RBI LCD Series Installation & Operation Manual page 32

Page 32
Heat Exchanger Removal, Cleaning & Replacement -
See Figure 20
1. Close the shut off valves in the inlet and outlet
piping. On heating systems close the system fill
valve and relieve the system pressure from the
boiler by carefully lifting the relief valve or opening
the drain valve.
2. Drain the boiler/water heater and disconnect it from
the system piping.
3. Remove the inlet/outlet and return headers.
4. Remove the jacket front panels.
5. Loosen, 4 turns, but don't remove the 6 screws,
(3 on each side) holding the heat exchanger upper
rails in place, Figure 21.
6. Disconnect the gas piping at the ground joint unions.
Also disconnect the pressure sensing lines, pilot
tubing and ignition and sensing leads.
7. Remove the upper partition panel, 1050 through
2300 models.
8. Remove the 1/4 inch nuts and washers holding the
upper combustion chamber front panel in place and
carefully remove it.
9. Carefully slide the heat exchanger out of the unit.
Figure 20-Burner and Heat Exchanger Servicing
LCD INSTALLATION AND OPERATION INSTRUCTIONS
10. Remove the "V" baffle straps and "V" baffles.
11. Thoroughly inspect the heat exchanger for signs of
damage. If there is no damage, clean the heat
exchanger with water from a high-pressure hose.
Use a soft bristle brush if necessary.
CAUTION: Never clean the heat exchanger while it's
in the boiler/water heater or the combustion
chamber will be destroyed!
12. Sagging or distorted heat exchanger tubes are an
indication of low water flow through the system. A
leaking or otherwise damaged heat exchanger must
be replaced and the condition that caused the
damage resolved before the boiler/water heater is
returned to service.
13. If the heat exchanger isn't damaged rewire the heat
exchanger baffles in place and slide the heat
exchanger back into the unit.
14 Reinstall all of the other components in the reverse
order of their removal.