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65 

For SDC03*3E5/SDC05*3E5** 

  The equipment’s Power Supply 1 complies with 

IEC/EN 61000-3-2. 

  The equipment’s Power Supply 1 complies with 

IEC/EN 61000-3-3 and can be connected to 
current supply network. 

  The equipment’s Power Supply 2 complies with 

IEC/EN 61000-3-2. 

  The equipment’s Power Supply 2 complies with 

IEC/EN 61000-3-11 and shall be connected to 
suitable supply network, with the following 
maximum permissible system impedance Z

max

 = 

0.426Ω at the interface. Please liaise with supply 
authority to ensure that the Power Supply 2 is 
connected only to a supply of that impedance or 
less. 

 
For SDC07*3E5/SDC09*3E5** 

  The equipment’s Power Supply 1 complies with 

IEC/EN 61000-3-12. 

  The equipment’s Power Supply 1 complies with 

IEC/EN 61000-3-3 and can be connected to 
current supply network. 

  The equipment’s Power Supply 2 complies with 

IEC/EN 61000-3-2. 

  The equipment’s Power Supply 2 complies with 

IEC/EN 61000-3-11 and shall be connected to 
suitable supply network, with the following 
maximum permissible system impedance Z

max

 = 

0.426Ω at the interface. Please liaise with supply 
authority to ensure that the Power Supply 2 is 
connected only to a supply of that impedance or 
less. 

  Remote Controller mounted to the Indoor Unit can 

be moved to the room and serve as Room 
Thermostat. 

  Install at the height of 1 to 1.5 m from the floor 

(Location where average room temperature can 
be detected). 

  Install vertically against the wall. 

  Avoid the following locations for installation. 

1.  By the window, etc. exposed to direct sunlight 

or direct air. 

2.  In the shadow or backside of objects deviated 

from the room airflow. 

3.  Location where condensation occurs (The 

Remote Controller is not moisture proof or 
drip proof.) 

4.  Location near heat source. 
5. Uneven 

surface. 

  Keep distance of 1 m or more from the TV, radio 

and PC. (Cause of fuzzy image or noise) 

 
 
 

 

1
2

Terminal for Remote Controller wiring

Remote Controller

Indoor unit

Remote Controller wiring

(field supply)

•

No polarity

 

 

  Remote Controller cable shall be (2 × min 0.3 

mm

2

), of double insulation PVC-sheathed or 

rubber sheathed cable. Total cable length shall be 
50 m or less. 

  Be careful not to connect cables to other terminals 

of Indoor Unit (e.g. power source wiring terminal). 
Malfunction may occur. 

  Do not bundle together with the power source 

wiring or store in the same metal tube. Operation 
error may occur. 

1.  Remove the top case from the bottom case. 
 

Bottom

case

Flat-blade

screwdrive

Insert the

driver and

slightly turn.

 

 

2.  Remove the wiring between Remote controller 

and Indoor Unit terminal. Remove the bottom case 
from the Control board cover by loosening the 
screws. (2 pieces) 

 

Disconnect the
Remote controller
wiring

Claw
(2 places)

 

 

66 

For exposed type 
Preparation: Make 2 holes for screws using a driver. 
 

UP

Cut here with
a nipper and
remove the burr
with a file.

Mount the top case.

•

Align the claws of the top
case and then align the claws
of the bottom case.

Hole for screw

Screw
(field supply)

Claw (2 places)

Pass through

the hole

Bottom case

(Back side)

Top case
(Back side)

Remote controller terminal board

Remove the coating. Approx. 6 mm

Remove the sheath. Approx. 180 mm.
Make sure the wiring connection is in the
correct direction.

Clamper

(field supply)

Claw (2 places)

Wall to which
the remote
controller is
fixed

Mount the bottom case to

the wall.

Connect the remote control

wiring

•

Arrange the wires along the groove
of the case.

 

 

For embedded type 
Preparation: Make 2 holes for screws using a driver. 
 

UP

Avoid the wire
being caught.

Mount the top case.

•

Align the claws of the top
case and then align the claws
of the bottom case.

Hole for
screw

Screw
(field supply)

Claw (2 places)

Bottom case

(Back side)

Top case
(Back side)

Remote controller
terminal board

Remove the coating.

Approx. 6 mm

Make sure the wiring
connection is in the correct
direction.

Claw (2 places)

Mount the bottom case

to the wall.

•

Pass the wire through the hole
in the centre of the bottom case.

Connect the remote

control wiring

 

  Replace the existing Remote controller cover with 

Remote controller cover to close the hole left after 
remove the Remote controller. 

1.  Release the Remote controller cover’s hooks from 

behind the front plate. 

 

Front plate

Hook (6 places)

Existing Remote

controller cover

 

 

2.  Press from front to fix the Remote controller cover 

on the front plate.  

 

Front plate

Hook (6 places)

Remote

controller
cover

 

  Make sure all the piping installations are properly 

done before carry out below steps. 

1.  Turn the plug on the Air Purge Valve 

9

 outlet 

anticlockwise by one complete turn from fully 
closed position. 

 

Air purge valve

Plug (turn

one complete

turn)

Air purge valve 9

Plug (turn

anticlockwise by

anticlockwise by

one complete

turn)

or

9

 

 

2.  Set the Pressure Relief Valve 

13

 level "DOWN". 

 

Pressure relief

valve

Lever

Turn up

Pressure relief valve

13

13

 

67 

3.  Start filling water (with pressure more than 0.1 

MPa (1 bar)) to the Indoor Unit via water inlet. 
Stop filling water if the free water if the free water 
flow through Pressure Relief Valve drain hose. 

4.  Turn ON the power supply and make sure Water 

Pump 

16

 is running. 

5.  Check and make sure no water leaking at the tube 

connecting points. 

Be sure to switch off all power supply before performing each of the 
below checkings. Before obtaining access to terminals, all supply 
circuits must be disconnected. 

*(0.1 MPa = 1 bar) 
Water pressure should not lower than 0.05 MPa (with 
inspects the Water Pressure Gauge 

14

). If necessary 

add tap water into Tank Unit. Refer to Tank unit 
installation instruction for details on how to add water. 

13

  Check for correct operation of Pressure Relief 

Valve 

13

 by turning on the lever to become 

horizontal. 

  If you do not hear a clacking sound (due to water 

drainage), contact your local authorized dealer. 

  Push down the lever after finish checking. 

  In case the water keeps drained out from the unit, 

switch off the system, and then contact your local 
authorized dealer. 

12

[Lower limit water volume of the system] 
Please ensure the capacity of the circulating water of 
the total system including the capacity of the indoor 
unit is more than 30 L. 
If the water capacity is insufficient, during deice 
operation, the water temperature is lowered and the 
water will freeze in the system's component leading to 
product failure. 
[Upper limit water volume of the system] 
The indoor unit has a build-in Expansion Vessel with 
10 L air capacity and initial pressure of 1 bar. 
Total amount of water in the system should be below 
260 L. 
If the total amount of water is more than 260 L, please 
add expansion vessel (field supply). 
The expansion vessel capacity required for the system 
can be calculated from the formula below. 
 

V : Requ ired gas volume <expans ion vessel volume L>
Vo : System total water volume <L>

: Water expans ion rate 5

 60˚C = 0.0171

P

1

: Expans ion tank fi lling pressure = (100) kPa

P

2

: System max imum pressure      = 300 kPa

V =

x

Vo

1 -

98 +

P

1

98 +

P

2

з

з

 

  (     ) Please confirm at actual place 

  The gas volume of the sealed type expansion 
 

vessel is presented by <V>. 

  It's advised to add 10% margin for required gas 

volume of calculation. 

 

Water expansion rate table 

 

10

0.0003

20

0.0019

30

0.0044

40

0.0078

50

0.0121

60

0.0171

70

0.0228

80

0.0291

90

0.0360

 
[Adjustment of the initial pressure of the expansion 
vessel when there is a difference in installation height] 
If the height difference between the indoor unit and 
the highest point of the system water circuit (H) is 
more than 7m, please adjust the initial pressure of the 
expansion vessel (Pg) according to the following 
formula. 
 

Pg= (H* 10+30) kPa 

Ensure the RCCB/ELCB set to “ON” condition before 
check RCCB/ ELCB. 
Turn on the power supply to the Indoor Unit. 
This testing could only be done when power is 
supplied to the Indoor Unit. 
 

Be careful not to touch parts other than RCCB/ELCB test button 
when the power is supplied to Indoor Unit. Else, electrical shock 
may happen. Before obtaining access to terminals, all supply 
circuits must be disconnected. 

 

  Push the “TEST” button on the RCCB/ELCB. The 

lever would turn down and indicate “0”, if it 
functions normal. 

  Contact authorized dealer if the RCCB/ELCB 

malfunction. 

  Turn off the power supply to the Indoor Unit. 

  If RCCB/ELCB functions normal, set the lever to 

“ON” again after testing finish. 

 
This product contains fluorinated greenhouse gasses. 
Refrigerant type: R410A (GWP=2088) 
Amount: 1.20 kg (2.5056 ton CO

2 

equivalent) 

(The amount do not include the additional refrigerant 
when refrigerating piping length extended. Please 
refer to adhered label on outdoor unit for exact 
amount of refrigerant used and actual tonnes of CO

2

 

equivalent.) 
 
 
 
 

68 

1.  Fill up the Tank Unit with water. For details refer to 

Tank Unit installation instruction and operation 
instruction. 

2.  Set ON to the Indoor Unit and RCCB/ELCB. Then, 

for control panel operation please refers to air-to-
water heatpump operation instruction. 

3.  For normal operation, pressure gauge 

14

 reading 

should be in between 0.05 MPa and 0.3 MPa. 

4.  After test run, please clean the Water Filter Set 

15

. 

Reinstall it after finish cleaning. 

11

Overload Protector 

11

 serves the safety purpose to 

prevent the water over heating. When the Overload 
Protector 

11

 trip at high water temperature, take below 

steps to reset it. 
1.  Take out the cover. 
2.  Use a test pen to push the centre button gently in 

order to reset the Overload Protector 

11

. 

3.  Fix the cover to the original fixing condition. 

 

Use test pen to push

this button for reset

Overload protector       .

11

 

  In order to ensure safety and optimal performance 

of the unit, seasonal inspections on the unit, 
functional check of RCCB/ELCB, field wiring and 
piping have to be carried out at regular intervals. 
This maintenance should be carried out by 
authorized dealer. Contact dealer for scheduled 
inspection. 

15

1.  Turn OFF power supply. 
2.  Set the two valves for the Water Filter Set 

15

 to 

“CLOSE”. 

3.  Take off the clip, then gently pull out the mesh. 

Beware of small amount water drain out from it. 

4.  Clean the mesh with warm water to remove all the 

stain. Use soft brush if necessary. 

5.  Reinstall the mesh to the Water Filter Set 

15

 and 

set back the clip on it. 

6.  Set the two valves for the Water Filter Set 

15

 to 

“OPEN”. 

7.  Turn ON power supply. 
 
 

 

Strictly follow the steps below for proper pump down procedure. 
Explosion may occur if the steps are not followed as per sequence.
1.  When the Indoor Unit is not in operation (standby), enter the 

Service setup menu in the Remote Controller and select Pump 
down operation to turn it ON. (See APPENDIX for detail) 

2.  After 10~15 minutes, (after 1 or 2 minutes in case very low 

ambient temperatures (< 10°C)), fully close 2 way valve on 
Outdoor Unit. 

3.  After 3 minutes, fully close 3 way valve on Outdoor Unit. 
4.  Press the "OFF/ON" switch on the Remote Controller 

3

 to stop 

pump down operation. 

5. Remove the refrigerant piping. 

 

Is there any gas leakage at flare nut connections?
Has the heat insulation been carried out at flare nut
connection?
Is the connecting cable fixed to terminal board firmly?

Is the connecting cable clamped firmly?

Is the earth wire connection properly done?

Is water pressure higher than 0.05 MPa?

Is the pressure relief valve      operation normal?

Is the RCCB/ELCB operation normal?

Is the Indoor Unit properly hooked to the installation plate?

Is the power supply voltage within the rated voltage range?

Is there any abnormal sound?

Is the heating operation normal?

Is the thermostat operation normal?

Is the remote controller      LCD operation normal?

Is the Indoor Unit water leak free on test run?

13

3