-
55
-
'11 • KX-T-166
( )
①
Delivery and installation of indoor and outdoor units
Turn on the circuit breakers on the indoor and outdoor units.
Remove the front panels from the outdoor unit, service valve kit and re-fresh kit.
Confirm that there is no anomaly in the number of indoor units to be connected, their address numbers and appearance.
Check the outdoor air temperature and the indoor air temperature.
②
Connection of the re-fresh kit
Confirmation of oil draining
Oil drain port is opened upward. Connect the flared fitting and lead the pipe to the drain oil container. (Work at site)
Open the service valve at the oil drain hole on the re-fresh kit.
Supply pressurized nitrogen from the check joint of re-fresh kit to drain oil.
[Open]
the
[Service valve at the oil drain hole on the re-fresh kit]
.
Connection of the flexible tube
Remove the plate and the gasket from the flange on the service valve kit.
Remove the plate and the gasket from the re-fresh kit.
Remove the vinyl from the flexible tube.
Using the attached bolts and gasket (supplied items), connect the flexible tube to the flange of service valve kit.
Using the attached bolts and gasket (supplied items), connect the flexible tube to the flange of re-fresh kit.
Connection of bypass gas pipe (Flared: ø9.52)
Connect the bypass gas pipe to the bypass gas service valve of outdoor unit. (Flared connection)
Connect the bypass gas pipe to the bypass gas service valve of re-fresh kit. (Flared connection)
Connect the gauge manifolds or pressure gauges (work at site) at two places of the left (Inlet side) and right (Outlet side) check joints on the re-fresh kit.
③
Air tightness test (Airtight test of the re-fresh kit, flexible tube and bypass gas pipe)
[Open]
the
[Bypass gas service valve of re-fresh kit]
.
Check the air-tightness at the
[Check joint of service valve A]
on the service valve kit. (2.21 MPa)
④
Air purge
Release the pressure in the re-fresh kit through the
[Check joint of service valve C]
on the service valve kit to atmosphere.
Vacuumize through the
[Check joint of service valve C]
on the service valve kit to atmosphere.
Open the
[Service valve A]
on the service valve kit to confirm that the inside of the pipe connected at site is vacuumized.
⑤
Additional charge of refrigerant
Charge the refrigerant for the pipe through the
[Check joint of liquid service valve]
.
(Never charge from the gas side.)
⑥
Pipe washing operation
[Open]
the
[Service valve C]
on the service valve kit and the
[Bypass gas service valve]
on the outdoor unit.
[Close]
the
[Service valve B]
on the service valve kit.
[Open]
only the
[Liquid service valve]
. (Keep closing the gas service valve B on the service valve kit.)
Make sure to insert the
[CNS1]
(External operation input) connector.
Turn
[ON]
the
[SW3-6]
. (Pipe washing operation starts.)
Charge additionally the portion of refrigerant, which could not be charged at the step
⑤
, through the
[Check joint of
service valve C]
on the service valve kit. Never use the check joints of service valves A and B for the additional charge.
Record the reading on the pressure gauge when the remaining time on 7 SEG is 60 – 65 minutes.
Washing operation is completed if the followings are displayed on 7 SEG.
Display
①
: PCL End
Display
②
: PCL ---
[Close]
the
[Service valves A, C]
on the service valve kit and the
[Bypass gas service valve]
on the outdoor unit.
[Open]
the
[Service valve B]
on the service valve kit.
Turn
[OFF]
the
[SW3-6]
.
⑦
Removal of the re-fresh kit
Removal of the flexible tube and the bypass gas pipe
[Collect refrigerant]
in the re-fresh kit through the check joint on the service valve C of service valve kit.
Open up the inside of re-fresh kit to atmosphere.
[Close]
the
[Bypass gas service valve of re-fresh kit]
.
Remove the flexible hose and the bypass gas pipe.
Install the flare nut and flare cap on the bypass gas service valve of outdoor unit.
Install the flare nut and flare cap on the bypass gas service valve of re-fresh kit.
Install the plate and gasket on the flange of service valve kit.
[Vacuumize]
through the
[Check joints of service valves A, C]
on the service valve kit.
[Open]
the
[Service valves A, C]
on the service valve kit. Check then the flange section of service valve kit for leakage,
using soap water or other.
Install the plate and gasket on the flange of re-fresh kit.
Install the vinyl, which has been removed at the step
②
, on the flexible hose flange.
Remove the gauge manifolds from the check joints.
⑧
Oil draining from the re-fresh kit
Drain oil from the re-fresh kit by opening the service valve at the oil drain hole.
⑨
Replacement of the filter of filter dryer
Replace the filter when the differential pressure on the pressure gauge has exceeded 0.1 MPa.
⑩
Replenishment of refrigerating machine oil to the unit
•
Confirm that pipes connected to the indoor and outdoor units have been vacuumized.
• Turn on the switch of crankcase heater.
• Use 7 SEG display, Mente PC, etc.
• Use the code No. C02 of 7 SEG to display the outdoor air temperature.
• Record the temperature on the “Outdoor air temperature” in the following table.
• It will not be washed properly if it is out of the range of use. (Indoor: 10 – 35°C, outdoor: 5 – 35°C.)
• Size of oil drain hole is ø15.88.
• The plate must be attached to the flange of re-fresh kit.
• Raise the pressure gradually. Confirm that oil has been drained, before going to next step.
• Bolt tightening torque is 25 – 30 (N·m).
• Width across flat on the bolt is 17 mm.
• Retain the plate with care to protect from dust, till the end of washing.
• Retain the vinyl and rubber ring with care to protect from dust, till the end of washing.
• Always use new gasket (Parts No.: PCA005A061).
• Coat the gasket with refrigerating machine oil before installation. (For ease of attachment)
• Flare the end of bypass gas pipe at site.
• Tightening torque is 38±4 (N·m).
• Retain the removed flare nut and flare cap with care to protect from dust, till the end of washing.
• Different flange hole pitches are used on both ends to prevent misconnection.
• Tightening torque is 38±4 (N·m).
• Pressurize gradually.
• Make the additional charge from the liquid side. Follow the step
⑥
if it cannot be charged fully.
• Record the charge amount. (“Additional charge amount
①
” in the following table)
•
Turn off the SW3-6 to stop the operation in the event of an emergency.
• It cannot be washed properly if the connector CNS1 is disconnected.
• Charge in the liquid phase, and record the charge amount. (“Additional charge amount
②
” in the following table)
• Record the readings on the pressure gauges connected to the check joints. (“Pressure gauge (check joint L)” and “Pressure gauge (check joint R)” in the following table)
• It can be input from individual indoor units.
• Collect a small amount of refrigerant remaining in the re-fresh kit. (Provide a refrigerant collecting device.)
• Make an additional charge to the system for the amount of collected refrigerant, and record the amount.
(“Additional charge amount
③
” in the following table)
• Tightening torque is 38±4 (N∙m).
• Insert the used gasket, which has been removed for pipe washing, between the flange and the plate.
• Take care to protect the flange face and the inside of flexible tube from dust.
• This is necessary whenever the washing operation has been completed.
• Check this in the same way as the confirmation of oil draining of the step
②
.
• For the replacement method, refer to the instruction manual of the re-fresh kit.
• Replenish 450 mL of refrigerating machine oil (new MA32R oil) after completing the washing operation.
• For the replenishment method, refer to the instruction manual of the re-fresh kit.
Customer :
Outdoor unit model/Serial No. : /
Additional refrigerant charge amount/Total pipe length : kg / m
Additional charge amount
①
Additional charge amount
②
Additional charge amount
③
kg
kg
kg
Outdoor air temperature
Indoor air temperature
°C
°C
Collected oil amount
g
Pressure gauge (check joint L)
Pressure gauge (check joint R)
Differential pressure (L-R)
MPa
MPa
MPa
Date of washing operation
Person who washed : (Affiliation)
(Name)
Checked by :
(Affiliation)
(Name)
PSB012D869G
* Use this Check Sheet when washing pipes using the re-fresh kit.
* Original Sheet: Carefully handle the original Check Sheet because
it is retained by the distributor.
<
Outdoor unit
>
<
Service valve kit
>
Bypass gas pipe
service valve
Service valve B
To outdoor unit
To indoor unit
Service valve C
Service valve A
Liquid service valve
(To indoor unit)
Flared connection
to re-fresh kit
( )
To outdoor unit side pipe
of service valve kit
Outdoor gas pipe
J
Check
Caution, etc.
Person in
charge
Checked
by
• It is completed at about 60 minutes. (It may take about 120 minutes at the maximum when the outdoor air temperature is low.)
• The gas pipe is in the state of pump down, at the end of washing.
• When the display
②
is shown, check to see if oil has been drained from the re-fresh kit, and repeat the washing operation.
(Up to 2 times at the maximum)
[Steps] Close the service valves A and C and the bypass gas service valve at outdoor side.
�
Collect refrigerant through the check joint
of service valve C.
�
Confirmation of oil draining by the step
②
above
�
Vacuumizing through the check joint of service valve
C
�
Open the service valves A and C and the bypass gas service valve.
�
Turn off SW3-6 once and then back on again.
• Outdoor fan is turned on, and 7 SEG shows the remaining time (approximate value).
• Compressor starts to run 2 minutes later, and the washing operation starts.
• Indoor unit start the cooling operation if the remaining time is reduced to about 75 minutes.
• Avoid touching the bypass gas pipe because it could become very hot.
• Since it is now controlled with the central control (the center mode) from the outdoor unit, controls from individual indoor units
are disabled.
• Use the new gasket (Parts No.: SSA932A004T), which is attached to the outdoor unit.
•
Bolt tightening torque is 25 – 30 (N·m).
Tighten the bolt homogeneously by tightening alternately at top and bottom for more than 2 times.
Finish up the tightening by retightening the bolt to the specified torque.
Description of operation
<
Inside of re-fresh kit
>
Check joint L (Inlet side)
Check joint R (Outlet side)
Bypass gas service valve
Oil drain hole service valve
6.8
Pipe washing check sheet
