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5 Preparation
Installer and user reference guide
11
RXYSQ4~Y1B
VRV IV-S system air conditioner
4P404676-1A – 2016.03
a
a
b
a
Prevailing wind direction
b
Air outlet
5.2.2
Additional installation site requirements
of the outdoor unit in cold climates
Protect the outdoor unit against direct snowfall and take care that the
outdoor unit is NEVER snowed up.
a
b
c
c
d
a
Snow cover or shed
b
Pedestal (minimum height = 150 mm)
c
Prevailing wind direction
d
Air outlet
NOTICE
When operating the unit in heating 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:
T
AO
(°C WB)
a
b
20
15.5
15
10
5
0
–5
–10
–15
–20
10
15
20
25 27 30
T
AI
(°C DB)
a
Warming up operation range
b
Operation range
T
AI
Ambient indoor temperature
T
AO
Ambient outdoor temperature
If the unit is selected to operate at ambient temperatures
lower than –5°C for 5 days or longer, with relative humidity
levels exceeding 95%, we recommend to apply a Daikin
range specifically designed for such application and/or to
contact your dealer for further advice.
5.2.3
Securing safety against refrigerant leaks
About safety against refrigerant leaks
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 air conditioning facilities are 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.
About the maximum concentration level
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
(the weight in
kg of the refrigerant gas in 1 m
3
volume of the occupied space).
Compliance to the local applicable regulations and standards for the
maximum allowable concentration level is required.
According to the appropriate European Standard, the maximum
allowed concentration level of refrigerant to a humanly space for
R410A is limited to 0.44 kg/m
3
.