10
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By performing the following modi
Þ
cation, operation noise of the outdoor unit can be
reduced by about 3-4 dB.
The low noise mode will be activated when a commercially available timer or the
contact input of an ON/OFF switch is added to the CNDM connector (option) on the
control board of the outdoor unit.
• The ability varies according to the outdoor temperature and conditions, etc.
1
Complete the circuit as shown when using the external input adapter
(PAC-SC36NA-E). (Option)
2
SW7-1 (Outdoor unit control board): OFF
3
SW1 ON: Low noise mode
SW1 OFF: Normal operation
A
Circuit diagram example (low noise mode)
B
On-site arrangement
C
External input adapter (PAC-SC36NA-E)
X: Relay
D
Outdoor unit control board
E
Max. 10 m
F
Power supply for relay
p
u
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v
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s
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,
Perform the following procedures to collect the refrigerant when moving the indoor
unit or the outdoor unit.
1
Supply power (circuit breaker).
* When power is supplied, make sure that “CENTRALLY CONTROLLED” is not
displayed on the remote controller. If “CENTRALLY CONTROLLED” is dis-
played, the refrigerant collecting (pump down) cannot be completed normally.
* Start-up of the indoor-outdoor communication takes about 3 minutes after the
power (circuit breaker) is turned on. Start the pump-down operation 3 to 4
minutes after the power (circuit breaker) is turned ON.
* In the case of multi-units control, before powering on, disconnect the wiring
between the master indoor unit and the slave indoor unit. For more details
refer to the installation manual for the indoor unit.
2
After the liquid stop valve is closed, set the SWP switch on the control board of
the outdoor unit to ON. The compressor (outdoor unit) and ventilators (indoor and
outdoor units) start operating and refrigerant collecting operation begins. LED1
and LED2 on the control board of the outdoor unit are lit.
* Only set the SWP switch (push-button type) to ON if the unit is stopped. How-
ever, even if the unit is stopped and the SWP switch is set to ON less than 3
minutes after the compressor stops, the refrigerant collecting operation cannot
be performed. Wait until compressor has been stopped for 3 minutes and then
set the SWP switch to ON again.
A
p
3
Because the unit automatically stops in about 2 to 3 minutes when the refrigerant
collecting operation is completed (LED1 off, LED2 lit), be sure to quickly close the
gas stop valve. If LED1 is lit and LED2 is off and the outdoor unit is stopped, refrig-
erant collection is not properly performed. Open the liquid stop valve completely,
and then repeat step
2
after 3 minutes have passed.
* If the refrigerant collecting operation has been completed normally (LED1 off,
LED2 lit), the unit will remain stopped until the power supply is turned off.
4
Turn off the power supply (circuit breaker).
* Note that when the extension piping is very long with large refrigerant amount,
it may not be possible to perform a pump-down operation. When performing
the pump-down operation, make sure that the low pressure is lowered to near
0 MPa (gauge).
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Set the refrigerant address using the DIP switch of the outdoor unit.
SW1 Function Setting
SW1 Setting
Refrigerant
address
SW1 Setting
Refrigerant
address
ON
OFF
3 4 5 6 7
00
ON
OFF
3 4 5 6 7
03
ON
OFF
3 4 5 6 7
01
ON
OFF
3 4 5 6 7
04
ON
OFF
3 4 5 6 7
02
ON
OFF
3 4 5 6 7
05
Outdoor model
PUHZ-SW50VKA
PUHZ-SW75VHA
PUHZ-SW100VHA PUHZ-SW120VHA PUHZ-SW100YHA PUHZ-SW120YHA
Power supply
V / Phase / Hz
230 / Single / 50
400 / Three / 50
Dimensions (W × H × D)
mm
809 × 630 × 360
950 × 943 × 330(+30)
950 × 1350 × 330(+30)
Sound Level *1
SPL
Heating
dB(A)
46
51
54
54
54
54
Cooling
dB(A)
46
48
50
51
50
51
PWL
Heating
dB(A)
63
69
70
72
70
72
*1 Measured under rated operation frequency.
Orange
Brown
Red
Summary of Contents for PUHZ-SW HA Series
Page 17: ......