Panasonic WH-ADC0309H3E Service Manual page 57

11.1.3.3.1 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.
3 Please make flare after inserting the flare nut
onto the copper pipes.
Pipe
Reamer
Point down
Clamp handle
1. To cut 2. To remove burrs
 
Improper flaring
Inclined Surface Cracked Uneven
damaged thickness
11.1.3.4 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.

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.

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
g & h
i & j
Spanner
Handle
Bar
Bar
Yoke
Core
Red arrow mark
3. To flare
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.
Nut Size Torque
RP 1¼" 117.6 N•m
RP ¾" 58.8 N•m
Tank Unit
Torque wrench
Do not overtighten, overtightening may cause gas 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,
0 – 0.5 mm
drain the system. When water is idle inside the
system, freezing up is very likely to happen which
Copper
could damage the system. Make sure the power
pipe
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 Zone 1 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.
Tank Unit
ADC0309H3E5
(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.
Recommended pre-charge pressure of the
o
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.
57
CAUTION
Model Rated Flow Rate (l/min)
Outdoor Unit Cool
UD03HE5-1 9.2
UD05HE5-1 12.9
UD07HE5-1 17.6
UD09HE5-1 20.1
Heat
9.2
14.3
20.1
25.8