Refrigerant Piping - Toshiba HWS-803XWHM3-E Installation Manual

Hydro Unit
The Hydro Unit can be installed directly without using
the fixing angles.
However, the back side of the Hydro Unit can be highly
heated, therefore, the installing surface must be heat-
resistant.
▼ Fig. 7-03
Remove the M5a screws to
detach the fixing angles.
▼ Fig. 7-04
380
Secure the Hydro Unit with
plain washers and nuts.
Install the Hydro Unit so that its tilting angle falls within
the range below.
▼ Fig. 7-06
± 1°
▼ Fig. 7-05
M10
M10
▼ Fig. 7-07
± 1°

Refrigerant Piping

• THIS SYSTEM ADOPTS HFC REFRIGERANT
(R410A) WHICH DOES NOT DESTROY THE
OZONE LAYER.
• The characteristics of R410A refrigerant are: ease to
absorb water, oxidizing membrane or oil, and its
pressure is approximately 1.6 times higher that of
R22. Accompanied with the new refrigerant the oil has
also been changed. Therefore during installation work
prevention of the invasion of water, dust, former
refrigerant or oil is of a paramount importance.
To prevent the charging of incorrect refrigerants into
the system the service valve connection ports have
also increased in size.
• The use of R410A tools is required for correct
installation of the system.
• The use of the correct pipe sizes and wall thicknesses
of copper pipe work is required for the correct
installation of the system.
• Ensure all refrigerant pipes are protected from the
invasion of dust and water.
• Ensure all pipe work connections are tightened to the
required torque settings detailed in this section.
• Perform an air tight using Oxygen Free Nitrogen
(OFN) only.
• Evacuate the air in the pipe work using a vacuum
pump.
• Check for refrigerant gas leaks at all connections
throughout the pipe work.
NOTE
The Air to Water Heat Pump system uses R410A
refrigerant. It is important that copper pipes used for
refrigerant piping have the following wall thickness:
• 0.8 mm for Ø6.4 mm, Ø9.5 mm and Ø12.7 mm
• 1.0 mm for Ø15.9 mm
– 13 –
Installation Manual
WARNING
CAUTION
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