Temperature Controller Settings

This water heater will attempt to provide hot water at the temperature setting even when the water flow is varied or when more than 1 tap is in use. The water heater can deliver water at only one temperature setting at a time. The available temperatures for a given model are provided below.

Model					Temperature Settings Available (ºF)
V53i	98	100	102	104	106	108	110	115	120	125	130	135	140	150	160
V53e														*	*
Temp in Celsius ºC	37	38	39	40	41	42	43	46	49	52	54	57	60	66	71

*MCC-91 Temperature Controller

These settings require the MCC-91 controller. When the MCC-91 controller is connected, these higher temperatures are available on all controller models in the system.

Use of an MCC-91 controller in a residential dwelling will reduce the warranty coverage to that of a commercial warranty application which is no coverage for these models (except when an MCC-91 is used with a Rinnai Hydronic Air Handler). See the Warranty Information for more information on the warranty.

The MCC-91 controller is intended for commercial and hydronic applications only. If an MCC-91 controller is used in a residential dwelling for a hydronics application, a mixing valve must also be installed to limit the potable hot water temperature to a safe temperature. Water temperatures over 125º F (52º C) can cause severe burns or scalding. Refer to the Danger Alert on water temperatures. Rinnai shall not, in any event, be liable for damages resulting from such misuse or misapplication.

Suggested temperatures are

•	Kitchen	120	ºF (49º C)
•	Shower	98 - 110 ºF (37 - 43 ºC)
•	Bath Fill	102	- 110 ºF (39 - 43 ºC)

These temperatures are suggestions only.

A temperature lower than 98 ºF (37 ºC) can be obtained at the tap by mixing with cold water.

To change the temperature scale from Celsius to Fahrenheit or vice versa, press and hold the “On/Off” button for 5 seconds while the water heater is OFF.

Temperature Options Without a Temperature Controller

The default temperature setting for this appliance installed without a temperature controller is 120º F

120º F (49º C)

140º F (60º C)

(49º C). If desired the temperature setting can be changed to 140º F (60º C) by adjustment of a switch.

Set switch 5 to ON to obtain 140º F water temperature setting.

Set switch 5 to OFF (default) to obtain 120º F water temperature setting.

If a temperature controller is installed then switch 5 has no effect on temperature settings.

Switch No.

F 2

Switch No.

F 2

4 5 6 7 8

V53i & V53e Operation and Installation Manual

V53I, V53E specifications

When it comes to reliable and efficient tankless water heaters, Rinnai stands out with its exceptional models, the V53I and V53E. These units are designed to provide a continuous supply of hot water, making them ideal for a variety of applications, from residential homes to small commercial settings.

The Rinnai V53I is an indoor model that boasts advanced technology and a compact design. Its main feature is the ability to deliver up to 5.3 gallons of hot water per minute, depending on the inlet water temperature, which ensures that households can enjoy multiple hot water outlets simultaneously without the fear of running out. The unit employs advanced energy efficiency standards, which can lead to increased savings on energy bills. Additionally, it comes equipped with the Rinnai Circ-Logic technology, enabling users to set recirculation patterns that ensure hot water is readily available when needed.

On the other hand, the Rinnai V53E is engineered for outdoor installation, with weatherproof capabilities that make it resilient against the elements. Just like the V53I, it produces up to 5.3 gallons per minute, ensuring ample hot water supply. Both models are equipped with a patented heat exchanger system, designed for optimal performance and performance longevity. This means that users can rely on consistent hot water production over the lifetime of the unit.

One of the standout characteristics of these models is their compact design, making them easy to install even in tight spaces. Rinnai’s tankless technology eliminates the need for bulky storage tanks, allowing for more functional residential and commercial space. The durability and reliability of both models are further reinforced by a commercial-grade heat exchanger that can withstand high-demand situations.

From a safety perspective, both the V53I and V53E include multiple safety features, such as freeze protection and a range of venting options, providing peace of mind to users. Rinnai also emphasizes sustainability, with their units promoting reduced energy consumption and emissions compared to traditional water heating systems.

In summary, the Rinnai V53I and V53E models offer advanced technology, efficient performance, and user-friendly characteristics. Whether indoors or outdoors, these tankless water heaters are designed to meet the demands of modern living while contributing to energy savings and environmental sustainability. With Rinnai’s reputation for quality and reliability, homeowners and business owners alike can trust these models to deliver uninterrupted hot water, season after season.

Rinnai V53I Temperature Controller Settings, Temperature Options Without a Temperature Controller

Models: V53I V53E