– 15 –
Hydro Unit
Installation Manual
Refrigeration pipe
The length and height of the refrigeration pipe must be
within the following values.
As long as the Hydro Unit is installed within these
ranges, no additional refrigerant is required.
▼
Fig. 7-08
Refrigerant pipe sizes
Flaring
• Cut the refrigerant pipes to the correct length using a
pipe cutter. Remove any burrs that may be on the
pipes as these may cause refrigerant leaks or
component failure in the refrigeration cycle.
• Place the correct size flare nuts onto the pipes (use
the flare nuts supplied with the Hydro Unit or use
flare nuts designed specifically for R410A
refrigerant) and then flare the pipes using the correct
flaring tool.
Tightening
• Connect the refrigerant pipes, from the outdoor unit,
to the Hydro Unit as shown below.
▼
Fig. 7-09
• Align the flare connection on each pipe with the
corresponding outlet connection on the Hydro Unit.
Tighten the flare nuts, using fingers, to secure the
pipes in place.
• Tighten the flare nuts, using a torque wrench, to the
tightening torques shown below:
• To prevent damage, to the refrigerant pipes, use two
spanners to tighten the flare nut connections to the
required torque.
Water pipe
WARNING
• Install water pipes according to the regulations of
respective countries.
• Install water pipes in a freeze-free place.
• Make sure that water pipes have sufficient pressure
resistance.
The setting value of the overpressure preventive valve
is 0.43 MPa. (4.3 bar)
CAUTION
• Do not use zinc plated water pipes. When steel pipes
are used, insulate both ends of the pipes.
• The water to be used must meet the water quality
standard specified in EN directive 98/83 EC.
Hydro Unit
Model
H:Max
L:Max L:Min
4.5 kW
Hydro Unit
±10 m
(above or below)
15 m
5 m
8 & 14 kW
Hydro Unit
±30 m
(above or below)
30 m
5 m
Hydro Unit Model
Gas Side (mm)
Liquid Side
(mm)
4.5 kW Hydro Unit
Ø 12.7
Ø 6.35
8 & 14 kW Hydro Unit
Ø 15.88
Ø 9.52
H
L
Outdoor unit
Outer Ø of Copper Pipe
(mm)
Tightening Torque (N/m)
Ø 6.35
14 to 18
Ø 9.52
33 to 42
Ø 12.7
50 to 62
Ø 15.88
63 to 77
Liquid line
Gas line
15-EN
Summary of Contents for HWS-1405XWHM3-E
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