Calculating The Additional Refrigerant Charge For Erhq Models; Calculating The Additional Refrigerant Charge For Erlq Models; Complete Recharging; For Erhq Only - Daikin altherma ERHQ011BAV3 Installation Manual

12.3. Calculating the additional refrigerant charge for
ERHQ models
NOTICE
Piping length is the one way length of liquid piping.
NOTICE
Minimum piping length = 3 m.
It is not necessary to charge additionally if the piping length is under
10 m.
If the piping length is over 10 m please determine the additional
amount of refrigerant to be charged using the formula below.
R=(total length (m) of liquid piping – 10 m) x 0.054
R=additional charge (kg)(rounded in units of 0.1 kg)
12.4. Calculating the additional refrigerant charge for
ERLQ models
NOTICE
Piping length is the one way length of liquid piping.
It is not necessary to charge additionally if the piping length is under
10 m.
If the piping length is over 10 m please determine the additional
amount of refrigerant to be charged using the formula below.
R=(total length (m) of liquid piping – 10 m) x 0.054
R=additional charge (kg)(rounded in units of 0.1 kg)

12.5. Complete recharging

NOTICE
Before recharging, make sure to execute vacuum drying of
the internal piping of the unit as well. To do so, use the
internal service port of the unit. Do NOT use the service
ports located on the stop valve (see
operation" on page
performed properly from these ports.
Outdoor units have 1 port on the piping. It is between the
heat exchanger and the 4-way valve.
In case complete recharging is required (after a leak, etc.), refer to
the information below to determine the necessary amount of
refrigerant.

For ERHQ only

NOTICE
Minimum piping length = 3 m.
For V3 models
Total charging amount <unit: kg>
Charge of refrigerant (kg) depends on total liquid piping length.
Total refrigerant charge = 2.7 kg + (total length (m) of liquid piping
– 10 m) x 0.054
Remark: Factory refrigerant charge is 2.7 kg
Installation manual
17
"9.3. Stop valve
13), since vacuum drying can not be
For W1 models
Total charging amount <unit: kg>
Charge of refrigerant (kg) depends on total liquid piping length.
Total refrigerant charge = 2.95 kg + (total length (m) of liquid piping
– 10 m) x 0.054
Remark: Factory refrigerant charge is 2.95 kg

For ERLQ only

Total charging amount <unit: kg>
Charge of refrigerant (kg) depends on total liquid piping length.
Total refrigerant charge = 3.4 kg + (total length (m) of liquid piping
– 10 m) x 0.054
Remark: Factory refrigerant charge is 3.4 kg
13. P
UMP DOWN OPERATION
This unit is equipped with an automatic pump down operation which
will collect all refrigerant from the field piping and indoor unit in the
outdoor unit. To protect the environment, make sure to perform the
following pump down operation when relocating or disposing of the
unit.
INFORMATION
For more details, refer to the applicable service manual.
WARNING
The outdoor unit is equipped with a low pressure switch or
a low pressure sensor to protect the compressor by
switching it off. Never short-circuit the low pressure switch
during pump down operation!
NOTICE
Before pumpdown is activated be sure that the water
temperature and water volume is sufficiently high.
Pumpdown is done in "cooling mode". See installation
manual of the indoor unit for more details.
1 Turn on the main power supply switch.
2 Make sure the liquid stop valve and the gas stop valve are open
(see "9.3. Stop valve operation" on page
3 Press the pump down button (BS4) on the PCB of the outdoor
unit for at least 8 seconds.
4 The compressor and outdoor unit fan will start operating
automatically.
5 Once operation stops (after 3 to 5 minutes), close the liquid stop
valve and the gas stop valve.
6 The pump down operation is now finished. The remote controller
may display "U4" and the indoor pump may continue operating.
This is not a malfunction. Even when the ON button on the
remote controller is pressed, the unit will not start to operate. To
restart operation of the unit turn off the main power supply
switch and turn it on again.
7 Turn off the main power supply switch.
WARNING
Make sure to re-open both stop valves before restarting
operation of the unit.
ERHQ011~016BAV3+W1 + ERLQ011~016CAV3+W1
13).
Outdoor unit for air to water heat pump
4PW57794-1C – 2013.04