©Navien America Inc. 2010CH series service Manual
1
Version 1.0
Contents
REVISIONS 5
NAVIEN WARRANTY 6
HANDLING OF THIS MANUAL 8
ABBREVIATION AND DEFINITION 9
1. SAFETY CONSIDERATIONS 10
1.1. SAFETY DEFINITIONS 10
1.2. LIST OF SAFETY SYMBOLS IN THIS MANUAL 10
1.3. SYMBOLS USED IN THE INSTRUCTIONS 10
1.4. SAFETY PRECAUTIONS 11
2. PRODUCT INFORMATION 16
2.1. PRODUCT INFORMATION 16
2.2. LAYOUT AND KEY COMPONENTS 17
3. TECHNICAL DATA 18
3.1. GENERAL SPECIFICATIONS 18
3.2. DIMENSIONS 19
4. SYSTEM DETAILS 20
4.1. SCHEMATIC AND WATER FLOW DIAGRAM 20
4.1.1. Space Heating Mode 20
4.1.2. Domestic Hot Water Mode 21
4.2. OPERATION FLOW CHART 22
4.3. DIP SWITCH SETTINGS 26
4.4. WIRING DIAGRAM 29
4.5. ELECTRICAL DIAGNOSTIC POINTS 30
4.6. KEY COMPONENTS DESCRIPTION 33
4.6.1. PCB 33
4.6.2. Thermal Fuse 34
4.6.3. Transformer 35
4.6.4. High Limit Switch or Exhaust Limit Switch 36
4.6.5. Thermistor 37
4.6.6. Fan motor 38
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