6 Preparation
Installer reference guide
15
RVLQ05+08CAV4 + RHYHBH05AA + RHYHBH/X08AA +
RHYKOMB33AA
ROTEX HPU hybrid
4P355635-1 – 2013.05
6.1.2 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
c
Prevailing wind direction
d
Air outlet
▪ The unit should be installed in a way that a minimum of 15 cm free
space is assured below the bottom plate of the unit at all weather
conditions (e.g., heavy snowfall). It is recommended to install the
unit at a minimum height of 30 cm. See "7.2 Mounting the outdoor
unit" on page 21 for more details.
▪ In heavy snowfall areas it is very important to select an installation
site where the snow will NOT affect the unit. If lateral snowfall is
possible, make sure that the heat exchanger coil is NOT affected
by the snow. If necessary, install a snow cover or shed and a
pedestal.
6.1.3 Installation site requirements of the
indoor unit
▪ Mind the measurement guidelines:
Maximum refrigerant piping length between indoor
unit and outdoor unit
20 m
(a)
Minimum refrigerant piping length between indoor
unit and outdoor unit
3 m
Maximum height difference between indoor unit and
outdoor unit
20 m
Maximum equivalent piping length between the
3-way valve and the indoor unit (for installations
with domestic hot water tank)
3 m
(b)
Maximum equivalent piping length between the
domestic hot water tank and the indoor unit (for
installations with domestic hot water tank)
10 m
(b)
(a) Check the outdoor unit installation manual.
(b) Piping diameter 0.75".
▪ Mind the following spacing installation guidelines:
>500
200
200
10 350 500
(mm)
Do NOT install the unit in places such as:
▪ Where there is mist of mineral oil, oil spray or vapour.
Plastic parts may deteriorate, and cause them to fall out or water
to leak.
▪ Sound sensitive areas (e.g. near a bedroom and the like), so that
the operation noise will cause no trouble.
▪ The foundation must be strong enough to bear the weight of the
unit. Take the weight of the unit with a domestic hot water tank full
of water into account.
Make sure, in the event of a water leak, water cannot cause any
damage to the installation space and surroundings.
▪ In places with high humidity (max. RH=85%), for example a
bathroom.
▪ In places where frost is possible. Ambient temperature around the
indoor unit should be >5°C.
▪ The indoor unit is designed for indoor installation only and for
ambient temperatures ranging 5~35°C in cooling mode and
5~30°C in heating mode.
6.2 Preparing refrigerant piping
6.2.1 Refrigerant piping insulation
▪ Use polyethylene foam as insulation material:
▪ with a heat transfer rate between 0.041 and 0.052 W/mK (0.035
and 0.045 kcal/mh°C)
▪ with a heat resistance of at least 110°C
▪ Insulation thickness
Pipe outer diameter
(Ø
p
)
Insulation inner
diameter (Ø
i
)
Insulation thickness
(t)
6.4 mm (1/4") 8~10 mm 10 mm
15.9 mm (5/8") 16~20 mm 13 mm
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