Piping Installation - Panasonic WH-MDC09C3E5 Servise Manual

11.3. Piping Installation

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.
Please engage a licensed water circuit installer to install this water circuit.
• The minimum requirement of water in the system is 50 litres. If this value could not be achieved, please install additional buffer
tank (field supply).
• 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 apply excessive force to piping that may damage the pipes.
• Do not install any valve between Mono bloc unit and water piping to avoid accidental closure of water supply to the Mono bloc
unit.
• Use Rp 1 ¼" nut for both water inlet and water outlet connection and clean all piping with tap water before install.
• If old heat pump terminal / tank is utilized, please clean the dust properly before installation.
• Refer Diagram 3.1 for installation of 3-way Valve Kit.
• Must install an external filter (30 mesh or more, field supply) before water inlet connector of Mono bloc unit (indicate with
"WATER IN").
• Connect the external of Mono bloc unit (indicate with "WATER OUT") to boiler tank inlet. Fail to connect the tube appropriately
might causing the Mono bloc unit malfunction.
• 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.
• If non-brass metallic piping is used for installation, make sure to insulate the piping to prevent galvanic corrosion.
• Do not use worn out piping.
• Make sure to insulate the water circuit piping (insulator thickness : 20mm or more) to prevent condensation during cooling
operation and reduction of heating capacity, as well as avoid freezing of the outdoor water circuit piping during winter season.
• After installation, check the water leakage condition in connection area during test run.
Model
WH-MDC09C3E5
WH-MDC12C6E5
WH-MDC14C6E5
WH-MDC16C6E5
41
Nut size (Torque)
Water
RP 1 1/4" [117.6 N•m]