Introduction
©Aqua-Hot®
400D Installation Manual
Rev 220504
p. 1
Contents
Caution Notes ...............................................................................1
Introduction ..................................................................................2
System Features ..........................................................................4
Component Cut-Aways .................................................................5
Installing the Aqua-Hot ................................................................7
Support & Clearances ..................................................................8
Installation of the Expansion Tank ..............................................9
Exhaust System ..........................................................................10
Installing the Heat Exchangers ................................................ 13
Mounting the Heat Exchangers .................................................15
Wiring the Heat Exchangers ......................................................16
Plumbing the Heating Loop .......................................................17
Heat Exchangers Layout ............................................................19
Diesel Fuel System .................................................................... 20
Domestic Water System Requirements ................................... 23
Plumbing the Domestic Water System .....................................24
Thermostats .............................................................................. 25
Interior Switch Panel ................................................................. 26
Wiring the Aqua-Hot .................................................................. 28
Aqua-Hot Reporter......................................................................31
Reporter Manual Mode ............................................................. 35
Connecting the 400D to 12V DC Power .................................. 36
Connecting the 400D to AC Power ............................................37
Filling the Aqua-Hot ................................................................... 38
Purging the Interior Heating Loop ............................................ 39
First Operation ........................................................................... 40
Winterizing ..................................................................................41
Flow Diagram ............................................................................. 42
Wire Sizing ................................................................................. 43
Appendix A: System Schematics .............................................. 44
Appendix B: Antifreeze .............................................................. 50
Appendix C: Parts & Accessories ............................................. 53
Warranty .................................................................................... 59
Caution Notes
As you read this information, take particular note of the NOTICE,
CAUTION, WARNING, and DANGER symbols when they appear.
This information is important for safe and efficient use of the
Aqua-Hot system.
NOTICE
signals a situation where potential damage to the
Aqua-Hot could occur.
CAUTION
signals a situation where potential harm or risk of
minor or moderate injury could occur if you do not follow
instructions.
WARNING
signals a hazardous situation where potential harm,
risk of serious injury, or death could result if instructions are not
followed.
DANGER
signals a situation where immediate risk of serious
injury or death will result if instructions are not followed.
NOTE:
This manual will also use notes sections similar to
this one to draw attention to features and practices which
must be observed.