GENERAL DISASSEMBLY of 52s unit

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Maintenance > GENERAL DISASSEMBLY of 52s unit

Question:
What are the general dissambly instructions for the 52s?

Answer:
This section includes common procedures for disassembly and reassembly of 52s units. These instructions are general in nature and include procedures the technician may be called upon to perform when accessing certain components of the 52s unit.

GENERAL DISASSEMBLY
This section includes common procedures for disassembly and reassembly of 52S units. These instructions are general in nature and include procedures the technician may be called upon to perform when accessing certain components of the 52S unit.

It is important to carefully follow manufacturer's instructions when disassembling or reassembling a unit for cleaning, maintenance, or part replacement. When disassembling wiring, it is strongly recommended that numbered stickers be attached to identify leads and terminals to aid in the reassembly process. Always review safety procedures prior to the start of a job.

WARNING
Prior to servicing electrical equipment, disconnect all power to avoid electric shock! Never alter cord or plug and do not use extension cords.

TO DISCONNECT POWER FOR CORD CONNECTED UNIT
1. Push OFF button.

2. Open the disconnect switch at main power supply. Use proper Lockout and Tag procedures.

3. Unplug the unit service cord.

TO DISCONNECT POWER FOR PERMANENTLY CONNECTED (HARDWIRED) UNITS
1. Push OFF button.

2. Open the disconnect switch at main power supply. Use proper Lockout and Tag procedures.

3. Remove screw from access cover and remove access cover.

4. Pull out the plug assembly and disconnect (see Figure 4).

GeneralDisassembly

FIGURE 4 - DISCONNECTING PLUG ASSEMBLY ON HARDWIRED UNITS

TO OPEN THE CONTROL BOX
The control box is factory wired. To open the control box, remove the 2 screws on the front of the control box and lower the front hinged panel. See Figure 5.

GeneralDisassembly

FIGURE 5 - OPEN CONTROL BOX

TO REMOVE THE UNIT FROM THE WALL SLEEVE
1. Remove the four, 1 3/4-in. mounting screws that secure the unit to the wall sleeve. There are 2 screws on each side (Figure 6).

GeneralDisassembly

FIGURE 6 - UNIT TO WALL SLEEVE MOUNTING SCREWS

2. Grasp the sides of the unit and slide it from the sleeve.

CAUTION
The chassis weighs between 110 and 150 pounds. Take proper safety precautions to avoid personal injury when lifting and moving the chassis.

CAUTION
The unit basepan may have water in it. Tilt the unit back slightly when removing it from the sleeve to drain some of the water into the sleeve.

TO REMOVE THE LATERAL DUCT EXTENSION, FOR UNITS EQUIPPED WITH THE LATERAL DUCT ACCESSORY PACKAGE
1. Remove the front panel.

2. Remove the four 13/4-in. screws that secure the chassis to the wall sleeve (see Figure 6). There are 2 screws on each side.

3. Remove the 2 screws that secure the lateral duct extension to the top of the lateral duct adapter (as shown in Figure 7).

GeneralDisassembly

FIGURE 7 - DUCT EXTENSION SCREWS

4. Locate and remove the 2 screws that secure the lateral duct extension to the bracket flange (as shown in Figure 8).

GeneralDisassembly

FIGURE 8 - BRACKET FLANGE SCREWS

5. Carefully slide the chassis away from the extension duct and remove from the sleeve (as shown in Figure 9).

GeneralDisassembly

FIGURE 9 - PARTIAL REMOVAL OF CHASSIS FROM WALL SLEEVE

CAUTION
The unit basepan may have water in it. Tilt the unit back slightly when removing it from the sleeve to drain some of the water into the sleeve.

CAUTION
The chassis weighs between 110 and 150 pounds. Take proper safety precautions to avoid personal injury when lifting and moving the chassis.

TO ACCESS INDOOR-AIR SECTION COMPONENTS
DISASSEMBLING THE LATERAL DUCT ADAPTER, FOR UNITS EQUIPPED WITH THE LATERAL DUCT ACCESSORY PACKAGE

1. Remove the lateral duct adapter end cap, shown in Figure 10, by removing the two V2-in. screws.

GeneralDisassembly

FIGURE 10 - WALL SLEEVE, DUCT ADAPTER, AND EXTENSION LOCATION (RIGHT-HAND EXTENSION)

2. Remove the adapter top panel by removing one screw at each end of unit as shown in Figure 11. Rotate the front of the panel up and back and lift free.

GeneralDisassembly

FIGURE 11 - DISCHARGE PLENUM ASSEMBLY

3. Rotate and lift the air baffle out of the unit. See Figure 12.

GeneralDisassembly

FIGURE 12 - REMOVING THE AIR BAFFLE

4. Remove the 2 screws holding the duct adapter to the chassis discharge air opening flanges, (as shown in Figure 13), and remove the duct adapter.

GeneralDisassembly

FIGURE 13 - REMOVING THE DUCT ADAPTER

TO REMOVE THE AIR DISCHARGE GRILLE
1. Remove the 2 screws on each end of the air discharge grille as shown in Figure 14.

GeneralDisassembly

FIGURE 14 - REMOVING AIR DISCHARGE GRILLE

2. Lift and rotate back the bottom edge of the discharge grille and remove it.

TO REMOVE THE ALUMINUM TOP PANEL
1. Remove one screw from each end of the aluminum top panel (located on the underside of the panel) as shown in Figure 15. On the left side of the unit, remove the screw closest to the side of the unit.

GeneralDisassembly

FIGURE 15 - ALUMINUM TOP PANEL

TO REMOVE THE TOP COVER
1. Remove the screw located in the middle of the top cover and remove the cover. See Figure 16.

GeneralDisassembly

FIGURE 16 - TOP COVER SCREW

TO REMOVE THE DISCHARGE DECK
1. Remove the 2 discharge deck screws shown in Figure 17. Also remove the screw located at the top left corner of the outdoor coil tube sheet.

2. Gently pull the left side panel out and lift the end of the discharge deck that the screws were removed from, up and forward, to remove.

GeneralDisassembly

FIGURE 17 - DISCHARGE DECK REMOVAL

TO ACCESS OUTDOOR-AIR SECTION COMPONENTS
TO ACCESS OUTDOOR-AIR SECTION COMPONENTS

TO REMOVE THE GUSSET

1. Remove the 2 screws that secure the gusset to the partition.

2. Remove the screw that secures the gusset to the plastic condenser orifice and remove the gusset. See Figure 18.

GeneralDisassembly

FIGURE 18 - GUSSET REMOVAL

TO DETACH THE CONDENSER ORIFICE FROM THE CONDENSER COIL
1. Using a flat head screw driver, gently pry the plastic condenser orifice tabs away from both condenser coil tube sheets and pull the condenser orifice away as shown in Figure 19.

GeneralDisassembly

FIGURE 19 - REMOVING CONDENSER ORIFICE

TO REMOVE THE STATOR
1. After pulling the top of the condenser orifice away from the condenser coil, grasp the top of the stator and slide it up and out of the stator track. See Figure 20.

GeneralDisassembly

FIGURE 20 - REMOVING STATOR


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