Hisense AHM-080HCDSAA - Page 55

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Capacity and selection data
(1) Calculate the building demand load
Calculate the building demand load according to the local climatic conditions. The building’s location, insulation and
the other essential paremeters should be taken into account. The calculation procedure should be performed by
professionals.
(2) Select the unit according to the maximum capacity
According to the calculation results of the building demand load, select the unit with the maximum capacity at setting
condition.
(3) Check unit’s capacity with considering the correction factors
Calculate unit’s capacity with considering the correction factors according to piping length, defrosting correction factor (for
heating operation) , and heating correction factor owing to use of glycol( for Hi-Therma Monobloc series).
The calculation is required for cooling and heating operation:
Unit’s capacity = Unit’s maximum capacity at setting condition x Correction factors
Compare the unit’s capacity with the building demand load. If the unit’s capacity is insu󰀩cient, select the unit according to
the maximum capacity again.
(4) Minimum oor area (Ainst)(m
2
) for installation ≥ Minimum oor area (A
min
)(m
2
)
(5) Floor area(A
room1
)(m
2
) for installation <Minimum oor area(A
min
)(m
2
), calculate the minimum opening area for natural
ventilation Anv
min
(m
2
) between room1 and room2.
Anv
min
IU
≥1.5 m
Anv
min
IU Indoor unit
1 Room where the indoor unit is installed.
2 Room adjacent to room 1.
Anv
min
=0.0156×(m
c
-m
max
)×(A
room1
/m
max
)
1/2
m
max
=0.571×h
0
×(A
room1
)
1/2
Anv
min
is the minimum opening for natural ventilation in cm
2
;
m
c
is the actual refrigerant charge of refrigerant in the system in kg;
m
max
is the allowable maximum refrigerant charge in the system in kg.
h
0
is the installation height of the bottom side of the indoor unit + distance from the
indoor unit bottom side to the lowest part for which a refrigerant leak may release
to the indoor area.
Indoor Unit can be installed at room 1 if:
● 2 ventilation openings (permanently open) are provided between room 1 and 2, 1 at the top and 1 at the bottom.
● Bottom opening: The bottom opening must meet the minimum area requirements (Anvmin).
It must be as close as possible to the oor. If the ventilation opening starts from the oor, the height must be ≥20 mm.
The bottom of the opening must be situated ≤100 mm from the oor. At least 50% of the required opening area must be
situated <200 mm from the oor. The entire area of the opening must be situated <300 mm from the oor.
● Top opening: The area of the top opening must be larger than or equal to the bottom opening. The bottom of the top
opening must be situated at least 1.5 m above the top of the bottom opening.