Takagi T‐KJr2‐IN Installation Manual And Owner's Manual page 13

(For the T‐KJr2‐IN, T‐K4‐IN, & T‐D2‐IN models)
This is a Category III appliance and must be vented accordingly. The vent system must be sealed air tight.
All seams and joints without gaskets must be sealed with high heat resistant silicone sealant or UL listed
aluminum adhesive tape having a minimum temperature rating of 350°F. For best results, a vent system
should be as short and straight as possible.
•
This water heater is a Category III appliance and must be vented accordingly with any 4" vent
approved for use with Category III or Special BH type gas vent.
•
Follow the vent pipe manufacturer's instructions when installing the vent pipe.
•
Do not common vent this appliance with any other vented appliance (Do not terminate vent
into a chimney. If the vent must go through the chimney, the vent must run all the way
through the chimney with Category III approved or Special BH vent pipe).
•
When the horizontal vent run exceeds 5 ft., support the vent run at 3 ft. intervals with
overhead hangars.
•
The maximum length of exhaust vent piping must not exceed 50 ft. (deducting 5 ft. for each
elbow used in the venting system). Do not use more than 5 elbows.
Diameter
4"
*For each elbow added, deduct 5 ft. from max. Vent length.
No. of Elbows
0
1
2
5
(For the T‐KJr2‐IN, T‐K4‐IN, & T‐D2‐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**
‐Exhaust venting‐
Max. No. of Elbow
5
Max. Vertical or Horizontal Length
50 ft.
45 ft.
40 ft.
25 ft.
‐Venting Illustrations‐
Wall
Sidewall Vent
Terminator
13
Max. Vertical & Horizontal (Total) Vent Length
Vertical Installation Diagram
Roof
Backflow Preventer *
│
Page
Installation
50 ft.
Rain Cap
Roof Flashing
Vertical Condensation
Drain**