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Unit installation
Installer and user reference guide
65
R R8T7V1B
VRV IV heat pump for indoor installation
4P499898-1A – 2020.10
To check the maximum concentration level
Check the maximum concentration level in accordance with steps 1 to 4 below and
take whatever action is necessary to comply.
1
Calculate the amount of refrigerant (kg) charged to each system separately.
Formula
A+B=C
A
Amount of refrigerant in a single unit system (amount
of refrigerant with which the system is charged before
leaving the factory)
B
Additional charging amount (amount of refrigerant
added locally)
C
Total amount of refrigerant (kg) in the system
NOTICE
Where a single refrigerant facility is divided into 2 entirely independent refrigerant
systems, use the amount of refrigerant with which each separate system is charged.
2
Calculate the volume of the room (m
3
) where the unit is installed. In a case
such as the following, calculate the volume of (D), (E) as a single room or as
the smallest room.
D
When there are no smaller room divisions:
E
When there is a room division that has an opening sufficiently large
to permit free air flow.
a
b
a
b
a
Opening between the rooms. In case there is a door the openings
above and below the door each must be equivalent in size to 0.15%
or more of the floor area.
b
Room division
3
Calculate the refrigerant density using the results of the calculations in steps 1
and 2 above. If the result of the above calculation exceeds the maximum
concentration level, a ventilation opening to the adjacent room shall be made.
Formula
F/G≤H
F
Total volume of refrigerant in the refrigerant system
G
Size (m
3
) of smallest room in which there is a unit
installed
H
Maximum concentration level (kg/m
3
)
4
Calculate the refrigerant density taking the volume of the room where the
unit is installed and the adjacent room. Install ventilation openings in the door
of adjacent rooms until the refrigerant density is smaller than the maximum
concentration level.
Содержание VRV IV RKXYQ5T8Y1B Series
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