Lochinvar Harmony manual

1 Function Chart................................................pg. 2 Harmony Overview ......................................pg. 3 Panel Installation.........................................pg. 4 Using the Menus.....................................pg. 10 System S tartup ........................................pg. 1 1 Operating Settings.............[...]

2 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 Harmon[...]

3 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 T ype Logic The Harmony's control algorithms allow it to look at the rate of change [...]

4 INST ALLA TION 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 e[...]

5 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. ?[...]

6 • 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 [...]

7 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 minimum level of heat is still required. • The Setback feature can no[...]

8 10 9 8 7 6 5 4 3 SYS A B C 2 1 LINE NEUTRAL N.O. contacts to activate a pump, valve or other system componen t 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 [...]

9 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 120V AC. • T otal output of all stages, including the SYS, must not exceed 15A. • W ire the N.O. [...]

10 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[...]

11 SYSTEM ST ARTUP ST ARTUP SEQUENCE • The series of initialization screens appears on the left. The Harmony will automatically step through the screens. • When powered, the Harmony performs a self test on its compo- nents. • After the self test diagnostics have been successfully completed, the Harmony will initialize the panel. • On the fi[...]

12 - MODULATING MODE >NORMAL PARALLEL - MODULATING MODE NORMAL >PARALLEL - MODULATING MODE NORMAL >PARALLEL PRESS TO SELECT ADJUST Press to select Normal PRESS TO SELECT ADJUST or turn to scroll down PRESS TO SELECT ADJUST Press to select Parallel EMS INPUT Default - Setback Not available for Reset Sensor T ypes Setback • This default se[...]

13 SELECTING THE OPERA TING MODE Default - Normal • Most heating applications do not experience rapid changes in system temperature. For these systems, it is best to adjust the modulation based on the rate of system rise or fall. This PID type of algorithm will help to prevent short cycling of the stages, reduce thermal stress on the system, and [...]

14 OPERA TING SETTINGS CHANGE SET POINT , GAIN, LEAD ST AGE THE MAIN DISPLA Y • 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 stat[...]

15 GAIN/THROTTLE OPERA TING MODE - NORMAL Default = 0 • The Gain adjusts the PID logic in the Harmony to control how much modulation is changed when the system temperature is different from the Set Point. • A Gain of 0 is a good starting point for all systems. • If, during normal load conditions, the system temperature tends to fluctuate sign[...]

16 LEAD ST AGE Used to manually change the lead stage • The Lead Stage is the first stage brought on when output is required. • The Lead Stage can be rotated manually or automatically . The automatic rotation is recommended (see pg. 17). • The current Lead Stage is shown in brackets on the main display . • Only Stages which are set to Auto [...]

17 SYSTEM SETTINGS THE SYSTEM SETTINGS MENU • These are general settings which affect all Stages and overall operation. • The Harmony will generally operate satisfactorily with the default settings. However , it is recommended that each of these settings be checked on Startup to tune the Harmony to the particular system. • From the main displ[...]

18 Lst on • On power up, or any time the Harmony loses power , the Lead S tage will be the lowest stage in Auto Mode (that is, A first, then B, C, or D). • The Lead Stage will always be the first stage brought on and modulated when there is a call for output. As more output is needed, additional stages are added. • When less output is needed,[...]

19 ST ANDBY TIME Default - 10 min • The Standby Time only applies to Stages in Standby Mode. • A Standby Stage can only be activated after all the Stages in Auto Mode have run at 100% modulation for the full Standby Time. • Standby Stages are used for backup up or extreme load conditions only . A Standby Stage can never be a Lead S tage • T[...]

20 ROT A TE TIME Default 24hr • The Rotate Time only takes effect if the Auto Rotate type is Time (see pg. 17). • The default value is 24 hours and is appropriate for most systems. W ith 24 hour rotation, 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 [...]

21 --- LOGIN --- Enter password: M*** --- LOGIN --- Enter password: M*** --- LOGIN --- Enter password: MM** PRESS TO SELECT ADJUST Turn to adjust Letter 1 PRESS TO SELECT ADJUST Press to select Letter 1 PRESS TO SELECT ADJUST Turn to adjust Letter 2 CHANGE PASSWORD? No >Yes -- NEW PASSWORD -- Enter password: M*** --- LOGIN --- Enter password: M*[...]

22 ST AGE SETTINGS INDIVIDUAL ST AGE ADJUSTMENTS THE ST AGE MENU • In most installations, all Stage adjustments are the same, but each of the four output Stages can be configured differently if desired. • If the stages are not set up properly , the Harmony operation may appear to be erratic. • From the main display , press the ST AGE button a[...]

23 IGNITION POINT Default - 1% When Can a Stage Begin Modulating? • The Ignition Point is the percent modulation which must be attained before the unit can be activated. • For most boilers, the Ignition Point should be set at 1%. • Older units or atmospheric units may require the modulating fuel valve to be open from 20-50% before proper igni[...]

24 Modulating Mode - P ARALLEL • The Modulation Point should be set to the value where the unit runs most efficiently . • Contact the manufacturer to determine the appropriate setting. COPY SETTINGS - ST AGE A ONL Y • If all the active Stages will have the same Ignition Start Point and Modulation Point, they can be set for Stage A and then co[...]

25 RESET SETTINGS RESET RA TIO Default 1:1 • The Reset Ratio controls how much heat will be added based on outdoor temperature. The Reset Ratios are shown as Outdoor T emperature:W ater T emperature. • A 1:1 Reset Ratio signifies for each degree it gets colder outside, the Calculated water temperature will raise 1 degree. • The other Reset Ra[...]

26 • In a new installation, start with an Offset value of 0°. • Adjust the Offset value in mild weather . If the ambient indoor temperatures are warm in the warm weather , decrease the Offset. If the ambient building temperatures are cold in the mild weather , increase the Offset. • The rule of thumb for baseboard radiation is to change the [...]

27 TROUBLESHOOTING No Display , or Garbled Display Check the 120V AC power input to the Harmony . T urn power to the Harmony off and back on. TEMPERA TURE INPUTS Display shows OPN Check the System Startup settings (pg. 11) to be sure the Harmony is configured correctly to read the temperature input. Then check a sensor is connected and the wires ar[...]

28 APPENDIX SYSTEM ST ARTUP 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[...]

29 MOVING AROUND THE ST AGES MENUS • Pressing the ST AGE button allows you to automatically scroll though the S tage A , B , C , and D Settings . • Pressing the NEXT button automatically moves you through the adjustments for each stage. For example, after viewing the Ignition Point , pressing the NEXT button will move you to the Modulation Star[...]

30 Index Symbols 4-20mA EMS Input. See External Set Point 4-20mA Motors W iring 9 B Baseboard applications 25, 26 C Copy Settings 24 D Display Main 14 None or Garbled 27 OPN 27 SHT 27 E External Set Point 5, 12, 14, 19 Setting the Range 28 G Gain Normal 15 Process 15 H HWR 19 I Ignition Point 23 L Lag Delay 18, 23 Last Stage Hold 20 Lead 14, 15, 16[...]

31 INDEX INDEX INDEX INDEX INDEX S Sensor Outdoor 7 Selecting T ype 1 1 System 4 T emperature. See T emperature sensor Set Point 14 Setback 7, 19 SHT 27 Shutdown 5, 19 Stage Ignition Point 23 Mode 22 Modulation Start 23 T esting 27 Standby Time 19 Startup Getting the Menu 28 Sequence 11 System Output 8 T esting 27 System Prove 6, 8, 22 System Run-o[...]

32 HARMONY SPECIFICA TIONS Input V o lt age .......................................................................120V AC Power Consumption ...............................................................30V A Lead Stage Rotation Manual First On/First Off Automatically ................................Every hour to every 7 days Output T ypes .......[...]