Dometic WH-9EXT Manuals

Manuals and User Guides for Dometic WH-9EXT. We have 1 Dometic WH-9EXT manual available for free PDF download: Service Manual

Dometic WH-9EXT Service Manual

Dometic WH-9EXT Service Manual (52 pages)

Brand: Dometic | Category: Water Heater | Size: 7.54 MB

Table of Contents

Table of Contents
2
2 Intended Use

4
3 Troubleshooting

5
4 General Information

8
- Tools and Materials
  8
- Terminology
  9
- Control Board (Standard and EXT)
  9
- Model Identification
  10
- Component Locations
  11
- E.C.o
  12
- Electrode
  12
- Gas Solenoid Valve
  12
- Sequence of Operations
  13
5 Wiring Diagrams

15
6 Diagnostic Procedures

20
- Component-Based Diagnostics
  20
- Heating Element
  24
- Orifice
  25
- P/T Relief Valve
  25
- Pilot Assembly
  25
- Pressure Switch
  25
- Relays
  26
- Tank
  26
- Thermal Cut-Off
  26
- Thermocouple (Gas Only - Pilot Model Only)
  26
- Thermostat (Cold-Weather)
  27
- Thermostat (Standard)
  27
- Error-Based Diagnostics
  28
- Wall Switch
  28
- Winter/Summer Setting Screw
  28
7 Installation Issues

29
- Power Issues
  29
- Gas Pressure Issue
  29
8 Service Procedures

29
9 Maintenance

48
- Cleaning the Mixing Valve Screen
  48
- Flushing the Tank
  49
10 Disposal

50
11 Replacement Parts

50

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