Install Instructions
Table Of Contents
- Table of contents
- 1 Key to symbols and safety instructions
- 1.1 Key to symbols
- 1.2 Safety instructions
- 2 FCC rules
- 3 Appliance details
- 4 Installation instructions
- 4.1 Specialized tools
- 4.2 Introduction
- 4.3 Venting
- 4.3.1 Vent material
- 4.3.2 Vent specifications
- Venting specifications
- Condensate drain requirements
- Minimum combustion air and exhaust pipe length
- Maximum combustion air and exhaust pipe length
- Use of elbows
- Calculation example for 3" venting:
- Calculation example for 4" venting:
- Required direct vent terminal clearances (twin pipe / concentric penetration)
- Required other than direct vent terminal clearances (single pipe penetration)
- 4.3.3 Vent configuration examples
- 4.3.4 Vent connections
- 4.3.5 Connecting the condensate water drain
- 4.3.6 Freeze prevention
- 4.3.7 Fan speed adjustment
- 4.4 Combustion air requirements
- 4.5 Proper location for installing your heater
- 4.6 Heater placement and clearances
- 4.7 Mounting installation
- 4.8 Gas piping & connections
- 4.9 Water connections
- 4.10 Water quality
- 4.11 Filling the condensate trap
- 4.12 Domestic hot water recirculation
- 4.13 Space heating applications
- 4.14 Measuring gas pressure
- 5 Electrical connections
- 6 Operation instructions
- 7 Maintenance and service
- 8 Troubleshooting
- 9 Problem solving
- 10 Electrical diagram
- 11 Sensor resistance charts
- 12 Functional scheme
- 13 Interior components diagram and parts list
- 14 Protecting the environment
- 15 Installer Checklist to be completed by installer upon installation
48 | Electrical diagram
C 1210 ES/ESC6 720 644 887 (2017/05)
10 Electrical diagram
Fig. 71 Electrical scheme
[1] Inlet water temperature sensor
[2] Outlet water temperature sensor
[3] Backflow temperature sensor
[4] Cascading output connection
[5] Cascading input connection
[6] Ionization sensor
[7] Water flow sensor
[8] Flue gas limiter
[9] Heat exchanger overheat sensor (ECO)
[10] Gas valve
[11] Exhaust temperature sensor
[12] Water valve
[13] Primary fan
[14] ON/OFF switch
[15] Secondary fan
[16] Power supply cord
[17] Power connection
[18] Ignition electrodes
[19] Ground post
[20] Antifreeze kit connection
[21] Fuse
[22] Fuse