Instruction/ maintenance manual of the product 4AC18LT Allied Air Enterprises
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506469-01 Issue 1008 Page 1 of 24 The equipment covered in this manual is to be installed by trained and experienced service and installation technicians. Improper installation, modification, service, or use can cause electrical shock, fire, explosion, or other conditions which may cause personal injury , death, or property damage.
506469-01 Issue 1008 INST ALLA TION When servicing or repairing HV AC components, ensure the fasteners are appropriately tightened. T able 1 shows torque values for fasteners. Inspection of Shipment Upon receipt of equipment, carefully inspect it for possible shipping damage.
506469-01 Issue 1008 Roof Mounting Install unit at a minimum of 6” above surface of the roof to avoid ice buildup around the unit. Locate the unit above a load bearing wall or area of the roof that can adequately support the unit. Consult local codes for rooftop applications.
506469-01 Issue 1008 Placement Be aware that some localities are adopting sound ordinances based on how noisy the unit is at the neighbor ’ s home, not at the original installation. Install the unit as far as possible from the property line. When possible, do not install the unit directly outside a bedroom window .
506469-01 Issue 1008 Refrigerant Piping If the 4AC18L T unit is being installed with a new indoor coil and line set, the refrigerant connections should be made as outlined in this section.
506469-01 Issue 1008 6. Braze the line set to the service valve. Quench the joints with water or a wet cloth to prevent heat damage to the valve core and opening port. The tube end must sta y bottomed in the fitting during final assembly to ensure proper seating, sealing, and rigidity .
506469-01 Issue 1008 Page 7 of 24 Figure 8 Outside W all W ood Block Between Studs IMPOR T ANT: Refrigerant lines must not contact wall. V apor Line Liquid Line Wire Tie Inside W all Strap Slee ve Wir.
506469-01 Issue 1008 Flushing Existing Line Set and Indoor Coil This procedure should not be performed on systems which contain cont aminants, such as compressor burn out. Required Euipment The following equipment is needed to flush the existing line set and indoor coil (See Figure 9).
506469-01 Issue 1008 4. Remover the existing R-22 refrigerant flow control orifice or thermal expansion valve before continuing with flushing procedures. R-22 flow control devices are not approved for use with R410A refrigerant and may prevent proper flushing.
506469-01 Issue 1008 3. Connect the external equalizer line to the equalizer port on the suction line and tighten to 8 ft.lbs. 4. S trap the superheat sensing bulb to the suction header . If installing an exp ansion valve on an indoor coil that previously used a fixed orifice, be sure to remove the existing fixed orifice.
506469-01 Issue 1008 Using an Electronic Leak Detector 1. Connect the high pressure hose of the manifold gauge set to the suction valve service port. (Normally the high pressure hose is connected to the liquid line port; however , connecting it to the suction ports helps to protect the manifold gauge set from damage caused by high pressure.
506469-01 Issue 1008 4. Open both manifold valves and start vacuum pump. 5. Evacuate the line set and indoor unit to a minimum of 500 microns or lower . During the early stages of evacuation, it is desirable to close the manifold gauge valve at least once to determine if there is a rapid rise in pressure.
506469-01 Issue 1008 ST ART -UP 1. Rotate fan to check for frozen bearings or binding. 2. Inspect all factory and field-installed wiring for loose connections. 3. A f ter evacuation is complete, open liquid line and suction line service valves to release refrigerant charge (contained in outdoor unit) into system.
506469-01 Issue 1008 5. Compare the subcooling value with those shown in T able 6 on page 14. If subcooling is greater than shown, recover some refrigerant.
506469-01 Issue 1008 Page 15 of 24 6. Compare the approach value with those shown in T able 7. If the values do not agree with those provided in T able 7, add refrigerant to lower the approach temperature or recover refrigerant from the system to increase the approach temperature.
506469-01 Issue 1008 Page 16 of 24 T able 8.
506469-01 Issue 1008 OPERA TION Outdoor unit and indoor blower cycle on demand from the room thermostat. When the thermostat blower switch is moved to the ON position, the indoor blower operates continuously . System Diagnostic Module 4AC18L T unit s contain a diagnostic module for troubleshooting air conditioning system failures.
506469-01 Issue 1008 Page 18 of 24 T able 9 Flash Codes.
506469-01 Issue 1008 Page 19 of 24 T able 10 Flash Codes (cont.).
506469-01 Issue 1008 Page 20 of 24 T able 1 1 Miswired Module T roubleshooting.
506469-01 Issue 1008 MAINTENANCE Maintenance and service must be performed by a qualified installer or service agency . At the beginning of each cooling season, the system should be checked as follows: 1. Clean and inspect condenser coil. Coil may be flushed witha a water hose.
506469-01 Issue 1008 St art-Up and Performance Checklist Job Name _____________________________ Job No. ____________ Date ___________ Job Location ___________________________ City _______________ S tate ___________ Installer _______________________________ City _______________ S tate ___________ Unit Model No.
506469-01 Issue 1008 Page 23 of 24 WIRE DIAGRAM.
506469-01 Issue 1008 Page 24 of 24 NOTES.
An important point after buying a device Allied Air Enterprises 4AC18LT (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Allied Air Enterprises 4AC18LT yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Allied Air Enterprises 4AC18LT - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Allied Air Enterprises 4AC18LT you will learn all the available features of the product, as well as information on its operation. The information that you get Allied Air Enterprises 4AC18LT will certainly help you make a decision on the purchase.
If you already are a holder of Allied Air Enterprises 4AC18LT, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Allied Air Enterprises 4AC18LT.
However, one of the most important roles played by the user manual is to help in solving problems with Allied Air Enterprises 4AC18LT. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Allied Air Enterprises 4AC18LT along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
