Navien CH-180 Service manual - page 5
©Navien America Inc. 2010
CH series service Manual
3
Version 1.0
5.22. 28ERROR
100
5.23. 30ERROR
102
5.24. 35ERROR
103
5.25. 36ERROR
105
5.26. 39ERROR
106
5.27. 40ERROR
107
5.28. TROUBLESHOOTING GUIDE BY SYMPTOM
108
5.28.1. Noise
108
5.28.2. Hot water
109
5.28.3. Space Heating
110
6. INSPECTION
112
6.1. PREPARING THE BOILER FOR INSPECTION
112
6.2. MEASURING GAS PRESSURE SETTING
113
6.2.1. How to Check Inlet Gas Pressure
113
6.2.2. Adjusting the Gas-Air Ratio
114
7. MAINTENANCE
116
7.1. DRAINING THE BOILER
116
7.2. CLEANING THE INTAKE AIR FILTER
117
7.3. FLUSHING THE HEAT EXCHANGER
117
8. REPLACEMENT OF PARTS
118
8.1. REPLACEMENT
PROCEDURE
118
8.2. COMPONENTS REPLACEMENT INSTRUCTIONS
119
8.2.1. PCB
119
8.2.2. Fuse
120
8.2.3. Transformer
121
8.2.4. Fan Motor(Combustion Air )
122
8.2.5. Flame Rod
123
8.2.6. Ignition Transformer
124
8.2.7. APS
125
8.2.8. Manifold
126
8.2.9. Main Gas Valve
127
8.2.10. GPS
129
8.2.11. Condensation Trap
130
8.2.12. Flow Sensor
131
8.2.13. Circulation Pump
132
8.2.14. 3-way Valve
133
8.2.15. Water Pressure Sensor
134