Installation Conditions - Toshiba HWT-401HW-E Installation Manual

Outdoor Unit
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Refrigerant Piping
R32 refrigerant
CAUTION
• Incomplete flaring may cause refrigerant gas leakage.
• Do not re-use flares. Use new flares to prevent
refrigerant gas leakage.
• Use flare nuts that are included with the unit. Using
different flare nuts may cause refrigerant gas leakage.
Use the following item for the refrigerant piping.
Material : Seamless phosphorous deoxidized
copper pipe.
Ø6.35, Ø9.52, Ø12.7 Wall thickness 0.8 mm or more
Ø15.88 Wall thickness 1.0 mm or more
REQUIREMENT
When the refrigerant pipe is long, provide support
brackets at intervals of 2.5 to 3 m to clamp the refrigerant
pipe. Otherwise, abnormal sound may be generated.
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Installation
conditions
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Before installation
Be sure to prepare to the following items before
installation.
Length of refrigerant pipe
Length of refrigerant pipe
connected to Hydro / Item
Outdoor Unit
Addition of refrigerant at the
local site is unnecessary for
refrigerant pipe length up to
8 m*. If the refrigerant pipe
5 to 30 m
length exceeds 8 m*, add
refrigerant in the amount
given in "Replenshing
refrigerant"
Caution during addition of refrigerant. Charge the
refrigerant accurately. Overcharging may cause
serious trouble with the compressor.
• Do not connect a refrigerant pipe that is shorter than
5 m.
This may cause a malfunction of the compressor or
other devices.
* HWT-40, 60: 20 m
13-EN
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Airtight test
1. Before starting an airtight test, further tighten the
spindle valves on the gas and liquid sides.
2. Pressurize the pipe with nitrogen gas charged from
the service port to the design pressure (4.15 MPa*)
to conduct an airtight test.
3. After the airtight test is completed, evacuate the
nitrogen gas.
* HWT-801/1101H(R)W-E: 4.6 MPa
Air purge
• To purge air, use a vacuum pump.
• Do not use refrigerant charged in the Outdoor Unit to
purge air. (The air purge refrigerant is not contained
in the Outdoor Unit.)
Electrical wiring
• Be sure to fix the power wires and Hydro / Outdoor
connecting wires with clamps so that they do not
come into contact with the cabinet, etc.
Earthing
WARNING WARNING
Make sure that proper earthing is provided.
Improper earthing may cause an electric shock. For
details on how to check earthing, contact the dealer who
installed the Air to Water Heat Pump or a professional
installation company.
• Proper earthing can prevent charging of electricity on
the Outdoor Unit surface due to the presence of a
high frequency in the frequency converter (inverter)
of the Outdoor Unit, as well as prevent electric
shock. If the Outdoor Unit is not properly earthed,
you may be exposed to an electric shock.
• Be sure to connect the earth wire. (Grounding
work)
Incomplete earthing can cause an electric shock. Do
not connect earth wires to gas pipes, water pipes,
lightning rods or earth wires for telephone wires.
Test run
Turn on the leakage breaker at least 12 hours before
starting a test run to protect the compressor during
startup.
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Installation location
WARNING WARNING
Install the Outdoor Unit properly in a location that is
durable enough to support the weight of the Outdoor
Unit.
Insufficient durability may cause the Outdoor Unit to fall,
which may result in injury.
Pay special attention when installing the unit onto a wall
surface.
CAUTION
Do not install the Outdoor Unit in a location that is
subject to combustible gas leaks.
Accumulation of combustible gas around the Outdoor
Unit may cause a fire.
Install the Outdoor Unit in a location that meets the
following conditions after the customer's consent
is obtained.
• A well-ventilated location free from obstacles near
the air inlets and air outlet.
• A location that is not exposed to rain or direct
sunlight.
• A location that does not increase the operating noise
or vibration of the Outdoor Unit.
• A location that does not produce any drainage
problems from discharged water.
• A degree of ventilation shall continue during the
period that the work is carried out.
• The ventilation should safely disperse any released
refrigerant and preferably expel it externally into the
atmosphere.
Do not install the Outdoor Unit in the following
locations.
• A location with a saline atmosphere (coastal area) or
one that is full of sulfide gas (hot-spring area)
(Special maintenance is required).
• A location subject to oil, vapor, oily smoke, or
corrosive gases.
• A location in which organic solvent is used.
• Places where iron or other metal dust is present. If
iron or other metal dust adheres to or collects on the
interior of the Air to Water Heat Pump, it may
spontaneously combust and start a fire.
• A location where high-frequency equipment
(including inverter equipment, private power
generator, medical equipment, and communication
equipment) is used (Installation in such a location
may cause malfunction of the Air to Water Heat
Pump, abnormal control or problems due to noise
from such equipment).
• A location in which the discharged air of the Outdoor
Unit blows against the window of a neighboring
house.
Installation Manual
• A location where the operating noise of the Outdoor
Unit is transmitted.
• When the Outdoor Unit is installed in an elevated
position, be sure to secure its feet.
• A location in which drain water poses any problems.
CAUTION
1. Install the Outdoor Unit in a location where the
discharge air is not blocked.
2. When an Outdoor Unit is installed in a location that is
always exposed to strong winds like a coast or on the
high stories of a building, secure normal fan
operation by using a duct or wind shield.
3. When installing the Outdoor Unit in a location that is
constantly exposed to strong winds such as on the
upper stairs or rooftop of a building, apply the
windproofing measures referred to in the following
examples.
1) Install the unit so that its discharge port faces the
wall of the building.
Keep a distance 500 mm or more between the
unit and wall surface.
500 mm
Wall
2) Consider the wind direction during the operational
season of the Air to Water Heat Pump, and install
the unit so that the discharge port is set at a right
angle relative to the wind direction.
Strong wind
Strong wind
• When using an Air to Water Heat Pump under low
outside temperature conditions, prepare a duct or
snow hood so that it is not affected by the snow.
<Example>
Snow hood
14-EN