ICP N9MP1 Service Manual

Also see for C9MPD: User's information manual User's information manual Installation instructions

ICP N9MP1 Service Manual Manual pdf 46 page image

Single Stage Multi Position FurnaceService Manual44440 08 2001 0230. HEAT EXCHANGER REMOVAL/REPLACEMENTìExplodedî Parts View -- Typical Four Position FurnacesFigure 5125--23--43aSecondary Heat Exchanger1. Turn îOFFî electrical power and gas supply to furnace.2. Disconnect vent pipe to furnace at flexible coupling.3. Remove combustion blower.4. Remove machine screws securing transition assemblyto furnace front partition.5. Remove the collector box.6. Loosen the four(4) screws on the manifold or as an alter-native the four(4) screws on the manifold bracket.7. Move the manifold bracket and valve up enough so thesecondary heat exchanger will clear the flange on thebaffle.8. Remove machine screws securing secondary heat ex-changer inlet flange to lower partition.9. Remove screws around perimeter of lower partition.10. Removed screws securing secondary heat exchangerto the supports.11. Coil can now be removed from furnace.12. Reverse procedure to reinstall, making sure that anygaskets that have been torn during disassembly arereplaced with new ones.Primary Heat Exchanger1. Turn îOFFî electrical power and gas supply to furnace.2. Disconnect vent pipe to furnace at flexible coupling.3. Disconnect combustion air inlet pipe at top panel (ifneeded).4. Remove furnace top panel.5. Disconnect gas piping to furnace at gas valve. Note: Be-fore performing next step, insure that the wiring dia-gram is available and readable, or tag all wires first.6. Disconnect tubing and wiring to pressure switch, limitswitches, and gas valve.7. Remove screws securing burner box to front partition.8. Remove combustion blower.9. Remove machine screws securing transition assemblyto furnace partition.10. Remove the collector box.11. Remove machine screws securing secondary heat ex-changer inlet flange to lower partition.12. Remove screws around perimeter of both the upperand lower partitions (leaving the screws across thecenter of the two panels in place).13. Primary Heat Exchanger can now be removed withboth upper and lower partitions attached.14. Reverse procedure to reinstall, making sure that anygaskets that have been torn during disassembly arereplaced with new ones.15. After reassembly, turn the gas supply on, and check forleaks. All leaks must be repaired immediately.16. Perform an operational check of the furnace.