Charging Water; Piping Insulation; Field Wiring; Precautions On Electrical Wiring Work - Daikin Altherna Serie Manual De Instalación

Protecting the water circuit against freezing
Frost can damage the unit. For this reason, in colder climates the
water circuit can be protected by means of adding glycol to the water.
However, this unit is by default already foreseen with a freeze-up
protection function. Refer to paragraph "[4-04] Freeze-up protection
function" on page 22.
Depending on the expected lowest outdoor temperature, make sure
the water system is filled with a weight concentration of glycol as
mentioned in the table below.
Minimum
outdoor temperature Ethylene glycol
–5°C
–10°C
–15°C
–25°C
(a) Use of ethylene glycol is not allowed for installations with a domestic hot water
tank.
Also refer to "Checks before initial start-up" on page 19.

Charging water

1 Connect the water supply to a drain and fill valve (see "Main
components" on page 8).
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. Air present in the water
circuit might cause malfunctioning of the backup heater.
4 Check that the backup heater vessel is filled with water by
opening the pressure relief valve. Water must flow out of the
valve.
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 EN directive
98/83 EC.

Piping insulation

The complete water circuit, inclusive all piping, must be insulated to
prevent condensation during cooling operation and reduction of the
cooling and heating capacity as well as prevention of freezing of the
outside water piping during winter time. The thickness of the sealing
materials must be at least 13 mm with λ = 0,0036 in order to prevent
freezing on the outside water piping.
If the temperature is higher than 30°C and the humidity is higher than
RH 80%, then the thickness of the sealing materials should be at
least 20 mm in order to avoid condensation on the surface of the
sealing.
E(D/B)(H/L)Q011~016AA6V3+W1
Unit for air to water heat pump system
4PW51121-1A
(a)
Propylene glycol
10% 15%
25% 25%
35% 35%
45% 45%

Field wiring

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 legislation.
Switch off the power supply before making any
connections.
All field wiring and components must be installed by a
licensed electrician and must comply with relevant
European and national regulations.
The field wiring must be carried out in accordance
with the wiring diagram supplied with the unit and the
instructions given below.
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 (30 mA).
Failure to do so may cause electrical shock.

Precautions on electrical wiring work

High voltage
To avoid electrical shock, make sure to disconnect the
power supply 1 minute or more before servicing the
electrical parts. Even after 1 minute, always measure the
voltage at the terminals of main circuit capacitors or
electrical parts and, before touching, make sure that those
voltages are 50 V DC or less.
Use only copper wires.
Never squeeze bundled cables into a unit.
Fix cables so that cables do not make contact with the pipes
(especially on high pressure side).
Secure the electrical wiring with cable ties as shown in the figure
below so that it does not come in contact with the piping,
particularly on the high-pressure side.
Make sure no external pressure is applied to the terminal
connectors.
When installing the earth leakage circuit breaker make sure that
it is compatible with the inverter (resistant to high frequency
electrical noise) to avoid unnecessary opening of the earth
leakage circuit breaker.
NOTE The earth leakage circuit breaker must be a high-
speed type breaker of 30 mA (<0.1 s).
Installation manual
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