Rinnai Advance Specifications download pdf (Page 17)

Gas: 1/2" MNPT*

4" B-Vent

Hot Water: 3/4" MNPT

PRV: 3/4" FNPT

Standard Hookups Make

Installation Quick and Easy.

The Rinnai RH180 Hybrid Tank-Tankless Water Heater is a unique

combination blending the beneﬁts of advanced technology and

simple supply; it pairs an innovative, on-demand tankless system

with an ample 40-gallon storage tank. By design, the system has a

large capacity of hot water as well as technology to help maintain

and quickly replenish the hot water supply.

Here are the basics:

1. When a hot water ﬁxture (shower, faucet, etc.) is turned on,

heated water exits the system from the top of the tank. While

hot water exits the top of the tank, cold water enters the system

and is directed toward the bottom of the tank.

2. Automatically sensing a change in temperature, the system

activates a pump that draws cooler water located at the

bottom of the tank up and through the heating components

of the tankless unit.

3. The heated water exits the tankless unit and is then directed

toward the top of the tank.

4. While the ﬁxture is on and cold water continues to be directed

to the bottom of the tank, the tankless technology continually

replenishes the system with hot water.

5. When the hot water ﬁxture is turned off, cold water stops

entering the tank, but the tankless unit continues replenishing

hot water until the selected set temperature is satisﬁed.

HOW IT WORKS.

* As with all gas appliance applications, installers should check and abide by local gas-pipe

size and national fuel gas codes.

The Rinnai RH180 Hybrid Tank-Tankless Water Heater DELIVERS MORE OF WHAT YOU WANT.

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Rinnai Advance Specifications Page 17