- 3 -
Table of Contents
1. General Outline of Appliance
1-1 Specifications .............................................................................................................................. 3
1-2 Performance ................................................................................................................................ 4
1-3 General Construction (Parts Names) .......................................................................................... 5
1-4 Main Component Structures ....................................................................................................... 6
1-5 Main Safety Devices ................................................................................................................... 8
2. Installation and Related Work
2-1 Installation Instructions ................................................................................................................ 9
2-2 Dimensions ................................................................................................................................. 13
2-3 Gas Piping ................................................................................................................................... 14
2-4 Water Piping ................................................................................................................................ 14
2-5 Electrical Connection .................................................................................................................. 15
2-6 Wiring Remote Controller ............................................................................................................ 16
2-7 Testing Operation ........................................................................................................................ 17
2-8 Cascade Installation (Only For Model 26) ................................................................................... 18
3. Service and Maintenance
3-1 Operation Principles .................................................................................................................... 19
3-2 Schematic Diagram ..................................................................................................................... 21
3-3 Flow Charts ................................................................................................................................. 22
3-4 Fault Findings and Error Code .................................................................................................... 23
3-5 Wiring Diagram ........................................................................................................................... 26
3-6 Cascade Flow Charts .................................................................................................................. 27
3-7 Gas Setting Procedure ................................................................................................................ 28
3-8 Combustion Specification, Various Combination Setting ............................................................ 29
3-9 Disassembling/Assembling Parts ................................................................................................ 33
3-10 Exploded View ............................................................................................................................ 40
3-11 Parts List ..................................................................................................................................... 41
