LX and LT Pool Heaters | Page 11 |
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2.Remove the two hex head screws that hold the raceway cover in place. They are located on the bottom flange of the raceway cover. Slide the raceway cover down to expose the raceway.
3.Remove the control panel assembly from the top panel. Lift the control panel cover. Remove the two philips head screws located at the front edge of the bezel. Lift the front of the bezel up until the entire assembly comes away from the top. Without removing any wires, slip the control assembly through the hole so that when the top is removed, the control assembly will stay with the heater.
4.Remove the four philips head screws that fasten the vent grill to the top. Remove the vent grill.
5.Remove the top. There are two hex head screws at the upper corners of the raceway. And there are two philips head screws at the upper corners of the rear panel.
6.Disconnect the blower pressure switch rubber tubing from the blower assembly housing.
7.Disconnect the two white wires from the vent switch located just above the inlet/outlet header.
8.Remove the EMI shield (metal plate) covering the motor on the blower.
9.Disconnect the five blower wires from the terminal strip on the back of the raceway.
10.Remove the four hex head screws holding the blower to the flue collector. Lift the blower and the exhaust vent off of the flue collector.
11.Remove hex head screws holding the flue collector to the top of the combustion chamber. There are 10 screws on a model 400 and 6 screws on a model 250. Remove the flue collector and set it aside.
12.Remove the water pressure switch's copper siphon loop tube from the header by first loosening the brass nut at the pressure fitting. Then carefully pull the tube out of the fitting. There should be about two inches of tubing inside the header. Be careful not to create any kinks in the tubing when handling it.
13.Clip the wire tie that bundles the wire harnesses leading from the control panel. Disconnect the two black temperature sensor wires from the back of the control panel. Coil the wires and place them on top of the heat exchanger.
14.Disconnect the high limit switch black wires from the wire harness leading to the control panel. There are quick disconnects at the end of the wires.
15.Remove the inlet/outlet header side cover plate located under the inlet/outlet header. There are four philips head screws, one in each corner, holding it in place.
16.Slide the upper right side panel up and out of the corner posts and place it aside.
17.Remove the left side cover panel, held to the lower panel with two philips head screws at the corners.
18.Remove the flat return header side cover plate to expose the return header by removing the four philips head screws, one in each corner.
19.Slide the upper left side panel up and out of the corner posts and place it aside.
20.Remove the end baffles from the heat exchanger.
WARNING
The heat exchanger is heavy.
It may be necessary to have help lifting the heat exchanger to remove it and replace it on the combustion chamber.
21.Lift the heat exchanger assembly off of the combustion chamber and rotate it 180° so that the inlet/outlet header is on the left side of the heater.
22.Carefully place the heat exchanger assembly back on top of the combustion chamber. Be sure that the heat exchanger is level and that the finned tubes fit between the front and rear walls of the combustion chamber. Be sure that the definned section of the tubes, near the headers, fit into the slots cut in the top of the insulation on the side walls of the combustion chamber.
23.Reinstall the end baffles on the heat exchanger. Align the cut out portion of one of the baffles with the cut out section on the top of the front combustion chamber wall. Set the baffle so that the flange fits completely over the combustion chamber wall. Set the other baffle on the rear combustion chamber wall in the same manner.
Note: There is no cut out section on the rear combustion chamber wall.
24.Carefully bend the water pressure switch's copper siphon loop tube so that it reaches the inlet/outlet header now on the left side of the heater. Do not straighten out the coil behind the raceway and do not “kink” the tubing. Straightening the coil or kinking the tubing may result in poor heater operation. Insert the end of the tube into the fitting on the header. Tighten the nut onto the fitting one half turn past hand tight.
25.Route the wires that attach to the high limit switches along the copper siphon loop, back to the right side of the heater. Reconnect the wires to the wire harness.
