Sanyo CL1852, C1852, C1251 Basic Function of the Service Valves, Pump Down, Ring Valve cap Stem

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Basic Function of the Service Valves

The basic function of the service valves are given in Table 7 below.

Table 7

Action

Narrow Tube Service

Wide Tube Service

Valve (2-Way)

Valve (3-Way)

 

 

CLOSED

O-ring

Valve cap

 

 

 

Stem

Shipping

Fully OPEN

Operating and test running

the air conditioner

 

Fully OPEN

Measuring pressure

*

and gas charging

 

 

CLOSED

Air purging with

*

a vacuum pump

 

*The service port on the wide tube service

valve uses a Schrader core valve to access

Service valve

Hose with push-pin

the refrigerant system. Therefore, be sure to

use a hose connector which has a push-pin

 

inside. (Fig. 55)

 

PUSH

Pump Down

Pump down means collecting all refrigerant gas in the system back into the outdoor unit without losing any of the gas. Pump down is used when the unit is to be moved or before servicing the refrigerant circuit.

Pump Down Procedure

Be sure to carry out pump down with the unit in cooling mode.

(1)Connect the Lo side charging hose of the manifold valve to the service port on the wide tube service valve.

(2)Using a hex wrench, turn the narrow tube service

Fig. 55

valve clockwise all the way to close the service valve. (Be sure to confirm that the wide tube ser- vice valve is fully open.)

(3)Press the operation button and start cooling opera- tion.

(4)When the low pressure gauge reading falls to 1 to 0.5 kg/cm2 (14.2 to 7.1 PSI), fully close the wide tube valve stem with a standard screwdriver. Then quickly stop the unit.

(5)Disconnect all gauges and hoses, and replace the bonnets and the valve caps as they were before.

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Contents Contents Installation InstructionsWhen Installing… When TransportingCase of Improper Installation When WiringGeneral Additional Materials Required for Installation Installation Site SelectionBaffle Plate for the Outdoor Unit CL⋅⋅ models only Outdoor UnitCase of right-rear KS1852Remove the Rear Panel from the Unit 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 Shape the Indoor Side Tubing Wiring Instructions General precautions on wiringWire from the outdoor unit to the indoor unit Recommended Wire Length and DiameterEach wire must be firmly connected 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 Right-side tubing MountingTo unmount indoor unit Drain HoseRisk of Electric Shock Examples of Incorrect Wiring How to Install the Outdoor UnitWiring Instructions for the Outdoor Unit ProblemRefrigerant Tubing Flaring Procedure with a Flare ToolUse of the Flaring Method DeburringFinishing the Installation Connecting Tubing between Indoor and Outdoor UnitsInsulation of Refrigerant Tubing 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 using the remote control unit Remote Control Unit Installation PositionWhen mounting the remote control unit to prevent theft Mounting on a Wall
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