Lennox International Inc Merit Series Air Conditioner Wrap Service Valves, Flow Nitrogen

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WRAP SERVICE VALVES

To help protect service valve seals during brazing, wrap water-saturated cloths around service valve bodies and copper tube stubs. Use additional water-saturated cloths underneath the valve body to protect the base paint.

FLOW NITROGEN

Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration gauge set into the valve stem port connection on the liquid service valve and out of the suction / vapor valve stem port. See steps 3A, 3B and 3C on manifold gauge set connections.

6BRAZE LINE SET

Wrap both service valves with water -saturated cloths as illustrated here and as mentioned in step 4, before brazing to line set. Cloths must remain water-saturated throughout the brazing and cool-down process.

LIQUID LINE SERVICE VALVE

WHEN BRAZING LINE SET TO

SERVICE VALVES, POINT FLAME

AWAY FROM SERVICE VALVE.

IMPORTANT — Allow braze joint to cool. Apply additional water-saturated cloths to help cool brazed joint. Do not remove water-saturated cloths until piping has cooled. Temperatures above 250ºF will damage valve seals.

WARNING

FIRE, PERSONAL INJURY, OR PROPERTY DAMAGE

may result if you do not wrap a water-saturated cloth around both liquid and suction line service valve bodies and copper tube stub while brazing the line set! The braze, when complete, must be quenched with water to absorb any residual heat.

Do not open service valves until refrigerant lines and indoor coil have been leak-tested and evacuated. Refer to Installation and Service Procedures manual found on

DAVENET.

SUCTION / VAPOR LINE

WATER-SATURATED

CLOTH

LIQUID LINE

SUCTION / VAPOR LINE

SERVICE VALVE

WHEN BRAZING LINE SET TO

SERVICE VALVES, POINT FLAME

AWAY FROM SERVICE VALVE.

WATER-SATURATED

CLOTH

7PREPARATION FOR NEXT STEP

After all connections have been brazed, disconnect manifold gauge set from service ports. Apply additional water-saturated cloths to both services valves to cool piping. Once piping is cool, remove all water-saturated cloths.

FIGURE 9

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13ACX SERIES

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Contents General Setting the Unit -- ClearancesMinimum Clearance Between TWO Units Placement Setting the Unit CONTIN­ UED -- Unit PlacementUnit Dimensions Inches MM Unit DimensionsVertical Runs NEW Construction Shown InstallationRefrigerant Line SET Installing Refrigerant Line SET Installing Horizontal RunsTypical Liquid Line Filter Drier Installation Liquid Line Filter Drier InstallationRefrigerant Line SET Inches MM 2CONNECT Gauges and Equipment for Flushing Procedure 1CUT and Debur Refrigerant Piping -- Brazing Procedures7PREPARATION for Next Step Wrap Service ValvesFlow Nitrogen 6BRAZE Line SETEqualizer Line Installation Refrigerant Piping -- Installing Indoor Expansion ValveIndoor Expansion Valve Installation Sensing Bulb InstallationLeak Test Leak Test and EvacuationOpen both manifold valves and start the vacuum pump Evacuation24VAC Transformer Electrical -- Circuit Sizing and Wire RoutingSize Circuit and Install Service Disconnect Switch Install ThermostatOperating Manifold Gauge SET and Service Valves Electrical -- High Voltage and Field Control WiringRouting High VOLTAGE, Ground and Control Wiring High Voltage / Ground Wires Field Control WiringTorque Requirements Homeowners Information Checking and Adding System RefrigerantCooling Mode 13ACX Start-Up and Performance ChecklistStart UP Checks
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