User’s Guide ----------------------------3
Important Safety Information -------3
General Parts ---------------------------8
Main Unit --------------------------------8
Remote Controller ------------------10
Initial Operation ----------------------11
Setting and Using the water heater-12
Freeze protection --------------------13
Regular Maintenance ---------------14
Troubleshooting ----------------------16
Specifications -------------------------21
Isometric -------------------------------22
Installation Manual ------------------32
1. Included Accessories -----------33
2. Optional Accessories -----------33
3. Before Installation ---------------34
4. Choosing Installation ------------35
5. Installation Clearances ----------37
6. Unit Installation -------------------38
7. Venting ------------------------------39
8. Gas supply and gas piping ----47
9. Water Piping ----------------------47
10. Application Diagrams ----------50
11. Electrical Wiring -----------------51
12. Condensate Drain --------------53
13. Maintenance ---------------------54
14. Trial Operation ------------------55
15. Dimensions ----------------------56
Servicing Manual ---------------------61
1. Servicing schedule ---------------61
2. Water heater front case removal
& Replacement of components -62
3. Draining the water heater ------63
4. Cleaning the combustion chamber -63
5. Burner -------------------------------64
6. Spark plug & Flames sensing rod -64
7. Igintor --------------------------------65
8. Thermostat -------------------------65
9. Flow Rate Control Valve --------66
10. Bypass Control Valve ----------66
11. Fan ---------------------------------67
12. Overheat thermostat -----------67
13. Latent Heat Exchanger --------68
14. Sensible Heat Exchanger -----68
Measurement -------------------------69
1. Inlet Gas Pressure ---------------69
2. Manifolder Gas Pressure -------69
16. Multi Remote Controllers -----60