8Boiler controls

Installation & Servicing Instructions Rinnai E-Series

Example

Example

i NOTICE

The boiler is provided with a fully automatic microprocessor control, called CMS Control Management System. This control simplifies operation by undertaking all major control functions. Initially when power to the unit is switched on it will remain on standby. There is no indication LED on, until one of the program buttons is pressed. The control panel display will show the relevant state. When the installation is empty the display will show FILL.

The various parameters can be called up in two ways:

The Good-state or standard read out

The first way shows a simple display read out.

The boiler in operation will always show 'Good'. When a message is necessary this will be shown instead of Good.

Technical read out

The second way is a technical read out. In normal situations the following will be shown:

on the left the status in which the boiler is active;

on the right the supply temperature in °F;

Alternately indicated by:

the water pressure in the installation in PSI.

When a message (error or blocking code) is necessary this will be shown instead of the technical read out.

To switch over from the Good-state to the Technical read out (and vice versa): - Press the STEP-button for 5 seconds.

When the system has been filled the automatic de-aeration program starts, when a program has been selected, by pressing the button for Central Heating, DHW or pump

program (, of ). The program takes 17 minutes and stops automatically. After this the unit will function normally. (See also 'Filling and de-aerate the boiler and installation, chapter 9).

On a call for heating or hot water the control system will select the required water control temperature. This water temperature is called the T-set value. On a call for central heating the boiler ignites first at low input. The input is then changed slowly to match the load required. The boiler operates in this way to avoid excessive water noises and temperature overshoot. On a call for domestic hot water supply the T-set value of central heating return water temperature is monitored. Depending on the amount of domestic water which is withdrawn from the DHW fascility, the central heating return water temperature, from which the input is adjusted, will vary.

Operation indication

(in the first display position by technical read out)

0No heat demand

1

Fan pre/post purge

2Ignition phase

3

Burner active on central heating

4

Burner active on DHW

5

Fan check

6Burner off when room thermostat is demanding

7

Pump overrun phase for central heating

 

Pump overrun phase for hot water

8

 

Burner off because of to high flow temperature

9

 

Automatic de-aeration program

A

40

Page 40
Image 40
Rinnai E110CP, E75CN, E110CN Boiler controls, Good-state or standard read out, Technical read out, Operation indication

E75CP, E110CN, E75CN, E110CP specifications

Rinnai is a leading name in the heating industry, recognized for producing highly efficient and reliable tankless water heaters. Among their popular models are the Rinnai E75CN, E75CP, E110CP, and E110CN, each designed to cater to various household needs and preferences.

The Rinnai E75CN and E75CP are both remarkable for their compact size and impressive heating capabilities. The E75CN is a natural gas model, while the E75CP runs on propane. These units are designed to deliver a maximum flow rate of up to 7.5 gallons per minute, ensuring that multiple fixtures can be used simultaneously without a dip in performance.

Both models incorporate advanced temperature control technology, allowing users to set their desired water temperature with precision. The units feature a durable heat exchanger, constructed from high-grade stainless steel, which not only promotes longevity but also helps in preventing corrosion. Additionally, they come with built-in safety features, such as freeze protection and an overheat cut-off system, ensuring safe operation in varying conditions.

Moving on to the Rinnai E110CP and E110CN, these tankless water heaters are designed for larger households with higher hot water demands. The E110CP operates on propane, while the E110CN utilizes natural gas. These units deliver a maximum flow rate of up to 11 gallons per minute, making them ideal for simultaneous use in multiple bathrooms, kitchens, and laundry rooms.

The E110 models showcase Rinnai's Smart Technology, which optimizes energy consumption by adjusting the heating output based on the demand. This not only maximizes efficiency but also significantly reduces energy costs. They are equipped with digital controls and diagnostics, providing users with real-time information and the ability to troubleshoot easily if any issues arise.

In terms of installation, all four models are designed for versatility. They can be installed indoors or outdoors, giving homeowners flexibility based on their space and preference. With their compact design, these units require less space compared to traditional tank heaters, making them a suitable choice for modern homes.

Overall, Rinnai's E75CN, E75CP, E110PC, and E110CN models represent cutting-edge technology in tankless water heating. Their efficiency, safety features, and advanced technology make them an excellent choice for homeowners looking to upgrade their hot water systems. With Rinnai, users can enjoy the convenience of continuous hot water without sacrificing energy efficiency.