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Noritz NRC1111-OD Instructional Manual
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Noritz NRC1111-OD Instructional Manual

Noritz NRC1111-OD Instructional Manual

Replacement
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This instructional manual is only intended for use by a qualified service professional or authorized Noritz
Service Representative. Any unauthorized use of this manual may result in voiding the warranty.
Please contact Noritz Technical Support (866-766-7489) for additional support.
SKJ70RQ
Rev. 05/16
Heat Exchanger Replacement
NRC1111-OD, NRC1111-DV
NCC1991-OD, NCC1991-DV
NCC1992-DV
NRC111OD(GQ-C3257WX US), NRC111DV(GQ-C3257WX-FF US)
NCC199OD(GQ-C3257WZ US), NCC199DV(GQ-C3257WZ-FF US)
Noritz America Corporation
11160 Grace Avenue, Fountain Valley, CA 92708
Phone 866-766-7489 Fax 714-241-1196
Page 1

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Summary of Contents for Noritz NRC1111-OD

  • Page 1 NRC111OD(GQ-C3257WX US), NRC111DV(GQ-C3257WX-FF US) NCC199OD(GQ-C3257WZ US), NCC199DV(GQ-C3257WZ-FF US) This instructional manual is only intended for use by a qualified service professional or authorized Noritz Service Representative. Any unauthorized use of this manual may result in voiding the warranty. Please contact Noritz Technical Support (866-766-7489) for additional support.
  • Page 2 Heat Exchanger Replacement Procedure Procedure 1. Drain the unit as shown in follwing procedure 1. Drain the unit as shown in follwing procedure Drainage using the Remote Controller Manual Draining * RC-7651M * RC-9018M Drain Plugs Each drain plug might not be visible if insulation is installed around the piping.
  • Page 3 Heat Exchanger Replacement Procedure Procedure Diagram 2. Remove Front Cover (1)Disconnect electrical power to the unit (2)Turn off gas and water (3) Remove 4 screws Ex.) OD model 3. Remove Lightning Protection Case No.1 (1) Remove 2 screws that hold the Lightning Protection Plate (Whichever the unit is in case No.1, 2, 3) (2) Remove additional ground wires (3) Let Lightning Protection hang outside of the unit...
  • Page 4 Heat Exchanger Replacement Procedure Procedure Diagram 4. Unplug all wires that attach to the wiring harness and the body of the unit (1) Loosen the wire anchor from left side of Case, unplug Freeze Prevention Heaters (2), remove Cover - Drain (2) Loosen the wire anchor from Condensate Container, unplug Freeze Prevention Heaters (2), Water Servo - Main, Water Level Electrode,...
  • Page 5 Heat Exchanger Replacement Procedure Procedure Diagram (5) Unplug wiring for Igniter DV model only ; Unplug Thermistor - Exhaust Thermistor-Exhaust (6) Loosen the wire anchor from right side of Case, unplug Freeze Prevention Heater, High Limit Switch, Thermal Fuse (2) and Themistor - Scale Detection* *The following models have "Thermistor - Scale Detection"...
  • Page 6 Heat Exchanger Replacement Procedure Procedure Diagram 5. DV model only ; Remove Exhaust Flue from top of the unit (1) Disconnect the venting from the unit (2) Remove 4 screws and pull Exhaust Flue off of the unit and set aside 6.
  • Page 7 Heat Exchanger Replacement Procedure Procedure Diagram 8. Remove Pipe - Flow Sensor to Stainless Steel Heat Exchanger (SS HE) and Water Flow Sensor (1) Remove "C" Clamp on top of the pipe going into SS HE (2) Remove "C" Clamp on bottom of the pipe going into Water Flow Sensor Pipe - Flow Sensor to SS HE (3) Remove the pipe...
  • Page 8 Heat Exchanger Replacement Procedure Procedure Diagram 10. Disconnet a pipe from Water Servo - Main Water Servo - Main (1) Remove "C" Clamp, disconnect a pipe from Water Servo - Main Water Servo - Bypass 11. Remove the assembly from Case (1) Remove 2 set screws on the bottom of Burner (2) Remove 2 set screws near the top of Case (Surpport bottom of the assembly)
  • Page 9 Heat Exchanger Replacement Procedure Procedure Diagram 12. Remove Pipe - Heat Exchanger SS to CU NRC1111-OD/DV NCC1991-OD/DV NCC1992-DV (1) Remove "C" Clamp on top of the pipe going into SS HE Pipe - Heat Exchanger SS to CU (2) Remove "C" Clamp on the pipe going into CU HE NRC111OD/DV(GQ-C3257WX＊＊)
  • Page 10 (1) Front side: Freeze Prevention Heater (2) Right side: High Limit Switch and Freeze Prevention (2)Right side Heater (Secure to put Freeze Prevention Heater on same position) NRC1111-OD/DV NCC1991-OD/DV NCC1992-DV (3) Left side: Freeze Prevention Heater (Secure to put Freeze Prevention Heater on...
  • Page 11 4 sides of CU HE, see 4 views of CU HE to make sure Thermal Fuse is routed correctly Clamp The end of Insulation tube(Black) and the Inlet pipe of CU HE are lined up Left side Keep Thermal Fuse straight NRC1111-OD/DV Back side NCC1991-OD/DV Clamp NCC1992-DV NRC111OD/DV(GQ-C3257WX＊＊) Back side NCC199OD/DV(GQ-C3257WZ＊＊)
  • Page 12 Heat Exchanger Replacement Procedure Procedure Diagram 17. Replase Gaskets Gasket (1) Replace new Gasket on CU HE Exhaust Box (2) Remove old Burner Gasket and replace with new one Gasket 18. Place new O - Rings on new CU HE (1) Inlet to CU HE (2) Outlet from CU HE Page 12...
  • Page 13 Heat Exchanger Replacement Procedure Procedure Diagram 19. Replace Burner, CU HE, and SS HE (1) Attach 7 screws that located on the back side of SS HE to hold SS HE to CU HE (2) Attach 2 screws on the bracket between SS HE and CU HE (3) Connect Pipe - Heat Exchanger SS to CU (4) Attach "C"...
  • Page 14 Heat Exchanger Replacement Procedure Procedure Diagram 20. Replace the assembly back inside the case (1) Secure 2 set screws near the top of Case (2) Secure 2 set screws on the bottom of Burner Ex.) DV model 21. DV model only ; Replace Exhaust Flue on top of the unit (1) Attach Exhaust Flue to the unit and secure 4 screws (2) Reconnect the venting to the unit 22.
  • Page 15 Heat Exchanger Replacement Procedure Procedure Diagram 23. Reinstall Condensate Container (1) Locate the 3 key holes inside of Case (2) Locate the 3 knobs on Condensate Container (3) Line up the knobs with the key holes and pull down to secure Condensate Container (4) Attach with a screw the mounting plate to secure Condensate Container to bracket on Case (5) Attach 3 hose with Hose Clamps, you will need...
  • Page 16 Heat Exchanger Replacement Procedure Procedure Diagram 24. Reconnect Pipe - Water Flow Sensor to SS HE, and attach Water Flow Sensor (1) Attach Water Flow Sensor with "C" Clamp (2) Insert the pipe into Water Flow Sensor and SS HE (3) Attach "C"...
  • Page 17 Heat Exchanger Replacement Procedure Procedure Diagram 26. Replace Manifold Plate (1) Secure Manifold Plate to Burner with 4 big silber screws (2) Secure gas pipe of Manifold Plate to gas inlet fitting with "C" Clamp 27. Reconnect all wires that attach to the wiring harness and the body of the unit Thermistor - Exhaust (1) Plug wiring for Igniter...
  • Page 18 Heat Exchanger Replacement Procedure Procedure Diagram (4) Plug Freeze Prevention Heaters (2), Wiring for Fan Motor, Water Flow Sensor, Thermistor - Cold Water, and Wiring for Manifold Plate And then tie wires with Cable Tie Cable Tie (5) Plug Freeze Prevention Heaters (3), Water Servo - Bypass, and Thermistor - Hot water And then tie wires with Cable Tie (6) Plug Freeze Prevention Heaters (2),...
  • Page 19 Heat Exchanger Replacement Procedure Procedure Diagram 28. Replace Lightning Protection Case No.1 (1) Attach Lightning Protection Plate with 2 screws (2) Attach additional ground wires Case No.2 Case No.3 NRC111OD/DV(GQ-C3257WX＊＊) and NCC199OD/DV(GQ-C3257WZ ＊＊) have "Blue connector" for Scale Flushing NOTE ; Don't connect this blue connector when replacing Heat Exchanger Disconnected Page 19...
  • Page 20 Heat Exchanger Replacement Procedure Procedure Diagram 29. Check for water leak (1) Secure 4 drain valves (2) Turn on water inlet valve slowly (check for leaks around "C" Clamps) (3) If you get leaks, close water inlet valve Re-secure "C" Clamps of leaking points 30.

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Nrc1111-dvNcc1991-odNcc1991-dvNcc1992-dvNrc111odGq-c3257wx us ... Show all