Daikin SERHQ020BAW1, Инструкция по установке и эксплуатации

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5 Installation
Installation and operation manual
18
SERHQ020~0 SEHVX20~64BAW
Split packaged air-cooled water chiller
4P508019-2B – 2018.01
WARNING
▪ Only use R410A as refrigerant. Other substances may
cause explosions and accidents.
▪ R410A contains fluorinated greenhouse gases. Its
global warming potential (GWP) value is 2087.5. Do
NOT vent these gases into the atmosphere.
▪ When charging refrigerant, always use protective
gloves and safety glasses.
NOTICE
If the power of some units is turned off, the charging
procedure cannot be finished properly.
NOTICE
Be sure to turn on the power 6 hours before operation in
order to have power running to the crankcase heater and
to protect the compressor.
NOTICE
If operation is performed within 12 minutes after the indoor
and outdoor units are turned on, the H2P LED will be lit
and the compressor will not operate before communication
is established between outdoor unit(s) and indoor units.
NOTICE
Close the front panel before any refrigerant charge
operation is executed. Without the front panel attached the
unit cannot judge correctly whether it is operating properly
or not.
NOTICE
In case of maintenance and the system (outdoor unit+field
indoor units) does not contain any refrigerant any
more (e.g., after refrigerant reclaim operation), the unit has
to be charged with its original amount of refrigerant (refer
to the nameplate on the unit) by pre-charging before the
automatic charging function can be started.
NOTICE
▪ The refrigerant charging port is connected to the piping
inside the unit. The unit's internal piping is already
factory charged with refrigerant, so be careful when
connecting the charge hose.
▪ After adding the refrigerant, do not forget to close the
lid of the refrigerant charging port. The tightening
torque for the lid is 11.5 to 13.9 N•m.
▪ In order to ensure uniform refrigerant distribution, it
may take the compressor ±10 minutes to start up after
the unit has started operation. This is not a malfunction.
5.6.3 To determine the additional refrigerant
amount
INFORMATION
For final charge adjustment in a test laboratory, contact
your dealer.
The additional refrigerant charge calculation is based on the liquid
piping size.
Formula:
R=(X
Ø9.52
×0.059)+(X
Ø12.7
×0.12)
R Additional refrigerant to be charged [in kg and rounded off
to 1 decimal place]
X
1, 2
Total length [m] of liquid piping size at Øa
Example
SEHV 2× SERHQ032BAW1
R=(L1+L2)
Ø12.7
×0.12
5.6.4 To charge refrigerant
Pre-charging refrigerant
1 Calculate the additional amount of refrigerant to be added using
the formula mentioned in
"5.6.3 To determine the additional
refrigerant amount" on page 18 .
2 The amount to be pre-charged is 10 kg less than the calculated
amount.
3 Open valve C (valves A and B and the stop valves must be left
closed) and charge the refrigerant in liquid form via the liquid
side stop valve service port.
4 Close valve C when the calculated amount for pre-charging is
reached.
m
n
c
e
d
b
a
g
h
i
f
j
k
l
a Weighing scales
b Refrigerant R410A tank (siphon system)
c Charge hose
d Liquid line stop valve
e Gas line stop valve
f Stop valve service port
g Valve B
h Valve C
i Valve A
j Refrigerant charge port
k Interunit piping
l Refrigerant piping
m Field piping
n Gas flow
NOTICE
In case of maintenance and the system (outdoor unit+field
indoor units) does not contain any refrigerant any
more (e.g., after refrigerant reclaim operation), the unit has
to be charged with its original amount of refrigerant (refer
to the nameplate on the unit) by pre-charging before the
automatic charging function can be started.
INFORMATION
The refrigerant will be charged with ±22 kg in 1 hour time
at an outdoor temperature of 30°C DB or with ±6 kg at an
outdoor temperature of 0°C DB.
5 After pre-charging, connect valve A to the refrigerant charge
port and charge the remaining additional refrigerant through this
port.
Step 6a: To automatically charge refrigerant
INFORMATION
The automatic refrigerant charging has limits as described
below. Out of these limits, the system cannot operate the
automatic refrigerant charging:
▪ Outdoor temperature: 0~43°C DB.
▪ Indoor temperature: 20~32°C DB.
▪ Total indoor unit capacity: ≥80%.
The remaining additional refrigerant charge can be charged by
operating the outdoor unit by means of the automatic refrigerant
charge operation mode.