Opening The Unit; About Opening The Units - Daikin VRV IV W+ Series Installer And User Reference Manual

17 | Unit installation

17.2 Opening the unit

17.2.1 About opening the units

Installer and user reference guide
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2 Calculate the volume of the room (m³) where the indoor unit is installed. In
one of the following cases, 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 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 Total volume of refrigerant in the refrigerant system.
G Size (m³) of smallest room in which there is an indoor unit installed.
H Maximum concentration level (kg/m³).
4 Calculate the refrigerant density using the total volume of the room where the
indoor unit is installed and the adjacent room. Install ventilation openings in
other doors of adjacent rooms until the resulting refrigerant density is smaller
than the maximum concentration level.
At certain times, you have to open the unit. Example:
▪ When connecting the electrical wiring
▪ When maintaining or servicing the unit
DANGER: RISK OF ELECTROCUTION
Do NOT leave the unit unattended when the service cover is removed.
a
b
F/G≤H
RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452191-1B – 2020.10