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11.2.3 Piping Installation
11.2.3.1 Water Quality Requirement
Must use water that complies with European water quality
standard 98/83 EC. The lifespan of the Tank Unit will be shorter if
groundwater (include spring water and well water) is used.
The Tank Unit shall not be used with the tap water containing
contaminants such as salt, acid, and other impurities which may
corrode the tank and its component.
11.2.3.2 Typical
Piping Installation
Main
Supply
Fan Coil Unit
2-Way Valve
Tab /
Shower
Multi Split Heat Pump
Outdoor Unit
Temporary
connection to
be removed
immediately
after filling
Double
Check Valve
assembly is
acceptable
in house
Expansion
Vessel
Radiator /
Floor Heater
Tank Water
Discharge
Drain/Tundish
Pressure
Reducing
Valve
Shut
Off
Valve
Check
Valve
Drain
Water
Drain
Water
11.2.3.3 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 qualified
contractor, installation engineer or service person.
CAUTION
Open or close the Front Plate carefully.
The heavy Front Plate may injures the
fingers.
Hook
2X (screw)
Open and Close Front Plate
⑯
1 Remove the 2 mounting screws of Front Plate
⑯
.
2 Slide it upwards to unhook the Front Plate
⑯
hook.
3 Reverse above steps 1~2 for close it.
11.2.3.4 Refrigerant
Piping
Installation
This Tank Unit is designed for combination with
Panasonic Multi Split 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.
1 Connect Tank Unit to Multi Split Heat Pump
Outdoor Unit with correct piping size.
Spanner
Torque
wrench
Model
Piping size (Torque)
Tank Unit
Outdoor Unit
Gas
Liquid
WH-
ADF0309J3E5CM
CU-
2WZ71YBE5
ø12.7mm
(1/2")
[55 N•m]
ø6.35mm
(1/4")
[18 N•m]
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 flare after inserting flare 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:
o
Align the centre of piping and sufficiently
tighten the flare nut with fingers.
o
Further tighten the flare nut with torque
wrench in specified torque as stated in
the table.
Additional Precautions For R32 Models when
connecting by flaring at indoor side
Ensure to do the re-flaring of pipes before connecting to
units to avoid leaking.
Connections made between components of refrigerant
system shall be accessible for ease of maintenance.
Seal sufficiently the flare 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.
