Takagi T-H3M-IN/OS - Manual (Page 16)

16
Page
Installation
Installation Manual
Vent connections for two-pipe
4" stainless
steel vent
straight pipe
Exhaust vent
collar (Female)
Intake vent collar
(Female)
4" stainless
steel vent
straight pipe
Exhaust vent
collar (Female)
4" stainless
steel vent
straight pipe
Intake vent
collar
(Female)
4" elbow
with bird
screen
1. Connect a 4" stainless steel vent
straight pipes directly on the
exhaust vent collar of the
water heater
2. Connect a 4" elbow directly
on the intake vent collar of the
water heater
1. Connect 4" stainless steel vent
straight pipes directly on the
exhaust/intake vent collar of the
water heater
For details of the optional items, refer to the Installation manual for each Optional item
-Exhaust vent (Stainless steel vent)-
This is a Category IV appliance and must be vented accordingly The vent system must be sealed airtight
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 160 °F For best results, a vent system
should be as short and straight as possible
• The Indoor model is a Category IV appliance and must be vented accordingly with any 4 inch vent
approved for use with Category III/IV or Special BH type gas vent
• The manufacturer recommends the NovaVent (Z-Vent) line However, the following are also UL
listed manufacturers: ProTech Systems Inc (FasNSeal), Metal-Fab Inc, and Heat-Fab Inc (Saf-T
Vent)
• Follow the vent pipe manufacturer’s instructions when installing the vent pipe.
• The maximum length of exhaust vent piping must not exceed 100 ft (305 m) (deducting 5 ft (15
m) for each elbow used in the venting system) Do not use more than 5 elbows
• When the horizontal vent run exceeds 5 ft (15 m), support the vent run at 3 ft (09 m) intervals
with overhead hangers
Diameter Max. No. of Elbows Max. Vertical and Horizontal (Total) Vent Length
4 in (102 mm) 5 100 ft (305 m )
*For each elbow added, deduct 5 ft. (1.5 m) from max. vent length.
No. of Elbows Max. Vertical or Horizontal Vent Length
0 100 ft (305 m)
1 95 ft (290 m)
2 90 ft (274 m)
3 85 ft (259 m)
4 80 ft (244 m)
5 75 ft (229 m)
Excludes vent terminators, termination elbows, or rain caps
Vent connections for single pipe