6 Preparation
Installer reference guide
23
ERHQ+ERLQ011~016 + EHVH/X11+16S18+26CB
Daikin Altherma – Low temperature split
4P384975-1C – 2018.02
b
Prevailing wind direction
c
Air outlet
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.
INFORMATION
You can use the optional snow cover (EK016SNC).
a
b
c
c
d
a
Snow cover or shed
b
Pedestal (minimum height=150 mm)
c
Prevailing wind direction
d
Air outlet
6.2.3
Installation site requirements of the
indoor unit
INFORMATION
Also read the precautions and requirements in the
"General safety precautions" chapter.
▪ The indoor unit is designed for indoor installation only and for
ambient temperatures ranging from 5~35°C.
▪ Mind the measurement guidelines:
Maximum refrigerant piping length between indoor
unit and outdoor unit
ERHQ: 75 m
(95 m)
(a)
ERLQ: 50 m
(70 m)
(a)
Minimum refrigerant piping length between indoor
unit and outdoor unit
3 m
Maximum height difference between indoor unit and
outdoor unit
30 m
(a)
Parenthesised figure represents the equivalent length.
▪ Mind the following spacing installation guidelines:
>500
>10
>10
(mm)
▪ 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.
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), so that the
operation noise will cause no trouble.
▪ In places with high humidity (max. RH=85%), for example a
bathroom.
▪ In places where frost is possible. Ambient temperature around the
indoor unit must be >5°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
Ø9.5 mm (3/8")
Gas piping
Ø15.9 mm (5/8")
▪
Piping temper grade and thickness:
Outer diameter
(Ø)
Temper grade
Thickness (t)
(a)
9.5 mm (3/8")
Annealed (O)
≥0.8 mm
t
Ø
15.9 mm (5/8")
Annealed (O)
≥1.0 mm
(a)
Depending on the applicable legislation and the unit's
maximum working pressure (see "PS High" on the unit
name plate), larger piping thickness might be required.
6.3.2
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 120°C
▪ Insulation thickness
