Sanyo 8.53E+13 installation instructions Basic Functions of the Service Valves, Pump Down

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■Basic Functions of the Service Valves

The basic functions of the service valves are given in Table 8 below.

Table 8

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

 

 

*

The service port on the wide tube ser-

Air purging with

*

vice valve uses a Schrader core valve

a vacuum pump

 

to access the refrigerant system.

 

 

Therefore, be sure to use a hose con-

 

 

nector which has a push-pin inside.

 

 

(Fig. 60a)

Service valve

CAUTION

Hose with push-pin

 

 

Close

When opening or clos-

ing the service valve

 

PUSH

Open

 

stem, use the accessory

 

Hex

Fig. 60a

hex wrench. Be sure to

wrench

 

 

 

fully seat the wrench

Fig. 60b

 

before turning the valve.

 

 

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

(3)Press the operation button and start cooling oper- ation.

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

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

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Contents Installation Instructions Contents…In a Room For safe installation and trouble-free operation, you must…In a Ceiling or Wall …In Moist or Uneven LocationsGeneral Tools Required for Installation not suppliedAccessories Supplied with Unit Table Optional Copper Tubing KitIndoor Unit Installation Site SelectionAdditional Materials Required for Installation Front ViewSolid base must not cover Outdoor UnitHole of the bottom plate Remove the Rear Panel from the Unit How to Install the Indoor UnitTrical wiring or conduits are Make a HoleIf Block, Brick, Concrete or Similar Type Wall Install the Rear Panel on the WallIf Wooden Wall Hole DiaRemove the Grille to Install the Indoor Unit How to replace the grilleWiring Instructions General precautions on wiring Shape the Indoor Side TubingRecommended Wire Length and Diameter Wiring Instructions for Inter-unit Connections For Outdoor Unit For solid core wiring or F-cable How to connect wiring to the terminal For Indoor UnitFor stranded wiring Mounting Right-side tubingDrain hose Switching drain hose and drain capLeft-side tubing Drain capTo unmount indoor unit Do not supply power toTubing and wiring to the out Unit or operate it until allHow to Install the Outdoor Unit Wiring Instructions for the Outdoor UnitRefrigerant Tubing Flaring Procedure with a Flare ToolTo 0.5 mm Adjust so that the amount of tube Use of the Flaring MethodInsulation of Refrigerant Tubing Connecting Tubing between Indoor and Outdoor UnitsFinishing the Installation Tube Dia Tightening TorqueAir Purging Hex wrench before Be sure to completely insertAttempting to turn the valve How to Test Run the Air Conditioner Operation lamp Timer lamp Quiet lamp ION lampBasic Functions of the Service Valves Pump DownTo take out the remote control unit, pull it forward Remote Control Unit Installation PositionMounting on a Wall Address Switch Address Setting of the Remote Control Unit

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