Refrigeration Pipe; Water Pipe; Tightening - Toshiba HWT-601XWHM3W-E Installation Manual

Hydro Unit

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.7-06
Outdoor Unit
Hydro Unit
H:Max L:Max L:Min
Model
±30 m
HWT-60 30 m
(above or below)
±30 m
HWT-110 30 m
(above or below)
Refrigerant pipe sizes
Liquid Side
Hydro Unit Model Gas Side (mm)
HWT-60 Ø 12.7
HWT-110 Ø 15.88
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 R32 refrigerant)
and then flare the pipes using the correct flaring tool.
17-EN

Tightening

• Connect the refrigerant pipes, from the Outdoor Unit,
to the Hydro Unit as shown below.
▼Fig.7-07
Liquid line
• 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.
5 m
• Tighten the flare nuts, using a torque wrench, to the
tightening torques shown below:
5 m
Outer Ø of Copper Pipe
Tightening Torque (N/m)
(mm)
Ø 6.35
Ø 12.7
(mm)
Ø 15.88
Ø 6.35
• To prevent damage, to the refrigerant pipes, use two
Ø 6.35
spanners to tighten the flare nut connections to the
required torque.
■

Water pipe

WARNING 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.
– 9 –
Water pipe
Design the water pipe length within the QH
characteristics of the pump (Refer to "Fig.7-14 " and
""Fig.7-15" on page 10").
The height of the pipe must be 7 m or less.
▼Fig.7-08
Gas line
Water circuit
• Install a strainer with 30 to 40 meshes (locally
procured) at the water inlet of the Hydro Unit.
14 to 18 • Install drain cocks (locally procured) for water charge
and discharge at the lower part of the Hydro Unit.
50 to 62
• Make the piping route a closed circuit. (An open
63 to 77
water circuit may cause a failure.)
▼Fig.7-09
H < 7 m
▼Fig.7-10
Strainer (30 to 40
meshes)
Drain cock for
water charge
and discharge
Installation Manual
Hot water outlet
connection
Water inlet connection
Inlet
Isolating Ball Valve
Local arrangement
18-EN