Daikin REYQ8-48PY1B, Руководство по обслуживанию

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SiBE37-701_B Test Operation
Test Operation 160
1.2.3 Air Tight Test and Vacuum Drying
Note:
„
Always use nitrogen gas for the air tight test.
„
Absolutely do not open the stop valve until the main power circuit insulation measurement
has been completed. (measuring after the shutoff valve is opened will cause the insulation
value to drop.)
<Needed tools>
<The system for air tight test and vacuum drying>
•
Referring to next figure, connect an nitrogen tank, refrigerant tank, and a vacuum pump to the
outdoor unit.
The refrigerant tank and the charge hose connection to refrigerant charge port or the valve A
in next figure are needed in
“1.2.5 Additional Refrigerant Charge and Check Operation”.
REYQ8~16PY1B
REYQ18~48P7Y1B
Note:
„
The air tight test and vacuum drying should be done using the service
ports of equalizer pipe, HP/LP gas pipe, suction gas pipe and liquid pipe
stop valve.
See the [R-410A] Label attached to the front plate of the outdoor unit for
details on the location of the service port (see figure at right)
„
See [Stop valve operation procedure] in “1.2.5.1 Before Working” for
details on handling the stop valve.
„
The refrigerant charge port is connected to unit pipe.
When shipped, the unit contains the refrigerant, so use caution when attaching the charge
hose.
Gauge manifold
Charge hose valve
• To prevent entry of any impurities and insure sufficient pressure resistance,
always use the special tools dedicated for R-410A.
• Use charge hose that have pushing stick for connecting to service port of stop
valves or refrigerant charge port.
Vacuum pump
• The vacuum pump for vacuum drying should be able to lower the pressure to
–100.7kPa (5 Torr –755mm Hg).
• Take care the pump oil never flow backward into the refrigerant pipe during
the pump stops.
Gauge manifold
R-410A tank (with siphon)
Measuring
device
N
itr
ogen
Charge hose
Vacuum pump
: Field piping
: Gas flow
Valve C
Valve A
Valve B
Refrigerant charge port
HP/LP gas pipe stop valve
Suction gas pipe stop valve
Liquid pipe stop valve
Outdoor unit
To BS
(or indoor) unit
: Stop valve
( : Service port )
Gauge manifold
R-410A tank
(with siphon)
M
eas
ur
in
g
dev
ic
e
N
itr
oge
n
Vacuum pump
: Field piping
: Gas flow
Charge hose
Equalizer pipe stop valve
HP/LP gas pipe stop valve
Suction gas pipe stop valve
Liquid pipe stop valve
Refrigerant charge port
Valve A
Valve B
Valve C
To BS
(or indoor) unit
: Stop valve
( : Service port )
Outdoor
unit
Outdoor
unit
Outdoor
unit
[R-410A] Label