Water Piping - Toshiba MMW-AP0481CHQ-E Installation Manual

REQUIREMENT
• Fix the unit in a horizontal position.
When unit is fixed to slant, it may cause overflow of drainage.
• Install the unit within the dimension according to the figure below.
• Use level gauge or vinyl hose to confirm whether the unit is fix horizontally.
Front view
Set the drain pipe connecting port side
within 5 mm lower than opposite side.
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Side view
0 to 5 mm ± 5 mm
Set the front and air back sides are
within 5 mm wide each other.
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6

Water piping

WARNING
• Install water pipes according to the regulations of respective
countries.
• Install water pipes in the freeze-free place.
• Make sure that water pipes have sufficient pressure resistance. The
design pressure is 1.0 MPa.
CAUTION
• Do not use zinc plated water pipes. When steel pipes are used,
insulate both ends of the pipes.
• Copper pipes are recommended.
• The water to be used must meet the water quality standard specified
in EN directive 98/83 EC.
• After the vacuuming is completed, carry out the following
procedure before adding refrigerant.
Plate heat exchanger may explode because the water in the plate
heat exchanger frozen.
To avoid this phenomenon, ensure that the VRF system is fully
commissioned, including the control system, before filling the water
circuit.
• The hot water module and the buffer/cylinder tank must be installed
on the same floor height.
• The water piping on the inlet side of the hot water module must not be
connected with right-angled loop piping (refer to the figure below).
• When flow switch detects a decrease in the water flow rate, the
outdoor unit stops.
Incorrect
Buffer or
Cylinder
tank
Pump
Incorrect
Buffer or
Cylinder
tank
Pump
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