Securing Safety Against Refrigerant Leaks - Daikin VRV IV+ Installer And User Reference Manual

5 | Preparation

5.2.3 Securing safety against refrigerant leaks

About safety against refrigerant leaks
About the maximum concentration level
Installer and user reference guide
28
NOTICE
When installing the snow cover, do NOT obstruct the air flow of the unit.
NOTICE
When operating the unit in a low outdoor ambient temperature with high humidity
conditions, make sure to take precautions to keep the drain holes of the unit free by
using proper equipment.
In heating:
20
15.5
15
10
5
a
0
–5
–10
–15
–20
10
T
a Warming up operation range
b Operation range
T Ambient indoor temperature
AI
T Ambient outdoor temperature
AO
If the unit has to operate for 5 days in this area with high humidity (>90%),
Daikin recommends to install the optional heater tape kit (EKBPH012TA or
EKBPH020TA) to keep the drain holes free.
The installer and system specialist shall secure safety against leakage according to
local regulations or standards. The following standards may be applicable if local
regulations are not available.
This system uses R410A as refrigerant. R410A itself is an entirely safe non-toxic,
non-combustible refrigerant. Nevertheless care must be taken to ensure that the
system is installed in a room which is sufficiently large. This assures that the
maximum concentration level of refrigerant gas is not exceeded, in the unlikely
event of major leak in the system and this in accordance to the local applicable
regulations and standards.
The maximum charge of refrigerant and the calculation of the maximum
concentration of refrigerant is directly related to the humanly occupied space in to
which it could leak.
The unit of measurement of the concentration is kg/m
3
refrigerant gas in 1 m volume of the occupied space).
b
25 27 30
15 20
(°C DB)
AI
3
(the weight in kg of the
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1A – 2019.10