7
ENGLISH
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 Bottom Front Plate may injures
the fi ngers.
Hook
2X (screw)
Open and Close Front Plate
e
1. Remove the 2 mounting screws of Bottom Front Plate
e
.
2. Slide it upwards to unhook the Bottom Front Plate
e
hook.
3. Reverse above steps 1~2 for close it.
Refrigerant Piping Installation
This Tank Unit is designed for combination with Panasonic
Air-to-Water Heat Pump Outdoor Unit. If Outdoor Unit from
other manufacturer are being used in combination with
Panasonic Tank Unit, optimum operation and reliability of
the system is not guaranteed. Thus warranty cannot be
given in such case.
Spanner
Torque
wrench
1. Connect Tank Unit to Air-to-Water Heatpump Outdoor
Unit with correct piping size. Use Reducing Adapter
2
for Outdoor Unit WH-UD03JE5 and WH-UD05JE5
Refrigerant Gas
k
piping connection.
Model
Piping size (Torque)
Use Reducing
Adapter
2
Tank Unit
Outdoor Unit
Gas
Liquid
WH-ADC0309J3E5UK
WH-UD03JE5,
WH-UD05JE5
ø12.7mm (1/2")
[55 N•m]
ø6.35mm (1/4")
[18 N•m]
Yes
WH-UD07JE5,
WH-UD09JE5
ø15.88mm (5/8")
[65 N•m]
ø6.35mm (1/4")
[18 N•m]
No
CAUTION
Do not overtighten, overtightening may cause gas leakage.
Do not pull and push refrigerant piping excessively. Deformed
pipe may cause refrigerant leak.
2. Please make fl are after inserting fl are nut (located at joint portion of
tube assembly) onto the copper pipe. (In case of using long piping)
3. Do not use pipe wrench to open refrigerant piping. Flare nut may
be broken and cause leakage. Use proper spanner or ring wrench.
4. Connect the piping:
•
Align the centre of piping and suffi ciently tighten the fl are nut
with fi ngers.
•
Further tighten the fl are nut with torque wrench in specifi ed
torque as stated in the table.
Additional Precautions For R32 Models when connecting by fl aring
at indoor side
Ensure to do the re-fl aring of pipes before connecting to units
to avoid leaking.
Connections made between components of refrigerant
system shall be accessible for ease of maintenance.
Seal suffi ciently the fl are nut (both gas and liquid sides) with neutral
cure (Alkoxy type) & ammonia-free silicone sealant and insulation
material to avoid the gas leak caused by freezing.
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.
Checking for gas leakage
•
Check for leakage of gas after air purging.
•
See the in the installation manual for the outdoor.
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 fl are after inserting the fl are nut onto the copper pipes.
1. To cut
2. To remove burrs
3. To fl are
Bar
Red arrow mark
Handle
Core
Yoke
Clamp handle
Bar
0 – 0.5 mm
Copper
pipe
Reamer
Point down
Pipe
When properly fl ared, the internal surface
of the fl are will evenly shine and be of even
thickness. Since the fl are part comes into
contact with the connections, carefully check
the fl are fi nish.
Improper fl aring
Inclined Surface
damaged
Cracked Uneven
thickness
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 specifi ed 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
Torque wrench
Tank Unit
Spanner
