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Water Piping Installation
3
General Notes
3
3.1
Tank Unit Refrigerant Piping Installation
Nominal diameters of the junction pipes (refrigerant pipe diameter of the connecting pipe may
vary). Please refer to chapter 4 for Refrigerant connecting pipes.
24
Water Piping Installation
● Please request a licensed technician to install this water circuit.
● This water circuit must comply with all relevant European and national regulations,
i.e. IEC/EN 61770 European Council Directive 98/83 EC.
● Be careful not to deform the piping with excessive force when doing piping connection
job.
● When connecting pipes to tank, always use brass between pipe and tank sleeve to pre-
vent corrosion between base material.
● Choose proper sealer which can withstand the pressures and temperatures of the sys-
tem. When tank is to be connected ensure the pipings are clean before water piping
installation is carried out.
● Water operating pressures DHW tank (Minimum ~ Maximum): 0.05 MPa – 0.95 MPa
1. Please make flare after inserting flare nut (located at joint portion of tube assembly) onto
the copper pipe. (In case of using long piping)
2. Do not use pipe wrench to open refrigerant piping. Flare nut may be broken and cause
leakage. Use proper spanner or ring wrench.
3. Connect the piping:
● Align the centre of piping and sufficiently tighten the flare nut with fingers.
● Further tighten the flare nut with torque wrench in specified torque as stated in the
table.
Model
PAW-VP1000LDHW
PAW-VP750LDHW
PAW-VP380L
Piping size (Braising tank)
Gas
Liquid
3/4" [19.05 mm]
1/2" [12.7 mm]
3/4" [19.05 mm]
1/2" [12.7 mm]
3/4" [19.05 mm]
1/2" [12.7 mm]
DHW PAW-VP - Installation manual – 2020-05
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