Panasonic WH-SDC03H3E5-1 / WH-SDC05H3E5-1 / WH-SDC07H3E5-1 / WH-SDC09H3E5-1 / WH-UD03HE5-1 / WH-UD05HE5-1 / WH-UD07HE5-1 / WH-UD09HE5-1 Simplified Service Manual ▷ View online
61
2. Gently pull the lower section of the front plate
towards you to remove the front plate from left and
right hooks.
right hooks.
3. Hold the left edge and right edge of front plate to
lift up front plate from hooks.
Hook
Lift up
Screws
11.1.4.2 Install the indoor unit
1. Engage the slots on the indoor unit to the hooks of
installation plate. Ensure the hooks are properly
seated on the installation plate by moving it left
and right.
seated on the installation plate by moving it left
and right.
2. Fix the screws 5 to the holes on the hooks of
installation plate 4, as illustrated below.
Installation plate
Indoor unit back
Slots
Wall
Hooks
Installation plate
Screws
Note: Do not lift the
Indoor Unit by holding the
refrigerant and water pipes
to prevent damage of the
pipes.
11.1.4.3 Water Piping Installation
The minimum requirement of water in the system
is 30 litres. If this value could not be achieved,
please install additional buffer tank (field supply).
please install additional buffer tank (field supply).
Water inlet and water outlet in indoor unit are used
for connection to water circuit. Please request a
licensed technician to install this water circuit.
licensed technician to install this water circuit.
This water circuit must comply with all relevant
European and national regulations, i.e. IEC/EN
61770.
61770.
Be careful not to deform the piping to excessive
force when doing piping connection job.
Use Rp 1 ¼" nut for both water inlet and outlet
connection and clean all pipings with tap water
before connecting to the indoor unit.
before connecting to the indoor unit.
Cover the pipe end to prevent dirt and dust when
inserting it through a wall.
Choose proper sealer which can withstand the
pressures and temperatures of the system.
If an existing tank is to be connected to this indoor
unit, ensure the pipes are clean before water pipe
installation is carried out.
installation is carried out.
Be sure to use two spanners to tighten the
connection. Tighten the nuts with torque wrench:
117.6N•m.
117.6N•m.
Torque wrench
Indoor unit
Spanner
If non-brass metallic piping is used for installation,
make sure to insulate the pipes to prevent
galvanic corrosion.
galvanic corrosion.
Make sure to insulate the water circuit pipes to
prevent reduction of heating capacity.
After installation, check the water leakage
condition in connection area during test run.
Water Inlet
Water Outlet
CAUTION
Do not over tighten, over tightening cause water leakage.
11.1.4.4 Refrigerant Pipe Installation
1 Please make flare after inserting flare nut (located
at joint portion of tube assembly) onto the copper
pipe. (In case of using long piping)
pipe. (In case of using long piping)
2 Do not use pipe wrench to open refrigerant piping.
Flare nut may be broken and cause leakage. Use
proper spanner or ring wrench.
proper spanner or ring wrench.
3 Connect the piping:
Align the center of piping and sufficiently
tighten the flare nut with fingers.
Be sure to use two spanners to tighten the
connection.
62
Further tighten the flare nut with torque
wrench in specified torque as stated in the
table.
wrench in specified torque as stated in the
table.
Torque wrench
Spanner or
Wrench
WH-SDC03H3E5-1 WH-SDC05H3E5-1
Piping size (Torque)
Gas Liquid
ø12.7 mm (1/2”) [55 N•m]
ø6.35 mm (1/4”) [18 N•m]
WH-SDC07H3E5-1 WH-SDC09H3E5-1
Piping size (Torque)
Gas Liquid
Ø15.88mm (5/8”) [65 N•m]
ø6.35 mm (1/4”) [18 N•m]
Liquid Refrigerant Pipe Gas Refrigerant Pipe
CAUTION
Do not over tighten, over tightening cause water leakage.
CAUTION
Please take extra precaution when open the control board cover
and control board for indoor unit installation and servicing. Failure
to do so may cause injury.
and control board for indoor unit installation and servicing. Failure
to do so may cause injury.
CUTTING AND FLARING THE PIPING
1. Please cut using pipe cutter and then remove
the burrs.
2. Remove the burrs by using reamer. If burrs is
not removed, gas leakage may be caused.
Turn the piping end down to avoid the metal
powder entering the pipe.
Turn the piping end down to avoid the metal
powder entering the pipe.
3. Please make flare after inserting the flare nut
onto the copper pipes.
When properly flared, the internal surface
of the flare will evenly shine and be of even
thickness. Since the flare part comes into
contact with the connections, carefully check
the flare finish.
■
Improper flaring
■
Inclined Surface
damaged
CrackedUneven
thickness
1. To cut
2. To remove burrs
3. To flare
Bar
Red arrow mark
Handle
Core
Yoke
Clamp handle
Bar
0 – 0.5 mm
Copper
pipe
pipe
Reamer
Point down
Pipe
11.1.4.5 Drain Elbow and Hose
Installation
Fix the drain elbow and packing to the bottom of
indoor unit, as shown in below illustration.
Use inner diameter 17 mm drain hose in the
market.
This hose must to be installed in a continuously
downward direction and in a frost-free
environment.
environment.
Guides this hose’s outlet to outdoor only.
Do not insert this hose into sewage or drain pipe
that may generate ammonia gas, sulfuric gas, etc.
If necessary, use hose clamp to further tighten the
hose at drain hose connector to prevent leakage.
Water will drip from this hose, therefore the outlet
of this hose must be installed in an area where the
outlet cannot become blocked.
outlet cannot become blocked.
Packing
Drain Elbow
11.1.4.6 Pressure
Relief Valve Drainage
Pipework
Connect a drain hose to the pressure relief valve
hose outlet.
This hose must to be installed in a continuously
downward direction and in a frost-free
environment.
environment.
Guides this hose’s outlet to outdoor only.
Do not insert this hose into sewage hose or
cleaning hose that may generate ammonia gas,
sulfuric gas, etc.
sulfuric gas, etc.
If necessary, use hose clamp to further tighten the
hose at drain hose connector to prevent leakage.
Water will drip from this hose, therefore the outlet
of this hose must be installed in an area where the
outlet cannot become blocked.
outlet cannot become blocked.
Pressure relief valve
hose outlet
63
11.1.4.7 Air-Tightness Test on the
Refrigerating System
Before system charged with refrigerant and before the
refrigerating system in put into operation, below site
test procedure and acceptance criteria shall be
verified by the certified technicians, and/or the
installer:-
Step 1: Pressure test for refrigerant leak detection:
1. Steps for pressure test, in accordance to ISO
refrigerating system in put into operation, below site
test procedure and acceptance criteria shall be
verified by the certified technicians, and/or the
installer:-
Step 1: Pressure test for refrigerant leak detection:
1. Steps for pressure test, in accordance to ISO
5149.
2. Evacuate the system from refrigerant before the
leak test, attach the gauge manifold set correctly
and tightly. Charging hose of Low side connect to
Gas side. (Charging hose of High side connect to
Liquid side if applicable.)
and tightly. Charging hose of Low side connect to
Gas side. (Charging hose of High side connect to
Liquid side if applicable.)
3. Adjust the knob on the service valves, and
regulator on the gauge set, so that test gas can be
inserted through the centre manifold of the gauge
set.
inserted through the centre manifold of the gauge
set.
4. Insert Nitrogen gas into the system through the
centre manifold and wait until the pressure within
the system to reach about 1MPa (10 BarG) wait
for a few hours and monitor the pressure reading
on the gauges.
the system to reach about 1MPa (10 BarG) wait
for a few hours and monitor the pressure reading
on the gauges.
5. Please note that the system’s pressure may rise
slightly if the test is carried out on mid day, due to
temperature rise. The inverse may happen when
there is temperature drop at night. However, this
variation will be minimal.
temperature rise. The inverse may happen when
there is temperature drop at night. However, this
variation will be minimal.
6. Waiting time depends on the size of the system.
Larger systems may require 12 hours of waiting
time. Leak detection within smaller system can be
achieved in 4 hours.
time. Leak detection within smaller system can be
achieved in 4 hours.
7. Check if there is a constant pressure drop. Move
to next step “Step 2: Refrigerant leak detection...”
if there is any pressure drop. Otherwise, release
the Nitrogen gas and, move to “Step 3: Vacuum
test”.
if there is any pressure drop. Otherwise, release
the Nitrogen gas and, move to “Step 3: Vacuum
test”.
8. Next, insert a small amount of same refrigerant
into the system through the centre hose, until the
pressure reaches about 1MPa (10 BarG).
pressure reaches about 1MPa (10 BarG).
2
2
N
2
R-###
(Low/Gas)
pressure gauge
(High/Liquid) pressure gauge
An example illustrations of setup for
refrigerant leak detection.
3
7
4
8
Step 2: Refrigerant leak detection through Electronic
halogen leak detector and/or ultrasonic leak detector:
1. Use any one of below detector to check leaking.
halogen leak detector and/or ultrasonic leak detector:
1. Use any one of below detector to check leaking.
Electronic halogen leak detector.
Switch on the unit.
Cover the test area from direct draft.
Pass the detection probe near test area
and wait for audible and visible signals.
Ultrasonic Leak Detector
Make sure the area is quiet.
Switch on the ultrasonic leak detector.
Move the probe along your air
conditioning system to test for leaks, and
mark for repair.
mark for repair.
2. Any leak detected at this level shall be repaired
and retested, starting from “Step 1: Pressure test”.
NOTE:
Always recover the refrigerant and Nitrogen gas
into recovery cylinder after completion of a test.
You must use the detection equipment with
Detectable Leak Rate of 10
-6
Pa. m
3
/s or better.
Do not use refrigerant as test medium for system
with total refrigerant charge more than 5kg.
Test shall be performed with dry Nitrogen or
another non-flammable, non-reactive, dried gas.
Oxygen, air or mixtures containing them shall not
be used.
Oxygen, air or mixtures containing them shall not
be used.
Step 3: Vacuum test:
1. Perform Vacuum test to check leak / moisture if
present.
2. Refer to section “EVACUATION OF THE
EQUIPMENT” to vacuum gas out of the air
conditioning system.
conditioning system.
3. Wait for a few hours, depending on the size of the
refrigerating system and monitor the pressure rise.
If the pressure rises until 1 bar absolute, then
there is leak.
If the pressure rises, but it is lower than 1 bar
absolute, then moisture is present.
If the pressure rises until 1 bar absolute, then
there is leak.
If the pressure rises, but it is lower than 1 bar
absolute, then moisture is present.
Next, remove the moisture, or repair, and redo the
refrigerant leak testing, starting from “Step 1: Pressure
test”.
2
2
3
Vacuum pump
Handle
(Low/Gas)
pressure gauge
(High/Liquid) pressure gauge
An example illustrations of setup for
refrigerant leak detection.
64
11.1.5 Connect The Cable To The Indoor
Unit
WARNING
This section is for authorised and licensed electrician only. Work
behind the Control Board Cover secured by screws must
only be carried out under supervision of qualified contractor,
installation engineer or service person.
behind the Control Board Cover secured by screws must
only be carried out under supervision of qualified contractor,
installation engineer or service person.
11.1.5.1 Open the Control Board Cover
Please follow the steps below to open control board
cover. Before opening the control board cover of
indoor unit, always switch off all power supply (i.e.
indoor unit power supply, heater power supply and
Tank Unit power supply).
1. Remove the 6 mounting screws at the control
cover. Before opening the control board cover of
indoor unit, always switch off all power supply (i.e.
indoor unit power supply, heater power supply and
Tank Unit power supply).
1. Remove the 6 mounting screws at the control
board cover.
2. Swing the control board cover to the right hand
side.
Screws
Screws
11.1.5.2 Fixing of Power Supply Cord
and Connecting Cable
1. Connecting cable between Indoor Unit and
Outdoor Unit shall be approved polychloroprene
sheathed 4 × 1.5 mm
sheathed 4 × 1.5 mm
2
flexible cord, type
designation 60245 IEC 57 or heavier cord.
Ensure the colour of wires of Outdoor Unit and
the terminal no. are the same to the Indoor
Unit respectively.
Unit respectively.
Earth wire shall be longer than other wires as
shown in the figure for the electrical safety in
case of the slipping out of the cord from the
Holder (Clamper).
case of the slipping out of the cord from the
Holder (Clamper).
2. An isolating device must be connected to the
power supply cable.
Isolating device (disconnecting means) should
have minimum 3.0 mm contact gap.
Connect the approved polychloroprene
sheathed power supply 1 cord and power
supply 2 cord and type designation 60245 IEC
57 or heavier cord to the terminal board, and
to the other end of the cord to isolating device
(Disconnecting means). See below table for
cable size requirement.
supply 2 cord and type designation 60245 IEC
57 or heavier cord to the terminal board, and
to the other end of the cord to isolating device
(Disconnecting means). See below table for
cable size requirement.
WH-SDC03H3E5-1 WH-SDC05H3E5-1
Power Supply
Cord
Cable Size
Isolating
Devices
Recommended
RCD
1
3 × 1.5 mm
2
15/16A
30mA, 2P, type A
2
3 × 1.5 mm
2
15/16A
30mA, 2P, type AC
WH-SDC07H3E5-1 WH-SDC09H3E5-1
Power Supply
Cord
Cable Size
Isolating
Devices
Recommended
RCD
1
3 × min
2.5 mm
2
30A
30mA, 2P, type A
2
3 × min
2.5 mm
2
30A
30mA, 2P, type A
3. To avoid the cable and cord being damaged by
sharp edges, the cable and cord must be passed
through a bushing (located at the bottom of
Control Board) before terminal board. The bushing
must be used and must not be removed.
through a bushing (located at the bottom of
Control Board) before terminal board. The bushing
must be used and must not be removed.
Terminals on the Outdoor Unit
1
2
3
1
2
3
Colour of wires (Connecting cables)
Terminals on the Indoor Unit
L
N
L
N
L
1
N
1
(Power Supply Cord)
Terminals on the isolating
devices from power supply
(Disconnecting means)
devices from power supply
(Disconnecting means)
L
1
N
1
Indoor Unit/
Outdoor Unit
connection
Power Supply 1
Power Supply 2
Power Supply Cord
Holder (Clamper)
Terminal Board
RCCB/ELCB
*1
*1
Connecting Cable
Terminal screw
Tightening torque N•m {kgf•cm}
M4 157~196
{16~20}
M5 196~245
{20~25}
*1 - Earth wire must be longer than other cables for safety reasons
11.1.5.3 Wire Stripping and Connecting
Requirement
Wire stripping
5mm or
more
(gap between
wires)
No loose strand
when insert
Indoor/outdoor
connecting
terminal board
10
±
1
m
m
ACCEPT
PROHIBITED
Conductor
over insert
Conductor not
fully insert
Conductor
fully insert
PROHIBITED
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