562156-UIM-A-0610

2.Remove the cap and Schrader core from both the liquid and vapor service valve service ports at the outdoor unit. Connect low pressure nitrogen to the liquid line service port.

3.Braze the liquid line to the liquid valve at the outdoor unit. Be sure to wrap the valve body with a wet rag. Allow the nitrogen to continue flowing.

4.Relieve the holding charge from the indoor coil by depressing the Schrader valve stem located in the end of the suction line. Cut the spundown copper to allow installation of the suction line.

FIGURE 4: Heat Protection

The evaporator is pressurized.

5.If TXV has not been installed refer to Page 3 “TXV INSTALLA- TIONS”.

6.Braze the liquid line to the evaporator liquid connection. Nitrogen should be flowing through the evaporator coil.

7.Slide the grommet away from the vapor connection at the indoor coil. Braze the vapor line to the evaporator vapor connection. After the connection has cooled, slide the grommet back into original position.

a.Install the TXV bulb to the vapor line near the equalizer line, using the bulb clamp(s) furnished with the TXV assembly. Ensure the bulb is making maximum contact. For detailed instructions, refer to the Installation Instructions accompanying the TXV kit.

b.Bulb should be installed on a horizontal run of the vapor line if possible. The bulb should be installed on top of the line.

c.If bulb installation is made on a vertical run, the bulb should be located at least 16 inches from any bend, and on the tubing sides opposite the plane of the bend. The bulb should be positioned with the bulb tail at the top, so that the bulb acts as a reservoir.

d.Bulb should be insulated using thermal insulation provided to pro- tect it from the effect of the surrounding ambient temperature. Cover completely to insulate from air-stream.

In all cases, mount the TXV bulb after vapor line is brazed and has had sufficient time to cool.

8.Protect the vapor valve with a wet rag and braze the vapor line con- nection to the outdoor unit. The nitrogen flow should be exiting the system from the vapor service port connection. After this connection has cooled, remove the nitrogen source from the liquid fitting service port.

9.Replace the Schrader core in the liquid and vapor valves.

10.Leak test all refrigerant piping connections.

NOTICE

Line set and indoor coil can be pressurized to 250 psig with dry nitrogen and leak tested with a bubble type leak detector. Then release the nitrogen charge.

NOTICE

Do not use the system refrigerant in the outdoor unit to purge or leak test.

Never attempt to repair any brazed connections while the system is under pressure. Personal injury could result.

SECTION IV: EVACUATION

1.It will be necessary to evacuate the system to 500 microns or less. If a leak is suspected, leak test with dry nitrogen to locate the leak. Repair the leak and test again.

To verify that the system has no leaks, simply close the valve to the vacuum pump suction to isolate the pump and hold the system under vacuum. Watch the micron gauge for a few minutes. If the micron gauge indicates a steady and continuous rise, it’s an indica- tion of a leak. If the gauge shows a rise, then levels off after a few minutes and remains fairly constant, it’s an indication that the system is leak free but still contains moisture and may require further evacu- ation if the reading is above 500 microns.

2.While system is being evacuated proceed to SECTION V ”ELEC- TRICAL CONNECTIONS”. System charging will be covered under

SECTION VI ”SYSTEM CHARGE”

SECTION V: ELECTRICAL CONNECTIONS

GENERAL INFORMATION & GROUNDING

Check the electrical supply to be sure that it meets the values specified on the unit nameplate and wiring label.

Power wiring, control (low voltage) wiring, disconnect switches, and over current protection must be supplied by the installer. Wire size should be sized per NEC requirements.

All field wiring must USE COPPER CONDUCTORS ONLY and be in accordance with Local, National, Fire, Safety, & Electrical Codes. This unit must be grounded with a separate ground wire in accor- dance with the above codes.

The complete connection diagram and schematic wiring label is located on the inside surface of the unit service access panel.

Johnson Controls Unitary Products

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Johnson Controls AL6B SERIES Section IV Evacuation, Section V Electrical Connections, General Information & Grounding
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AL6B SERIES, AC6B, 16 SEER - CZF specifications

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