Mitsubishi Electric CITY MULTI CMB-WP108NU-AA Manual De Instalación página 4

2. Selecting an installation site
2.1. About the product
• This unit uses R410A-type refrigerant.
• Indoor units that are all WL models are connectable to the HBC controller.
• Piping for systems using R410A may be different from that for systems using
conventional refrigerant because the design pressure in systems using R410A is
higher. Refer to the Data Book for more information.
• Some of the tools and equipment used for installation with systems that use other
types of refrigerant cannot be used with the systems using R410A. Refer to the
Data Book for more information.
• Do not use the existing piping, as it contains chlorine, which is found in
conventional refrigerating machine oil and refrigerant. This chlorine will
deteriorate the refrigerant machine oil in the new equipment. The existing piping
must not be used as the design pressure in systems using R410A is higher than
that in the systems using other types of refrigerant and the existing pipes may
burst.
2.2. Installation site
• Install the unit in a place not exposed to rain. The HBC controller is designed to
be installed indoors.
• Install the unit with adequate space around it for servicing.
• Do not install the unit in a place that would result in the piping length restrictions
being exceeded.
• Check for refrigerant leaks before service.
- If the refrigerant leaks, fire may result.
• Install or store the unit in a place not exposed to direct radiant heat from other
heat sources or naked flame or other ignition sources.
• Do not install the unit in any oily steamy place or near any machine that
generates high frequencies. Doing so may cause a risk of fire, erroneous
operation or condensation.
• Depending on the operation conditions, HBC controller generates noise caused
by valve actuation, refrigerant flow, and pressure changes even when operating
normally. Therefore install the unit in places such as ceilings of corridor,
restrooms and plant rooms.
• Install indoor unit and HBC controller at least 5 m [16-3/8 ft] away from each other
when installed in a space with low background noise, e.g., hotel rooms.
• Allow enough space and access to ensure water piping, refrigerant piping and
electrical wiring can be easily connected.
• Avoid places exposed to the generation, inflow, accumulation or leakage of
flammable and sulfuric gases.
• Ensure a downward gradient of at least 1/100 for drain piping.
• Properly install the unit on a stable, load-bearing surface.
1. For hanging from the ceiling
• Provide 2 inspection holes 450 mm [17-3/4 in] square in the ceiling surface as
shown in [Fig. 2.3.1].
[Fig. 2.2.1]
• Install the unit in a suitable location (such as in the ceiling of a corridor or in the
bathroom etc) away from places regularly occupied. Avoid installing in the center
of a room.
• Ensure hanging bolts are of sufficient pull out strength.
Warning:
Be sure to install the unit in a place that can sustain the entire weight.
If there is a lack of strength, it may cause the unit to fall down, resulting in an
injury.
Caution:
• Be sure to install the unit horizontally.
Install the HBC controller level (less than 1° tilt), so that the drain pan can
function correctly.
• Install the HBC controller in an environment where the temperature in
always above 0°C [32°F].
4
2.3. Securing installation and service space
1. For hanging from the ceiling
(This is a reference view showing the least installation space.)
[Fig. 2.3.1]
<A>
300
[11-13/16]
B
B
A A
450 [17-23/32] 450 [17-23/32]
C
F
Service space
D
G
Indoor unit side F
Service space
A
<B>
F
Service space
B
F
Service space
A Inspection hole
C Control box
E Water inlet
G Indoor unit side
*1 Dimensions with which pipe connection can be handled at site
Model name
CMB-WP108NU-AA
CMB-WP1016NU-AA
CMB-WP108NU-AB
CMB-WP1016NU-AB
2.4. Checking the installation site
Check that the difference of elevation between indoor and outdoor units and the
length of refrigerant piping are within the following limitations.
1. CMB-WP108NU-AA + CMB-WP108NU-AB
(CMB-WP1016NU-AA) (CMB-WP1016NU-AB)
[Fig. 2.4.1]
A
A
H
B
a
D
b
D
A Outdoor unit
C Sub-HBC controller
E Less than H=50 m [164 ft] (when the outdoor unit is higher than the HBC controller)
F Less than H1=40 m [131 ft] (when the outdoor unit is lower than the HBC controller)
G Branch joint (field supply)
H Less than 110 m [360 ft]
J Up to three units for 1 branch port
Total capacity: less than 30 (but in same mode, cooling/heating)
K Less than 15 m [49 ft]
(Unit: mm [in])
<A> Top view
<B> Front view
E
B Side of outdoor unit piping
D Side of indoor unit piping
F Service space
A B
1520 [59-7/8] 160 [6-5/16]
1800 [70-7/8] 300 [11-13/16]
1520 [59-7/8] 160 [6-5/16]
1520 [59-7/8] 160 [6-5/16]
I
C
f
G
c
g
d e
D D
J
D
B Main-HBC controller
D Indoor unit
I Less than 60 m [196 ft]
L Less than 15 m [49 ft]