Sanyo C1852, C1251, CL0951, CL1852, CL1251, C0951 installation instructions Air Purging

Page 18

6. Air Purging

Air and moisture remaining in the refrigerant system have undesirable effects as indicated below. Therefore, they must be purged completely.

●pressure in the system rises

●operating current rises

●cooling (or heating) efficiency drops

●moisture in the air may freeze and block capillary tubing

●water may lead to corrosion of parts in the refrigerant sys- tem

■Air Purging with a Vacuum Pump (for Test Run)

(1)

Check that each tube (both narrow and wide tubes)

 

between the indoor and outdoor units have been properly

 

connected and all wiring for the test run has been com-

 

pleted. Note that both narrow and wide tube service

 

valves on the outdoor unit are kept closed at this stage.

(2)

Using an adjustable wrench or box wrench, remove the

 

valve caps from the service valve on both narrow and

 

wide tubes.

Indoor unit

Outdoor unit

Manifold valve

Pressure

(3) Connect a vacuum pump and a manifold valve (with pres-

sure gauges) to the service port on the wide tube service

valve. (Fig. 52)

CAUTION

Be sure to use a manifold valve for

air purging. If it is not available, use

 

 

 

a stop valve for this purpose. The

 

“Hi” knob of the manifold valve

 

must always be kept closed.

gauge

Lo Hi

(4)With the “Lo” knob of the manifold valve open, run the vacuum pump. The operation time for the vacuum pump varies with tubing length and the capacity of the pump. The following table shows the amount of time for evacua- tion:

Table 6

Required time for evacuation when capacity

of 100 liter/h vacuum pump is used

If tubing length is

If tubing length is

less than 33 ft. (10 m)

more than 33 ft. (10 m)

 

 

10 min. or more

15 min. or more

 

 

NOTE

The required time in the above table is calculated based on the assumption that the ideal (or target) vacuum condition is around 10 mmHg abs.

Vacuum pump

Fig. 52

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Contents Installation Instructions ContentsCase of Improper Installation When TransportingWhen Installing… When WiringGeneral Installation Site Selection Additional Materials Required for InstallationOutdoor Unit Baffle Plate for the Outdoor Unit CL⋅⋅ models onlyRemove the Rear Panel from the Unit KS1852Case of right-rear Make a HoleInstall the Rear Panel on the Wall If Wooden WallIf Block, Brick, Concrete or Similar Type Wall Remove the Grille to Install the Indoor Unit How to remove the grilleHow to replace the grille Wiring Instructions General precautions on wiring Shape the Indoor Side TubingEach wire must be firmly connected Recommended Wire Length and DiameterWire from the outdoor unit to the indoor unit No wire should be allowed to touch refrigerantKS0951, KS1251 KS1852 How to connect wiring to the terminal For Indoor Unit For Outdoor Unit For solid core wiring or F-cableFor stranded wiring Mounting Right-side tubingTo unmount indoor unit Drain HoseRisk of Electric Shock Wiring Instructions for the Outdoor Unit How to Install the Outdoor UnitExamples of Incorrect Wiring ProblemUse of the Flaring Method Flaring Procedure with a Flare ToolRefrigerant Tubing DeburringInsulation of Refrigerant Tubing Connecting Tubing between Indoor and Outdoor UnitsFinishing the Installation After a tube has been insulatedAir Purging Be sure to completely insert Hex wrench beforeAttempting to turn the valve How to Test Run the Air Conditioner Basic Function of the Service Valves Pump DownRing Valve cap Stem When mounting the remote control unit to prevent theft Remote Control Unit Installation PositionWhen using the remote control unit Mounting on a Wall
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C0951, CL1251, CL1852, CL0951, C1251 specifications

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