10
en
2. Selecting an installation site
2.1. About the product
•
This unit uses R32-type refrigerant.
•
Indoor units that are all WP, all W, or all WL models are connectable to the HBC.
•
Piping for systems using R32 may be different from that for systems using
conventional refrigerant because the design pressure in systems using R32 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 R32. 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 R32 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 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 unit generates noise caused by
valve actuation, refrigerant flow, and pressure changes even when operating
normally. Therefore install the unit in places such as machinery rooms.
•
Install indoor unit and HBC at least 5 m 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 [Fig. 2.2.1] (P.2)
•
Provide 2 inspection holes 450 mm square in the ceiling surface as shown in
[Fig. 2.3.2] (P.2).
•
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 level (less than 1° tilt to downward), so that the drain pan
can function correctly.
•
Install the HBC in an environment where the temperature in always above
0°C.
2.3. Securing installation and service space
1. Installation
(This is a reference view showing the least installation space.)
[Fig. 2.3.1] (P.2)
[Fig. 2.3.2] (P.2)
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-WM350F-AA + CMB-WM108V-BB
(CMB-WM500F-AA) (CMB-WM1016V-BB)
[Fig. 2.4.1] (P.2)
Notes:
*1 Indoor units that are connected to the same branch joint cannot be
simultaneously operated in different operation modes.
Warning:
(When R32 refrigerant is used)
•
Do not use means to accelerate the defrosting process or to clean, other
than those recommended by the manufacturer.
•
The unit shall be stored in a room without continuously operating ignition
sources (for example: open flames, an operating gas appliance or
an operating electric heater.)
•
Do not pierce or burn.
•
Be aware that refrigerants may not contain an odour.
•
The unit shall be installed, operated and stored in a room with a floor area
according to the following figure.
•
When installing an HBC, take safety measures in accordance with the
European Standard, based on the system refrigerant amount and the room
volume as shown in the figure below. (The installation restrictions can be
simply found by using the flowchart provided on the “Safety handling for
R32” document.)
Notes:
•
Refer to the outdoor unit manual about additional refrigerant amount of
HBC and maximum amount of system refrigerant.
•
Be sure to protect pipings from physical damage.
<A> Front view
<B> Right side view
A
Side of outdoor unit piping
B
Side of Sub-HBC piping
C
Side of indoor unit piping
D
Service space
*1 Dimensions with which pipe connection can be handled at site
<A> Top view
<B> Front view
A
Inspection hole
B
Side of Main-HBC piping
C
Control box
D
Side of indoor unit piping
E
Service space
*1 Dimensions with which pipe connection can be handled at site
A
Outdoor unit
B
Main-HBC
C
Sub-HBC
D
Indoor unit
E
Less than H=50 m (when the outdoor unit is higher than HBC)
F
Less than H1=40 m (when the outdoor unit is lower than HBC)
G
Branch joint (field supply)
H
Junction pipe (field supply)
I
Less than 110 m
J
Less than 60 m
K
Connecting indoor unit less than 80
L
Connecting indoor unit more than 100
M
Up to three units for 1 branch port
Total capacity: less than 80 (but in same mode, cooling/heating)
N
Less than 15 m
O
Less than 15 m
(Unit: m)
Item
Piping portion
Allowable value
Pipe
Leng
ths Between outdoor unit and HBC
(refrigerant piping work)
A
110 or less
Water piping work between indoor units
and HBC
f + g + j + k
60 or less
Dif
fere
nce
of e
lev
atio
n
Between
indoor and
outdoor units
Above outdoor unit
H
50 or less
Below outdoor unit
H1
40 or less
Between indoor units and HBC
h1
15 or less
Between indoor units
h2
15 or less
0
10
20
30
40
50
60
70
80
0
50
100
150
200
250
300
350
400
450
500
550
600
650
Sy
Stem
r
efr
ig
er
an
t a
m
ou
nt
[kg
]
Room volume [m
3
]
At least two safety
measures are
required.
NG (ISO 5149)
At least one safety
measure is required.
Construction guidance
01_WT09805X01_en.book 10 ページ ２０２１年１１月１日 月曜日 午前８時４７分
