Lochinvar EcoShield High Efficiency Gas Fired Condensing Water Heater User & SMART SYSTEM Control Guide

1.0 User Guide

1.1 General Requirements

This equipment must be installed by a competent person, registered with a H.S.E. approved body. All installations must conform to the relevant Gas Safety and Building regulations. Health & safety requirements must also be taken into account when installing any equipment.

Failure to follow these instructions may lead to severe injury, serious property damage or death.

A competent person must also undertake any alterations that require the gas train or flue system to be broken.

Any interference with a sealed component is forbidden.

Failure to comply with the above may lead to prosecution.

Incorrect use may result in injury and will also invalidate the warranty.

1.2 Procedure for Lighting

1. Ensure that the gas-inlet appliance isolating valve, provided by the installer, is in the "On" position.
2. Press the power rocker switch, positioned inside the service access front cover (see section 2), to the on position.
3. Press the Enter/Reset button on the user control interface panel to initiate the burner.
4. The combustion fan should ramp up to full speed to purge the combustion chamber and then drop back to half rate in order to light. The spark generator should create a spark, visible through the burner sight glass. The appliance will attempt to light 4 times (SHW35-210-SHW116-410) or once (SHW146-410). If the unit does not light, it will go to lockout. If this occurs, please contact a qualified Gas Service Engineer.
5. Once a flame is established, the LCD display will change to display the Temperature and Setpoint.

1.3 Procedure for Shutting Down

To take the appliance out of service, the Enter/Reset button should be pressed. If the appliance is to be shut down for a long period of time, the power supply should be isolated using the rocker switch on the back and the gas supply should be isolated at the gas inlet appliance isolating valve.

1.4 Temperature Adjustment Procedure

The setpoint can be adjusted using the Up ⬆️ and Down ⬇️ buttons on the Smart System control panel. Once the desired setpoint is displayed, the Enter/Reset button should be pressed to store the value.

The setpoint should be adjusted to ensure that the water is stored at 60°C and distributed at 50°C within 1 (one) minute at all outlets. Care is needed to avoid much higher temperatures because of the risk of scalding. At 50°C, the risk of scalding is small for most people, but the risk increases rapidly with higher temperatures and for longer exposure times. The risk to young children and to those with a sensory or mobility loss will be greater. Where a significant scalding risk has been identified, the use of thermostatic mixing valves on baths and showers should be considered to reduce temperature; these need to be placed as close to the point of use as possible.

1.5 Maintenance

The Lochinvar EcoShield must be serviced by a competent engineer at a maximum interval of every 12 months. By law, location, and usage patterns, service intervals may need to be more frequent.

Details of the necessary maintenance work can be found in the Installation, Commissioning and Maintenance Instructions. If these instructions are not available, a copy should be obtained from the Lochinvar website www.lochinvar.ltd.uk or by using the contact details on the back cover of this document.

1.6 Frost Protection

If the temperature of the water at the inlet side of the heat exchanger drops below 7°C, the primary pump will be energised. If the temperature of the water at the inlet side of the heat exchanger drops further and reaches 3°C, the burner will fire. If the temperature rises above 10°C, the burner and the pump will shut down.

1.7 Air Supply

When installed as a conventionally flued appliance, the room in which the appliance is installed must be ventilated.

Blocking these air vents may lead to severe injury, serious property damage or death.

The area in which the appliance is installed should not be used to store any other materials.

1.8 Condensate Drain

The condensate drain must not be blocked or modified in any way. If fitted with a neutralisation kit, this must be replaced at least every 12 months to ensure correct operation. Due to its design, no further maintenance should be necessary.

2.0 Smart System Control

2.1 User Control Interface Panel

The user control interface panel features a display screen and several buttons for operation and settings adjustment.

Display: Shows current temperature, setpoint, operating status, and error messages.

Buttons:

• RESET: Press to reset the water heater when in a lockout condition.
• ENTER: Press to select the next menu item, store parameter data after programming, or exit Service Mode.
• UP ⬆️: Press to select various operating data or adjust parameters in menus.
• DOWN ⬇️: Press to select various operating data or adjust parameters in menus.

(Refer to Figure 2.1 in the original document for a visual representation of the panel.)

2.2 Sequence of Operation

The following describes the typical sequence of operation upon a call for heat:

3.0 User Settings

3.1 User Adjustable Parameters Screen

To access the User Adjustable Parameters screen, press and hold the ENTER button for 5 seconds. The user code 'u01' should appear in the lower digits. Use the ⬆️ and ⬇️ buttons to scroll through the seven available parameters and the ENTER button to make a selection. After cycling through all parameters, new values are saved.

• 16.1.1 CODE u01: Temperature units (°C/°F) – Press ⬆️ or ⬇️ to display the desired unit and press ENTER to select.
• 16.1.2 CODE u02: Hot Water Set Point – The factory default is 52°C. The target temperature can be set between 16°C and 85°C. Press ⬆️ or ⬇️ to display the desired temperature and press ENTER to select.
• 16.1.3 CODE u03: Year – Press ⬆️ or ⬇️ to display the current year and press ENTER to select.
• 16.1.4 CODE u04: Month – Press ⬆️ or ⬇️ to display the current month and press ENTER to select.
• 16.1.5 CODE u05: Day – Press ⬆️ or ⬇️ to display the current day and press ENTER to select.
• 16.1.6 CODE u06: Hour – Hours are displayed in 24-hour format. Press ⬆️ or ⬇️ to display the current hour and press ENTER to select.
• 16.1.7 CODE u07: Minute – Press ⬆️ or ⬇️ to display the current minute and press ENTER to select.

3.2 Pasteurisation Function (Using Night Set Back Facility)

3.2.1 Procedure for Weekly High Temperature (70°C) Pasteurisation

Follow these steps for a weekly high temperature pasteurisation:

1. Access the installer menu (Down ⬇️ & Enter for 5 seconds).
2. Set parameter p02 to 15°C (deduction from pasteurisation temperature; can be reduced to 10°C for 65°C storage).
3. Set parameter p03 to 75°C (maximum setpoint).
4. Exit the installer menu.
5. Access the user menu (Enter for 5 seconds).
6. Set parameter u02 to 75°C (pasteurisation temperature).
7. Check that parameters u03 to u07 display the correct date and time.
8. Exit the user menu.
9. Access the setback function menu (Up ⬆️ & Down ⬇️ for 5 seconds).
10. Set the trigger values as follows:

11. Exit the setback function menu (Enter for 5 seconds).

This configuration causes the water heater to operate at a reduced temperature between 00:00 and 23:59 daily, except for Sunday morning when the reduced temperature becomes active at 02:00. From Saturday night 23:59 until Sunday 02:00, the setpoint will be 75°C.

3.2.2 Procedure for Daily Pasteurisation (Domestic Hot Water < 60°C)

⚠️ Systems must always comply with the requirements of L8. Running water heaters at low temperatures may encourage the growth of legionella bacteria.

1. Access the installer menu (Down ⬇️ & Enter for 5 seconds).
2. Set parameter p02 to the required temperature less than the standard pasteurisation setting of 65°C (e.g., if the daily set point is 50°C, set p02 to 15°C).
3. Set parameter p03 to 65°C (this is the pasteurisation setting).
4. Exit the installer menu.
5. Access the user menu (Enter for 5 seconds).
6. Set parameter u02 to 75°C (this is the pasteurisation temperature).
7. Check that parameters u03 to u07 display the correct date and time.
8. Exit the user menu.
9. Access the setback function menu (Up ⬆️ & Down ⬇️ for 5 seconds).
10. Set the trigger values as follows:

11. Exit the setback function menu (Enter for 5 seconds).

This configuration causes the water heater to operate at the reduced temperature between 00:59 and 23:59 each day, with the exception of the period from 23:59 until 00:59 when the setpoint will be 65°C.

⚠️ During the pasteurisation period, any outlets without temperature limiting devices fitted will have very hot water. Suitable precautions should be taken to inform all potential users.

3.3 Night Setback Screen

To access the Night Setback screen, press and hold the ⬆️ and ⬇️ buttons simultaneously for 5 seconds. The trigger type (On/OFF) will be shown in the upper digits.

1. Use the ⬆️ and ⬇️ buttons to display the desired trigger type (On or OFF) and press ENTER to select.
2. The trigger number (e.g., On1, OFF1) will appear in the upper digits. On1 is the first trigger to lower the tank set point. Press ENTER.
3. The day of the week will appear in the lower digits (1 = Monday, 2 = Tuesday, etc.). Press ⬆️ or ⬇️ to display the desired day and press ENTER to select.
4. The time for that trigger will appear, with the hour digits flashing. Press ⬆️ or ⬇️ to display the desired hour and press ENTER to select.
5. The minute digits will then start flashing. Press ⬆️ or ⬇️ to display the desired minutes.
6. If all triggers are set, press and hold ENTER for 5 seconds to save. The burner will shut off and automatically re-ignite. Otherwise, press ENTER once.
7. The lower digits will clear, and the upper digits will display the trigger type again. Repeat steps 2-5 to set all desired triggers.

3.4 Error Log Screen

The water heater automatically stores the 10 most recent errors. To access the error log screen, press and hold the ⬇️ button for 5 seconds. The upper digits display the error number (most recent is "1"). The lower digits display error details in 2-second intervals:

1. Error Code
2. Hour and Minute of the error
3. Date of the error
4. Year of the error

Press the ⬆️ button to view the next errors. Press and hold ENTER to pause the information; releasing it resumes the display. Press and hold ⬇️ for 5 seconds to exit the error log screen.

3.5 Error Codes

The user interface provides information on Error codes, which can be one of three types:

1. Lockout codes: May require user reset and/or service engineer investigation.
2. Blocking codes: May require investigation by a service engineer.
3. Notification codes: The unit continues to operate, but a service engineer is required.

Lockout Codes

Blocking Codes

Notification Codes

4.0 ErP Specification Data Sheet