Section 3, Installing the Exhaust System
What NOT to Do
Don’t mount the exhaust pipe inside the heater compartment.
Don’t use more than 10’ of exhaust pipe including no more than
180° of total bends.
Don’t use mufflers with any flow restrictions.
Don’t over tighten exhaust clamps or you may crush The
WaterHeater™ by ITR’s exhaust spout.
3.3 Procedure
Figure 3-1 shows a standard setup for the down exhaust. To
install the exhaust system:
1
Leave suitable air spacing to protect combustible
materials; use an exhaust collar and metal shields where
required.
2
Securely seal the exhaust piping to The WaterHeater™ by
ITR fitting using an approved exhaust clamp.
3
Connect the exhaust piping in series with the muffler,
using heavy-duty exhaust clamps. If you use vibration
isolation mounts they must be high temperature.
4
Connect the air-intake tubing (2” I.D.) to the air-intake
fitting on top of the heater, and to an outside air-intake
fitting or dual thru hull (outside air only). Ensure the run
of tubing is as short as possible to facilitate air flow.
5
Secure both ends of the air-intake tubing with properly
sized hose clamps to prevent air leaks.
6
Make sure the air-intake and exhaust hoses have no leaks
and are not touching each other.
7
On a yacht, make sure the thru hull is at least 30” above
the waterline and the exhaust must be goose-necked (see
Figure 3.2).
3-4
The WaterHeater™ by ITR
