Section 3, Installing the Exhaust System
•
In a coach, the typical mounting location for the exhaust
outlet is under the floor of the heater compartment (see
Figure 3-1), or on the other side of the coach, directly
across from the heater unit. Keep in mind you cannot
exceed 12’ of exhaust piping, including bends.
•
Position the outlet of the exhaust pipe so that the exhaust
exits off the side of the coach, not towards the front, back,
directly underneath the coach, or under an openable
window, vent or slide-out.
In a yacht installation, the following is recommended for the
exhaust outlet location:
•
Make sure that the thru hull is at least 30” above the water
line with a goose neck rise on the exhaust to help eliminate
water from getting to The WaterHeater™ by ITR through
the exhaust. If the dual exhaust air-intake thru hull is
used, ensure that the air-intake is placed between
10 o’clock and 2 o’clock and also goose-necked to avoid
water ingestion, see Figure 3-2.
•
There needs to be a 1/8" air gap around the exhaust thru
hull. The standard thru hull is 3" in diameter. The hole for
the fitting should be 3-1/4". Make sure that the holes for
the mounting screws have enough material left to properly
bite. The fitting must be centered in the hole.
Recommendation for Installation
The following applies to both a coach and yacht:
•
You may use sweep bends but each 90° bend is equivalent
to one foot of exhaust piping. For example, if you use two
90° bends you must deduct one foot per bend from the
maximum allowed 12’ straight exhaust pipe length.
Therefore you will be restricted to 10’ of straight exhaust
piping plus the two bends. Do not exceed these
recommendations.
•
Combustion air must be drawn from outside the coach or
yacht.
•
Use an ITR-manufactured muffler; no other muffler is
acceptable.
•
Exhaust outlet is on the top or bottom (model dependant)
of The WaterHeater™ by ITR, towards the back.
3-2
The WaterHeater™ by ITR
