Lochinvar Harmony operation manual Operating Settings, The Main Display, Set Point Display

SET POINT

	Temperature
<A>	B	C	D
OFF	OFF	OFF	OFF
---	SETTINGS		---
>Set Point
Gain	Stage
Lead
---	SET POINT		---
	Value

ADJUST Press to show

PRESS TO SELECT Settings

ADJUST Press to show

PRESS TO SELECTSet Point

OPERATING SETTINGS

CHANGE SET POINT, GAIN, LEAD STAGE

THE MAIN DISPLAY

•The main display screen may have different values in the top two lines depending on the application.

•The third line shows the four stages. The Lead Stage will be in brackets. For example, the Lead Stage shown at left is <A>.

•The last line shows the status of each stage. The stages may be Off or the actual percent modulation will be displayed.

•To reach the Settings menu, press the ADJUST/SELECT knob and release it.

SET POINT

---	SET POINT	---	ADJUST	Turn to
Value -> New Value				adjust
			PRESS TO SELECT	value
---	SET POINT	---	ADJUST
Value -> New Value			PRESS TO SELECT
If the optional Outdoor Sensor
	is installed
-- OUTDOOR CUTOFF --			ADJUST	Turn to
Value -> New Value				adjust
			PRESS TO SELECT	value
-- OUTDOOR CUTOFF --			ADJUST	Press to
Value -> New Value				select
			PRESS TO SELECT	new

SET POINT DISPLAY

•The Set Point is the temperature value the Harmony will use to control the system.

•The Harmony will either increase the amount of modulation, decrease the amount of modulation, or maintain the same amount of modulation to maintain the system temperature around the Set Point.

•The Set Point is the target temperature the Harmony will maintain. The system can be expected to fluctuate above and below the Set Point. The size of the fluctuation depends on the number of stages, the system load, and the Operating Mode selected (see pg. 13).

Outdoor Cutoff Temperature

•If the outdoor sensor is installed (see pg. 7), the Outdoor Cutoff screen will automatically appear after the Set Point has been selected.

•When the outdoor temperature falls to the adjustable Outdoor Cutoff temperature, the Harmony will control and modulate stages to hold the temperature Set Point.

•When the outdoor temperature rises to the Outdoor Cutoff tempera- ture plus a 2°F differential, the Harmony will disable the system.

RESET °F AND RESET °C

•The Set Point is based on the Reset Ratio, Offset, and Outdoor Cutoff. To make these settings, see pg. 25.

EXTERNAL SET POINT (4-20mA EMS- CONTROL)

•The Set Point value can only be changed by adjusting the 4-20mA input wired into the Harmony, see pg. 28.

•Rotating the ADJUST/SELECT button will have no impact on the Set Point value.

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