Daikin RZQ71D3V1B Installation Manual page 14

In case of complete recharge of the refrigerant, please first
execute vacuuming. Execute this vacuuming from the
service port. Do not use the port of the stop valve for
vacuuming. Vacuuming can not be executed completely
using such port.
Position of service port:
RZQ100~140B
Outdoor units have 2 ports on the piping. One
between the liquid receiver and the electronic
expansion valve and another one between the
heat exchanger and the 4-way valve.
RZQ71~140D
Outdoor units have 1 port on the piping. It is
between the heat exchanger and the 4-way valve.
Systems with sized-up liquid pipe
Replace 30 m by 15 m in calculations above and use
the table below.
G1: total length of Ø12.7 mm liquid piping.
Liquid
Model piping Ø
RZQ71 Main
12.7
RZQ100~140 Main
RZQ71 Branch 6.4
RZQ100~140 Branch 9.5
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"
"Allowable pipe length and height difference" on page
L1+L2).
Table 3: Total charging amount <unit: kg>
Liquid pipe
Model size
size-down
RZQ100~140B
standard
size-down
RZQ71D
standard
size-down
RZQ100~140D
standard
Liquid pipe
Model size
RZQ100~140B 3.80 3.80 4.30 4.80 5.30 5.80 6.30
RZQ71D size-up 2.25 2.25 2.75 3.25 3.75
RZQ100~140D 3.45 3.45 3.95 4.45 4.95 5.45 5.95
(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.
Installation manual
11
Length exceeding
"Chargeless length"
—
0.5 1.0
1.5
0.3 0.6
0.5 1.0
of the table in paragraph
6. (E.g. twin:
Refrigerant piping length
3.30 3.30 —
3.30 3.30 3.80 4.30 4.80 5.30 5.80 6.30
1.75 1.75 —
1.75 1.75 2.25 2.75 3.25 3.75
2.95 2.95 —
2.95 2.95 3.45 3.95 4.45 4.95 5.45 5.95
Refrigerant piping length
Precaution for pumping-down operation
The outdoor unit is equipped with a low pressure switch or a low
pressure sensor to protect the compressor.
Never short-circuit the low pressure switch or low pressure
sensor during pump-down operation.
Take the following steps to perform the pumping-down operation.
Preliminary measures
• Make sure to cut off power supply.
Open the front panel and cover the PCB and terminal board with
insulation sheet to avoid electric shock by accidental touching of
live parts.
• Close the front panel before leaving the outdoor unit. You cannot
leave the unit unattended in case the front panel remains opened.
• Turn on the power supply and carry out pumping-down operation
according to the following procedure.
Pump down operation
RZQ100~140B
Procedure
1 Make sure that stop valves
both on liquid and on gas side
are open.
2 Push the BS1 pumping-down
operation button on the PC
board of the outdoor unit.
—
2.0
3 Once compressor operation
stops after 3 or 5 minutes
close the stop valve on the
liquid side and gas side
securely. (See
the stop valve" on page
4 Turn off the power supply.
RZQ71~140D
Procedure
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
—
to use the stop valve" on
page
4 Once compressor operation
stops after 2 to 5 minutes
close the stop valve on the
gas side securely. (See
to use the stop valve" 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.
• After finishing the pumping-down operation, make sure to
have removed the insulation sheet that was placed in the
switch box as a protective measure like in chapter
"Preliminary measures" on page
• 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.
Precaution
—
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
(a)
, unattended with opened front
panel when power supply is
on.
"How to use
8)
Precaution
—
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
"How on.
In case the stop valve on the
8) liquid side is not securely
closed during compressor
operation, pumping-down
(a)
,
operation cannot be executed.
"How
8)
11.
RZQ71D3V1B + RZQ100~140D9V1B + RZQ100~140B9W1B
Split System air conditioners
4PW60930-1