Daikin EKHBRD011ABV1, Installation Manual

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EKHBRD011~Y1
Indoor unit for air to water heat pump system
4PW60970-1B
Installation manual
14
Precautions when connecting field piping and regarding
insulation
The complete water circuit, inclusive all piping, must be insulated to
prevent reduction of the heating capacity.
If the indoor ambient temperature is higher than 30°C and the
humidity is higher than RH 80% then the thickness of the insulation
materials should be at least 20 mm in order to avoid condensation on
the surface of the insulation.
C
HARGING WATER
Method for adding water
1 Connect the water supply to a fill valve (field supply).
2 Make sure the automatic air purge valve is open (at least 2
turns).
3 Fill with water until the manometer indicates a pressure of
approximately 2.0 bar. Remove air in the circuit as much as
possible using the air purge valves (refer to
"[E-04] Pump only
operation" on page 25 ). Air present in the water circuit might
cause malfunctioning of the heater kit (if installed).
4 For units with optional heater kit: remove air in the heater vessel
using the heater kit air purge valve.
E
LECTRICAL WIRING WORK
Precautions on electrical wiring work
NOTE
■
During filling, it might not be possible to remove all
air in the system. Remaining air will be removed
through the automatic air purge valves during first
operating hours of the system. Additional filling
with water afterwards might be required.
■
The water pressure indicated on the manometer
will vary depending on the water temperature
(higher pressure at higher water temperature).
However, at all times water pressure should
remain above 0.3 bar to avoid air entering the
circuit.
■
The unit might dispose some excessive water
through the pressure relief valve.
■
Water quality must be according to EU directive
98/83 EC.
WARNING
■
A main switch or other means for disconnection,
having a contact separation in all poles, must be
incorporated in the fixed wiring in accordance with
relevant local and national regulations.
■
Switch off the power supply before making any
connections.
■
Use only copper wires.
■
All field wiring and components must be installed by a
licensed electrician and must comply with relevant
European and national regulations.
■
Be sure to install the required fuses as mentioned on
the electrical wiring diagram.
■
The field wiring must be carried out in accordance
with the wiring diagram supplied with the unit and the
instructions given below.
■
Never squeeze bundled cables and make sure that it
does not come in contact with the piping and sharp
edges.
Make sure no external pressure is applied to the
terminal connections.
■
Be sure to use a dedicated power supply. Never use a
power supply shared by another appliance.
■
Be sure to establish an earth. Do not earth the unit to
a utility pipe, surge absorber, or telephone earth.
Incomplete earth may cause electrical shock.
■
Be sure to install an earth leakage protector in
accordance with relevant local and national
regulations. Failure to do so may cause electrical
shock.
When installing the earth leakage protector make
sure that it is compatible with the inverter (resistant to
high frequency electrical noise) to avoid unnecessary
opening of the earth leakage protector.
■
As this unit is equipped with an inverter, installing a
phase advancing capacitor not only will deteriorate
power factor improvement effect, but also may cause
capacitor abnormal heating accident due to high-
frequency waves. Therefore, never install a phase
advancing capacitor.
■
Be sure that after installation work all the rubber
bushings are put back in place to protect the wires
from touching sharp edges.
For V1 models only
■
Equipment complying with EN/IEC 61000-3-12
(a)
■
This equipment complies with EN/IEC 61000-3-11
(b)
provided that the system impedance Z
sys
is less than
or equal to Z
max
at the interface point between the
user's supply and the public system. 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 system impedance
Z
sys
less than or equal to Z
max
.
(a) 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.
(b) European/International Technical Standard setting the limits for voltage changes,
voltage fluctuations and flicker in public low-voltage supply systems for equipment
with rated current
≤
75 A.
011 014 016
Z
max
=
0.34
Ω
0.32
Ω
0.32
Ω
4PW60970-1B_digital_EN.book Page 14 Thursday, September 2, 2010 1:15 PM