSD 1V EC FLEX
Edition
R00
Models
INSTALLATION AND MAINTENANCE MANUAL

Page 1 of 61
SK2019 FCSD 1V-01-EC-001_1
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.
WEEE MARK
Quality Controlled from Start to Finish
All products conform to the “WEEE”
directive to guarantee correct standards
of environmental solutions.
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.
ALWAYS MAKE SURE THIS MANUAL REMAINS WITH THE UNIT. READ THIS MANUAL BEFORE PERFORMING ANY OPERATION ON
THE UNIT.

Page 2 of 61
SK2019 FCSD 1V-01-EC-001_1
Table of Contents
Technical Data......................................................................................................................................................................5
General Description........................................................................................................................................................ 5
General Specifications.................................................................................................................................................... 6
Coil Data ........................................................................................................................................................................ 7
Dimension Drawings ...................................................................................................................................................... 7
Sound power data.......................................................................................................................................................... 8
Valve Information (Optional parts)............................................................................................................................... 10
Installation .........................................................................................................................................................................12
Safety Precautions........................................................................................................................................................ 12
Standard Configurations and Accessories ..................................................................................................................... 13
Operating Limits...........................................................................................................................................................13
Before Installation........................................................................................................................................................14
Installation Location..................................................................................................................................................... 15
Ceiling Clearance.......................................................................................................................................................... 16
Condensate Drainage Connection................................................................................................................................. 16
Water Connections and Valve Configurations ............................................................................................................... 17
Suspension Bolts Layout and Ceiling Opening ............................................................................................................... 18
Electrical Connection ..................................................................................................................................................20
Mounting Front Panel Assembly ................................................................................................................................. 21
Start-Up .....................................................................................................................................................................21
Maintenance ......................................................................................................................................................................22
For Units Out Of Use for Extended Period. ....................................................................................................................22
Extra Maintenance ....................................................................................................................................................... 22
Air Vent and Water Purge............................................................................................................................................. 23
Control PCB Replacement ............................................................................................................................................. 23
Motor or Drain Pump Replacement .............................................................................................................................. 24
Control Specifications: Complete Control PCB – EC-TOTAL Type Control............................................................................25
I/O Port Definitions ......................................................................................................................................................25
Wiring Diagrams.......................................................................................................................................................... 26
EC-TOTAL Type Control PCB ...................................................................................................................................26
Master Slave Networking Wiring Diagram ................................................................................................................ 27
Configuration Settings.................................................................................................................................................. 28
Fan Coil Unit ON/OFF ............................................................................................................................................29
Auto Restart..........................................................................................................................................................29
Control Logic For 2-Pipe System....................................................................................................................................30
With Valve Configuration.......................................................................................................................................30
Without Valve Configuration .................................................................................................................................33
Control Logic For 4-Pipe System....................................................................................................................................35
Sleep Mode..................................................................................................................................................................37
Auto Fan Speed ............................................................................................................................................................ 37

Page 3 of 61
SK2019 FCSD 1V-01-EC-001_1
Modulating Valve Control Under Energy Saving Mode ................................................................................................. 37
Louver.......................................................................................................................................................................... 38
Buzzer ........................................................................................................................................................................ 38
Auto Restart...............................................................................................................................................................38
On/Off Switch On LED Display .................................................................................................................................... 38
Drain Pump................................................................................................................................................................ 38
Float Switch ............................................................................................................................................................... 39
Electric Heater Safety Switch......................................................................................................................................39
Low Temperature Protection of Indoor Coil in Winter ................................................................................................. 39
LED Display and Error Description .............................................................................................................................. 40
LED Display on Master/Slave connection....................................................................................................................41
Networking System ............................................................................................................................................................42
Master-Slave Network ..................................................................................................................................................42
Master Control Unit Settings..................................................................................................................................42
Master-Slave Network Setup ................................................................................................................................. 43
Master-Slave Communication Method...................................................................................................................45
Open Modbus protocol................................................................................................................................................. 46
Control Specifications: Flexible Function PCB – FLEXI Type Control.....................................................................................49
Features........................................................................................................................................................................49
I/O Port Definitions .......................................................................................................................................................49
Onboard configuration.................................................................................................................................................. 49
Wiring Diagram ............................................................................................................................................................50
EC-FLEXI Type Control ............................................................................................................................................50
Control Logic Specification ............................................................................................................................................ 51
Unit Power ON/OFF ...............................................................................................................................................51
Alarm Protection and Error Display ........................................................................................................................51
Drain Pump Operation ...........................................................................................................................................51
Louver Control .......................................................................................................................................................51
Modulating Signal Input .........................................................................................................................................51
Electrical Heater Operation ....................................................................................................................................52
Low Temperature Protection of Indoor Coil in Winter ............................................................................................52
LED Display and Error Description ................................................................................................................................. 53
User Interface ....................................................................................................................................................................54
Remote Handset ..........................................................................................................................................................54
Wired Wall Pad Controller............................................................................................................................................55
Sensor Resistance R-T Conversion Table ............................................................................................................................59
Troubleshooting ..................................................................................................................................................................61

Page 4 of 61
SK2019 FCSD 1V-01-EC-001_1
Model Code Nomenclature
FCSD 1V
-
01
-
FLEXI
-
EC
EC
EC Motor Configuration
FLEXI
Flexible function onboard PCB with drain
pump, louver and zone control
functionality.
01-02
Unit Sizes. See General Specification
section A for cooling and heating
capacities
FCSD 1V
Hydronic Cassette Super Slim Series

Page 5 of 61
SK2019 FCSD 1V-01-EC-001_1
Technical Data
General Description
The Super Slim Hydronic Cassette makes each served area an independent controlled temperature zone to suit
diverse requirements.
Construction
Casing is constructed of durable flame resistant acrylonitrile-butadiene-styrene (ABS) plastic. RAL9010 fascia is
constructed of high-impact polystyrene.
Chilled water coil
Coils are 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 under
water at 25 Bar and recommended for operation at 8 Bar. Coils include manual air vent and water purge.
Blower and Motor
The unit incorporates only specially designed and tested EC motors, allowing the blower wheel to provide
optimum performance in airflow-efficiency and quiet operation.
Filters
Washable, easy-to-remove, fine mesh air filters are standard to all high-wall models. Tabs located on the front of
the unit can be unsnapped, allowing the filter to be easily slid downward and removed. No tools are required,
nor any dismantling of the equipment.
Air Grille Distribution
The unit is equipped with both deflector blades and independent directional vanes, enabling supply air to be
automatically distributed, and air flow and direction to be customized.
Condensate pump
A condensate pump is fitted to carry water out of the unit. The pump is fixed to a mounting bracket. The pump
can be withdrawn from the bottom after removing the front panel. A float switch is fitted to stop the cooling
action when the pump become blocked or failed.
Microprocessor controls (EC-TOTAL type)
The PCB (printed circuit board) microprocessor control board relays control the operation of the indoor-fan motor,
water valves (ON/OFF or modulating) and electric heater, to maintain room conditions at a user-defined set point.
Temperature settings, fan speeds and other control functions can be changed by the infrared handset or wired
wall pad.
Electro-mechanical controls (EC-FLEXI type)
A 230VAC signal from the thermostat which working power is from L and N or from indoor room to terminal
H/M/L supplies power to the blower motor. When H (H/M/L) is powered ON, the stepping motor is working and
open the louver at maximum position. When H (H/M/L) is powered OFF, the stepping motor will close the louver.
The condensate pump will run continuously, as long as coil temperature is less than 15°C. Alarm interlock relay is
for unit failure notification. Normally open or normally closed contacts are available for field connection.

Page 6 of 61
SK2019 FCSD 1V-01-EC-001_1
General Specifications
Product range:FCSD 1V-EC Super Slim Hydronic Cassette with EC Motor
FCSD 1V-[Size]-EC
01
02
Unit Configuration
Configuration
2 pipe
Number Of Fan Blowers
Single
Power Supply
(V/Ph/Hz)
230 / 1 / 50
220 / 1 / 60
Operation Control
TOTAL: Complete function onboard PCB
FLEXI: Flexible function onboard PCB
Performance Data
Air
Air Flow
H
m3/hr
450
600
M
350
450
L
150
250
Cooling
Cooling Capacity
H
Kw
2.56
3.19
M
2.12
2.56
L
1.05
1.62
Sensible Cooling Capacity
H
1.79
2.27
M
1.47
1.79
L
0.73
1.11
FCEER
Rating
135.8
149.5
Class
B
B
Heating
Heating Capacity
H
kW
2.6
3.21
M
2.15
2.6
L
1.08
1.65
Max. Electric Heater Capacity
1.0
FCCOP
Rating
261.5
252.8
Class
B
B
Noise
Sound Pressure Level
dB(A)
37/33/23
41/37/26
Sound Power Level
46/42/32
50/46/35
Electrical
Power input in cooling mode
H
W
18
27
M
13
18
L
9
10
Power input in heating mode
H
W
13
22
M
8
13
L
4
5
Fan Motor Running Current @ H
A
0.16
0.23
Hydraulic
Cooling Water Flow Rate
H
L/h
439
547
M
363
439
L
180
278
Cooling Water Pressure Drop
H
kPa
25.4
36.9
M
18.4
25.4
L
5.6
11.7
Hot Water Flow Rate
H
L/h
445
551
M
368
445
L
185
283
Hot Water Pressure Drop
H
kPa
21.8
31.3
M
15.8
21.8
L
4.9
10.1
Water Content
L
0.642
0.642
Construction and Packing Data
Water
Type
Internal thread
in
mm[in]
12.7 [1/2”]
out
Condensate Drainage Connection
19 [3/4”]
Case Dimensions
L
mm
1054
W
427
H
152
Front panel
1182 X 467 X 25
Net weight
kg
13.5
a. Cooling mode (2-pipe):
b. Heating mode (2-pipe):
- Return air temperature: 27C DB/ 19C WB.
- Return air temperature: 20C.
- Inlet/ Outlet water temperature: 7C/ 12C.
- Inlet/ outlet water temperature: 45/ 40C.

Page 7 of 61
SK2019 FCSD 1V-01-EC-001_1
Coil Data
Model
Fin Height
(mm)
Fin Length (mm)
Fins / inch
No. of
rows
No. of
circuits
Tube
Diameter
(mm)
FCSD 1V-01/02
252
755
18.5
2
3
7
Dimension Drawings
(All dimensions shown in mm)

Page 8 of 61
SK2019 FCSD 1V-01-EC-001_1
Sound power data
Model
FCSD 1V-01-EC
Speed
H
(1200)
M
(1000)
L
(600)
600RPM
700RPM
800RPM
900RPM
1000RPM
1100RPM
1200RPM
1300RPM
1400RPM
Sound Power dB(A)
46.9
42.0
32.0
32.0
34.7
36.2
39.2
42.0
44.6
46.9
49.2
51.4
Sound Power in 1/3 Octave-bands under ESP:0Pa (dB)
20.0 Hz
13.6
17.6
12.1
12.1
13.3
18.1
9.1
17.6
14.7
13.6
18.7
13.8
25.0 Hz
12.3
16.0
11.3
11.3
14.6
16.6
10.2
16.0
15.6
12.3
18.1
10.2
31.5 Hz
6.4
8.8
8.6
8.6
8.3
11.5
7.7
8.8
8.3
6.4
5.5
14.4
40.0 Hz
6.6
4.7
5.8
5.8
3.7
10.3
5.2
4.7
8.9
6.6
7.6
11.2
50.0 Hz
9.9
11.5
7.3
7.3
8.7
11.6
10.9
11.5
11.5
9.9
9.9
11.5
63.0 Hz
12.5
24.8
3.9
3.9
10.7
8.3
26.2
24.8
7.1
12.5
16.0
16.8
80.0 Hz
15.3
11.6
0.2
0.2
4.3
10.1
9.4
11.6
13.3
15.3
16.8
16.1
100.0 Hz
15.8
17.2
3.3
3.3
7.1
10.7
12.1
17.2
21.6
15.8
18.1
22.5
125.0 Hz
27.3
16.8
11.9
11.9
17.7
12.2
14.2
16.8
21.2
27.3
29.2
33.9
160.0 Hz
25.7
19.8
12.2
12.2
14.9
19.5
18.2
19.8
22.5
25.7
27.2
33.2
200.0 Hz
27.1
21.6
12.4
12.4
15.5
18.0
18.6
21.6
23.6
27.1
29.0
30.6
250.0 Hz
33.5
27.4
16.5
16.5
22.3
20.7
26.8
27.4
33.6
33.5
34.5
39.5
315.0 Hz
35.8
31.8
19.0
19.0
23.5
26.9
27.8
31.8
34.9
35.8
36.9
38.8
400.0 Hz
35.0
30.3
21.2
21.2
22.9
23.5
26.9
30.3
34.2
35.0
36.6
39.1
500.0 Hz
36.9
31.5
25.0
25.0
26.6
27.1
29.2
31.5
33.9
36.9
39.7
42.1
630.0 Hz
39.8
35.3
22.4
22.4
26.1
29.1
32.4
35.3
36.9
39.8
40.9
42.7
800.0 Hz
37.3
31.8
16.8
16.8
22.1
24.7
28.5
31.8
35.0
37.3
38.9
41.2
1000.0 Hz
40.1
33.5
19.1
19.1
22.4
24.5
29.1
33.5
36.7
40.1
42.0
45.1
1250.0 Hz
37.2
30.4
21.2
21.2
23.2
23.8
27.5
30.4
33.5
37.2
40.1
42.1
1600.0 Hz
34.1
27.8
20.5
20.5
22.3
22.3
24.8
27.8
30.9
34.1
36.7
39.3
2000.0 Hz
32.0
25.8
20.2
20.2
21.4
22.5
24.0
25.8
28.8
32.0
34.8
37.6
2500.0 Hz
29.1
23.6
18.0
18.0
18.7
19.0
21.3
23.6
26.6
29.1
32.4
34.8
3150.0 Hz
25.5
20.5
16.7
16.7
17.6
17.7
18.7
20.5
23.1
25.5
29.4
32.2
4000.0 Hz
21.7
19.4
16.7
16.7
17.4
17.3
18.2
19.4
20.5
21.7
24.2
27.1
5000.0 Hz
20.6
18.2
16.4
16.4
16.9
17.1
17.5
18.2
19.2
20.6
22.0
24.5
6300.0 Hz
19.1
18.1
16.2
16.2
16.7
16.8
17.1
18.1
18.6
19.1
19.7
21.2
8000.0 Hz
15.2
14.8
14.8
14.8
14.7
14.8
14.8
14.8
15.0
15.2
15.3
16.1
10000.0 Hz
13.1
13.0
12.9
12.9
13.0
12.9
12.8
13.0
13.0
13.1
13.1
13.4
12500.0 Hz
9.7
9.9
9.6
9.6
9.6
9.7
9.8
9.9
10.4
9.7
9.7
9.8
16000.0 Hz
7.6
8.1
6.5
6.5
6.7
7.0
20.4
8.1
11.8
7.6
7.8
8.2

Page 9 of 61
SK2019 FCSD 1V-01-EC-001_1
Model
FCSD 1V-02-EC
Speed
H
(1350)
M
(1200)
L
(700)
600
RPM
700
RPM
800
RPM
900
RPM
1000
RPM
1100
RPM
1200
RPM
1300
RPM
1350
RPM
1400
RPM
Sound Power
dB(A)
50.0
46.9
34.7
32.0
34.7
36.2
39.2
42.0
44.6
46.9
49.2
50.0
51.4
Sound Power in 1/3 Octave-bands under ESP:0Pa (dB)
20.0 Hz
11.6
13.6
13.3
12.1
13.3
18.1
9.1
17.6
14.7
13.6
18.7
11.6
13.8
25.0 Hz
9.1
12.3
14.6
11.3
14.6
16.6
10.2
16.0
15.6
12.3
18.1
9.1
10.2
31.5 Hz
9.5
6.4
8.3
8.6
8.3
11.5
7.7
8.8
8.3
6.4
5.5
9.5
14.4
40.0 Hz
7.1
6.6
3.7
5.8
3.7
10.3
5.2
4.7
8.9
6.6
7.6
7.1
11.2
50.0 Hz
11.1
9.9
8.7
7.3
8.7
11.6
10.9
11.5
11.5
9.9
9.9
11.1
11.5
63.0 Hz
15.3
12.5
10.7
3.9
10.7
8.3
26.2
24.8
7.1
12.5
16.0
15.3
16.8
80.0 Hz
17.6
15.3
4.3
0.2
4.3
10.1
9.4
11.6
13.3
15.3
16.8
17.6
16.1
100.0 Hz
21.6
15.8
7.1
3.3
7.1
10.7
12.1
17.2
21.6
15.8
18.1
21.6
22.5
125.0 Hz
32.1
27.3
17.7
11.9
17.7
12.2
14.2
16.8
21.2
27.3
29.2
32.1
33.9
160.0 Hz
30.6
25.7
14.9
12.2
14.9
19.5
18.2
19.8
22.5
25.7
27.2
30.6
33.2
200.0 Hz
29.2
27.1
15.5
12.4
15.5
18.0
18.6
21.6
23.6
27.1
29.0
29.2
30.6
250.0 Hz
35.4
33.5
22.3
16.5
22.3
20.7
26.8
27.4
33.6
33.5
34.5
35.4
39.5
315.0 Hz
38.5
35.8
23.5
19.0
23.5
26.9
27.8
31.8
34.9
35.8
36.9
38.5
38.8
400.0 Hz
38.5
35.0
22.9
21.2
22.9
23.5
26.9
30.3
34.2
35.0
36.6
38.5
39.1
500.0 Hz
40.2
36.9
26.6
25.0
26.6
27.1
29.2
31.5
33.9
36.9
39.7
40.2
42.1
630.0 Hz
41.4
39.8
26.1
22.4
26.1
29.1
32.4
35.3
36.9
39.8
40.9
41.4
42.7
800.0 Hz
40.0
37.3
22.1
16.8
22.1
24.7
28.5
31.8
35.0
37.3
38.9
40.0
41.2
1000.0 Hz
43.3
40.1
22.4
19.1
22.4
24.5
29.1
33.5
36.7
40.1
42.0
43.3
45.1
1250.0 Hz
39.8
37.2
23.2
21.2
23.2
23.8
27.5
30.4
33.5
37.2
40.1
39.8
42.1
1600.0 Hz
37.5
34.1
22.3
20.5
22.3
22.3
24.8
27.8
30.9
34.1
36.7
37.5
39.3
2000.0 Hz
35.7
32.0
21.4
20.2
21.4
22.5
24.0
25.8
28.8
32.0
34.8
35.7
37.6
2500.0 Hz
33.8
29.1
18.7
18.0
18.7
19.0
21.3
23.6
26.6
29.1
32.4
33.8
34.8
3150.0 Hz
30.4
25.5
17.6
16.7
17.6
17.7
18.7
20.5
23.1
25.5
29.4
30.4
32.2
4000.0 Hz
25.8
21.7
17.4
16.7
17.4
17.3
18.2
19.4
20.5
21.7
24.2
25.8
27.1
5000.0 Hz
23.1
20.6
16.9
16.4
16.9
17.1
17.5
18.2
19.2
20.6
22.0
23.1
24.5
6300.0 Hz
20.8
19.1
16.7
16.2
16.7
16.8
17.1
18.1
18.6
19.1
19.7
20.8
21.2
8000.0 Hz
15.5
15.2
14.7
14.8
14.7
14.8
14.8
14.8
15.0
15.2
15.3
15.5
16.1
10000.0 Hz
13.2
13.1
13.0
12.9
13.0
12.9
12.8
13.0
13.0
13.1
13.1
13.2
13.4
12500.0 Hz
10.5
9.7
9.6
9.6
9.6
9.7
9.8
9.9
10.4
9.7
9.7
10.5
9.8
16000.0 Hz
12.0
7.6
6.7
6.5
6.7
7.0
20.4
8.1
11.8
7.6
7.8
12.0
8.2

Page 10 of 61
SK2019 FCSD 1V-01-EC-001_1
Valve Information (Optional parts)
2-Way Valve Body
3-Way Valve Body
Valve Code
(valve body + ON/ OFF
thermoelectric actuator)
Valve Body Dimensions (mm)
DN
A
B
C
D
SGS14HFCA-23020101
D15
(G1/2”)
52
47
19.5
63
Valve Code
(valve body + ON/ OFF
thermoelectric actuator)
Valve Body Dimensions (mm)
DN
A
B
C
D
SGS14HFCA-23020102
D15
(G1/2”)
52
70
40
86
DN 3/4”

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SK2019 FCSD 1V-01-EC-001_1
Actuator
Model
DR-16-230B
DR-16-24B
DR-15B-24B
Normal closed
Normal closed
Normal closed
Voltage
230Vac
24Vac
24Vac
Working force
90~125N
90~125N
90~125N
Time
4.5min
4.5min
4.5min
Power
3W
3W
3W
Full stroke
3.5mm
3.5mm
5.0mm
Imax
150mA
250mA
250mA
Wires
2-wire
2-wire
3-wire (red, blue, black)

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SK2019 FCSD 1V-01-EC-001_1
Installation
Safety Precautions
•When installing, performing maintenance or servicing Daitsu 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.

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SK2019 FCSD 1V-01-EC-001_1
Standard Configurations and Accessories
First check the contents of the package.
There are two types of control PCBs:
~EC-TOTAL version:
TOTAL configuration – Complete function integrated controller, compatible with IR handset controller, wired
wall-pad, serial networking for master-slave and MODBUS applications.
~EC-FLEXI version:
FLEXI configuration – Flexible function controller with zone control functionality, compatible with standard
wired thermostat controller and optional Electric Heater.
Optional and standard accessories supplied with the unit are dependent on control configuration type.
Control Configuration Type
Accessory list:
~TOTAL:
Complete function on board PCB
with integrated group control
functionality.
~FLEXI:
Flexible function on board
PCB with drain pump, louver
and zone control
functionality.
IR remote handset
SGS14HFCA-16000101
Optional (1 pc)
N/A
Wired wall-pad
SGS14HFCA-26000101
Optional (1 pc)
N/A
STCD wired thermostats
ALL models
N/A
Optional (1 pc)
Installation Manual
Standard (1 pc)
Standard (1 pc)
Operating Limits
Power supplies
Volt
Phase
Hz
230
1
50
220
1
60
Water circuit
Minimum entering water temperature
+2 °C
Maximum entering water temperature
+80 °C
Water side maximum pressure
1600 kPa

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SK2019 FCSD 1V-01-EC-001_1
Before Installation
The installation site must be established by the system designer or other qualified professional, taking account of the
technical requisites, current standards and regulations.
Super slim cassette fan coil unit must be installed by qualified personnel only.
Super slim cassette fan coil unit is designed for installation in a lowered ceiling.
Super slim cassette fan coil unit must be installed in such a way as to enable treated air to circulate throughout the
room and allow the minimum distance required for technical maintenance operation.
It is advisable to place the unit close to the installation site without removing it from packaging.
Do not put heavy tools or weights on packaging.
Upon receipt, the unit and the packaging must be checked for damage sustained in transit and if necessary, a damage
claim must be filed with the shipping company.
Check immediately for installation accessories inside the packaging.
Do not lift unit by the condensate drain discharge pipe, by the water connections or by front panel; lift the unit using
four mounting brackets. (Figure B.4)
Check and note the unit serial number.
Figure B.4
Brackets

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SK2019 FCSD 1V-01-EC-001_1
Installation Location
Do not install the unit in rooms where flammable gas or alkaline acid substances are present. Aluminum/copper coils
and/or internal plastic components can be damaged irreparably.
Do not install in workshops or kitchens; drawn in oil vapors might deposit on the coils and alter their performance or
damage the internal plastic parts of the unit.
If installation of unit includes using a lift, insert a plywood sheet between the unit and the lift forks to avoid damaging
unit. (Figure B.5.1)
It is recommended to locate the unit near one side of room to ensure optimum air distribution. (Figure B.5.2)
Generally, the best louver position is the one which allows air diffusion along the ceiling. Alternative positions can be
selected.
Confirm sufficient space is provided to allow removal of panels from the ceiling in the selected position and to allow
enough clearance for maintenance and servicing operations.
Figure B.5.1
Figure B.5.2

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SK2019 FCSD 1V-01-EC-001_1
Ceiling Clearance
Verify inlet and outlet grilles are not obstructed to ensure proper air flow.
Confirm location allows condensate to be properly drained.
Confirm height between the bottom of upper deck and top of ceiling is sufficient for installation. (Figure B.6)
Ensure there is sufficient space around the unit to provide installation and service.
Figure B.6
Model
B (mm)
FCSD 1V-01/02
Minimum 10
Condensate Drainage Connection
The unit is fitted with a condensate pump with a maximum of 500mm lift. (Figure B.7.1)
The unit is provided with a ABS drainage outlet.
Confirm drain outlet has not been damaged before connecting drain pipe to unit.
Discharge pipe may be connected with hose clamp. (Figure B.7.2)
Insulate drain pipe after installation.
Figure B.7.1
Figure B.7.2
Caution
Factory-provided drain outlet is ABS. Using an unsuitable glue may damage the outlet.

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SK2019 FCSD 1V-01-EC-001_1
Water Connections and Valve Configurations
The Super Slim Cassette unit is provided with 1/2” water piping connections with gaskets.
•~TOTAL: Units are compatible with:
1. 230VAC 2-way or 3-way on/off valves (thermoelectric or electric motor-driven actuation), with OPEN/CLOSE state
actuation.
2. 24VAC 2-way or 3-way modulating valves with 0-10VDC modulating signal (motor-driven actuation) and variable
size aperture (10% to 100%).
•~FLEXI: Valve control requires external wired thermostat. See thermostat manual for details.
•Review below table for Valve diameter:
Model
External valve information
Type
Connector dia. (inch)
All models
2-way & 3-way
1/2”
•Valve installations:
See external valve installation below:
Caution
The valve body and connection pipes must be fully insulated to prevent condensation.

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SK2019 FCSD 1V-01-EC-001_1
Suspension Bolts Layout and Ceiling Opening
Using the installation template, remove and/or modify the ceiling panels and install suspension bolts as in the images
below.
1102 x 446: Dimensions for opening
1010.4 x 280.4: Suspension Bolts
Mark position of field supplied suspension rods, water lines, condensate drain pipe, line voltage and low voltage wiring.
Properly attach suspension rods to structure above.
Do not tighten nuts and counter nuts. This should only be done after all connections are made and leveling of unit is
confirmed.
Verify installation accommodates proper condensate drainage to pump.
Be careful while lifting fan coil unit into position. Do not lift the unit by condensate tray.
Counternut
Washer
NUT
Rod
Nut
50

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SK2019 FCSD 1V-01-EC-001_1
Installation Procedures:
1. Lift unit (without front panel) with care by four corners only. Do not lift unit by the condensate drain discharge pipe or
piping connections.
2. Incline and insert the unit into the ceiling. Insert support rods into the bracket slot.
3. Line up the unit to the supporting bars of the ceiling by tightening the nuts and counter nuts of the suspension rods.
4. After connecting the condensate drain piping and piping connections, confirm fan coil is level.
5. Check to ensure the unit is level. Drain will be at lowest point when unit is level.
6. Tighten nuts on the suspended rods.
Clearance between the unit and ceiling
MODEL
Clearance
All models
3mm
Rod