Lochinvar Harmony User manual

FunctionChart................................................pg. 2

HarmonyOverview......................................pg.3

PanelInstallation.........................................pg.4

UsingtheMenus.....................................pg.10

SystemStartup........................................pg. 11

OperatingSettings.....................................pg.14

SystemSettings...........................................pg.17

StageSettings............................................pg.22

ResetSettings............................................pg.25

Troubleshooting.......................................pg. 27

Appendix.....................................................pg.28

Index..............................................................pg.30

Specifications................................................pg.32

INSTALLATION & OPERATION MANUAL

TABLE OF CONTENTSABLE OF CONTENTS

ABLE OF CONTENTSABLE OF CONTENTS

ABLE OF CONTENTS

This manual attempted to be complete and accurate at the time of publication. Additional upgrades and new features may change

Harmony functions. Upgrades to this manual may occur at any time. Contact the factory for further details.

HARMONY

Lochinv

Harmony Function Chart

Green Ground

screw must be

connected to

Earth Ground

120VAC

Power

System Output

controls pumps,

valves or other system

components

Each N.O. output is

wired in series with

each unit's limit circuit

The modulation outputs can be 0-5V, 0-10V,

1-5V, 2-10V, or 4-20ma

Different output

boards mount on the back of the Harmony

and determine the type of output.

One output relay is required for

each stage.

If input is not made,

the Harmony will not

consider it an active

stage*

To Temp sensor mounted

in common header

When closed, all stages

are turned off*

* DRY CONTACTS ONLY

** Only available with the Remote Communications package

Checks status of system

components*

Depress the knob to mov

forward through the menus and to

accept changes, rotate the knob

to change a setting's value

Depress the button to go back

through the menus, or to view a

setting value without changing it

The digital display shows the system status,

set point, lead stage <in brackets>, and

status of each stage. To view and adjust

settings, press the Adjust/Select button

FULL MODULATION

SEQUENCING CONTROL

HARMONY

MADE IN U.S.A.

PREV.

111 12

SAFETY

GROUND

MUST BE

CONNECTED

SYS

SYSTEM

TEMP

SHUTDOWN

SYSTEM

PROVE

MENU FUNCTIONS

SELECT

enters menus or accepts changes

ADJUST

selects menu items or changes settings

BACK

returns to previous menu

STAGE

selects stage menus or next stage

PREV/NEXT

steps through stage settings

STAGE

SYSTEM

ABCD

LINE

NEUTRAL

A B C D

OPERATING LIMIT

OUTPUTS

MODULATION OUTPUTS

STAGEHELP NEXT

PRESS TO

SELECT

BACK

181

<A> B C D

100 52 OFF STBY

A B C D

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

ADJUST

INPUTS

A10

BURNER

ACTIVE

A11

A12

OUTDOOR

TEMP

Optional sensor enables

outdoor reset

DO NOT APPLY ANY VOLTAGE

TO SENSOR TERMINALS

EMS INPUT

SIGNAL

SHIELD

Provides remote set

point adjustment with

a 4-20mA signal

To network sensors**

NETWORK

Harmony Overview

Sequences up to 4 Fully Modulating Stages

The Harmony is the perfect control whenever multiple fully modulating stages are required. The Harmony controls the on/

off and the modulation of each stage to maintain precise set point control.

PID Type Logic

The Harmony's control algorithms allow it to look at the rate of change in the system. If the system temperature is

changing quickly, the Harmony will react quickly to adjust the modulating stages' output. If the system temperature

changes slowly, the Harmony will make slow and gradual adjustments. Therefore, the Harmony adapts to specific system

requirements and minimizes fluctuations around the set point.

Controls 0-5 V, 0-10 V, 1-5V, 2-10V, or 4-20 mAmodulating motors

The Harmony is designed to accurately control the output from 0 to 100% of modulation for each of these different types

of motors. One Harmony can even control two different types of motors.

Only One Sensor

The Harmony requires only one sensor located in the common output header of all stages.

Digital Display of all System Settings

The Harmony's 80 character alphanumeric digital display names each system parameter in plain English and shows its

precise value. The easy to follow menu system allows users to quickly make changes to any system setting without

having to learn any specialized codes or keyboard commands. Password protection is available to prevent unauthorized

users from making adjustments to control settings.

Automatic Rotation among Stages

Rotating the first stage to be activated on a call for output promotes even wear on each stage. The Harmony has three

modes of rotation: Manual, First ON/First OFF, or automatically each time period which can be adjusted from every hour

to every 7 days.

Outdoor Reset Control

The Harmony has an optional stand-alone hydronic outdoor temperature reset function.

Connects to Energy Management Systems

The Harmony can accept a 4-20 mA input signal from an EMS to adjust the temperature set point according to outdoor

temperature, system requirements, or other factors. In addition, Harmony can be disabled by an Energy Management

System (EMS) or other controller when there is no output requirement.

Monitors Stage Status

The Harmony is designed to accept a lockout signal from each stage. If any stage requires a manual reset, the Harmony

will automatically skip it when adding more capacity. If a stage goes into lockout during normal operation, the next stage

will be activated immediately to maintain the desired output capacity.

System Output is Active when Any Stage is Active

This output can be used to activate a system pump, combustion air damper, or perform any other function that is required

when any stage is active. A System Prove input checks the status of components activated by the System output before

stages can be activated.

Remote Communication Upgrade Available

The Harmony can be upgraded to the Visual Gold system to monitor and control all Harmony functions from a remote

location. The Visual Gold upgrade also allows the Harmony to accept additional sensors, to monitor their status, and to

provide alarms if the sensor values are not in the correct range.

Additional features include:Apurge timer, a low fire adjustment, a firing point setting for the next stage based on the

firing rate of the current stage, a lag stage timer, a last stage hold adjustment, and many others.

INSTALLATION

MOUNTING THE ENCLOSURE

• Select a location near the equipment to be controlled.

• The surface should be flat, and be sufficiently wide and strong to

hold the Harmony.

• Keep the Harmony panel away from extreme heat, cold, or humidity.

Ambient operating temperature is from 20 to 120°F.

• Remove the panel from the metal enclosure by removing the top

center screw and loosening the two bottom screws. Lift the panel

out.

• Screw the enclosure to the surface through the mounting holes in

the back of the enclosure.

• Return the panel to the enclosure, replace the top screw, and tighten

the bottom two screws.

WIRING THE POWER

• Bring the 120VAC 60Hz power wires through a bottom Knockout

(KO) of the enclosure. The left front KO is preferred.

• Class 1 voltages must enter the enclosure through a different

opening from any Class 2 voltage wiring.

• Connect the hot line to terminal marked LINE.

• Connect the neutral line to the terminal marked NEUT.

• The green ground screw MUST be connected to earth ground.

INPUT WIRING

CONNECTING THE SYSTEM SENSOR

•The Harmony is designed to be connected to a

temperature sensor for immersion in a 3/8ID well.

Contact the factory for additional temperature sensor options.

• Locate the sensor in a common header where it will register the

output of all the stages in the flow and after all stages have fed the

header. If the sensor can not read the output of all the stages, it will

not be able to control the system properly.

• Temperature sensor wires can be extended up to 500’by splicing

with 18 gauge shielded wire (Belden #8760 or equivalent).

• Do not run sensor wire in conduit with line voltage.

• Temperature sensors have no polarity. Connect the wires from the

sensor to the Harmony terminals marked TEMP- A1, A2.

• Connect the shield to the circled terminal TEMP-A2 with one of the

sensor wires.

Note: Cut the shield wire at the sensor end.

Mounting Holes

SAFETY

GROUND

MUST BE

CONNECTED

SYS

LINE

NEUTRAL

120VAC

60 Hz

Earth

Ground

To Temperature

Sensor Mounted in

Common Header

TEMP

SHUTDOWN

NETWORK

SYSTEM

PROVE

INPUTS

A10

INSTINST

INSTALLAALLA

ALLAALLA

ALLATIONTION

TIONTION

TION INPUT WIRINGINPUT WIRING

INPUT WIRINGINPUT WIRING

INPUT WIRING

CONNECTING AN EXTERNAL SET POINT

(4-20mA EMS-CONTROL)

• The Harmony can take a 4-20mA signal from an Energy Manage-

ment System (EMS) or other signal source to change the set point

remotely (see pg. 28 for additional details).

• The signal must be a two-wire 4-20mA.

• A system sensor must be installed as described in the previous

section.

• The External Set Point must be set up correctly (see pg. 12). These

settings will allow the Harmony to read and monitor the system

temperature and also monitor the 4-20mA input to remotely adjust

the Harmony set point to the desired value.

• The Harmony can source the current for the 4-20mA input. It

provides an excitation voltage of 24VDC. If using the Harmony to

source the power, attach the (+) side of the 4-20mA input to the

Harmony EMSterminal marked +. Attach the (-) side of the 4-20mA

signal to the EMS terminal marked SIGNAL.

• If the EMS or other signal sources the current (provides the

excitation voltage), attach the (+) side of the 4-20mA input to the

Harmony EMS terminal marked SIGNAL. Attach the (-) side of the

4-20mAinput to the EMS terminal marked SHIELD.

WIRING THE SHUTDOWN

• This feature can be used whenever it is desirable to turn off the

Harmony from a remote location or another controller.

• A typical use for this feature would be to turn off all boiler stages

when an EMS panel no longer requires heat in the system.

• When the Shutdown feature is enabled by closing a dry contact, all

active stages will immediately modulate down to low. They will

remain in low for 45 seconds and then turn off.

• If the System Output relay was active, it will remain active until the

System Delay is over, then it will also turn off.

• The Shutdown signal must be a dry contact only. No voltage can

be placed across the SHUTDOWN terminals.

• Bring the two wires from the dry contact to the terminals marked

SHUTDOWN-A3, A4.

WIRING THE SYSTEM PROVE

EMS INPUT

SIGNAL

SHIELD

Harmony Sources Curren

24VDC Excitation Voltage

(+)

(-) EMS

Input

EMS Sourcing Current

EMS INPUT

SIGNAL

SHIELD

(+)

(-) EMS

Input

INSTINST

INSTALLAALLA

ALLAALLA

ALLATIONTION

TIONTION

TION INPUT WIRINGINPUT WIRING

INPUT WIRINGINPUT WIRING

INPUT WIRING

Dry Contact

Shutdown

Signal

TEMP

SHUTDOWN

NETWORK

SYSTEM

PROVE

INPUTS

A10

• The System Prove feature is provided to check system component

operation.

• A typical use of this feature is to check for flow before firing any

boiler stages. When there is a call for heat, the System Output

activates the system pump starter. When the pump establishes flow,

a flow switch closes together the SYSTEM PROVE input. Only then

can the Harmony activate boilers and modulate them as required to

hold the temperature set point.

• If the SYSTEM PROVE input is open on a call, the Harmony will

enable only the System Output. All Stage outputs will be off when

the SYSTEM PROVE input is open.

• A factory installed jumper provides the System Prove signal. Do not

remove the jumper unless it will be replaced by a System Prove

signal.

• The System Prove signal must be a dry contact only. No voltage can

be placed across the SYSTEM PROVE - A9, A10 terminals.

• Bring the two wires from the dry contact to the terminals marked

SYSTEM PROVE - A9,A10.

IMPORTANT: DonotremovethefactoryinstalledSystemProve

jumperunless it isreplaced by aSystemProve signal. Ifthe

SYSTEMPROVEinputisnotclosed,theHarmonywillNOT

activatestages.

WIRING THE BOILER ACTIVE INPUTS

• A closure across the BOILER ACTIVE terminals informs the Har-

mony that a boiler is running normally. If the BOILERACTIVE

terminals open, the Harmony registers that the Stage has encoun-

tered a safety limit and can not be restarted without a manual reset.

The Harmony will not reactivate or modulate a Stage which is not

Active.

• The Boiler Active signal is not a safety, but use of these inputs will

significantly improve the Harmony's set point control performance in

the event of a Stage encountering a safety limit.

• A pair of BOILER ACTIVE terminals is provided for each stage.

• The Boiler Active signal must be a dry contact closure from the

boiler controlled by that Stage's output. For example, the Boiler

Active signal wired into terminals STAGEA (Terminals B1 and B2)

must come from the unit whose operating limits are connected to

terminals OPERATING LIMIT OUTPUTS A(Terminals 5and 6).

• The BOILER ACTIVE terminals are dry contacts only. No voltage

can be placed across the them.

• Wire the BoilerActive signals to their respective STAGE terminals:

- STAGE A to BoilerActive Input terminals B1&B2

-STAGE B to BoilerActive Input terminals B3&B4

- STAGE C to BoilerActive Input terminals B5&B6

- STAGE D to BoilerActive Input terminals B7&B8

Dry Contact

System Prove

Signal

TEMP

SHUTDOWN

NETWORK

SYSTEM

PROVE

INPUTS

A10

WARNING: The SYSTEM PROVE

input can not be used as a safety

limit. All equipment must have its

own certified limit and safety con-

trols as required by local codes.

STAGE

Dry Contact

Active Signal

INPUTS

BOILER

ACTVE

WARNING: The BOILER ACTIVE IN-

PUTS can not be used as a safety

limits. All equipment must have its

own certified limit and safety con-

trols as required by local codes.

INSTINST

INSTALLAALLA

ALLAALLA

ALLATIONTION

TIONTION

TION INPUT WIRINGINPUT WIRING

INPUT WIRINGINPUT WIRING

INPUT WIRING

WIRING A SETBACK

• The Setback feature can be used to provide the Harmony with a

lower temperature Set Point when less load is required.

• A typical use for Setback is to lower the system temperature during

the night or on the weekends when a building is unoccupied, but a

minimumlevel of heat isstill required.

• The Setback feature can not be used with External Set Point (4-20mA

EMS-control) or Reset operation (see Startup Settings, pg. 11).

• To adjust the amount of Setback see pg. 19.

• The Setback signal is wired into the EMS terminals (Terminals

SIGNALand SHIELD).

• The Setback signal must be a dry contact only. No voltage can be

placed across the EMS SIGNAL and SHIELD terminals.

• When the EMS SIGNAL and SHIELD are closed, the Setback is

enabled and the Harmony will hold the lower Set Point. The lower Set

Point will appear on the main display indicating this condition.

• When the closure is removed, the Harmony will revert to the higher

saved Set Point.

Note: The Setback is not equivalent to the 4-20mA input, even though

both wire into the EMS terminals. The 4-20mA input requires a 4-

20mA source which changes the Set Point in one degree increments.

The Setback provides a single lower Set Point.

CONNECTING AN OUTDOOR SENSOR

For Reset Operation

• To enable the reset function, see System Startup settings, pg. 11.

For Outdoor Cutoff

• The Harmony will disable all stages when the outdoor temperature is

above the adjustable Outdoor Cutoff temperature.

• This feature will automatically be activated when an outdoor sensor

is connected.

• To adjust the Outdoor Cutoff temperature see pg. 26.

Installing the sensor

•For outdoor sensor use the outdoor sensor.

• Locate the sensor in the shade on the north side of the building

• Be sure the location is out of direct sunlight, and away from doors,

windows, exhaust fans, vents, or other possible heat sources

• The sensor should be mounted at least 4 inches away from the

building wall and approximately 10 feet above ground level

• The sensor wires can be extended up to 500' using shielded 2

conductor cable (Belden #8760 or equivalent).

• Do not run sensor wires in conduit with line voltage wiring.

• Temperature sensors have no polarity. Connect either wire from the

outdoor sensor to one of the Harmony terminals marked OUTDOOR

(Terminals A11&A12).

• Connect the other sensor wire to the other OUTDOOR terminal.

• Connect the shield to the circled terminal OUTDOOR (Terminal A12)

with one of the sensor wires.

OUTPUT WIRING

INSTINST

INSTALLAALLA

ALLAALLA

ALLATIONTION

TIONTION

TION INPUT WIRINGINPUT WIRING

INPUT WIRINGINPUT WIRING

INPUT WIRING

EMS INPUT

SIGNAL SHIELD

Dry Contact

Setback

Signal

NETWORK

SYSTEM

PROVE

A10

A11

A12

OUT

TEMP

To Outdoor

Sensor Mounted

in Shade

SYS A B C

LINE

NEUTRAL

N.O. contacts to activate a pump,

valve or other system componen

WIRING THE SYSTEM OUTPUT

System Output Operation in Set Point Mode

• The SYS output relay will energize whenever there is a call for output

and the Shutdown feature is not active.

• Until the SYSTEM PROVE input is shorted, no Stages will be

activated. If a Prove is not required, the factory installed jumper

should remain.

• The SYS will remain energized while any Stage is active.

• When the last Stage relay turns off, the SYS output can remain

energized for the period of time set by the System Run-On (see pg.

19)

• A typical use of the SYS output is to activate a system pump starter.

The pump can run whenever there is a call for heat. When heat is no

longer required, the pump will stay active for a few more minutes to

remove the residual heat from the boilers.

System Output Operation in Reset Mode

• The SYS output relay will energize whenever the outdoor tempera-

ture is below the Outdoor Cutoff.

• The SYS will remain constantly energized while the outdoor tempera-

ture is below the Outdoor Cutoff.

• When the outdoor temperature rises 2°F above the Outdoor Cutoff,

the SYS output will remain energized for the period of time set by the

System Run-On (see pg. 19).

Wiring the SYS Output

• The SYS output has one Normally Open (N.O.) relay contact.

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

voltage.

• Class 1 voltages must enter the enclosure through a different

opening from any Class 2 voltage wiring.

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

• Total output SYS and the OPERATING LIMIT OUTPUTS must not

exceed15A.

WIRING THE STAGE OUTPUTS

Installing the Output Relays

• Each output stage (Athrough D) which is to be used must have a

relay installed in the socket.

The SYS relay is included with the Harmony.

• To install a relay, orient the pins and then press it gently into the

appropriate socket.

• Any stage output which does not have a relay must have its Mode

set to Off (see Stage Settings pg. 22).

INSTINST

INSTALLAALLA

ALLAALLA

ALLATIONTION

TIONTION

TION OUTPUT WIRINGOUTPUT WIRING

OUTPUT WIRINGOUTPUT WIRING

OUTPUT WIRING

Wiring the Stage Outputs

• Each Stage output (Athrough 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 6Aresistive 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.

WIRING TO 4-20 MAMODULATING MOTORS

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

modulating motors.

• To program the control for 4-20 mAoutput, 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 Aand Bare controlled by a one output board.

The pair of outputs Cand Dare controlled by a second output

board.

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

signal.

• Wire as shown below:

mA Source (+)Common

Stage A

Stage B

Stage C

Stage D

C10

C11

Harmony

Sources

Current

WIRING TO VOLTAGE MODULATING MOTORS

• The Harmony can be equipped to operate up to four 0-5 V, 0-10V, 1-

5V, or2-10Vmodulatingmotors.

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

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

• Toselect the range, 0-5V, 0-10V, 1-5Vor1-10V, see pg. 12.

• The pair of outputs Aand Bare controlled by a one output board.

The pair of outputs Cand Dare controlled by another output board.

• Wire as shown below:

V+GND

Stage A

Stage B

Stage C

Stage D

C10

C12

INSTINST

INSTALLAALLA

ALLAALLA

ALLATIONTION

TIONTION

TION OUTPUT WIRINGOUTPUT WIRING

OUTPUT WIRINGOUTPUT WIRING

OUTPUT WIRING

311 12

SYS A B C D

OPERATING LIMIT

OUTPUTS

Limit Circuit

Typical for each stage

4-20mA

MODULATION OUTPUTS

BC D

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

4 - 20mA

Motor

- +

Common mA

Common

0- 5 V

0-10V

Motor

GND

V+

0- 5 V

0-10V

Motor

GND

V+

0- 5 V

0-10V

Motor

GND

V+

0- 5 V

0-10V

Motor

GND

V+

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

MODULATION OUTPUTS

Voltage

ABCD

USING THE MENUS

MENU TYPES

System Startup Settings - determines the type of system. For example,

the system is a hot water heating system with 0-10V modulating

motors. If the Startup Settings are not correct, the Harmony can not

operate the system correctly.

Set Point/Gain/Lead Stage Settings - These settings might need

occasional adjustment by operating personnel. These are the only

settings which may require changes after the Harmony has been

successfully initialized for your specific type of system.

Stage Settings - determine how the individual Stage outputs are

controlled. When installing the panel, each Stage must be set

correctly, or the Harmony either will not control the Stage or will

controlthem erratically.

System Settings - determine how the system will operate. These are

general settings which affect all Stages. The default settings will

generally work in most applications, but adjustments should be made

to fine-tune the performance of your system.

MENU BASICS

• The menus are in English and will guide you through the settings.

• To change a selection, rotate the black knob marked ADJUST and

PRESS TO SELECT (ADJUST/SELECT). Rotating the knob clock-

wise will move down the list of possible selections. Rotating the

knob counterclockwise will move up the list.

• A pointer in front of a menu line indicates that it is the one currently

selected.

• When the pointer is on the same line as the item to be selected, press

the black ADJUST/SELECT knob. This will either save the selection,

or bring up a new screen to make further changes to that menu item.

• The BACK button will return you to the previous screen without

saving any changes made.

CHANGING SETTINGS

• Some settings require a number, such as time or temperature to be

adjusted.

• These screens will be indicated with the title on top and then the

current numerical value for that setting.

• To change a selection, rotate the ADJUST/SELECT knob. Rotating

the knob will cause a pointer to appear. Both the old and new value

will be displayed.

• The BACK button will return you to the previous screen without

saving any changes made.

• When the new value (the one being pointed to) is correct, press the

ADJUST/SELECT knob. This will save the selection to memory and

return you to the previous menu.

--- LEAD STAGE ----

This pointer shows the currently

selected item

BACK

The BACK button returns to a previous

menu without changing the

selection

PRESS TO

SELECT

ADJUST

Pressing

The ADJUST/SELECT knob

saves the selection to memory

and returns to a previous menu

PRESS TO

SELECT

ADJUST

Rotating

The ADJUST/SELECT knob

moves the pointer up and down

selections

MAKING SELECTIONS

The Purge Delay is currently 1 minute

selected item

BACK

The BACK button returns to a previous

menu without changing the value

PRESS TO

SELECT

ADJUST

Pressing

The ADJUST/SELECT knob

saves the new value (2.0 min) to

memory and returns to a

previous menu

PRESS TO

SELECT

ADJUST

Rotating

The ADJUST/SELECT knob

changes the value - this is

indicated by a pointer from the

old value to a new value

Example: CHANGING VALUES

--- PURGE DELAY ---

1.0 min

The screen shows the old and new value

--- PURGE DELAY ---

1.0 min -> 2.0 min

BACK

The BACK button returns to a previous

menu without changing the value

USING MENUSUSING MENUS

USING MENUS

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