Daikin ERGA04DAV3A Installer's Reference Manual page 24

6 Preparation
If the total refrigerant charge in the system is <1.84 kg (i.e. if the piping length is <27 m), there are no additional minimum floor area
requirements.
If the total refrigerant charge in the system is ≥1.84 kg (i.e. if the piping length is ≥27 m), you need to comply with additional minimum
floor area requirements as described in the following flow chart. The flow chart uses the following tables:
charge allowed in a room: indoor unit" on page
Minimum venting opening area for natural ventilation: indoor unit" on
INFORMATION
Multiple indoor units. If two or more indoor units are
installed in a room, you must consider the maximum
refrigerant charge that can be released in the room when a
SINGLE leak occurs. Example: If two indoor units are
installed in the room, each with its own outdoor unit, then
you have to consider the refrigerant charge of the largest
indoor-outdoor combination.
Start
Input from installer:
▪ Total refrigerant charge (m ) (kg)
c
▪ Area of room A (A ) (m )
2
room A
Use table 1 in chapter "Technical data" to
calculate the maximum refrigerant charge
(m ) (kg) allowed for room A.
max
m ≥m ?
max c
Yes
The unit can be installed in room A, and
without further room size or ventilation
requirements.
Unit can be installed at room A if:
▪ 2 ventilation openings (permanently open) are provided between room A and B, 1 at the top and 1 at the bottom.
▪ Bottom opening: The bottom opening must meet the minimum area requirements (VA
starts from the floor, the height must be ≥20 mm. The bottom of the opening must be situated ≤100 mm from the floor. At least 50% of the required opening
area must be situated <200 mm from the floor. The entire area of the opening must be situated <300 mm from the floor.
▪ 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.
▪ Ventilation openings to the outside are NOT considered suitable ventilation openings (the user can block them when it is cold).
Installer reference guide
24
95, "14.6 Table 2 – Minimum floor area: indoor unit" on page 95
Input from installer:
▪ Area of adjacent room B (A
Use table 2 in chapter "Technical data" to
calculate the total minimum floor area
(A ) (m ) required for the total refrigerant
2
min total
charge (m ).
c
A
min total
No
Determine the refrigerant amount that exceeds
m (dm) (kg). (dm=m
max
Use table 3 in chapter "Technical data" and
dm to calculate the minimum opening area for
natural ventilation between room A and
room B (VA ) (cm
min
Final English - Tanslations in progress
page 95.
a
a Indoor unit
) (m )
2
room B A Room where the indoor unit is installed.
B Room adjacent to room A.
No
≤A +A ?
room A room B
Yes
–m )
c max
).
2
). It must be as close as possible to the floor. If the ventilation opening
min
"14.5 Table 1 – Maximum refrigerant
and "14.7 Table 3 –
A B
Contact your dealer.
ERGA04~08DAV3(A) + EHVH/X04+08S18+23DA
Daikin Altherma – Low temperature split
4P495248-1 – 2017.12