Daikin Altherma ERHQ011-014-016BA - Electrical Wiring Precautions; Electrical Wiring Guidelines

7 Installation
Installer reference guide
40
ERHQ+ERLQ011~016 + EHBH/X11+16CB
Daikin Altherma – Low temperature split
4P384974-1 – 2015.01
▪ EN/IEC 61000‑3‑12 provided that the short-circuit power S
sc
is
greater than or equal to the minimum S
sc
value at the interface
point between the user's supply and the public system.
▪ EN/IEC 61000‑3‑12 = European/International Technical
Standard setting the limits for harmonic currents produced by
equipment connected to public low-voltage systems with input
current >16A and ≤75A per phase.
▪ It is the responsibility of the installer or user of the equipment to
ensure, by consultation with the distribution network operator if
necessary, that the equipment is connected only to a supply
with a short-circuit power S
sc
greater than or equal to the
minimum S
sc
value.
Model Z
max
Minimum S
sc
value
ERLQ011CAV3
ERLQ014CAV3
ERLQ016CAV3
0.22Ω 525kVA
ERLQ_W1
Equipment complying with EN/IEC 61000‑3‑12 (European/
International Technical Standard setting the limits for harmonic
currents produced by equipment connected to public low-voltage
systems with input current >16A and ≤75A per phase.).
Only for indoor units
See "7.9.10 To connect the backup heater power supply" on
page44.
7.9.3 Precautions when connecting the
electrical wiring
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
DANGER: RISK OF ELECTROCUTION
INFORMATION
More information about the legend and the location of the
wiring diagram of the unit can be found in "14.6 Wiring
diagram"on page97.
WARNING
ALWAYS use multicore cable for power supply cables.
7.9.4 Guidelines when connecting the electrical
wiring
Keep the following in mind:
▪ If stranded conductor wires are being used, install a round crimp-
style terminal on the tip. Place the round crimp-style terminal on
the wire up to the covered part and fasten the terminal with the
appropriate tool.
b a
a Stranded conductor wire
b Round crimp-style terminal
▪ Use the following methods for installing wires:
Wire type Installation method
Single core wire
cb
c
aa
A
AA´
A´
a Curled single core wire
b Screw
c Flat washer
Stranded conductor
wire with round
crimp-style terminal
c b ba c
a
B
B
a Terminal
b Screw
c Flat washer
NOTICE
Precautions when laying power wiring:
▪ Do not connect wiring of different thicknesses to the
power terminal block (slack in the power wiring may
cause abnormal heat).
▪ When connecting wiring which is the same thickness,
do as shown in the figure below.
▪ For wiring, use the designated power wire and connect
firmly, then secure to prevent outside pressure being
exerted on the terminal board.
▪ Use an appropriate screwdriver for tightening the
terminal screws. A screwdriver with a small head will
damage the head and make proper tightening
impossible.
▪ Over-tightening the terminal screws may break them.
Tightening torques
Item Tightening torque (N•m)
M4 (X1M) 1.2~1.8
M5 (X1M) 2.0~3.0
M5 (earth) 3.0~4.0
7.9.5 Specifications of standard wiring
components
Component V3 W1
ERHQ ERLQ ERHQ ERLQ
Power supply
cable
MCA
(a)
31.9A 34.2A 13.5A 16.3A
Voltage 230V 400V
Phase 1~ 3N~
Frequency 50Hz
Wire sizes Must comply with applicable
legislation
Interconnection cable Minimum cable section of 2.5mm²
and applicable for 230V
Recommended field fuse 32A 40A 20A