5
Access to Internal Components
WARNING
This section is for authorized and licensed electrician/water system
installer only. Work behind the front plate secured by screws
must only be carried out under supervision of qualifi ed contractor,
installation engineer or service person.
CAUTION
Open or close the Front Plate carefully.
The heavy Front Plate may injures the
fi ngers.
* The remote control cable is connected
to the front panel, so be careful when
removing the panel.
Open and Close Front Plate
h
1. Remove the 2 mounting screws of Front Plate
h
.
2. Slide it upwards to unhook the Front Plate
h
hook.
3. Reverse above steps 1~2 for close it.
Water Piping Installation
•
Please engage a licensed water circuit installer to install this
water circuit.
•
This water circuit must comply with relevant European and national
regulations (including EN61770), and local building regulation
codes.
•
Ensure the components installed in the water circuit could withstand
water pressure during operation.
•
Do not use worn out tube or detachable hose-set.
•
Do not apply excessive force to pipes that may damage the pipes.
•
Choose proper sealer which can withstand the pressures and
temperatures of the system.
•
Make sure to use two spanners to tighten the connection. Further
tighten the nuts with torque wrench in specifi ed torque as stated
in the table.
•
Cover the pipe end to prevent dirt and dust when inserting it
through a wall.
•
If non-brass metallic piping is used for installation, make sure to
insulate the pipes to prevent galvanic corrosion.
•
Do not connect galvanised pipes, this will cause galvanic corrosion.
•
Use correct nut for all Tank Unit tube connections and clean
all tubes with tap water before installation. See Tube Position
Diagram for detail.
Tube Connector
Nut Size
Torque
a
&
b
RP 1¼"
117.6 N•m
c
&
d
RP ¾"
58.8 N•m
e
&
f
RP 1"
88.2 N•m
Torque wrench Spanner
Hook
2X (screw)
CAUTION
Do not overtighten, overtightening may cause water leakage.
•
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.
•
Failure to connect the tube appropriately might cause the Tank
Unit malfunction.
•
Protection From Frost:
If the Tank Unit is being exposed to frost while power supply failure
or pump operating failure, drain the system. When water is idle
inside the system, freezing up is very likely to happen which could
damage the system. Make sure the power supply is turned off before
draining. Heater Assembly
0
may be damaged under dry heating.
•
Corrosion Resistance:
Duplex stainless steel is naturally corrosion resistant to mains
water supply. No specifi c maintenance is required to maintain this
resistance. However, please note that Tank Unit is not guaranteed
for use with a private water supply.
•
It is recommended to use a tray (fi eld supply) to collect water from
the Tank Unit if water leakage occur.
Recommended piping installation sequence:
(a)
(c)
(e)
(f)
(b)
(d)
(A) Space Heating/Cooling Pipework
•
Connect Tank Unit Tube Connector
a
to outlet connector of Zone 1
Panel/Floor heater.
•
Connect Tank Unit Tube Connector
b
to inlet connector of Zone 1
Panel/Floor heater.
•
Failure to connect the tube appropriately might cause the Tank
Unit malfunction.
•
Refer below table for the rated fl ow rate of each particular
Outdoor Unit.
Model
Rated Flow Rate (l/min)
Cool
Heat
WH-ADC0509L3E5,
WH-ADC0509L3E5AN,
WH-ADC0509L6E5,
WH-ADC0509L6E5AN
WH-WDG05LE5*
14.3
14.3
WH-WDG07LE5*
20.1
20.1
WH-WDG09LE5*
23.5
25.8
* Do not install automatic air purge valves on indoor water pipes.
In the unlikely event that the R290 refrigerant leaks into the
water circuit, there is a risk that the refrigerant will leak indoors.
(B) Circulating Pipework
•
Connect Tank unit Tube Connector
f
to outdoor unit inlet water
socket.
•
Connect Tank Unit Tube Connector
e
to Outdoor unit outlet water
socket.
•
Failure to connect results in an error stop the system.
Model
Water piping between outdoor unit and indoor unit
Inner
diameter
Maximum
length
Insulator
thickness
Maximum
Elevation
WH-WDG05LE5*
ø20
30 m
30 mm
or more
10 m
WH-WDG07LE5*
ø25
WH-WDG09LE5*
