6 Preparation
Installer reference guide
23
RRLQ004~008CA + RHBH/X04+08CB
ROTEX HPSU low temperature Bi‑bloc
4P384979-1 – 2015.01
b
Prevailing wind direction
c
Air outlet
Do NOT install the unit in the following places:
▪ Sound sensitive areas (e.g. near a bedroom and the like), so that
the operation noise will cause no trouble.
▪ In places where a mineral oil mist, spray or vapour may be
present in the atmosphere. Plastic parts may deteriorate and fall
off or cause water leakage.
It is NOT recommended to install the unit in the following places
because it may shorten the life of the unit:
▪ in coastal areas or other places where the air contains high levels
of salt. Corrosion may occur,
▪ where the voltage fluctuates a lot,
▪ in vehicles or vessels,
▪ where acidic or alkaline vapour is present.
The outdoor unit is designed for outdoor installation only, and for
ambient temperatures ranging 10~43°C in cooling mode and –
25~25°C in heating mode.
6.2.2
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
c
Prevailing wind direction
d
Air outlet
▪ In any case, provide at least 300 mm of free space below the unit.
Additionally, make sure the unit is positioned at least 100 mm
above the maximum expected level of snow. See
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.
6.2.3
Installation site requirements of the
indoor unit
INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
▪ Mind the measurement guidelines:
Maximum refrigerant piping length between indoor
unit and outdoor unit
30 m
Minimum refrigerant piping length between indoor
unit and outdoor unit
3 m
Maximum height difference between indoor unit and
outdoor unit
20 m
Maximum distance between the 3‑way valve and
the indoor unit (for installations with domestic hot
water tank)
3 m
Maximum distance between the domestic hot water
tank and the indoor unit (for installations with
domestic hot water tank)
10 m
▪ Mind the following spacing installation guidelines:
≥1
150
200
200
10
10
500
(mm)
Do NOT install the unit in places such as:
▪ In places where a mineral oil mist, spray or vapour may be
present in the atmosphere. Plastic parts may deteriorate and fall
off or cause water leakage.
▪ 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 from 5~35°C.
6.3
Preparing refrigerant piping
6.3.1
Refrigerant piping requirements
INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
▪
Piping material:
Phosphoric acid deoxidised seamless copper.
▪
Piping diameter:
Liquid piping
Ø6.4 mm (1/4")
Gas piping
Ø15.9 mm (5/8")
▪
Piping temper grade and thickness:
