Complete Recharging; Total Charging Weight Of The Refrigerant (After A Leak, Etc.); Pump Down Operation - Daikin RZQG71L8V1B Installation Manual

12.4. 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 10
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.
WARNING
Some sections of the refrigerant circuit may be isolated
from other sections caused by components with specific
functions (e.g. valves). The refrigerant circuit therefore
features additional service ports for vacuuming, pressure
relief or pressurizing the circuit.
In case it is required to perform brazing on the unit, ensure
that there is no pressure remaining inside the unit. Internal
pressures need to be released with ALL the service ports
indicated on the figures below opened. The location is
depending on mode type.
RZQG71/RZQSG100~125
12.5. Total charging weight of the refrigerant
(after a leak, etc.)
The total charging amounts relate to the refrigerant piping length as
in "Maximum total one-way piping length" of the table in paragraph
"8.4. Allowable pipe length and height difference" on page 8
L1+L2).
Table 3: Total charging amount <unit: kg>
Liquid
Model piping
size-down
RZQG71
standard
size-down
RZQG100~140
standard
RZQSG100+125 size-down
standard
RZQSG140 size-down
standard
(a) For RZQG units only: 3~10 m.
(b) For RZQG units only: When piping length is less than 5 m, a complete recharging
of the unit is required. Charge the unit with the refrigerant charge as indicated.
Installation manual
15
"9.3. Stop valve
), since vacuum drying can not be
RZQG100~140/RZQSG140
. (E.g. twin:
Refrigerant piping length
1.9 — — — —
1.9 2.4 2.9 3.4 3.9
3.0 — — — —
3.0 3.5 4.0 4.5 5.0
1.9 — — — —
1.9 2.4 2.9 3.4 3.9
3.0 — — — —
3.0 3.5 4.0 4.5 5.0
Model
RZQG71
RZQG100~140
RZQSG100+125
RZQSG140
(a) When piping length is less than 5 m, a complete recharging of the unit is required.
Charge the unit with the refrigerant charge as indicated.

13. Pump 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.
1 Make sure that stop valves both
on liquid and on gas side are
open.
2 Push the BS4 pumping-down
operation button on the PC board
of the outdoor unit (±8 seconds).
3 Close the stop valve on the liquid
side securely about 2 minutes
after the compressor started
operation. (See
operation" on page
4 Once compressor operation stops
after 2 to 5 minutes
stop valve on the gas side
securely. (See
operation" on page
5 Turn off the power supply.
(a) If after finishing pumping-down operation the outdoor unit does not operate, not
even when the remote controller switch is turned on, the remote controller may or
may not indicate "U4". But this is not a malfunction.
When in need of operation, turn off the main power supply and
turn it on again. Make sure that stop valves both on liquid and
gas side are open and be sure to operate the unit in cooling
operation during test run.
WARNING
Make sure to re-open both stop valves before restarting
operation of the unit.
— —
— —
— —
5.5 6.0
— —
— —
— —
— —
Refrigerant piping length
Liquid
piping
size-up 1.9 2.4 2.9
size-up 3.0 3.5 4.0
size-up — 2.4 2.9
size-up — 3.5 4.0
Procedure
—
Compressor and outdoor fan will
start operation automatically.
The indoor unit fan may
automatically start running.
Please pay attention to this.
Never leave the outdoor unit
unattended with opened front
panel when power supply is on.
"9.3. Stop valve In case the stop valve on the
10.) liquid side is not securely closed
during compressor operation,
pumping-down operation cannot
(a)
, close the
be executed.
"9.3. Stop valve
10.)
RZQG71~140L + RZQSG100~140L
Split system air conditioners
3.4 3.9 — —
4.5 5.0 5.5 6.0
3.4 3.9 — —
4.5 5.0 — —
Precaution
4P339538-1A – 2014.03