Lochinvar Harmony Appendix, System Startup Menu, EXTERNAL SET POINT 4-20MA EMS-CONTROLRANGE

APPENDIX

SYSTEM STARTUP MENU

•On the initial start-up, the Harmony will automatically step through the System Startup. After that, it must be reached through the menu system.

•DO NOT make changes to the System Startup unless you have carefully checked the installation. An incorrect setting in the System Startup menus may cause the Harmony to be unable to read the sensor, unable to output, or generally just not operate the system.

•DO NOT make changes to the System Startup unless you have copied all other settings and are prepared to restore them. Some changes in the System Startup may cause Operating, Stage, and System settings to revert to their default values.

•From the main display, press the ADJUST/SELECT knob and release it to reach the Settings display.

•Scroll down to <System Startup> and select it.

•The screen will show System Startup and Select to continue.

•Read and follow the prompts until Sensor Type is displayed.

•Follow the directions starting on pg. 11 to set each item correctly.

WARNING: DO NOT make changes to the System Startup Menu without first carefully read- ing the preceding section. Making changes to the System Startup may cause the Harmony to no longer control the system or to control the system erratically.

EXTERNAL SET POINT (4-20MA EMS-CONTROL) RANGE

Set-Up

•The 4-20mA option is not available when using the Reset Function. It is only available for systems where the Sensor Type is Temperature (see pg. 11).

•The 4-20mA range adjustment can only be reached through the System Startup menu system (see above).

•In the EMS-INPUTmenu, press the ADJUST/SELECT knob to select EMS-Control.

•The next screen is EMS 4ma Setpoint. This screen allows you to set the desired Harmony Set Point when the EMS input is 4mA. The temperature range of the selection is from 100 to 240°F. Rotate the ADJUST/SELECT knob until the desired value is selected and then press the knob.

•The next screen is EMS 20ma Setpoint. This screen allows you to set the desired Harmony Set Point when the EMS input is 20mA. The range of the selection is from 100 to 240°F. Rotate the ADJUST/SELECT knob until the desired value is selected and then press the knob.

APPENDIX

Operation

•The Set Point will vary linearly with the 4-20mA signal from the EMS signal, as shown by the example set points in the chart on the right.

•Either 4 or 20mA can be the bottom (or top) of the Set Point range.

•If the signal from the EMS is not connected, is less than 3.9mA, or is greater than 20.1mA, the Harmony Set Point will flash OFF and no stages will be active. This feature can be used as an external shut- down.

IMPORTANT: If the Harmony is not wired to the EMS, or if the signal is less than 3.9mA or greater than 20.1mA, the display will flash OFF. This indicates the input signal from the EMS is not properly wired (see pg. 5) or the EMS system may not be correctly config- ured.

4-20mA Temperature Example

4-20ma Input	MOD-4 Set Point
4ma (adjustable setting)	100°F
8ma	125°F
12ma	150°F
16ma	175°F
20ma (adjustable setting)	200°F

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