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

1. Safety precautions
1.2. Before installation (relocation)
Caution:
• Be extremely careful when transporting or installing the units. Two or
more persons are needed to handle the unit, as it weighs 20 kg or more.
Do not grasp the packaging bands. Wear protective gloves to remove the
unit from the packaging and to move it, as you can injure your hands on
the  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 stabs or other
injuries.
1.3. Before electric work
Caution:
• Be sure to install circuit breakers. If not installed, electric shock may re-
sult.
• For the power lines, use standard cables of suf cient capacity. Otherwise,
a short circuit, overheating, or  re may result.
• When installing the power lines, do not apply tension to the cables. If the
connections are loosened, the cables can snap or break and overheating
or  re may result.
1.4. Before starting the test run
Caution:
• Turn on the main power switch more than 12 hours before starting opera-
tion. Starting operation just after turning on the power switch can severely
damage the internal parts. Keep the main power switch turned on during
the operation season.
• Before starting operation, check that all panels, guards and other protec-
tive parts are correctly installed. Rotating, hot, or high voltage parts can
cause injuries.
• Do not touch any switch with wet hands. Electric shock may result.
1.5. Using R410A refrigerant outdoor units
Caution:
• Use C1220 copper phosphorus, for copper and copper alloy seamless
pipes, to connect the refrigerant pipes. Make sure the insides of the pipes
are clean and do not contain any harmful contaminants such as sulfuric
compounds, oxidants, debris, or dust. Use pipes with the speci ed thick-
ness. (Refer to 4.1.) Note the following if reusing existing pipes that carried
R22 refrigerant.
- Replace the existing  are nuts and  are the  ared sections again.
- Do not use thin pipes. (Refer to 4.1.)
• Store the pipes to be used during installation indoors and keep both ends
of the pipes sealed until just before brazing. (Leave elbow joints, etc. in
their packaging.) If dust, debris, or moisture enters the refrigerant lines, oil
deterioration or compressor breakdown may result.
• Use ester oil, ether oil, alkylbenzene oil (small amount) as the refrigeration
oil applied to the  ared sections. If mineral oil is mixed in the refrigeration
oil, oil deterioration may result.
Fig. 1-1

2. Installation location

• The base and attachments of the outdoor unit must be periodically
checked for looseness, cracks or other damage. If such defects are left un-
corrected, the unit may fall down and cause damage or injuries.
• Do not clean the outdoor unit with water. Electric shock may result.
• Tighten all  are nuts to speci cation using a torque wrench. If tightened
too much, the  are nut can break after an extended period and refrigerant
can leak out.
• Be 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 prop-
erly grounded, electric shock may result.
• Use circuit breakers (ground fault interrupter, isolating switch (+B fuse),
and molded case circuit breaker) with the speci ed capacity. If the circuit
breaker capacity is larger than the speci ed capacity, breakdown or  re
may result.
• Do not touch the refrigerant pipes with bare hands during operation. The
refrigerant pipes are hot or cold depending on the condition of the  owing
refrigerant. If you touch the pipes, burns or frostbite may result.
• After stopping operation, be sure to wait at least  ve minutes before turn-
ing off the main power switch. Otherwise, water leakage or breakdown may
result.
• Do not use refrigerant other than R410A refrigerant. If another refrigerant is
used, the chlorine will cause the oil to deteriorate.
• Use the following tools speci cally designed for use with R410A refrigerant.
The following tools are necessary to use R410A refrigerant. Contact your
nearest dealer for any questions.
Tools (for R410A)
Gauge manifold
Charge hose
Gas leak detector
Torque wrench
• Be sure to use the correct tools. If dust, debris, or moisture enters the re-
frigerant lines, refrigeration oil deterioration may result.
• Do not use a charging cylinder. If a charging cylinder is used, the compo-
sition of the refrigerant will change and the ef ciency will be lowered.
1.6. Accessories of outdoor unit (Fig. 1-1) (SW160, 200)
The parts show in the left are the accessories of this unit, which are af xed to the
inside of the service panel.
Joint Pipe accessory ......... ×1
(1) Put  are nut which is removed from the Ball Valve on the Joint Pipe accessory
and carry out  are work.
(2) The Joint Pipe accessory and the pipe which is prepared on site must be
brazed in non-oxidation status.
(3) After the pipes are brazed, connect the Joint Pipe accessory to the Ball Valve
which locates within the unit by  are connection.
* Never connect the Joint Pipe accessory to the Ball Valve before brazing.
Some parts may be burnt and it may cause refrigerant leakage.
2.1. Refrigerant pipe (Fig. 2-1)
Check that the difference between the heights of the indoor and outdoor
units, the length of refrigerant pipe, and the number of bends in the pipe
are within the limits shown below.
Pipe length
Model
(one way)
SW40, 50, 75 2 m - 40 m
SW100, 120 2 m - 75 m
SW160, 200 2 m - 80 m
• Height difference limitations are binding regardless of which unit, indoor or out-
Flare tool
Size adjustment gauge
Vacuum pump adapter
Electronic refrigerant charging scale
Height Number of bends
difference (one way)
Max. 10 m Max. 15
Max. 30 m Max. 15
Max. 30 m Max. 15