Daikin RZQ71D7V1B, Installation Manual

Page: 14 / 20

Installation manual
11
RZQ71~14 RZQ7 RZQ100~140B8W1B
Split System air conditioners
4PW48323-1B
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
"Allowable pipe length and height difference" on page 6 . (E.g. twin:
L1+L2).
Table 3: Total charging amount <unit: kg>
Precaution for pumping-down operation
The outdoor unit is equipped with a low pressure switch or a low
pressure sensor to protect the compressor.
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
■
RZQ71~140D
(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 11 .
• 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.
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.
Length exceeding
"Chargeless length"
Model
Liquid
piping
Ø
0~5 m
5~10 m
10~15 m 15~20 m
RZQ71 Main
12.7 0.5 1.0
— —
RZQ100~140 Main 1.5 2.0
RZQ71 Branch 6.4 0.3 0.6
RZQ100~140 Branch 9.5 0.5 1.0
Refrigerant piping length
Model
Liquid pipe
size
3~5
(a)
m
5~10 m
10~20 m 20~30 m 30~40 m 40~50 m 50~60 m 60~75 m
RZQ100~140B
size-down 3.30 3.30 —
standard 3.30 3.30 3.80 4.30 4.80 5.30 5.80 6.30
RZQ71D
size-down 1.75 1.75 —
standard 1.75 1.75 2.25 2.75 3.25 3.75 —
RZQ100~140D
size-down 2.95 2.95 —
standard 2.95 2.95 3.45 3.95 4.45 4.95 5.45 5.95
Refrigerant piping length
Model
Liquid pipe
size
3~5
(a)
m
(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.
5~10 m
10~15 m 15~20 m 20~25 m 25~30 m 30~35 m
RZQ100~140B
size-up
3.80 3.80 4.30 4.80 5.30 5.80 6.30
RZQ71D 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
Never short-circuit the low pressure switch or low pressure
sensor during pump-down operation.
Procedure Precaution
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. Compressor and outdoor fan
will start operation
automatically.
The indoor unit fan may
automatically start running.
Please pay attention to this.
3 Once compressor operation
stops after 3 or 5 minutes
(a)
,
close the stop valve on the
liquid side and gas side
securely. (See
"How to use
the stop valve" on page 8 )
Never leave the outdoor unit
unattended with opened front
panel when power supply is
on.
4 Turn off the power supply.
Procedure Precaution
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). Compressor and outdoor fan
will start operation
automatically.
The indoor unit fan may
automatically start running.
Please pay attention to this.
3 Close the stop valve on the
liquid side securely about 2
minutes after the compressor
started operation. (See
"How
to use the stop valve" on
page 8
)
Never leave the outdoor unit
unattended with opened front
panel when power supply is
on.
In case the stop valve on the
liquid side is not securely
closed during compressor
operation, pumping-down
operation cannot be executed.
4 Once compressor operation
stops after 2 to 5 minutes
(a)
,
close the stop valve on the
gas side securely. (See
"How
to use the stop valve" on
page 8
)
5 Turn off the power supply.