Flue Installation (R98LSi, R98LSi-ASME)

Air Intake Assembly

1

2

The air intake system consists of a field supplied 4 inch diameter stainless steel, Schedule 40 PVC, ABS or CPVC pipe. A maximum 6 feet of semi-rigid flexible aluminum ducting can also be used. Foil wrapped dryer vent and cell core products are not authorized.

The air intake has a zero clearance to combustibles.

Air Intake Connection

3

4

1. Drill 2 small holes at the end of the air intake

pipe.

 

 

2.Slide the pipe over the air intake terminal.

3.Using a level, ensure the pipe is straight up and down.

4.With self tapping screws, attach the pipe to the air intake terminal.

5.Apply a bead of silicone around the pipe and air intake terminal, ensuring an air tight connection.

Exhaust Pipe Assembly

Refer to the manufacturer’s installation instructions for the specific exhaust vent system.

Venting Clearances to Combustibles

 

Enclosed

Unenclosed

Vent Size

 

 

Horizontal &

Horizontal &

 

Vertical

Vertical

4" (102 mm)

4" (102 mm)

1" (26 mm)

 

 

 

Horizontal Terminations

The air intake must be located in relation to the exhaust as shown below. The air intake must angle 1/4 inch per foot to the termination to prevent entry of rain.

6

Vent

8

Optional

Intake

Intake

The vent termination and air intake must be in the same pressure zone and face the same direction.

EXHAUST

COMBUSTION AIR /

INTAKE

SLOPE INTAKE AND EXHAUST

TOWARD OUTSIDE TERMINATION

MINIMUM 1/4" PER FOOT

 

 

 

 

 

 

 

 

 

 

 

 

32

VA Series Indoor LS Manual

 

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Rinnai R75LSI Flue Installation R98LSi, R98LSi-ASME, Air Intake Assembly, Exhaust Pipe Assembly, Horizontal Terminations

R50LSI, R94LSI, R75LSI, R98LSI-ASME, R98LSI specifications

The Rinnai R50LSI, R75LSI, R94LSI, R98LSI, and R98LSI-ASME are high-efficiency tankless water heaters designed for residential and commercial applications. Each model in this line-up boasts unique features and technologies that cater to varying hot water needs while emphasizing energy efficiency and reliability.

The R50LSI is the most compact option in the lineup, providing up to 5.1 gallons per minute (GPM) of hot water at a 35°F rise in temperature. It is an ideal choice for smaller households or apartments where space is a premium. It operates using a direct vent system, ensuring safe exhaust of combustion gases outside the home. The R75SLI, with a maximum output of 7.5 GPM, is suited for needs such as multiple showers running simultaneously, making it perfect for medium-sized homes.

Moving on to the R94LSI and R98LSI, these models provide even greater capacity and efficiency. The R94LSI offers an impressive 9.4 GPM flow rate, while the R98LSI reaches a peak of 9.8 GPM, supporting larger family requirements and ensuring hot water availability for multiple applications concurrently. Both models incorporate Rinnai’s advanced Circ-Logic technology, which allows users to set schedules for recirculating hot water, minimizing wait time and enhancing convenience.

For commercial applications, the R98LSI-ASME is a specialized model that includes the American Society of Mechanical Engineers (ASME) certification. This makes it suitable for larger facilities, such as restaurants, schools, and other institutions that demand a robust and efficient solution for comprehensive hot water needs.

All these models feature a user-friendly digital controller, enabling easy temperature adjustments and real-time monitoring. Moreover, their compact design means they can be installed in various locations, saving valuable space. The Rinnai tankless water heaters utilize a highly efficient condensing technology, resulting in a lower carbon footprint and reduced energy costs.

With a robust warranty program and the reliability that Rinnai is known for, the R50LSI, R75LSI, R94LSI, R98LSI, and R98LSI-ASME embody the pinnacle of water heating technology. These models not only provide the convenience of on-demand hot water but also contribute to energy conservation, making them an excellent choice for environmentally conscious consumers.