Lochinvar Harmony Output Wiring, WIRING TO 4-20MA MODULATING MOTORS, Installation, Voltage

3 4 5 6 7 8 9 10 11 12

C

SYS	A	B	C	D
		OPERATING LIMIT
		OUTPUTS
			Limit Circuit

Wiring the Stage Outputs

•Each Stage output (A through D) has one Normally Open (N.O.) relay contact.

•The N.O. contacts are dry contacts only. They do not source any voltage.

•Each N.O. contact is capable of switching 6A resistive at 120VAC.

•Total output of all stages, including the SYS, must not exceed 15A.

•Wire the N.O. relay contacts in series with the boiler’s limit circuit.

•Class 1 voltages must enter the enclosure through a different opening from any Class 2 voltage wiring.

INSTALLATION

Typical for each stage

4-20 mA

MODULATION OUTPUTS

Common	Common		Common		Common
mA		mA		mA		mA

C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12

A B C D

-+

4 - 20mA Motor

WIRING TO 4-20 MA MODULATING MOTORS

•The Harmony can be equipped to operate up to four 4-20 mA modulating motors.

•To program the control for 4-20 mA output, see System Startup settings, pg. 12.

•Apply the supplied label marked 4-20 mA below the output termi- nals.

•The output boards are connected on the rear of the panel.

•The pair of outputs A and B are controlled by a one output board. The pair of outputs C and D are controlled by a second output board.

•The Harmony sources 24VDC excitation voltage for the 4-20mA signal.

•Wire as shown below:

		Common	mA Source (+)
	Stage A	C1	C2
Harmony	Stage B	C4	C5
Sources
	Stage C	C7	C8
Current
	Stage D	C10	C11

OUTPUT WIRING

Voltage

MODULATION OUTPUTS

V+ V+ V+ V+

GND GND GND GND

C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12

	A		B		C		D
0- 5 V		0- 5 V		0- 5 V		0- 5 V
	or		or		or		or
0-10V		0-10V		0-10V		0-10V
Motor		Motor		Motor		Motor
	A		B		C		D

WIRING TO VOLTAGE MODULATING MOTORS

•The Harmony can be equipped to operate up to four 0-5 V, 0-10V, 1- 5V, or 2-10V modulating motors.

•Apply the supplied label marked Voltage below the output terminals.

•The output boards are connected on the rear of the panel.

•To select the range, 0-5V, 0-10V, 1-5V or 1-10V, see pg. 12.

•The pair of outputs A and B are controlled by a one output board. The pair of outputs C and D are controlled by another output board.

•Wire as shown below:

	GND	V+
Stage A	C1	C3
Stage B	C4	C6
Stage C	C7	C9
Stage D	C10	C12

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