Table Of Contents; Safety Precautions; Before Installation - Mitsubishi Electric PUHZ-W50HA Installation Manual

Contents
1. Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Installation location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Installation procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. Drainage piping work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Note: This symbol mark is for EU countries only.
This symbol mark is according to the directive 2002/96/EC Article 10 Information for users and Annex IV.
Your MITSUBISHI ELECTRIC product is designed and manufactured with high quality materials and components which can be recycled and reused.
This symbol means that electrical and electronic equipment, at their end-of-life, should be disposed of separately from your household waste.
Please, dispose of this equipment at your local community waste collection/recycling centre.
In the European Union there are separate collection systems for used electrical and electronic product.
Please, help us to conserve the environment we live in!
Caution:
• Do not vent R410A into the Atmosphere:
• R410A is a Fluorinated Greenhouse gas, covered by the Kyoto Protocol, with a Global Warming Potential (GWP)=2090.

1. Safety precautions

► Before installing the unit, make sure you read all the "Safety precau-
tions".
Warning:
Precautions that must be observed to prevent injuries or death.
Caution:
Precautions that must be observed to prevent damages to the unit.
Warning:
• The unit must not be installed by the user. Ask an installer or an autho-
rized technician to install the unit. If the unit is installed improperly, water
leakage, electric shock, or fi re may be caused.
• The unit must be installed according to the instructions in order to mini-
mize the risk of damages by earthquakes, typhoons, or strong winds.
An improperly installed unit may fall down and cause damages or injuries.
• The unit must be securely installed on a structure that can sustain its
weight. If the unit is mounted on an unstable structure, it may fall down
and cause damages or injuries.
• If the air to water heat pump is installed in an enclosed area, measures
must be taken to prevent the refrigerant concentration in the room in the
event of refrigerant leakage. Consult an installer regarding the appropriate
measures. Should the refrigerant leak and cause the concentration oxygen
in the room may lack.
• All electric work must be performed by a qualifi ed technician according to
local regulations and the instructions given in this manual. The units must
be powered by dedicated power lines and the correct voltage and circuit
breakers must be used. Power lines with insuffi cient capacity or incorrect
electrical work may result in electric shock or fi re.
• Only the specified cables can be used for wiring. Connections must be
made securely without tension on the terminals. If cables are connected or
installed improperly, It may result in overheating or fi re.
• Terminal block cover panel of the outdoor unit must be fi rmly fi xed. If the
cover panel is mounted improperly, dust and moisture may enter the unit,
and it may cause electric shock or fi re.
• When installing or moving the air to water heat pump, make sure to use the
specifi ed refrigerant (R410A) to charge the refrigerant lines. Do not either mix it
with any other refrigerant or allow air to remain within the pipes. Air enclosed in
the pipes can cause pressure peaks resulting in a rupture and other hazards.
• Make sure to use accessories authorized by Mitsubishi Electric and ask
an installer or an authorized technician to install them. If accessories are
improperly installed, it may cause water leakage, electric shock, or fi re.

1.1. Before installation

Caution:
• Do not use the unit in an unusual environment. If the air to water heat
pump is installed exposed to steam, volatile oil (including machine oil),
or sulfuric gas, or exposed to briny air, or covered with snow, the perfor-
mance can be signifi cantly reduced and the internal parts can be damaged.
• Do not install the unit where combustible gases may leak, be produced,
flow, or accumulate. If combustible gas accumulates around the unit, it
may cause fi re or explosion.
• The outdoor unit produces condensate during the heating operation. Make
sure to provide drainage around the outdoor unit if such condensate is
likely to cause damage.
2
5. Water piping work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
6. Electrical work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
7. Test run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
8. Special function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
After installation, perform the test run to ensure normal operation. Then explain to
your customer the "Safety Precautions," use, and maintenance of the unit based
on the information in the Operation Manual. Both the Installation Manual and the
Operation Manual must be given to the user. These manuals must always be kept
by the actual users.
: Indicates a part which must be grounded.
Warning:
Carefully read the labels attached to the unit.
• Do not remodel the unit. Consult an installer for repairs. If alterations or
repairs are not performed correctly, it may cause water leakage, electric
shock, or fi re.
• The user should never attempt to repair the unit or transfer it to another
location. If the unit is installed improperly, it may cause water leakage,
electric shock, or fi re. If the air to water heat pump needs to be repaired or
moved, ask an installer or an authorized technician.
• After installation has been completed, make sure that refrigerant does not
leak. If refrigerant leaks into the room and comes into contact with the fl ame
of a heater or portable cooking range, poisonous gases will be released.
• Use clean enough water which meets water quality standards. The dete-
rioration of water quality may result in the system breakdown or the water
leakage.
• Never use anything other than water as a medium. It may cause a fi re or an
explosion.
• Do not directly use heated or cooled water that is produced by the air to
water heat pump as drinking and cooking water, or swimming pool. There
is a risk to damage your health. There is also a risk that installing the wa-
ter heat exchanger may corrode if the necessary water quality for the air
to water heat pump system cannot be maintained. If you wish to use the
heated or cooled water from the heat pump for these purposes, take mea-
sure such as to isolate the second heat exchanger within the water piping
system.
• When installing or relocating, or servicing the air conditioner, use only the
specifi ed refrigerant (R410A) to charge the refrigerant lines. Do not mix it
with any other refrigerant and do not allow air to remain in the lines.
If air is mixed with the refrigerant, then it can be the cause of abnormal
high pressure in the refrigerant line, and may result in an explosion and
other hazards.
The use of any refrigerant other than that specified for the system will
cause mechanical failure or system malfunction or unit breakdown. In the
worst case, this could lead to a serious impediment to securing product
safety.
• When installing the unit in a hospital or in a building where communication
equipment is installed, you may need to take measures to reduce noise
and electronic interference. Inverters, home appliances, high-frequency
medical equipment, and radio communications equipment can cause the
air to water heat pump to malfunction or to breakdown. At the same time,
the noise and electronic interference from the air to water heat pump unit
may disturb the proper operation of medical equipment, and communica-
tions equipment.