Additional Refrigerant Charging; Precautions When Adding R410A; Charging Amount; Pump Down Operation - Daikin Altherma ERLQ018BAVJU Manuel D'installation

11.1. Additional refrigerant charging

This outdoor unit is factory charged with refrigerant and
depending on pipe sizes and pipe lengths some systems require
additional charging of refrigerant. See "11.3. Charging amount"
on page 11.
In case re-charge is required, refer to the nameplate of the unit.
It states the type of refrigerant and necessary amount.

11.2. Precautions when adding R410A

The refrigerant requires strict cautions for keeping the system
clean, dry and tight.
- Clean and dry
Foreign materials (including mineral oils or moisture) should
be prevented from getting mixed into the system.
- Tight
Read "9. Precautions on refrigerant piping" on page 7
carefully and follow these procedures correctly.
Make sure to charge the refrigerant in liquid state to the liquid
pipe. Since R410A is a mixed refrigerant, its composition
changes if charged in its gaseous state and normal system
operation would then no longer be assured.
Before charging, check whether the refrigerant cylinder has a
syphon attached or not and position the cylinder accordingly.
Filling using a cylinder
with a siphon attached
Charge the liquid refrigerant
with the cylinder in upright
position.

11.3. Charging amount

If the total length of the piping exceeds 32.8 ft (10 m), additionally
charge with 0.013 lbs/ft (20 g/m) for each additional foot (meter) of
piping.
12. P
UMP DOWN OPERATION
In order to protect the environment, be sure to pump down when
relocating or disposing of the unit. The pump down operation will
extract all regrigerant from the piping into the outdoor unit.
WARNING
During pump down operation, stop the compressor before
removing the refrigerant piping.
If the compressor is still running and the stop valve is open
during pump-down, air will be sucked in when the
refrigerant piping is removed, causing abnormal pressure
in the freezer cycle which will lead to breakage and even to
injury.
DANGER: ELECTRICAL SHOCK
See "4. General safety precautions" on page 3.

12.1. Procedure

1 Turn on the main power supply.
2 Make sure the liquid stop valve and the gas stop valve are open
(see "How to use the stop valve" on page 8).
3 Press the forced operation switch SW1 to begin forced cooling.
4 After 5-10 minutes (after only 1 or 2 minutes in case of very low
ambient temperatures (<14°F (–10°C)), close the liquid stop
valve.
5 After 2-3 minutes, close the gas stop valve and press the forced
operation switch SW1 again to stop forced cooling.
Installation manual
11
13. E
Filling using a cylinder
without a siphon attached
Charge the liquid refrigerant
with the cylinder in up-side-
down position.
S102
S2
LED-A
SW4
1
SW1
1 Forced operation switch SW1
NOTE Take care that while running forced cooling operation
the water temperature remains higher than 41°F (5°C)
(see temperature read out of the indoor unit). You can
achieve this, for example, by activating all fans of the
fan coil units.
LECTRIC WIRING WORK
ATTENTION
All field wiring and components must be installed by
an installer and must comply with the applicable
legislation.
The equipment described in this manual may cause
electronic noise generated from radio-frequency
energy. The equipment complies to specifications that
are designed to provide reasonable protection against
such interference. However, there is no guarantee that
interference will not occur in a particular installation.
It is therefore recommended to install the equipment and
electric wires keeping proper distances away from stereo
equipment, personal computers, etc....
In extreme circumstances you shall keep distances of
9.84 ft (3 m) or more.
NOTE To persons in charge of electrical wiring work:
Do not operate the unit until the refrigerant piping is
complete. Running the unit before the piping is ready
will break the compressor.
DANGER: ELECTRICAL SHOCK
See "4. General safety precautions" on page 3.
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 the applicable
legislation.
Use only copper wires.
All 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 be sure that it does
not come in contact with the non-insulated piping and
sharp edges. Be sure no external pressure is applied to
the terminal connections.
Be sure to establish a ground. Do not ground the unit to a
utility pipe, surge absorber, or telephone ground.
Incomplete ground may cause electrical shock.
ERLQ018~030BAVJU
Outdoor unit for air to water heat pump
4PW62590-1 – 07.2010