Lochinvar Harmony Installation And Operation Manual Download Page 31

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INDEXINDEXINDEXINDEXINDEX

Sensor

Outdoor 7
Selecting Type 11
System 4
Temperature.

See

Temperature sensor

Set Point 14
Setback 7, 19
SHT 27
Shutdown 5, 19
Stage

Ignition Point 23
Mode 22
Modulation Start 23
Testing 27

Standby Time 19
Startup

Getting the Menu 28
Sequence 11

System Output 8

Testing 27

System Prove 6, 8, 22
System Run-on 19

Temperature

Display Mode 11
Testing sensor 27

Time

Setting 21

Troubleshooting 27

Voltage Motors

Selecting the Range 12
Wiring 9

Wiring

4-20mA Motors 9
External Setpoint 5
Inputs 4
Lockout Inputs 6
Outdoor Sensor 7
Outputs 8
Power 4
Setback 7
Shutdown 5
Stage Outputs 8
System Output 8
System Prove 6
System Sensor 4
Voltage Motors 9

Summary of Contents for Harmony

Page 1: ...7 Appendix pg 28 Index pg 30 Specifications pg 32 INSTALLATION OPERATION MANUAL T T T T TABLE OF CONTENTS ABLE OF CONTENTS ABLE OF CONTENTS ABLE 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 detai...

Page 2: ...ut 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 10 9 8 7 6 5 4 3 2 1 11 12 SAFETY GROUND MUST BE CONNECTED SYS SYSTEM TEMP SHUTDOWN SYSTEM PROVE MENU FUNCTIONS SELECT enters menus or accepts changes ADJUST sele...

Page 3: ...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 ac...

Page 4: ...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 ab...

Page 5: ... the side of the 4 20mA input 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 activ...

Page 6: ...ivate 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 ...

Page 7: ...set 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 t...

Page 8: ...e 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 ...

Page 9: ...hown below mA Source Common Stage A Stage B Stage C Stage D C1 C4 C7 C10 C2 C5 C8 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 or 2 10Vmodulating 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 5Vor...

Page 10: ...er 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 p...

Page 11: ...f F is selected all temperatures and settings will be displayed in degrees Fahrenheit If C is selected all temperatures and settings will be displayed in degrees Celsius Reset Mode Reset F or Reset C Reset mode is only available if an outdoor sensor is connected to terminals A11 and A12 DO NOT select Reset F or Reset C without an outdoor sensor The same outdoor sensor can display either in F or C ...

Page 12: ...eration current or the voltage range can be selected 0 5V 0 10V 1 5V 2 10V Check the modulating motor to determine its control requirements Select the appropriate Output Type for stages A B The Harmony will then automatically bring up the screen for stages C D Select the appropriate Output Type for stages C D If different types of burners are being used stages C D can be selected to have a differe...

Page 13: ...un for process may experience large changes in load almost instantaneously In Process mode the Harmony will react immediately to load changes Large load changes may cause stages to be short cycled as the Harmony can enable and disable stages within seconds After making this selection the main display screen will be displayed OPERATING MODE NORMAL PROCESS OPERATING MODE NORMAL PROCESS OPERATING MOD...

Page 14: ... 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 syste...

Page 15: ... the Set Point controls one stages modulation linearly from 0 to 100 The Process Gain Table below shows the relationship between the Gain and stage modulation The Process Gain Table does not show all the possible modulation values The table is for example only The Harmony will control the modulation in one percent increments based on the Set Point and Gain value SETTINGS Set Point Gain Lead Stage ...

Page 16: ... is shown in brackets on the main display Only Stages which are set to Auto Mode can be Lead Therefore not all the stages may be available when manually selecting a new Lead Stage SETTINGS Gain Lead Stage Stage Settings LEAD STAGE A B C LEAD STAGE A B C PRESS TO SELECT ADJUST Press to show setting PRESS TO SELECT ADJUST Turn to adjust value PRESS TO SELECT ADJUST Press to select new LEAD ST LEAD S...

Page 17: ...fault 24 hour rotation is used at 2 am every morning the Lead Stage will change to the next stage in Auto Mode Note If you do not set the system time see pg 21 the Harmony will assume it was installed at 2 pm If the Rotate Time is changed see pg 20 the Lead Stage will change to the next stage in Auto Mode every time the Rotate Time has elapsed For example with a 12 hour Rotate Time the Lead Stage ...

Page 18: ...nge in output This can be several minutes longer than the actual purge time of the unit LAG DELAY Default 0 min Set the Lag Delay to 0 min when two or more Stages will generally be needed to hold the load The Lag Delay requires the previous stage to remain at 100 modulation for the full period of the Lag Delay before another Stage can be activated For example if the Lag Delay is set to 10 minutes ...

Page 19: ...he Setback feature can be used to provide the Harmony with a lower temperature Set Point when less load is required The lower Set Point will appear on the main display indicating this condition A typical use for Setback is to providea lower system temperature to a factory during the night or on the weekends when product is not being manufactured but heat is still required The Setback will not be a...

Page 20: ...icting Boiler Limits The temperature limits set on the boilers MUST be set considerably higher than the Harmony s Set Point for the reasons detailed below The Harmony sensor is located in a common header some distance from the boilers As the water enters the header and travels to the sensor location energy is dissipated Therefore the temperature in the header will correctly be lower than that regi...

Page 21: ...none of the settings can be changed without entering the Password Once the Password is entered you can make multiple changes The Password will expire 15 minutes after the last change has been made Using the Default Password The Harmony has a built in default Password MMOD Enabling the default Password will prevent most unauthorized users from adjusting the settings but will not prevent Lochinvar s...

Page 22: ...been at 100 modulation for a selectable period of time see pg 14 Standby is generally used when an older or less efficient unit is available but is not desired to run except under extreme load conditions A Standby Stage CAN NOT be a Lead Stage Manual The Manual Mode should only be used when testing a Stage Manual overrides the System Prove input see pg 6 The exact percent of modulation for a Stage...

Page 23: ...be activated and warmed up generally allowing more even set point control Higher settings of the modulation start point prevent unnecessary Stages from being activated Also as most units run more effi ciently at higher modulation a higher setting can result in fuel savings Some general guidelines follow Less than 50 not recommended in the Normal mode 50 70 These lower settings might be used in an ...

Page 24: ...tive Stages will have the same Ignition Start Point and Modulation Point they can be set for Stage A and then copied to the other Stages It is still required to select the Mode for all other Stages The Mode will not be copied IMPORTANT TheModeMUSTbesetforeachstage TheCopy Settings command will not set the Mode for Stages B C and D ST ST ST ST STA A A A A GE SETTINGS GE SETTINGS GE SETTINGS GE SETT...

Page 25: ...ult 0 The Offset value moves the starting point of the Reset Ratio curves see charts below Therefore any change made to the Offset will immediately change the value of the Harmony Set Point water temperature by the same amount For example if the calculated Set Point water temperature were 150 F based on the specific outdoor temperature and Reset Ratio then increasing the Offset from 0 F to 10 F wo...

Page 26: ... Setting the Outdoor Cutoff to On means the heating system will run regardless of outdoor temperature In mild weather the lowest calculated Set Point will be determined by the Minimum Water Temperature next MINIMUM WATER TEMPERATURE Default 70 F Most boilers require a minimum temperature for the water returning from the system to the boiler The Harmony controls the system temperature which is meas...

Page 27: ...it is not operating Red stage light is lit but the unit is not on The Harmony is calling for this unit to be on Follow the procedure above Red stage light is not lit but the unit is on The Harmony is not calling for this unit to be active Remove any wires attached to the Harmony output Check for continuity across the N O contacts If there is no continuity the Harmony output is working correctly Ch...

Page 28: ... Temperature see pg 11 The 4 20mA range adjustment can only be reached through the System Startup menu system see above In the EMS INPUT menu 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 ...

Page 29: ...automatically returns you to the previous adjustment for a Stage without having to return to the Stage Settings menu MANUAL CONVENTIONS Items on the panel knobs buttons terminals are referred to all in upper case letters and italics For example the power terminals are referred to as LINE and NEUTRAL Items on the display are referred to with an upper case first letter and italics For example the se...

Page 30: ...EX INDEX M Menu Basics 10 Changing Settings 10 Stage 22 Moving around 29 System Settings 17 System Startup 28 Types 10 Minimum Water Temperature 26 Modulation Loading Mode 12 23 Modulation Start 23 Motor Selecting Type 12 N Normal Loading 12 23 O Offset 25 Operating Mode 13 Normal Gain 15 Process Throttle 15 OPN 27 Outdoor Cutoff 7 14 26 Outdoor Reset See Reset Outdoor Sensor 7 P Parallel Loading ...

Page 31: ...Startup Getting the Menu 28 Sequence 11 System Output 8 Testing 27 System Prove 6 8 22 System Run on 19 T Temperature Display Mode 11 Testing sensor 27 Time Setting 21 Troubleshooting 27 V Voltage Motors Selecting the Range 12 Wiring 9 W Wiring 4 20mA Motors 9 External Setpoint 5 Inputs 4 Lockout Inputs 6 Outdoor Sensor 7 Outputs 8 Power 4 Setback 7 Shutdown 5 Stage Outputs 8 System Output 8 Syste...

Page 32: ...5 8 Temperature Accuracy 1 F 1 C Temperature Display Field select F or C Temperature Range 30 to 250 F 35 to 120 C Ignition Start Point 1 to 50 Modulation Start Point 50 to 100 Operating Mode Normal or Process Purge Delay 1 0 to 10 0 minutes Lag Stage Delay 0 to 60 minutes System Run On Delay 0 to 30 minutes Standby Time 0 to 60 minutes Setback 0 to 75 F 0 to 42 C Last Stage Hold 0 to 30 F 0 to 30...

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