3 Please make flare after inserting the flare nut
onto the copper pipes.
Water Piping Installation
11.1.3.4
Avoid to use abnormally aggressive water which
does not conform to EN 98/83 EC, hereunder
Chloride content (maximum 250 mg/ litre),
Sulphate content (maximum 250 mg/litre) and
combination of Chloride / Sulphate content
(maximum 300 mg/litre in total).
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.
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 specified torque as stated in the table.
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 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
g
&
h
RP 1¼"
117.6 N•m
i
&
j
RP ¾"
58.8 N•m
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 may be damaged under dry heating.
Corrosion Resistance:
Duplex stainless steel is naturally corrosion
resistant to mains water supply. No specific
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 (field supply) to
collect water from the Tank Unit if water leakage
occur.
(A) Space Heating/Cooling Pipework
Connect Tank Unit Tube Connector
g
to outlet
connector of Panel/Floor heater.
Connect Tank Unit Tube Connector
h
to inlet
connector of Panel/Floor heater.
Failure to connect the tube appropriately might
cause the Tank Unit malfunction.
Refer below table for the rated flow rate of each
particular Outdoor Unit.
Model
Rated Flow Rate (L/min)
Tank Unit
Outdoor Unit
Cool
Heat
ADC0916H9E8
WH-UX09HE8
20.1
25.8
WH-UX12HE8
28.7
34.4
WH-UX16HE8
35.0
45.9
WH-UD09HE8
20.1
25.8
WH-UD12HE8
28.7
34.4
WH-UD16HE8
35.0
45.9
(B) Domestic Hot Water Tank Pipework
It’s strongly recommended to install an expansion
vessel (field supply) in the Domestic Hot Water
Tank circuit. Refer Typical Piping Installation
section to locate the expansion vessel.
o
Recommended pre-charge pressure of the
expansion vessel (field supply) = 0.35MPa
(3.5 bars)
In high water pressure or water supply is above
500kPa, please install the Pressure Reducing
Valve for water supply. If the pressure higher than
that, it might damage the Tank Unit.
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
Cracked Uneven
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
Reamer
Point down
Pipe
Torque wrench
Tank Unit
Spanner
