Takagi T-KJr2U-IN Installation Manual And Owner's Manual page 15

For the 110U Indoor (T-KJr2U-IN), 310U Indoor (T-K4U-IN) and 510U Indoor (T-D2U-IN) models
For details of the optional items, refer to the Installation manual for each Optional item.
Horizontal Installation Diagram
Backflow
Preventer*
Vertical Condensation Drain**
Horizontal Installation Diagram
(With direct-venting)
Vertical Condensation
Backflow
Drain**
Preventer*
See the picture below for detailed connection
instructions to Direct-Vent Conversion Kit.
*Backflow Preventer (Recommended for freezing weather conditions: 36 °F (2 °C) and below).
**Vertical Condensation Drain must be installed in accordance with local codes.
Horizontal Installation Diagram With
Direct-Vent Concentric Termination
Wall
Direct-vent
Concentric
Termination
-Venting Illustrations-
Wall
Sidewall Vent
Terminator
Backflow
Preventer*
Wall
Sidewall Vent
Terminator
15
Page
Installation Manual
Vertical Installation Diagram
Rain Cap
Roof Flashing
Roof
Vertical Condensation Drain**
Vertical Installation Diagram
(With direct-venting)
Rain Cap
Roof
Backflow
Preventer*
Vertical Condensation Drain**
Installation Diagram of Direct-Vent
Conversion Kit with water heater
Intake port of Direct-Vent
Conversion Kit
(For details see P.10)
The water heater
Plate of Direct-Vent Conversion Kit
Installation
Roof
Flashing
Fire stop