Installation Place; Refrigerant Piping Connection - Toshiba HWS-455H-E Installation Manual

Installation Place

• A place which provides the spaces around the outdoor unit as shown in
the diagram
• A place which can bear the weight of the outdoor unit and does not allow
an increase in noise level and vibration
• A place where the operation noise and discharged air do not disturb your
neighbors
• A place which is not exposed to a strong wind
• A place free of a leakage of combustible gases
• A place which does not block a passage
• When the outdoor unit is to be installed in an elevated position, be sure to
secure its feet.
• A place where the drain water does not raise any problems
CAUTION
1. Install the outdoor unit without anything blocking the air discharging.
2. When the outdoor unit is installed in a place always exposed to strong
wind like a coast or on a high storey of a building, secure the normal fan
operation using a duct or a windshield.
3. In particularly windy areas, install the unit such as to avoid admission of
wind.
4. Installation in the following places may result in trouble.
Do not install the unit in such places.
• A place full of machine oil
• A saline-place such as the coast
• A place full of sulfi de gas
• A place where high-frequency
waves are likely to be generated
as from audio equipment, welders,
and medical equipment

Refrigerant Piping Connection

Flaring
1. Cut the pipe with a pipe cutter.
90°
2. Insert a fl are nut into the pipe and fl are the pipe.
• Projection margin in fl aring : A (Unit : mm)
Rigid (clutch type)
Outer dia.
R410A tool used
of copper pipe
Ø6.35
Ø12.70
Imperial (wing nut type)
A
Outer dia. of copper pipe
Die
Pipe
Strong
wind
Obliquity Roughness
Conventional tool
used
0 to 0.5 1.0 to 1.5
0 to 0.5 1.0 to 1.5
R410A
Ø6.35 1.5 to 2.0
Ø12.70 2.0 to 2.5
Refrigerant pipe length
Refrigerant pipe
H: max. ±10 m (above / below)
L: max. 15 m, min 5 m
15 m chargeless
Tightening connection
Align the centers of the connecting pipes and tighten the fl are nut as far as
possible with your fi ngers. Then tighten the nut with a spanner and torque
wrench as shown in the fi gure.
Externally
threaded side
Use a wrench to secure.
CAUTION
Do not apply excess torque. Otherwise, the nut may crack depending on
the conditions.
Warp
Outer dia. of copper pipe
Ø6.35 mm
Ø12.70 mm
• Tightening torque of fl are pipe connections
The operating pressure of R410A
is higher than that of R22 (approx.
1.6 times). It is therefore necessary
to fi rmly tighten the fl are pipe
connecting sections (which connect
the hydro and outdoor units) up to the
specifi ed tightening torque. Incorrect
connections may cause not only a
gas leakage, but also damage to the
refrigeration cycle.
Shaping pipes
1. How to shape the pipes
Shape the pipes along the incused line on
the outdoor unit.
2. How to fi t position of the pipes
Put the edges of the pipes to the place with
a distance of 85 mm from the incused line.
8
Hydro Unit
Outdoor unit
Half union Flare nut
Use a torque wrench to tighten.
14 to 18 (1.4 to 1.8 kgf·m)
50 to 62 (5.0 to 6.2 kgf·m)
15 m chargeless
Internally
threaded side
(Unit : N·m)
Tightening torque
Flare at hydro
unit side
Flare at outdoor
unit side
Incused line