Installation Location - Mitsubishi Electric PUHZ-W HA Series Installation Manual

1. Safety precautions
1.2. Before installation (relocation)
Caution:
• Be fully careful when moving the units. The unit must be carried by at least
2 people, as it weighs 20 kg or more. Do not hold the packaging bands. Wear
protective gloves to unpack and to move or install it, in order to avoid your
hands being injured by fi ns or the edge of other parts.
• Be sure to safely dispose of the packaging materials. Packaging materials,
such as nails and other metal or wooden parts may cause injuries.
1.3. Before electric work
Caution:
• Be sure to install a circuit breaker. If it is not installed, there may be a risk of
an electric shock.
• For the power lines, use standard cables of suffi cient capacity. Otherwise,
it may cause a short circuit, overheating, or fi re.
• When installing the power lines, do not apply tension to the cables. The
cables may be cut or overheated resulting in a fi re.
1.4. Before starting the test run
Caution:
• Turn on the main power switch more than 12 hours before starting opera-
tion. Starting operation immediately after turning on the power switch can
severely damage the internal parts. Keep the main power switch turned on
during the operating period.
• Before starting operation, check that all panels, guards and other protective
parts are correctly installed. Make sure not to get injured by touching rotat-
ing, hot, or high voltage parts.
1.5. Using R410A refrigerant air to water heat pump
Caution:
• Use only R410A refrigerant. If another refrigerant is used, the chlorine will
let the oil deteriorate.
• Use the following tools specifi cally designed for R410A refrigerant use.
Contact your nearest installer for further details.
Tools (for R410A)
Gauge manifold
Gas leak detector
Torque wrench

2. Installation location

Models A
50
85
112 1350
140 1350
Charge hose
Vacuum pump adapter
Electronic refrigerant charging scale
Fig. 2-1
B C
(mm) (mm) (mm)
740 950 175
943 950 175
1020 210
1020 210
• The base of the outdoor unit must be periodically checked to ensure it is not
loose, cracked or damaged. If such defects are left untreated, the unit may
fall down and cause damage or injuries.
• Do not wash the air to water heat pump unit. You may receive an electric
shock.
• Make sure to ground the unit. Do not connect the ground wire to gas or
water pipes, lightning rods, or telephone grounding lines. If the unit is not
properly grounded, there may be a risk to get an electric shock.
• Make sure to use circuit breakers (ground fault interrupter, isolating switch
(+B fuse), and molded case circuit breaker) with the specifi ed capacity. If
the circuit breaker capacity is larger than the specifi ed capacity, breakdown
or fi re may result.
• Do not touch any switch with wet hands. There may be a risk of an electric
shock.
• Do not touch the refrigerant pipes with bare hands while unit is running.
The refrigerant pipes can be hot or cold depending on the condition of the
fl owing refrigerant. There may be a risk to get burn or frostbite.
• After stopping operation, make sure to wait at least fi ve minutes before
turning off the main power. Otherwise, it may cause water leakage or break-
down.
• Be sure to use the proper tools. If dust, debris, or moisture enters the refrig-
erant pipes, the refrigeration oil may deteriorate.
• Do not use a charging cylinder. If a charging cylinder is used, the composi-
tion of the refrigerant may change and the effi ciency will be worsened.
(mm) 2.1. Choosing the outdoor unit installation location
• Avoid locations where the unit is exposed to direct sunlight or other sources of
heat.
• Select a location where noise emitted by the unit does not disturb neighbors.
• Select a location where easy wiring and pipe access to the power source is avail-
able.
• Avoid locations where combustible gases may leak, be produced, fl ow, or accu-
mulate.
• Note that condensate water may be produced by the unit during operation.
• Select a level location that can bear the weight and vibration of the unit.
• Avoid locations where the unit can be covered with snow. In areas where heavy
snow fall is anticipated, special precautions must be taken to prevent the snow
from blocking the air intake such as to install the unit at higher position or installing
a hood on the air intake. This can reduce the airfl ow and the unit may not operate
properly.
• Avoid locations where the unit is exposed to oil, steam, or sulfuric gas.
• Make sure to hold the handles to transport the unit. Do not hold the base of the
unit, as there is a risk that hands or fi ngers may be pinched.
2.2. Outline dimensions (Outdoor unit) (Fig. 2-1)
3