Lifting Method; Installation Of Unit; Installation; Refrigerant Piping Installation - Mitsubishi Electric City Multi PURY-EP-YJM-A Installation Manual

7. Lifting method

[Fig. 7.0.1] (P.3)
• Use suspension ropes that will withstand the weight of the unit.
• When moving the unit, use a 4-point suspension, and avoid giving impacts
to the unit (Do not use 2-point suspension).
• Place protective pads on the unit where it comes in contact with the ropes to
protect the unit from being scratched.
• Set the angle of roping at 40° or less.
• Use 2 ropes that are each longer than 8 meters.

8. Installation of unit

8.1. Installation

[Fig. 8.1.1] (P.3)
<A> Without detachable leg
M10 anchor bolt procured at the site.
A
Fixing bracket for the hole-in anchor
C
bolt (3 locations to fi x with screws).
• Fix unit tightly with bolts so that unit will not fall down due to earthquakes or
strong winds.
• Use concrete or an angle bracket for the foundation of unit.
• Vibration may be transmitted to the installation section and noise and
vibration may be generated from the fl oor and walls, depending on the
installation conditions. Therefore, provide ample vibrationproofi ng (cushion
pads, cushion frame, etc.).
• Be sure that the corners are fi rmly seated. If the corners are not fi rmly
seated, the installation feet may be bent.
• When using cushion pads, be sure that the full width of the unit is covered.
• The projecting length of the anchor bolt should be less than 30 mm.
• Hole-in anchor bolts are not compatible with this product. However, if fi xing
brackets are mounted on the 4 locations (6 locations: P450, EP350) of the
unit attachment part, hole-in anchor bolts can be used.
[Fig. 8.1.2]
A Screws

9. Refrigerant piping installation

The pipe is connected via a terminal-branch type connection in which refrigerant
piping from the outdoor unit is branched at the terminal and is connected to each
of the indoor units.
The method of pipe connection is as follows: fl are connection for the indoor
units, low-pressure pipes and high-pressure pipes for outdoor units, brazed
connection. Note that the branched sections are brazed.
Warning:
Always use extreme care to prevent the refrigerant gas from leaking while
using fi re or fl ame. If the refrigerant gas comes in to contact with a fl ame
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.

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) = 1975.
9.1. Caution
This unit uses refrigerant R410A. Follow the local regulations on materials and
pipe thickness when selecting pipes. (Refer to the table below.)
1 Use the following materials for refrigeration piping.
• Material: Use copper alloy seamless pipes made of phosphorus
deoxidized copper. Ensure the inner and outer surfaces of the pipes
are clean and free from hazardous sulfur, oxide, dusts, shaving
particles, oils, and moisture (contamination).
• Size: Refer to item 9.2. for detailed information on refrigerant piping
system.
2 Commercially available piping often contains dust and other materials.
Always blow it clean with a dry inert gas.
3 Use care to prevent dust, water or other contaminants from entering the
piping during installation.
<B> With detachable leg
Corner is not seated.
B
Detachable leg
D
• Place protective padding at the corners of the product to protect the product
from scratches or dents that might be caused by the rope.
Caution:
Be very careful when carrying/moving the product.
- When installing the outdoor unit, suspend the unit at the specifi ed location of
the unit base. Stabilize as necessary so that it does not move to the side and
support it at 4 points. If the unit is installed or suspended with 3-point support,
the unit may become unstable and fall.
• The detachable leg can be removed at the site.
• Detaching the detachable leg
Loosen the three screws to detach the detachable leg (Two (three: P450,
EP350) each in the front and back).
If the base leg fi nish is damaged when detaching, be sure to repair at the
site.
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 strong winds and
earthquakes.
Any installation defi ciency may cause unit to fall down, resulting in a
personal injury.
When building the foundation, give full attention to the fl oor strength, drain water
disposal <during operation, drain water fl ows out of the unit>, and piping and
wiring routes.
Precautions when routing the pipes and wires below the unit (Without
detachable leg)
When routing the pipes and wires below the unit, be sure that the foundation and
base work do not block the base through-holes. Also make sure the foundation
is at least 100 mm high so that the piping can pass under the unit.
4 Reduce the number of bending portions as much as possible, and make
bending radii as big as possible.
5 For indoor and outdoor branching and merging section, be sure to use the
following twinning pipe sets and merge pipe sets (sold separately).
Indoor twinning pipe kit Indoor junction pipe kit
model
Line branch
Total indoor model
Lower stream unit model
Less than 80 in total
CMY-Y102S-G2
Outdoor twinning kit model
Total outdoor model Total outdoor model
P500 ~ P650YSJM-A P700 ~ P800YSJM-A
P400 ~ P600YSJM-A1 P700YSJM-A1
EP400 ~ EP600YSJM-A
EP500YSJM-A1
CMY-R100VBK CMY-R200VBK
Copper pipe size and radial thickness for R410A CITY MULTI.
Size (mm) Size (inch) Radial thickness (mm)
ø6.35 ø1/4"
ø9.52 ø3/8"
ø12.7 ø1/2"
ø15.88 ø5/8"
*ø19.05 ø3/4"
*ø19.05 ø3/4"
ø22.2 ø7/8"
ø25.4 ø1"
ø28.58 ø1-1/8"
ø31.75 ø1-1/4"
ø34.93 ø1-3/8"
ø41.28 ø1-5/8"
* Both pipe types can be used for pipe size ø19.05 (3/4 inch) for R410A air
conditioner.
model
P100 ~ P250
CMY-R160-J1
Total outdoor model Total outdoor model
P800YSJM-A1 P850, P900YSJM-A
EP650, EP700YSJM-A
EP600YSJM-A1
CMY-R100XLVBK CMY-R200XLVBK
Pipe type
0.8 Type-O
0.8 Type-O
0.8 Type-O
1.0 Type-O
1.2 Type-O
1.0 Type-1/2H or H
1.0 Type-1/2H or H
1.0 Type-1/2H or H
1.0 Type-1/2H or H
1.1 Type-1/2H or H
1.2 Type-1/2H or H
1.4 Type-1/2H or H
15