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5. Lifting method and weight of product
[Fig. 5.0.1] (P.2)
Caution:
Be very careful to carry product.
- Do not have only one person to carry product if it is more than 20 kg [46 LBS].
- PP bands are used to pack some products. Do not use them as a mean for transportation because they are dangerous.
- Do not touch heat exchanger fins with your bare hands. Otherwise you may get a cut in your hands.
- Tear plastic packaging bag and scrap it so that children cannot play with it. Otherwise plastic packaging bag may suffocate children to death.
- When carrying in outdoor unit, be sure to support it at four points. Carrying in and lifting with 3-point support may make outdoor unit unstable, resulting in a fall of it.
6. Installation of unit
6.1. Installation
[Fig. 6.1.1] (P.2)
A M10 anchor bolt procured at the site.
•
Fix unit tightly with bolts so that unit will not fall down due to earthquake or
gust.
•
Use concrete or angle for foundation of unit.
•
Vibration may be transmitted to the installation section and noise and vibration
may be generated from the floor and walls, depending on the installation con-
ditions. Therefore, provide ample vibrationproofing (cushion pads, cushion
frame, etc.).
•
Be sure that the corners are firmly seated. If the corners are not firmly seated,
the installation feet may be bent.
Warning:
•
Be sure to install unit in a place strong enough to withstand its weight.
Any lack of strength may cause unit to fall down, resulting in a personal
injury.
•
Have installation work in order to protect against a strong wind and earth-
quake.
7. Refrigerant piping installation
Connecting the piping is a terminal-branch type in which refrigerant piping from
the outdoor unit is branched at the terminal and connected to each of the indoor
units.
The method of connection consists of flare connections at the indoor units, flange
connections for the piping of the outdoor unit and flare connections for the liquid
piping. Note that the branched sections are brazed.
Warning:
Always use extreme care to prevent the refrigerant gas (R22) from leaking
while using fire or flame. If the refrigerant gas comes in contact with the
flame from any source, such as a gas stove, it breaks down and generates a
poisonous gas which can cause gas poisoning. Never weld in an unventilated
room. Always conduct an inspection for gas leakage after installation of the
refrigerant piping has been completed.
7.1. Caution
1 Commercially available piping often contains dust and other materials. Always
blow it clean with a dry inert gas.
2 Use care to prevent dust, water or other contaminants from entering the piping
during installation.
3 Reduce the number of bending portions as much as possible, and make bend-
ing radius as big as possible.
4 Always observe the restrictions on the refrigerant piping (such as rated length,
the difference between high/low pressures, and piping diameter). Failure to do
so can result in equipment failure or a decline in heating/cooling performance.
5 The City Multi Series Y will stop due an abnormality due to excessive or insuf-
ficient coolant. At such a time, always properly charge the unit. When servic-
ing, always check the notes concerning pipe length and amount of additional
refrigerant at both locations, the refrigerant volume calculation table on the
back of the service panel and the additional refrigerant section on the labels
for the combined number of indoor units.
6 Use liquid refrigerant to fill the system.
7 Never use refrigerant to perform an air purge. Always evacuate using a vacuum
pump.
8 Always insulate the piping properly. Insufficient insulation will result in a de-
cline in heating/cooling performance, water drops from condensation and other
such problems.
Any installation deficiency may cause unit to fall down, resulting in a
personal injury.
When building the foundation, give full attention to the floor strength, drain water
B Corner is not seated.
disposal <during operation, drain water flows out of the unit>, and piping and wir-
ing routes.
Down piping and down wiring precautions
When down piping and down wiring are performed, be sure that foundation and
base work does not block the base through holes. When down piping is performed,
make the foundation at least 100 mm [3-15/16 in] high so that the piping can pass
under the bottom of the unit.
[Fig. 6.1.2] (P.2)
6.2. Connecting direction for refrigerant pip-
[Fig. 6.2.1] (P.2)
9 When connecting the refrigerant piping, make sure the ball valve of the out-
door unit is completely closed (the factory setting) and do not operate it until
the refrigerant piping for the outdoor and indoor units has been connected, a
refrigerant leakage test has been performed and the evacuation process has
been completed.
0 Always use a non-oxidizing brazing material for brazing the parts. If a non-
oxidizing brazing material is not used, it could cause clogging or damage to
the compressor unit.
A Never perform outdoor unit piping connection work when it is raining.
When installing and moving the unit, do not charge it with refrigerant other
than the refrigerant specified on the unit.
- Mixing of a different refrigerant, air, etc. may cause the refrigerant cycle to mal-
function and result in severe damage.
•
Store the piping to be used during installation indoors and keep both
ends of the piping sealed until just before brazing.
- If dust, dirt, or water gets into the refrigerant cycle, the oil will deteriorate and
•
Do not use special detergents for washing piping.
7.2. Refrigerant piping system
Connection Example
[Fig. 7.2.1] (P.3)
A Bottom piping through hole
C (bolt hole for old models)
ing
Warning:
Caution:
the compressor may fail.
Å Liquid pipe
Ç Downstream Unit Model Total
‰ Brunch Kit Model
Ì 7-Branching Header
A Outdoor Unit
B Indoor unit (08-48)
B (bolt hole)
D Bottom wiring through hole
ı Gas pipe
Î Model number
Ï 4-Branching Header
Ó 10-Branching Header
B First Branch
D Cap
7
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