Panasonic WH-UD05JE5 Service Manual page 71

Apply neutral cure
(Alkoxy type) and
ammonia-free silicone
sealant along the
circumference
Neutral cure (Alkoxy type) & ammonia-free silicone
sealant is only to be applied after pressure testing and
cleaning up by following instructions of sealant, only to
the outside of the connection. The aim is to prevent
moisture from entering the connection joint and
possible occurrence of freezing. Curing sealant will
take some time. Make sure sealant will not peel off
when wrapping the insulation.
12.2.3.4.1 Checking for gas leakage

Check for leakage of gas after air purging.

See the in the installation manual for the outdoor.
12.2.3.5 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
12.2.3.6 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.
Handle
0 – 0.5 mm
Bar
Bar
Yoke
Core
Copper
Red arrow mark
pipe
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.

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
a b

&
c d
&
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
connector of Panel/Floor heater.

Connect Tank Unit Tube Connector
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.
71
Nut Size Torque
RP 1¼" 117.6 N•m
RP ¾" 58.8 N•m
Tank Unit
Spanner
Torque wrench
CAUTION
a
to outlet
b
to inlet