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Mini-MOD and Mini-Extension Installation Manual - Heat

1. Fahrenheit or Celsius oe riot Ree dined uas oS oer Be oce E KS Graphical Alphanumeric 7 rows x 21 char each Temperature Sensor 35 F to 250 F Outdoor Cutoff Range 20 F 17 C to 100 F 38 C ON and OFF Set Point lt Be ae Ba Mele eue WE Weeds 10 F 23 C to 230 F 110 C External Set Point 10 F 23 C to 240 F 116 C using 4 20mA EMS Interface optional Reset Ratio Range Outdoor Reset Only 1 4 to 8 1 Outdoor System Water and Custom Reset Ratio Offset Adjustment Outdoor Reset Only minus 40 F 22 C to plus 40 F 22 C Minimum Target Outdoor Reset 70 F 21 C to 170 F 77 C Maximum Target Outdoor Reset Only 90 F 38 C to 240 F 116 C Reaction Time PID only 1 to 10 minutes Minimum Run Time PID 0 to 60 minutes Purge Delay PID only 0 0 to 10 0 minutes Last Stage Hold PID only 0 F 0 C to 30 F 17 C Throttle Range 2 F 1 C to 20 F 11 C Domestic Hot Water Priority Options Parallel Piping with Priority or without Priority and Primary Secondary Pump IS DSO TEE du seo erar e
2. 8 Mounting the Enclosure 8 InstallitheSensors es 9 System Sensor Installation 9 Outdoor Sensor Installation 9 Wirltig 4 nh aue 10 Wiring the Power Terminals 1 2 10 Wiring the 5 10 Wiring the Domestic Hot Water DHW Sensor Terminals 33 nM C dehy ed BOE ad 11 Wiring the Shutdown Terminals 35 36 11 Wiring the T STAT Terminals 35 36 11 Wiring the Setback Terminals 35 36 11 Wiring the Prove Terminals 37 38 11 Wiring the System Output Terminals 19 20 12 Wiring the DHW Pump Terminals 21 22 12 Wiring the Combustion Air Damper Terminals 23 24 12 Wiring the Stages Terminals to 17 12 Connecting to the SQ Elite EXT Panels and 4 20mA EMS Interface num Ei le A pu ines Ee nius 13 Selecting the SQ Elite EXT Panel Letter 13 INSTALLER MENU SEQUENCE 14 Startup Settings 17 Program Change Settings 17 Startup Sequence 17 Control Mode 2 0020 eee 17 Display Unit a x ceto ER e ae Eos 17 Setting the 4mA and 20mA Set Points Available in 4 20mA EMS only LL 17 Application s a EG ER EGRE kota 18 DHW Piping Available with Heating Only 18 DHW Pump Output 0 0 18
3. Comm Power ane AUTION E Tm T f o M K a MUN EY RC membro o D d 6 Pin Phone Cable provided with Extension SQ Elite EXT B sr oi pmm 4 20mA EMS Interface Bla 4 0 4 20 6 Pin Phone Cable provided with 4 20mA EMS Interfac EMS Signal e 14 Heat Timer Corp INSTALLER MENU SEQUENCE STARTUP A ALERT To access Installer Menu hold down the Menu button for over three seconds To be able to change the SQ Elite settings the Program Run Switch must be set to Program EMS ie POINT MAINTENANCE SET POINT SQ Elite 8T amp SQ Elite EXT Installation Manual RESET RATIO DHW SETTINGS 15 16 Heat Timer Corp STAGE SETTINGS SCHEDULES Not Available when Setback is Selected from Startup Menu STAGE MENU SQ Elite 8T amp SQ Elite EXT Installation Manual 17 STARTUP SETTINGS LAERT Can be accessed by holding down the Menu A good practice after performing any Startup menu modifications is to button for over three seconds check all operating settings and adjustments to match the new settings PROGRAM CHANGE SETTINGS PROGRAM RUN To be able to change the SQ Elite settings the Program Run Switch must be set to Program ie The switch is located under the Enclosure Wiring Cover for security Th
4. If Prove fails after the boiler stages where energized the stages will de energize and the message will display until the situation is rectified If No is selected the PROVE input will be used to check System status instead of the Combustion Air Damper s No boiler stages will be active until the Prove EXTERNAL INPUT MODE Shutdown Tstat Setback Default Shutdown Hold Button MENU lt System Startup gt External Input e The Shutdown function allows the SQ Elite 8T to receive a remote Shutdown signal to terminals 35 and 36 to turn off all relays including all boilers stages When Shutdown is selected DHW calls will be ignored unless the control is out of Shutdown SQ Elite 8T amp SQ Elite EXT Installation Manual 19 e The Tstat option gives terminals 35 and 36 the capability of functioning as a heat call That is when terminals 35 and 36 are shorted the SQ Elite 8T will sequence the stages However when they are opened all stages will turn off Setback is used to lower the set point when less load is required during nights and weekends e For setback operation the SQ Elite 8T can either utilize its built in night schedule available when Shutdown or Tstat is selected as the External Input or an external dry contact signal to switch to setback by selecting Setback from this menu BURNER TYPE On Off 2 Stage 3 Stage 4 Stage Default On Off Hold Button MENU System Startup gt Burner
5. e Forthe lowest stage of a unit the Minimum Runtime starts after the purge cycle e This timer does not apply to the last stage online The Last Stage Hold applies in that case Initially set the Minimum Runtime to half the Reaction Time If System tends to overshoot reduce the Minimum Runtime If boilers tend to short cycle increase Minimum Runtime SQ Elite 8T amp SQ Elite EXT Installation Manual 25 STANDBY DELAY Adjustable from 1 to 60 minutes Default 10 minutes Hold Button MENU lt System Settings gt lt Stage Settings gt Standby Delayin PID Logic only e The Standby Delay only applies to units in Standby Mode See Mode on page 32 AStandby unit can only be activated after all the units in Auto Mode have had all their stages on running for the full Standby Time e Standby units are used as a backup in extreme load conditions A Standby unit can never be a Lead unit e The full Standby Delay must always elapse regardless of what happens to the system temperature Therefore shorter Standby times will result in smoother set point operation in extreme conditions Longer Standby times may prevent a Standby unit from starting if the other units can eventually meet the load or if the load decreases When setting the Standby Delay remember that it will be added to the Reaction Time for the first stage on the first standby unit The following stages start time will rely on Pre Purge and Reaction Time only LAST STAGE HO
6. 22 SET POINT NOT ADJUSTABLE IN EMS MODE Adjustable from 10 F 23 C to 230 F 110 C Default 70 F 21 C Button MENU Set Point In Set Point or EMS 4 20mA OUTDOOR CUTOFF TEMPERATURE Adjustable Off from 20 F 7 C to 100 F 38 C On Default 70 F 21 C Hold Button MENU Set Point Outdoor Cutoff in Set Point Hold Button MENU Outdoor Reset gt Outdoor Cutoff in Reset TARGET OFFSET Adjustable from 40 F 22 C to 40 F 22 C Default 0 F 0 C Hold Button MENU lt Outdoor Reset gt Offset in Outdoor Reset only Heat Timer Corp To Set the first point specify Sys Temp 1 and OD Temp 1 Then specify Sys Temp 2 and OD Temp 2 to set the second point on the curve The two points can be anywhere on the line not necessarily at the ends The chart shows an example of a customized curve 6 OD 5 SYS that does not exist in the standard curve options If the outdoor temperature reaches 30 F the system target will be 145 F Remember that the Offset Min Target and Max Target apply to all reset ratios including the customized reset ratio ones Point1 System 120 F Point2 System 170 F F Oudoor 0 F Max Target 20 f Water Temperature in F e E 60 50 40 30 20 10 0 10 X Outdoor Temperature in F Custom Reset Ratio The Set point is the temperature value the SQ Elite 8T will use to control the system The SQ Elite 8T will add subtract or hold the stages of the heating or cooling unit
7. 8T will raise the calculated water to 170 F 150 F 20 F until 6 00AM where it will drop back to the normal calculated temperature of 150 F 38 Heat Timer Corp SQ Elite 8T amp SQ Elite EXT Installation Manual 39 SPECIFICATIONS Voltaselnpute siii Vi Skri e E E oed dai RI SER ed 120 VAC 60 Hz Power Consumption uus s EKKE Ene xcu ede RR Bae Bootes E Gee bP ERS 12 VA Max Operating Temperature 20 F 7 C to 120 F 49 C Operating Humidity auaa aaa Petts book a OR OS ege tho eas 20 to 80 Dimensions Ae ke ick oe ete s m 11 W x 9 Hx 33 4 WEIGH ciperss RIN 2 5 pounds SQ Elite Specifications Lead Stage Rotation Time 1 to 999 Hours 41 days Manual First On First Off SQ Elite 8 Outputs and LEDs 11 N O S P S T 8 Stages 1 System 1 DHW Pump 1 Combustion Air SQ Elite 8 Inputs 1 Sys Temp 1 Outdoor Return Temp DHW Temp Ext Setback Shutdown Prove Stace MOS co umore geen t ide po nta o qe cete OM Ln Auto Standby Off On standby Time PID 1 to 60 minutes Output Built in Relay Ratings 2 Amp inductive Maximum of 1 4 HP at 120 VAC 60 Hz Add On SQ Elite EXT Panels up two SQ Elite EXT Panels using RS485 Temperature Display
8. Combustion Air Damper Output ss 18 External Input Mode 18 Burner Type ego e xm obs 19 Boiler Output 19 Total Boilers 2 fe Ye ke pH TEE 19 Stagingi ts tests oh SE Sim G ten pr he eom 19 SEQUENCE iie ute A e het ke RR AC eS 19 Control LOGIC 22 ams tuoss Jaaman d see aes 20 Sensor Fault pi 202 A 20 Setting the Control to Factory Defaults 20 Operating Settings 21 Program Change Settings 21 Season x joe D gy Yeu b ow Rex 21 21 Customized Reset 21 Set Point Not Adjustable in EMS Mode 22 Outdoor Cutoff Temperature 22 Target Offset 2 5 aa MTA Rx 22 Minimum Target 000 0 ee ee 23 Maximum 23 Boiler Minimum Return 23 Minimum Return llle 23 Return Lag 2 sio JA AR 24 System Settings 24 Program Change 24 Stage Settings 24 24 24 Minimum 24 Standby 25 Last Stage 25 Throttle 25 Lead Settings se ARAM 26 Lead Bol
9. Dry Contact T Stat basi Fon 5 Setback Dry Contact HN m PROVE Dry Contact Prove 12 Heat Timer Corp A WARNING The PROVE input cannot be used as a safety limit All equipment must have its own certified limit and safety controls as required by local codes No boiler stage will start unless the Prove terminals are shorted DO NOT remove the PROVE jumper supplied unless replacing it with a Prove signal WIRING THE SYSTEM OUTPUT TERMINALS 19 20 ZEE e The System output has a Normally Open N O relay that acts as a dry contact It does not source any power Class voltages must enter the enclosure through a different opening from any Class 2 voltage wiring System Output Operation in Set Point Mode In Heating the System output relay will energize whenever the outdoor temperature drops below the Outdoor Cutoff or whenever a stage output is active If no outdoor sensor is connected and the last boiler relay has de energized the System relay will remain energized for a period set by the Run On and then de energize System Ifthe PROVE input is Open the System relay will remain energized however all stages will be de energized Pump If a Prove is not required the factory installed jumper must remain connected for proper operation In Cooling applications the system relay will energize when the outdoor temperature is above the Outdoor Cutoff setting Atypical use of the System output is to activate
10. If you 100 Water Temperature 210 200 190 180 170 160 isp tht ASA A ul ASL AS S Water Temperature in F 130 HESIAK 120 1 7 110 HZ 100 12 70 60 50 40 30 20 10 0 10 20 O Outdoor Temperature in F Reset Ratio is Presented as Outdoor Temp O Water Temp S Ratio Reset Ratio Curves 1 4 1 1 A 7 E N A 4 1 Water Temperature 70 60 50 40 Outdoor Temperature The starting point for most systems is the 1 00 OD 1 00 SYS Outdoor Temperature L 110 Heating Water Temperature ratio This means that for every degree the outdoor E temperature drops the temperature of the heating water will increase one degree The With a 20 Offset the E 100 starting point of the curves is adjustable but comes factory selected at 70 F Outdoor M NER ae si Temp and 100 F Water Temp For example with a 1 00 OD 1 00 SYS ratio if the 20 Offset 4 1 outdoor temperature is 50 F this means the temperature has fallen 20 from the starting 80 KJ point of 70 F Therefore the heating water temperature will increase 20 to 120 F a ia Each building has different heat loss characteristics A very well insulated building will N not lose much heat to the outside air and may need a Reset Ratio of 2 00 OD 1 00 W SYS Outdoor Water This means the outdoor temperature would have to drop 2 g degrees to increase the
11. Setback value That is in Heating the Target will be reduced by the Setback value On the other hand in Cooling the Setback will be added to the Set Point The Setback signal must be a dry contact only No voltage can be placed across the SETBACK terminals Bring the two wires from the dry contact to the SETBACK 35 36 terminals When Setback is selected No Day Night Scheduling will be available WIRING THE PROVE TERMINALS 37 38 The Prove feature is provided to check system component operation before energizing the stages It can be used to check on the Combustion Air Damper by connecting it to the end switch of the damper In this case the Comb Air Output option must be activated from the Startup Menu on page 18 If the Comb Air Damper Output option was not activated the PROVE input can be used to check on the System Output A typical use of this feature is to check for system pump flow before energizing any stage If the PROVE input is open on a call the SQ Elite will enable only the System Output All stage outputs will be off when the 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 Bring the two wires from the dry contact to the PROVE 37 38 terminals No voltage can be placed across the PROVE terminals p PHW 3 Sensor Shiled 1950 Egon Sse 5 cs a5 22 na
12. Shield at the sensor end WIRING THE SENSORS SYSTEM TEMPERATURE SENSOR WIRING TERMINALS 27 28 The SQ Elite is designed to be connected to a temperature sensor HT 904250 00 for immersion in a 3 8ID well HT 350147 00 or 904011 00 located on the common header Contact the factory for additional temperature sensor options Temperature sensor wires can be extended up to 500 by splicing shielded 2 conductor cable Belden 8760 or equivalent 18 2 Temperature sensors have no polarity Connect the two wires from the sensor to the SQ Elite 8T terminals marked SYSTEM TEMP 27 28 e Connect the shield to the circled terminal 28 with one of the sensor wires Do not connect the shield at the Sensor Shiled sensor end OUTDOOR SENSOR WIRING TERMINALS 29 30 T SSN When Outdoor Reset is selected the SQ Elite 8T will vary the system target based on the outdoor temperature 2 e Whether in Set Point or Outdoor Reset modes the outdoor sensor can be used as an Outdoor Cutoff In heating the SQ Elite 8T will disable all Boilers when the outdoor temperature is above the adjustable Outdoor Cutoff temperature However in cooling it will disable the units when the outdoor temperature is below the Outdoor Cutoff This feature will automatically be activated when an outdoor sensor is connected For an outdoor sensor use a Heat Timer outdoor sensor HT 904220 00 e The sensor wires can be extended up to 500 using s
13. Targets and Night Setback Schedule or Setback using an External Signal Furthermore a customizable outdoor reset curve has been incorporated for unique applications where standard reset ratios will not suffice STANDBY UNIT OPTION Any of the SQ Elite 8T heating or cooling units can be configured as a Standby with an adjustable Standby delay Assigning a specific unit to work in standby mode will remove it from the rotation In this mode the unit will be used for backup in large demand periods where the primary units will not suffice SYSTEM AND COMBUSTION AIR DAMPER OUTPUTS WITH PROVE INPUT These outputs work with the control logic to operate a primary system pump and a combustion air damper In addition a System Prove input can be wired in to check the status of either of the components energized by the outputs before the stages can be activated NORMAL LO HI LO HI OR PARALLEL LO LO HI HI SEQUENCING The SQ Elite can sequence heating or cooling units as needed For heating systems where higher efficiency is achieved using lower firing stages the SQ Elite offers the Parallel Sequencing option It sequences all the low firing stages first before bringing the rest of the stages on For other types of heating and cooling units using the Normal Sequencing option brings the lower operating stage followed by the higher one of the lead unit That will be repeated for each of the lag units MULTIPLE OR SINGLE STAGING Unlike many boilers where to
14. Timed Rotation This option automatically rotates the units every selected period from one hour to every 41 days 999 hours SETBACK BOOST OR DAY NIGHT SCHEDULING Two Setback modes are available for the SQ Elite Each of the SQ Elite and SQ Elite EXT consists of three primary enclosure components The Day Night Scheduling provides an adjustable time based schedule for the Setback It will be available when Shutdown or Tstat is selected from the External Input Startup menu options See page 18 When Setback is selected from the External Input Startup menu options an external signal can be used to switch the operation of the SQ Elite 8T in and out of setback mode See page 18 The Boost can be used to bring the building to comfortable temperature settings after a Night or Setback period It does that by increasing the target temperature in heating or decreasing it in cooling application for an adjustable period that follows the setback Enclosure Display Module INSTALLATION The Enclosure Display Module contains the display buttons LEDs and electric wiring terminals It has two screws to hold it to the base A program configuration switch used to adjust SQ Elite settings is placed above the terminals This switch is enclosed with the Enclosure Wiring Cover for security The wiring terminals are of the plug in type to ease installation and removal The Enclosure Base contains the holes to mount and hold the control against the wal
15. slow and requires a long period to achieve or measure the results However OSS can be used for applications where the load changes frequently and the sequencing must match the load and its immediate change NUMBER OF STAGES e The SQ Elite can be configured to control up to eight stages It can control up to 24 stages using a maximum of two SQ Elite EXT Extension Panels each with eight stages STAGE PUMPS OR VALVES e The SQ Elite 8T can control multiple stages in addition to unit pumps or valves CONTROL DHW PUMP AND COMBUSTION AIR DAMPER control of the DHW is based on either a temperature sensor can be purchased separately on the DHW source or using a dry contact from an aquastat The SQ Elite 8T provides multiple DHW Priority options based on the DHW piping The Combustion Air Damper output can be used in conjunction with the PROVE input to check the status of the Combustion Air Damper s End Switch System Pump s Flow Switch or any other operating device before any stage is energized MONITOR BOILER RETURN The optional return line sensor can be purchased separately can be connected in heating applications to monitor and help protect the boilers from thermal shock and condensation caused by cool returns 8 Heat Timer Corp AUTOMATIC ROTATION AMONG BOILERS Rotating the lead unit to be activated on a call for output promotes even wear on all units The SQ Elite has three modes of rotation Manual First On First Off or
16. when in Summer or Outdoor Cutoff a DHW call will energize only the DHW Pump relay leaving the System relay off In Winter if the DHW Priority Timer was set to a value other than NO DHW call when the outdoor temperature is below the Outdoor Cutoff will cause the System relay to de energize and the DHW Pump relay to energize for the period of the DHW Priority Timer or until the DHW call expertise whichever happens sooner If the DHW call did not expire within the Priority period then the System relay will energize DHW SET POINT REQUIRES AN OPTIONAL DHW TEMPERATURE SENSOR Adjustable 100 F 38 C to 200 F 93 C Default 120 F 49 C Hold Button MENU lt System Settings gt lt DHW Settings gt DHW Set Point This is the desired DHW temperature setting at which the DHW Pump relay will de energize when reached e The SQ Elite 8T can accept a DHW call in two ways An aquastat can provide a dry contact closure to terminals 33 and 34 is the first option SQ Elite 8T amp SQ Elite EXT Installation Manual 29 e The second option will be connecting a Heat Timer temperature sensor HT 904250 00 for immersion in a 3 8ID well HT 350147 00 or 904011 00 will offer the capability of adjusting the DHW Set Point and Differential through the SQ Elite 8T easy to follow menu See page 29 In addition to being able to view and log DHW temperature history DHW DIFFERENTIAL Adjustable 5 F 3 C to 80 F 44 C Default 10 F 6 C Hold Butt
17. A boiler with low water content will need a longer Run On than a boiler with more water content PUMP EXERCISE Adjustable Off On Default Off Hold Button MENU lt System Settings gt Pump Exercise The SQ Elite 8T provides an option to exercise pumps for 10 seconds when not used for seven days This option reduces pumps impellers locking after a long off season period 30 Heat Timer Corp MAINTENANCE Hold Button MENU lt Maintenance gt The Maintenance menu gives access to sensor and output trimmings in addition to viewing the Startup configuration settings as well as sensor History A ALERT To be able to change the SQ Elite settings the Program Run Switch must be set to Program The switch is located under the Enclosure Wiring Cover for security The Enclosure Wiring Cover can be securely closed using a padlock SYSTEM amp OUTDOOR SENSOR TRIM Adjustable 20 F 10 C to 20 F 10 C Default 0 F Hold Button MENU lt Maintenance gt System Trim Hold Button MENU lt Maintenance gt Outdoor Trim Hold Button MENU lt Maintenance gt Return Trim Hold Button MENU lt Maintenance gt DHW Trim The Heat Timer thermistor type sensors are very accurate and normally require no calibration However sometimes it may be desirable to make small adjustments to the displayed value Do not use the Trim setting to make the Outdoor sensor match the one reported on the radio or TV Outdoor temperature can vary wid
18. Elite 8T will only sequence boilers with a Mode set to Auto or Standby Check to if any boiler stage is set to On 39 14985 e Control Settings The Last Stage Hold will allow only the Lead boiler to exceed the set point 20 13040 If the setting is too high and only the Lead boiler is on the system can over heat Reduce the 45 11374 Last Stage Hold setting This will mostly occur in mild weather 50 9944 55 8714 Too Little Heat 60 7653 Check if the control has any of the following conditions 5941 e Reset Ratio and Offset If reduced heat occurs only in certain weather conditions adjust the Reset Ratio and Offset See Understanding Operating Concept on page 5 If reduced heat Enid occurs year round increase the Offset 3667 Setback and Day Night Schedule If reduced heat occurs only during specific hours check 2914 the Day Night Schedule and the Setback Boost and Boost Period values Either reduce the 2332 Setback or Boost settings or change the Day and Night Schedules 1879 e Boiler Mode Settings The SQ Elite 8T will only modulate boilers their mode is set to Auto 1524 or Standby Check if any boiler stage is set to Manual Off or Standby mus Units are Short Cycling 1021 Minimum Runtime Increase the Minimum Runtime only if all units tend to short cycle 842 e Last Stage Hold Increase the Last Stage Hold only if the lead unit tends to short cycle 699 583 System is Overshooting or Undershooting e Reaction Tim
19. HEAT TIMER e INSTALLATION AND OPERATION INSTRUCTIONS MANUAL e USER OPERATIONS MANUAL SQ Elite 8T amp SQ Elite EXT HYDRONIC SEQUENCING CONTROL FOR HYDRONIC SYSTEMS STAGE l Co O a R p opper Conductors O PROGRA OR OLD SER DHW MB Al Stage A Stage B Stage C Stage D e Stage F Stage GlStage HBYSTEM pump H SAE ies pares yos 4 6 8 9 10 4 6 8 19 20 26 S S S S SISISISISIS SISHISISISISIS IS S SIS S S S SI S SISISISIS S S S SIS S WARNING The SQ Elite is strictly an operating control It CANNOT be used as a limit control All boilers must have all safety and limit controls required by code It is the responsibility of the installer to verify that all the safety and limits are working properly before the SQ Elite is installed This control must be installed by a licensed electrician Contents 2 Heat Timer Corp SQ ELITE 8T LAYOUT 3 SQ ELITE 8T OVERVIEW 4 UNDERSTANDING OPERATION CONCEPT 5 Reset Ratio Outdoor Reset 5 PID Operation s s x SS OR ebook hy 6 OSS Operation 6 Make Sure You Have the Right Control 7 INITIAL SETUP mom UE GIGS Tes 7 Selecting the System Features 7 INSTALLATION
20. LD Adjustable from 0 F 0 C to 30 F 17 C Default 5 F 3 C Hold Button MENU lt System Settings gt lt Stage Settings gt Lst Stg Hid in PID Logic only e The Last Stage Hold prevents short cycling of the Lead Stage during low load conditions where the system might have a load that is significantly less than the output of one stage When the SQ Elite 8T brings on the Lead Stage the Set Point is quickly exceeded and the Lead Stage is turned off To prolong the run time during this type of condition use the Last Stage Hold setting In heating the SQ Elite 8T will allow the system temperature to exceed the Set Point by the number of degrees selected before the Lead Stage is turned off In cooling the SQ Elite 8T will allow the system temperature to rise above the Set Point by the number of degrees selected before the Lead Stage is turned off See PID operation on page 6 e For example with a Set Point of 160 F and a Last Stage Hold setting of 10 F the Lead Stage boiler will remain on until the Set Point reaches 170 F During that period the display will show iisi Lf i d then the lead stage will turn off THROTTLE RANGE Adjustable from 2 F 1 C to 20 F 11 C Default 2 F 1 C Hold Button MENU lt System Settings gt lt Stage Settings gt Throttle in OSS Logic only The Throttling Range sets a temperature band around the Set Point that controls when stages will be turned on or off For example in the OSS Control
21. Mode no stages will be activated until the temperature falls one full Throttling Range below the Set Point A second stage will be activated when the temperature falls to two full Throttling Ranges below the Set Point and so on with one extra stage being turned on for every throttling range below the Set Point the System temperature reaches e Stages will be turned off as the temperature rises toward the Set Point using one full throttling range as a differential between stages The last stage to be turned off will be allowed to exceed the Set Point by a full throttling range before it is turned off This helps to prevent the last stage from short cycling when the load is low or when the stage is oversized See OSS operation on page 6 Throttling Example in Heating Mode Set Point 180 F Throttling 5 F 4 Boiler Stages B C and D tese A nor ten oo 9 omm 07 mor won B Le F ee Er ume 2 seer ew 26 Heat Timer Corp LEAD SETTINGS Hold Button MENU lt System Settings gt lt Stage Settings gt lt Lead Settings gt The lead menu is to help in selecting the Lead unit and the type of rotation appropriate for the system LEAD BOILER No Pump or Valve stages Depending on the number of stages Default The first set of stages xs Hold Button MENU System Settings gt lt Stage Settings gt lt Lead Setting gt Rotate Mode e The Lead Unit s lowest st
22. NSOR TERMINALS 33 34 The DHW input can be used to raise system Set Point to 200 F or Maximum Target whichever is lower The DHW Piping on page 18 must be selected from the Startup Menu to determine the DHW Priority options DHW Call terminals can be connected to either a dry contact or a temperature sensor that can be purchased separately HT 904250 00 for immersion in a 3 8ID well HT 350147 00 or 904011 00 If using a dry contact wire an aquastat or other controls to provide dry contact closure on the DHW terminals If using a sensor the sensor wires can be extended up to 500 using shielded 2 conductor cable Belden 8760 or equivalent 18 2 Temperature sensors have no polarity Connect the wires from the DHW sensor to the SQ Elite 8T terminals marked DHW 33 34 Connect the sensor shield to the circled terminal 34 with one of the sensor wires Do not connect the shield to the sensor If Shutdown was selected as the External Input any DHW call will be ignored when the Shutdown is active WIRING THE SHUTDOWN TERMINALS 35 36 This feature will only be available when Shutdown is selected as the External Input Mode option from the Startup menu on page 18 This feature can be used whenever it is desirable to turn off the SQ Elite 8T stage outputs from a remote location or another controller i e EMS input When the Shutdown is enabled all active stages will immediately turn off The System Pump Combustion Air and unit pump
23. R Mode The SQ Elite 8T only controls any unit set to Auto or after a delay those set to Standby e Any output without an active unit connected must be set to Off The following list describes the MODE options Auto The SQ Elite will control the unit s operation to maintain the desired Set Point Only units set to Auto can be lead unit Standby These units can only be activated when all units in Auto have been at HI for an adjustable Standby delay period Standby units are generally used as a backup in extreme load conditions Note that a Standby unit cannot be a lead unit Standby Delay is only available in PID mode Off Any output unit not connected to a physical unit should be set to Off The Off Mode can also be used to disable units that are being serviced On The On Mode should only be used when testing a unit The On Mode overrides the PROVE and SHUTDOWN inputs Once set to On the unit will immediately start all of its stages RUNTIME Clear Button BOILER RunTime The RunTime provides an accumulative hourly run for the selected unit e The RunTime for a specific unit can be reset to zero by pressing the middle two buttons SQ Elite 8T amp SQ Elite EXT Installation Manual 33 TROUBLESHOOTING TEMPERATURE INPUTS Display shows Sensor OPEN Check the sensor is connected and the wires are continuous to the SQ Elite 8T Finally follow the procedure for Incorrect Temperature Display Display shows Sensor SHORT The
24. S EE SY Ped entes dere d iode ae ola 0 to 60 minutes Pup Exercis uus d s X But Pa te d celis Ma PE maat toS Fou uxo Oe dus Yes or No S hedilesi loi srl eR E Oe Oh dT AE pde She ee d 1 Day and 1 Night Setback settings per day Night setback s 246 eue ue man hah eae eub eee 0 F 0 C to 80 F 44 C Power Backup Lithium coin battery 100 days minimum 5 year replacement Maintains Clock in power outages External Inputs 33518 ene qe seda Shutdown Input and Prove Input Dry Contacts Only uU Dac Winter and Summer SQ Elite EXT Specifications Extension Numbering 21 25 5230 5 ere SO EO ERO d fed ded deb me Toggle Switch A or B LED 1 Power Dual Color Green A Red B 1 Communication 8 Stage Output relays Dual Color Green A Red B Stage OUTDUIS poso ilo etc eara ARIETE RR 3 viss e 8 N O S P S T Output Built in Relay Ratings 2 Amp inductive Maximum of 1 4 HP at 120 VAC 60 Hz Connection to SQ Elite and another SQ Elite EXT Two RS485 Fairf 7004 973 575 4004 73 575 4 20 New Dutch Lane Fairfield NJ 07004 973 575 4004 Fax 973 575 4052 http www heat timer com 059063 00 Rev B
25. SQ Elite 8T sees a short across the input terminals Remove the wires from the the sensor terminals The display should change to read OPEN If it doesn t the SQ Elite 8T may be damaged Display shows an Incorrect Temperature Display Remove the wires from the sensor terminals The display should change to read OPEN If it doesn t the SQ Elite 8T may be damaged Take an ohm reading across the detached sensor wires Take an ohm reading across the detached sensor wires The ohm reading should correspond to the Temperature sensor Table If it does not the sensor may be damaged Return Sensor does not Display Temperature Temperature Sensor Chart Check the sensor is connected and the wires are continuous to the SQ Elite 8T Finally follow TEMPERATURE Value the procedure for Incorrect temperature display in Degrees F in Ohms 30 117720 CONTROL OPERATION n Too Much Heat Check if the control has any of the following conditions 390 6 e Domestic Hot Water call The SO Elite 8T will raise the temperature of the system to either 0 42683 200 F or Maximum Target on a DHW call 10 31215 e Reset Ratio and Offset If excessive heat occurs only in certain weather conditions adjust 20 23089 the Reset Ratio and Offset See Understanding Operating Concept on page 5 If excessive 25 19939 heat occurs year round reduce the Offset 30 17264 e Unit Mode Settings The SQ
26. SQ Elite EXT Installation Manual 9 NSTALL TH E S ENSO RS Immersion Heating System Sensor Immersion Well Common Supply Pipe 3 8 ID 1 2 NPT eee SYSTEM SENSOR INSTALLATION LOCATING THE SYSTEM SENSOR Shield Put the System sensor approximately 10 feet past the last heating cooling unit E J on the common supply header but before any takeoffs e The sensor must be located where it sees the output of all the stages If a unit is piped so that the sensor does not see its output the SO Elite 8T will not seguence the units correctly e Only use a Standard Brass Tube sensor HTC 904250 00 e The sensor wires can be extended up to 500 using a shielded 2 conductor cable Belden 8760 or equivalent 18 2 Do not ground the shield at the sensor but at the panel using one of the terminals marked with an O s Heating System Sensor Sensor Probe Strap On Heating System Sensor Common Supply Pipe Pipe Insulation Do not run sensor wires in conduit with line voltage wiring IMMERSION HEATING SYSTEM SENSOR HSS INSTALLATION j nstall a 3 8 ID immersion well HT 350147 00 or 904011 00 nsert the sensor probe of the supplied sensor into the well Sensor Probe ALERT STRAP ON HEATING SYSTEM SENSOR HSS INSTALLATION If the System Sensor can not sense the Strap the sensor to the pipe using metal clamps Do not over tighten the correct system w
27. Set Point The Message Display Line will not display any season information Ifthe control was set to Cooling the SQ Elite 8T will turn on the cooling units when it is set to Summer However when it is set to Winter The Message Display Line will read to show status 36 Heat Timer Corp SET POINT NOT ADJUSTABLE IN EMS MODE Adjustable 10 F 23 C 230 F 110 C Default 70 F 21 C Button MENU Set Point In Set Point or EMS 4 20mA e Set point is the temperature value the SQ Elite 8T will use to control the system e The SQ Elite 8T will add subtract or hold the stages of the heating or cooling units to maintain the system temperature around the Set point e system temperature can be expected to fluctuate around the set point The amount of fluctuation depends on the System Settings and Stage Settings Ifthe EMS Mode was Enabled the Set Point will be set by the EMS BMS system and will be available to be only read e The range of Set Point in the EMS is set in the Startup menu at 4mA and 20mA Any reading below the 2mA or above 22mA will indicate a E 5 message on the Message Line RESET RATIO Custom 1 8 00 OD 1 00 Sys to 12 4 00 OD 1 00 Sys Default 1 1 00 OD 1 00 Sys Button MENU Outdoor Reset Reset Ratio In Outdoor Reset Only e The Reset Ratio applies only to Heating applications e The Reset Ratio determines how the System water temperature will vary with the outside t
28. Setting the System Startup e Setting the System Settings e Setting the Stages e Adjusting Reset Ratio and Water Offset In Reset Mode Only SELECTING THE SYSTEM FEATURES The SQ Elite 8T has been designed with Hydronic heating and cooling as the primary purpose With this in mind many of the SQ Elite 8T features can be utilized to ease enhance and improve your system performance Some of these features are listed in this section HEATING OR COOLING WITH MULTIPLE OR SINGLE OUTPUT AT A TIME e The SQ Elite 8T is equipped to control multiple multi stage boilers or chillers with or without pumps or valves for heating or cooling application e That combined with the capability of energizing only a single stage of a multi stage cooling unit when in high demand makes the SQ Hlite 8T versatile for many industries OUTDOOR RESET SET POINT OR EXTERNAL 4 20MA SET POINT e The SQ Elite 8T can control the System Temperature either by adjusting the target according to the Outdoor Temperature Outdoor Reset or by maintaining an adjustable Set Point The Outdoor Reset option available in heating only uses an Outdoor Sensor supplied with the control and achieves better fuel savings in addition to better comfort Using the optional 4 20mA EMS Interface HTC 926741 00 the SQ Elite 8T can receive an external set point through an EMS system PID OR OSS CONTROL LOGIC The SQ Elite PID can be used for applications where system reaction is
29. Settings System Settings Stage Settings Throttle SENSOR FAULT Stages On Stages Off Default Stages On Hold Button MENU System Startup gt Sensor Fault e The Sensor Fault will determine the operating status of all output stages set to Auto or Standby when a sensor reads Short or Open e The Shutdown or Tstat activation will take precedence over the Sensor Fault status That means if Stages On is selected and the Shutdown was active all stages will be Off on a sensor fault RESET MODE e When Stages On is selected the SQ Elite 8T will turn all unit stages On the System reads t or Deer and the Outdoor is below the Outdoor Cutoff When the Outdoor reads i OF i the SQ Elite 8T will change the Target to the Maximum Target e When Stages Off is selected the SQ Elite 8T will turn all stages Off when the System reads t ort when the Outdoor reads Short or Open the SQ Elite 8T will change the Target to the Minimum Target SET POINT MODE e When Stages On is selected the SQ Elite 8T will turn all stages On when the System sensor reads e When Stages Off is selected the SQ Elite 8T will turn all stages Off when the System sensor reads e Outdoor Sensor Short or Open status will not affect the control operation in Set Point mode SETTING THE CONTROL TO FACTORY SETA IS To Reset the SO Elite control to its original factory defaults power down the control Hold down the two right most buttons while powering the control
30. Type e The SQ Elite can sequence from a single stage and up to four stages per heating or cooling unit Select the option based on your boiler or cooling number of stages BOILER OUTPUT None Pump Valve Default None Hold Button MENU lt System Startup gt Boiler Output e When None is selected the SQ Elite 8T will sequence multiple heating or cooling units without any additional unit pumps or valves e The Pump option allows the SQ Elite 8T to control the cooling or heating unit stages in addition to the unit pumps The pump stage will run for the Run On delay after the lower stage of that unit has de energized The Valve option functions similar to the pump option except that when all stages are off and after the Run On delay has elapsed the Lead unit s valve relay will remain energized to allow for pump flow across the system The lead unit s valve will remain energized until the Outdoor temperature rises above the Outdoor Cutoff or when the Shutdown or Summer is activated TOTAL BOILERS from 1 to 24 Default varies based on Burner Type and Boiler Output Hold Button MENU lt System Startup gt Boiler Output This option in combination with Burner Type and Boiler Output Startup options will determine the total number of outputs the SQ Elite will need to control Ifthe total number of stages selected including unit pumps or valves is more than the control and extension stages the additional units containing these s
31. a manually adjusted Set Point in either heating or cooling In Outdoor Reset the SQ Elite 8T controls a hot water heating system to provide a building with comfortable and even heat levels The SQ Elite varies the Target temperature of the circulating heating water in response to changes in the outdoor temperature The SQ Elite 8T also controls the system circulating pump with an adjustable Outdoor Cutoff In heating when the outdoor temperature is above the Outdoor Cutoff the System Pump will be off and no heating water is circulated through the system When the outdoor temperature drops below the Outdoor Cutoff the system pump relay is energized and the heating water starts to circulate through the system The temperature of the heating water is controlled by the Reset Ratio parameters or the Set Point In cooling applications the SQ Eite 8T turns off the cooling units and System Pump when the outdoor temperature rises above the Outdoor Cutoff setting RESET RATIO OUTDOOR RESET When a building is being heated heat escapes through the walls doors and windows to can input heat into the building at the same rate that it is lost out of the building then the building temperatures will remain constant The Reset Ratio is an adjustment that lets you achieve this equilibrium between heat input and heat loss With a 0 Offset the ratio curves begin at the colder outside air The colder the outside temperature the more heat escapes
32. a system pump or its starter The pump can run whenever there is a call for heat cool When stages are no longer required the pump will stay active for an adjustable Run On delay and then de energize System Output Operation in Reset Mode e The System output relay will energize whenever the outdoor temperature is below the Outdoor Cutoff e When the outdoor temperature rises 2 F above the Outdoor Cutoff the System output will remain energized for the period set by the System Run On and then de energize WIRING THE DHW PUMP TERMINALS 24 22 The SQ Elite 8T can control the DHW Pump when the DHW Pump Output option is activated from the Startup Menu See page 18 The SQ Elite 8T will energize the DHW Pump whenever there is a call for DHW using a dry contact or when the DHW temperature falls below the DHW Set Point and DHW Differential when using a DHW sensor The DHW Pump output relay is a Normally Open N O dry contact It does not source any power e Class 1 voltages must enter the enclosure through a different opening from any Class 2 voltage wiring e If Shutdown was selected as the External Input page 18 The Sq Elite 8T will ignore a DHW call when the Shutdown is active WIRING THE COMBUSTION AIR DAMPER TERMINALS 23 24 The SQ Hlite 8T can control the Combustion Air Damper when the Comb Air Output option is activated in the Startup Menu Page 18 In addition the PROVE input will function as the Combustion Air Damper
33. age will always be the first stage brought on when there is a call for output As more output is needed additional stages are added The Lead Unit is always shown on the main display in brackets e Ina2 Stage system see Burner Type in the Startup section on page 19 the display will show the two Lead Unit stages bracketed AB In a 3 Stage system the display will show the three Lead Unit stages bracketed lt ABC gt and so on With Pump fapump or a valve is selected as the Boiler Output in the Startup menu see page 19 the pump or valve letter will be skipped from the number os stages See example to the right The missing stage C and F represent the Unit Valve or Pump e The Lead Unit can be rotated based on the Rotation Mode selected See next setting or Valve stages ROTATE MODE Adjustable Time from 1 hr to 999 hrs Manual FOFO Default Time 24Hours Hold Button MENU lt System Settings gt lt Stage Settings gt lt Lead Setting gt Rotate Mode e The Lead Unit is the first unit brought on when output is required e The Lead Unit can be rotated automatically manually or based on First On First Off FOFO The automatic rotation is recommended for most applications e The current Lead Unit is shown in brackets on the main display Only units that are set to Auto Mode can be Lead Therefore not all the units may be available when manually selecting a new Lead Unit e If Time is selected a second screen wi
34. arget temperature the SQ Elite 8T will calculate for the heating system When using in floor radiant system it should be set according to the tubing or floor manufacturer s specification e The Maximum Target must be at least 20 F higher than the Minimum Target See previous setting BOILER MINIMUM RETURN When a return sensor is connected to the SQ Elite 8T it will monitor and control the boiler return when in Heating mode It does that by monitoring the Target temperature TGT System temperature SYS Minimum Return and actual return RTN When the SQ Elite 8T foresees that a low return will occur it will increase the Target automatically as an effort to increase the return temperature See Return Sensor Wiring on page 10 MINIMUM RETURN Adjustable Off from 80 F 27 C to 140 F 60 C Default 120 F 49 C Hold Button MENU Min Return in Heating only The Minimum Return is the critical temperature at which the return should be above Normally this setting is provided by the boiler manufacturer or the system engineer e The SQ Elite 8T will use that value as a guide It will start to add xcd e if it that the RTN temperature will drop below the Min Return During that period it will display i in the Display Message Line to indicate that the SQ Elite 8T is sequencing boilers to protect the return ion dui below the Minimum Return Most condensing boilers will run more efficient with cooler return temperature
35. ater temperature being clamp The sensors s concave surface must be facing the pipe for better supplied to the building the SQ Elite temperature reading will not provide comfortable heat cool Strap pipe insulation around the sensor and pipe levels Be sure that it is located on the main supply pipe which can not easily be isolated from the system OUTDOOR SENSOR INSTALLATION Only use the Heat Timer sensor included with the unit HT 904220 00 Outdoor Sensor Locate the sensor in the shade on the north side of the building The sensor should never be in direct sunlight Seal around __ E i sensor and wall e Be sure the location is away from doors windows exhaust fans vents or other possible heat sources Outdoor The sensor should be mounted approximately 10 feet above ground level Li e Adhere the Outdoor Label provided to the back of the sensor base location e Use the Enclosure Base bottom knockout for the conduit Use the locknut to MOLO OY en hold the conduit and enclosure base together Screw the cover to the base location If screws are used to affix the enclosure to the wall make sure to seal around the sensor and wall except from the bottom Siel The sensor wires can be extended up to 500 using shielded 2 conductor cable n not connected 18 2 Do not ground the shield at the sensor but at the control using the t
36. back up until the i i i screen appears The Display will direct you to the Startup menu to program the control after the defaults are loaded Fi However NOTE When resetting the control to original factory defaults all control settings will be overwritten and will no longer exist ALERT Do not turn off power to control until all Startup settings have been made Otherwise the next power up will be set to many Startup factory settings that might not fit your application SQ Elite 8T amp SQ Elite EXT Installation Manual 21 OPERATING SETTINGS PROGRAM CHANGE SETTINGS To be able to change the SQ Elite settings the Program Run Switch must be set to Program PROGRAM mi RUN The switch is located under the Enclosure Wiring Cover for security The Enclosure Wiring Cover can be securely closed using a padlock SEASON A ALERT Winter Summer Default Winter DO NOT turn power off to Button MENU Season the SQ Elite 8T when in In Heating Mode the SQ Elite 8T will turn all boiler relays off when it is in Summer off season If you do so the setting The Message Display Line will read to show status However a battery will run down and DHW call will bring the boilers back on if needed When in Winter the SQ Elite 8T have to be replaced Instead will activate the System relay whenever the Outdoor temperature falls to or below switch to Summer or Winter the Outdoor Cutoff setting In addition it will begi
37. d setting must be accounted for The boiler limit must be set above the Set Point PLUS the Last Stage Hold PLUS the normal drop experienced in the piping Using the previous example of a 10 F Last Stage Hold with a 160 F Set Point the boilers limits must be set enough over 170 F to prevent the boilers internal limits being reached In this situation the boiler high limit should be set at approximately 180 F to prevent the difference in boiler temperature vs header temperature from causing erratic operation The SQ Elite has two levels of heat or cool The Day level is used when a building is occupied and people are active The Night Setback level is used when a building is not occupied or when people are sleeping This setting reduces the calculated temperature in Heating and increase it in Cooling by the Setback setting based on the provided schedule In Heating if the Day calculated water temperature was 150 F and the Setback was 20 F the Night Schedule will run at 150 F 20 F 130 F If the Boost feature is being used it uses the Day Schedule as a Boost ending point That is if the Day Schedule is set to start at 6 00AM the Boost was set to 10 F and the Boost Period was 30 minutes the Boost will start at 5 30AM Then when in Boost SQ Elite 8T will raise the calculated water temperature by the Boost amount Using the previous example at 5 30AM the SQ Elite 8T will raise the calculated water to 170 F 150 F 20 F u
38. dby e MLO Unit Middle Low stage is active Available in Four stage units only The unit Mode is set to either Auto or Standby LO Unit Lowest stage is active The unit Mode is set to either Auto or Standby e ON All Unit Stages are set to ON e OFF All Unit Stages are set to OFF or unit does not exist e C E Unit on Extension panel is not communicating back to the SQ Elite 8T ein Unit Pumps are being controlled by the SO Elite 8T e x Unit Valves are being controlled by the SO Elite 8T DISPLAY MESSAGES The SO Elite 8T normal display layout reserved the second line for message indications The following is a list of the most common Message Display Line information Summer The control is set to Summer No heat is active Winter The control is set to Winter No cooling is active Outdoor Cutoff The Outdoor temperature is above the Outdoor Cutoff in heating or below it in cooling Shutdown Active The Shutdown Terminals are Shorted No heating or cooling units will be active Shutdown by EMS The EMS is below 2mA or above 22mA DHW Call 171 There is a DHW Domestic Hot Water call The SQ Elite 8T will Raise system Set Point to the indicated temperature DHW increases calculated temperature to 200 F or Max Water Temperature whichever is lower Holding Return at 110 F Return sensor is reading less than the Minimum Return SQ Elite 8T is trying to raise return to 110 F Holding Until 150 F The Lead boiler is in La
39. ds when the building is not occupied but output is still required The new Set Point will appear on the main display indicating this condition e For example if in heating the calculated temperature is 180 F and the Setback i is 20 F ion in Setback the SQ Elite 8T will hold a Set Point of 160 F 180 F 20 F e After selecting a value in Setback you will be directed to the Boost menu BOOST Adjustable from 0 F 0 C to 80 F 44 C Default 0 F 0 C Hold Button MENU lt System Settings gt Setback Boost BOOST PERIOD Adjustable from 0 to 120 minutes Default 30 minutes Hold Button MENU lt System Settings gt Setback Boost Boost Period Avoiding Conflicting Boiler Limits DAY NIGHT SCHEDULES Hold Button MENU lt System Settings gt lt Setback Schedule gt Day Schedules SQ Elite 8T amp SQ Elite EXT Installation Manual 27 This features allows a building to either warm up or cool down quickly after a Setback period to bring the building to the desired temperature faster The Boost temperature will be the number of degrees to be added in Heating or poc Eom the Target The new Set Point will appear on the main display indicating this condition i Using the previous example if the Target was 180 F and the Setback was 20 F si the Boost was 10 F for 30 minutes after the setback period the Boost will change the target to 190 F for a period of 30 minutes This will determine the length of
40. e Enclosure Wiring Cover can be securely closed using a padlock STARTUP SEQUENCE Hold Button MENU lt System Startup gt When powered the SQ Elite performs a self test on its components After the self test diagnostics have been successfully completed the SQ Elite will initialize the panel On the first power up the System Startup screen will appear after the initialization is complete If it doesn t the SQ Elite has already been configured e The System Startup menu sets the main parameters as the type of sensor the type of output whether heating or cooling the sequencing mode and many other parameters described in this section Before entering the Startup menu several warnings will alert you to the consequences of making Startup changes CONTROL MODE Outdoor Reset Set Point EMS 4 20mA Default Outdoor Reset Hold Button MENU lt System Startup gt Control Mode e Outdoor Reset provides a variable set point based on outdoor temperature Available for Heating applications only Outdoor Reset mode requires the use of an outdoor sensor DO NOT select Outdoor Reset without an outdoor sensor e Set Point mode does not require an outdoor sensor If an outdoor sensor is connected in Set Point mode it will be used only as an Outdoor Cutoff point That is to turn the stages system and Comb Air relays off The EMS 4 20mA allows the SQ Elite 8T to receive an external set point from an EMS BMS system This optio
41. e Offset should be 175 F However it will not E m exceed 170 F due to the Maximum Target setting 510 Ifrequired Adjust the Water Offset in mild weather If the ambient building S temperatures are too warm in the mild weather decrease the Target Offset If the 100 70 60 50 40 30 20 10 0 10 2 ambient building temperatures are too cold in the mild weather increase the Target Outdoor Temperature in F Offset The rule of thumb for baseboard radiation is to change the Offset 4 F for every Target Offset 1 F you wish to change the building temperatures In radiant heat applications change the Offset 1 F or 2 F for every 1 F you wish to change the building temperature MINIMUM TARGET Adjustable from 70 F 21 C to 180 F 82 C Default 80 F 27 C Hold Button MENU lt Outdoor Reset gt Min Target in Outdoor Reset only e The Minimum Target must be set to the boiler manufacturer s specification The SQ Elite 8T will calculate the Set Point based on the Outdoor temperature the Reset Ratio and the Offset value The SQ Elite 8T will control all boilers to hold either the Set Point temperature or the Minimum Target whichever is higher e The Minimum Target must be at least 20 F lower than the Maximum Target See next setting MAXIMUM TARGET Adjustable from 90 F 32 C to 240 F 116 C Default 240 F 116 C Hold Button MENU lt Outdoor Reset gt Max Target in Outdoor Reset only This is the highest T
42. e and Minimum Runtime If the system is overshooting or undershooting adjust Minimum Runtime or the Reaction Time That depends on if the stages are brought on fast and were not allowed to turn off until the Minimum Runtime elapsed Or the stages were brought on slowly however were allowed to turn off quickly e PID vs OSS If the application the system is used on requires fast response that the normal PID mode cannot provide try using the OSS mode and adjust the Throttle Range according to the system requirements 34 Heat Timer Corp MULTIPLE BOILERS WITH PUMPS PIPING WIRING DIAGRAMS Outdoor Sensor The SQ Elite sequencing 4 single stage boilers and their boiler pumps The boilers are piped in Reverse Return on the primary loop The System output is controlling the System Pump N ll O R e e Conductors PRocRAM E R SYSTEM RS485 DHW COMB PRESS TEMP TEMP temp PHW PROVE 26 E30 il __ TESE E a P SISISISISISISIS IS S S SHS SISISISIS SIS S S B s Heat Timer Corp is aware that each J 89 88 5 installation is unique Thus Heat L 3 que Thus Heat Uniti Unit2 Unit3 Unit 5 55 65 Timer Corp is not responsible for any z
43. e is above the Outdoor Cutoff both the DHW Pump and the System relays will energize Upon the termination of the DHW call the DHW Pump relay will de energize leaving the System relay energized for the Run On delay f Parallel was selected as the DHW Piping from the Startup menu on page 18 and the Season was set to Winter while the DHW Priority Timer was set to NO a DHW call will keep the System relay energized in addition to energizing the DHW Pump relay Upon termination of the DHW call the DHW Pump relay will de energize leaving the System relay on e However in Winter if the DHW Priority Timer was set to a value other than NO a DHW call will de energize the System relay and energize the DHW Pump relay This will remain for the period of the DHW Priority Timer setting or until the DHW call terminates whichever is sooner If the DHW call was still active after the DHW Priority Timer elapses the System relay will energize for the remaining of the DHW call period DHW PRIORITY TIMER AVAILABLE WITH PARALLEL DHW PIPING Adjustable NO 1 to 120 minutes Default No Hold Button MENU lt System Settings gt lt DHW Settings gt DHW Prior Timer in Parallel The DHW Priority Timer is only available when DHW Piping is set to Parallel See page 18 It provides the user with the capability of selecting the DHW Priority period If NO was selected a DHW call will energize the DHW pump relay without affecting the System Pump operation That is
44. ely over a broadcast range HISTORY Hold Button MENU lt Histories gt The SQ Hlite 8T provides users with a graphical history of the System Outdoor DHW and Return sensors for the previous 24 hours The temperatures are sampled every 12 minutes That is readings of temperatures are recorded and stored every 12 minutes for the last 24 hours e To view the values of a specific period use the two middle buttons to scroll to that time and read the upper left temperature The first screen will be the System Temperature History By clicking on the Next button you will be able to view the Outdoor Temperature History then the Return History followed by the DHW History CONFIGURATION Hold Button MENU Maintenance Configuration e This menu provides a consolidated view of the Startup settings e Additional control settings will be available by selecting the NEXT option DISPLAY AND BUTTONS The SQ Elite display layout provides a variety of information that gives an immediate picture of the operation status The display shows four heating or cooling units at a time The two middle buttons scrolls the screen to view any additional units Moreover all the information is brightly displayed It can be viewed in brightly or dimly lit rooms e The buttons functionality changes based on the screen and menu level The buttons functionality is displayed on a dark background on the screen s bottom line e second li
45. em temperature rises towards the set point stages will turn off Using the previous example when the system rise to 175 F boiler B will de energize leaving only boiler A on Boiler A will remain on until the system rises a one full Throttle range above the set point This will leave the lead boiler A on until the temperature rises to 185 F then turn off de energize Throttling Example in Heating Mode Set Point 180 F Throttling 5 F 4 Boiler Stages B C D _ a we mom see ear A NENNEN nemr mom s as e seetri a mom e ae 2 vso wwe ee NEC UNE mum 2 sw 480 SQ Elite 8T amp SQ Elite EXT Installation Manual 7 MAKE SURE YOU HAVE THE RIGHT CONTROL If you need the SQ Elite to do additional tasks that either are not listed or do not know how to configure them contact Heat Timer Corp Sales Department either by Phone 973 575 4004 Fax 973 575 4052 or by E mail support heat timer com INITIAL SETUP Having an Initial Setup Program will ease the configuration of the SQ Elite 8T and will provide the opportunity to utilize many of the energy saving features and give more comfortable heat when needed The program should consist of the following Selecting the features that your system can utilize Installation Install the Control switches and sensors e
46. emperature With any of the ratios the colder it becomes outside the hotter the temperature of the system water See Understanding Operation Concept on page 5 e With a 1 00 OD 4 00 SYS ratio the System water temperature SYS will increase rapidly as the outside temperature falls hitting the Maximum of 240 F at 35 F outside temperature With a 4 00 OD 1 00 SYS ratio the System water temperature SYS will increase slowly as the outside temperature falls Even at 30 F the system water will only be 125 F and at 22 F outside the system water will be 112 F Such a low Reset Ratio might be used with radiant floor heating applications With most baseboard heating applications 1 00 OD 1 00 SYS setting is a good place to start With a 1 00 OD 1 00 SYS ratio for every degree the outside temperature falls the system water temperature is increased one degree e frequired Adjust the RESET RATIO in cold weather If the ambient building temperatures are too cold in cold weather move the ratio to a higher selection That is 1 1 00 OD 1 00 SYS was initially selected change the selection to 1 00 OD 1 25 SYS If the building temperatures are too warm in cold weather move the ratio to a lower selection That is if 1 00 OD 1 00 SYS was initially selected change the 00 selection to 1 25 OD 1 00 SYS 8 Outdoor Temperature 130 120 110 _ Water Temperature CUSTOMIZED RESET RATIO Butt
47. equence stages based on the Reaction Time and the Boiler Minimum Run Time The PID relies on the rate of change in the System Temperature The PID logarithmic calculations foresee changes and sequence stages based on those changes It is the most efficient operation for most heating and cooling applications The Oversize option sequence stages based on how many Throttling ranges differentials 1s the system temperature away from the Target Temperature In Heating and at one Throttling range below the Set Point only one stage will be on For each additional Throttling range below the Set Point an additional stage will be activated The last stage on will be allowed to exceed the Set Point by one Throttling range before turning off that stage This helps to prevent the last stage from short cycling When PID is Selected the following are the settings that directly affects this modes operation e Reaction Time pg 24 SELECT Settings System Settings Stage Settings Reaction Time Purge Delay pg 24 SELECT Settings System Settings Stage Settings Purge Delay e Minimum Run Time pg 24 SELECT Settings System Settings Stage Settings Min Runtime e Standby Delay pg 25 SELECT Settings System Settings Stage Settings Standby Delay e Last Stage Hold pg 25 SELECT Settings System Settings Stage Settings Last Stage Hold When Oversize OSS is Selected the following are the settings that directly affects this modes operation Throttle pg 25 SELECT
48. ergized When the SQ Elite 8T PID logic foresees that the system will overshoot regardless of the current system and target values it will make sure that the last stage turned on energized has elapsed a full Minimum Runtime before it is turned off de energized Except for the lead stage no additional stages will be turned off de energized until another full Minimum Runtime is elapsed On the other hand if the last stage 1s a lead stage it will remain energized until the system reading exceeds the target set point by the Last Stage Hold value in addition to satisfying the Minimum Runtime condition That is if the Set Point was 150 F and the Last Stage Hold was set to 10 F the lead stage will remain energized until the system reaches 160 F and a full Minimum Runtime elapses This is useful in protecting the lead stages from short cycling OSS OPERATION OSS is used in fast reacting application as in process applications where maintaining a set point is critical The OSS utilizes the Throttle setting as a mean to calculate the number of stages the SQ Elite 8T shall have on at any point For every Throttle Range below the set point an additional stage shall be turned on energized That is if the set point was 180 F and the Throttle setting was 5 F if the System dropped below 175 F 180 F 5 F the lead stage will energize With further decrease in the system value to 170 F 180 F 5 F 5 F the second stage will energize As the syst
49. erminal marked with an O XX Outdoor Label Do not run sensor wires in conduit with line voltage wiring Outdoor on back of Sensor conduit WARNING The SQ Elite is an operating control only All equipment must have all safety and limit controls required by code It is the responsibility of the installer to verify that all the safety limits are working properly before the SQ Elite is installed A ALERT Determining the proper location for the Outdoor Sensor is very important The SQ Elite will base its operation on the outdoor temperature information it receives from this location If the sensor is in the sun or covered with ice its reading will be different from the actual Outdoor temperature 10 Heat Timer Corp WIRING T WIRING THE POWER TERMINALS 1 2 Bring the 120VAC 60Hz power wires through the bottom Knockout of the enclosure e Class 1 voltage wiring must enter the enclosure through a different opening from any Class 2 voltage wiring Connect the hot line to the terminal marked L Connect the neutral line to the terminal marked N Wer Sou Power Source A WARNING Class 1 voltage wiring must enter the enclosure through a different opening from any Class 2 voltage wiring Heat Timer recommends installing a surge suppressor on the power source to the SQ Elite opes WARNING Connect the Temperature sensor shield at the control to the sensor terminal marked O Do not connect the
50. fire a multi stage boiler both low and high stage relays must be energized some of the available cooling units require that the operation of the higher stages turn off the lower operating stages This can be achieved by selecting Single from the Startup Staging menu ADD UP TO 16 STAGES As a stand alone the SQ Elite 8 is designed to control eight stages However it has the capability of expanding its control to two extension panels SQ Elite EXT each with eight stages Thus the SQ Elite can control a total of up to 24 stages MONITOR SYSTEM RETURN TEMPERATURE Using a smart algorithm the SQ Elite 8T can monitor the boiler return temperature using an optional return sensor mounted on the return line Then sequence the boilers to raise the return temperature above an adjustable Minimum Return DHW PUMP CONTROL WITH MULTIPLE PRIORITY OPTIONS Having a DHW input either as a dry contact to be used with an external aquastat or as a temperature sensor that can be ordered separately the SQ Elite 8T can control a DHW pump using its built in DHW Pump output relay The user will have different priority options that varies based on the DHW piping design SQ Elite 8T amp SQ Elite EXT Installation Manual The SQ Elite 8T has multiple operating modes that satisfy most hydronic systems In heating when the Outdoor Reset is selected it can change the System Set Point based on outdoor temperature Or it can be set to Set Point and sequence stages to achieve
51. g applications when the outdoor temperature rises to the adjustable Outdoor Cutoff temperature the SQ Elite will control and sequence the cooling unit stages to hold the Set Point temperature naddition the Outdoor Cutoff can be set to ON or OFF In the ON option the System Relay will run regardless of the Outdoor temperature and the burner stages will be active to hold the target water temperature Inthe OFF position the system pump will always be off and all stages will be off as well DAY NIGHT SCHEDULES Button MENU Setback Day Schedules Night Schedule The SO Elite has two levels of heat or cool The Day level is used when a building is occupied and people are active The Night Setback level is used when a building is not occupied or when people are sleeping This setting reduces the calculated temperature in Heating and increase it in Cooling by the Setback setting based on the provided schedule In Heating if the Day calculated water temperature was 150 F and the Setback was 20 F the Night Schedule will run at 150 F 20 F 130 F Ifthe Boost feature is being used it uses the Day Schedule as a Boost ending point That is if the Day Schedule is set to start at 6 00AM the Boost was set to 10 F and the Boost Period was 30 minutes the Boost will start at 5 30AM Then when in Boost SQ Elite 8T will raise the calculated water temperature by the Boost amount Using the previous example at 5 30AM the SQ Elite
52. he SQ Elite 8T turns on a stage trying to meet a set point it will not turn on another stage until the Reaction Time has elapsed e To determine the optimum time in a heating system start with a hot system On the other hand in a cooling system start with a cool system Turn on a single stage and calculate how long it takes until the system begins to respond to that stage That period should be set as the Reaction Time See PID operation 6 PURGE DELAY Adjustable from 0 0 to 10 0 minutes Default 0 0 minutes Hold Button MENU System Settings gt lt Stage Settings gt Purge Delayin PID Logic only e Most large units must go through a purge cycle before they are brought on line When the SQ Elite 8T activates a unit the lowest stage on a unit it does not start to calculate its output until the Purge Delay is over This allows the unit to fully come on line and to begin producing output The Purge Delay helps prevent short cycling of a newly activated unit Once the lowest unit stage 1s activated it MUST run through the entire Purge Delay period See PID operation on page 6 e The minimum Purge Delay setting MUST be set to the time required by the units manufacturer specification MINIMUM RUNTIME Adjustable from 1 to 60 minutes Default 2 minutes Hold Button MENU lt System Settings gt lt Stage Settings gt Min Runtimein PID Logic only This is the minimum amount of time any stage will run See PID operation on page 6
53. hielded 2 conductor cable Belden 8760 or equivalent 18 2 Temperature sensors have no polarity Connect the wires from the outdoor sensor to the SQ Elite 8T terminals marked OUTDOOR TEMP 29 30 Connect the shield to the circled terminal 30 with one of the sensor wires Do not connect the shield at the sensor end Sensor Shiled RETURN SENSOR WIRING TERMINALS 31 32 OPTIONAL AVAILABLE IN HEATING ONLY e If the Return Sensor is connected must be purchased separately the SQ Elite 8T will recognize it and alternate 60 its temperature on the display with the Target temperature If the Return temperature is below the Minimum Return the SQ Elite 8T will sequence stages based on the Return Sensor Minimum Return Calculated Target and the actual System Temperature The Return on the SQ Elite 8T is designed to be connected to a temperature sensor that can be purchased separately HT 904250 00 for immersion in a 3 8ID well HT 350147 00 or 904011 00 e The sensor wires can be extended up to 500 using shielded 2 conductor cable Belden 8760 or equivalent 18 2 e Temperature sensors have no polarity Connect the wires from the outdoor sensor to the SQ Elite 8T terminals marked OUTDOOR TEMP 31 32 e Connect the shield to the circled terminal 32 with one of the sensor wires Do not connect it to the sensor Sensor Shiled SQ Elite 8T amp SQ Elite EXT Installation Manual WIRING THE DOMESTIC HOT WATER DHW SE
54. iant floor heating applications e With most baseboard heating applications a 1 00 OD 1 00 SYS setting is a good place to start With a 1 00 OD 1 00 SYS ratio for every degree the outside temperature falls the system water temperature is increased one degree e Ifrequired Adjust the RESET RATIO in cold weather If the ambient building temperature are cold in cold weather move the ratio to a higher selection That is if 3 150 1 00 OD 1 00 SYS was initially selected change the selection to 1 00 OD 1 25 1 SYS If the building temperature are too warm in cold weather move the ratio to a lower selection That is if 1 00 OD 1 00 SYS was initially selected change it to 1 25 5 110 OD 1 00 SYS e After selecting the Reset Ratio pressing the button will switch to the Outdoor 100 70 60 50 40 Cutoff setting option Outdoor Temperature CUSTOMIZED RESET RATIO Hold Button MENU lt Outdoor Reset gt Reset Ratio Custom e For situations where the available reset ratios do not provide the perfect building heat loss equilibrium the customized option can be used by selecting 1 45 t from the Reset Ratio menu option t provides the user with the capability of assigning two points on the reset ratio diagram and use the line that connects those two points as the customized reset ratio curve Each of the two points will need a specific System and Outdoor Temperature to identify it on the diagram
55. ing unit stages to hold the Set Point temperature In addition the Outdoor Cutoff can be set to ON or OFF In the ON option the System Relay will run regardless of the Outdoor temperature and the burner stages will be active to hold the target water temperature In the OFF position the system pump will always be off and all stages will be off as well The Offset setting moves the Reset Ratio curve vertically This means that regardless of the Outdoor temperature or the Reset Ratio that has been selected when the Offset setting is changed that change is directly added to or subtracted from the calculated temperature For example if the Set Point temperature was 130 F and the Offset was changed from 0 to 10 an increase of 10 the Set Point would increase to 140 F SQ Elite 8T amp SQ Elite EXT Installation Manual 23 e The Offset setting does not change the ratio selection For instance with 1 50 OD 1 00 oasi Miri SYS Reset Ratio the System water temperature will always increase one degree for Reset Hato 511 01 MacTarget 170 F every 1 5 degree change in the Outdoor temperature What the Offset does is add or Co subtract a constant temperature value See Understanding Operation Concept on page 5 E o The Minimum and Maximum Target will take precedence over the Offset That is if the Sum Max Target was set to 170 F and the Offset was set to 10 F If the set point was 165 F 8 o the new calculated set point based with th
56. ions The SQ Elite 8T controls the stages and their pumps or valves to maintain a precise system set point PID OR OVER SIZED SYSTEM OSS LOGIC The SQ Elite s control algorithm allows it to look at the rate of change in the system If the load is changing quickly the SQ Elite can be set to OSS sequencing where it will react based on load changes If the system oscillation is minimal as in heating applications the SQ Elite will make slow and gradual output adjustments Therefore the SQ Elite adapts to specific system requirements and minimizes oscillation around the set point DIGITAL DISPLAY OF ALL SYSTEM SETTINGS The SQ Elite s alphanumeric digital display names each system parameter in simple 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 key commands AUTOMATIC ROTATION AMONG STAGES Rotating the first stage to be activated on a call for output promotes even wear on each unit The SQ Elite has three modes of rotation Manual First On First Off FOFO or Time The Time rotates the lead stage every selected period from every hour to every 41 days OUTDOOR RESET WITH CUSTOMIZABLE CURVE With its Outdoor reset feature the SQ Elite 8T is capable of changing its temperature target based on the outdoor temperature It offers several parameters that can be used to fine tune the reset curve Offset Minimum and Maximum
57. l e a H E installation related to any electrical or E E E E plumbing diagram generated by Heat Timer Corp The provided illustrations are to demonstrate Heat Timer Corp s L control operating concept only SQ Elite 8T User Operation Manual 35 USER MENU SEQUENCE A ALERT DO NOT turn power off to the SQ Elite when in off season If you do so the battery will run down and will have to be replaced Instead switch to Summer or Winter Operating users have a simplified menu that can be accessed by clicking the Menu button Installer menu will have the same settings in addition to Startup and more advanced operation settings The installer menu can be access by holding down the Menu button for three seconds or more PROGRAM CHANGE SETTINGS To be able to change the SQ Elite 8T settings the Program Run Switch must be set to Program The switch is located under the Enclosure Wiring Cover for security The Enclosure Wiring Cover can be securely closed using a padlock PROGRAM ME RUN SEASON Button MENU Season Winter Summer Default Winter When in Heating mode the SQ Elite 8T will turn all boiler relays off when it is in Summer setting The Message Display Line will read to show status When in Winter the SQ Elite 8T will activate the Sys relay whenever the Outdoor temperature falls to or below the Outdoor Cutoff setting In addition it will begin heating whenever the System temperature falls below the
58. l or any flat surface All other enclosure components mount on the base The bottom section of the Enclosure Base contains the wiring chamber with knockouts on the bottom to ease installation The Enclosure Wiring Cover seals the wires from the external environment It has two screws to hold it to the base and a hole to secure a lock on the wiring enclosure A plastic web that separates the wiring apnd chamber into high and low volt sections has been provided Padlock not supplied Enclosure Wiring Cover Enclosure Base Mounting Base MOUNTING THE ENCLOSURE Select a location near the equipment to be controlled The surface should be flat and sufficiently wide and strong to hold the SQ Elite or SQ Elite EXT Keep the control away from extreme heat cold or humidity Ambient G a operating temperature is from 20 to 120 F Remove the Enclosure Wiring Cover from the control enclosure by removing the two bottom screws Remove the Enclosure Display Module by removing the middle screws Screw the Enclosure Base to the surface through the upper and lower mounting holes on the back of the enclosure Replace the Enclosure Display Module and replace the middle screws Do not replace the enclosure wiring cover until all wiring is done O o When purchasing a padlock for the enclosure the maximum shank diameter should not exceed 4 Display Mounting Screws Wiring Cover Mounting Screws SQ Elite 8T amp
59. ler lunes 26 Rotate Mode lt 26 Setback Schedule 26 setbacks 4 6 Gee hb teas 26 BOOST 2 62 cu oe Boa ea oe ae Wa 27 Boost Periods lt e csse Rex ote A bole de Roa R X 27 Day Night Schedules 27 Set Present Time 5o mte deal YS 28 DHW Settings cles 28 DHW Priority Timer Available with Parallel DHW Piping 28 DHW Set Point Requires an Optional DHW Temperature DENSON 2 2 Bie RR aot a DIE EUN 28 Pump Valve and Combustion Air Damper Operation 29 RUNON c ox ch ob the ux pote um UE S EE Nas 29 Pump EXereise ie sg xem de a obrui 29 Maintenance 30 System amp Outdoor Sensor Trim 30 History oae ELDER ede ik Ene eee 30 Configuration 30 Display and Buttons 30 Boiler C Unit Settings 32 x RATE Be REA Ay ct WAM TAI At 32 RUNTIME uuo Soa eRe ett ped atus 32 TROUBLESHOOTING 33 MULTIPLE BOILERS WITH PUMPS PIPING WIRING DIAGRAMS 34 USER MENU SEQUENCE 35 Program Change Settings 35 Season so e ee ad 35 Set Point Not Adjustable in EMS Mode 36 Reset Ratio 36 Customized Reset Ratio 36 Outdoor Cutoff Temperature 37 Setbacks s s uil ane Oe a e
60. ll allow the adjustment of the Auto Rotate Period If 24 Hours default setting was selected the first rotation will take effect after 12 hours if the Time was not set However if the Time was set the rotation will always take place at 2 00AM The following rotations will take place every 24 hours thereafter f Time Rotation was set to other than 24 hours the rotation timer will start from the moment the setting is changed IfFirst On First Off FOFO is selected the concept will follow this example if A is the lead the starting sequence of the units will be A B then C When the de energizing of the stages starts it will turn off A B Then C Then stage D will be the new lead for the next load If Time Rotation is selected SETBACK SCHEDULE Hold Button MENU lt System Settings gt lt Stage Settings gt lt Setback Schedule This menu provides the Setback and Boost based on Day Night Schedule It will only be available when Shutdown or Tstat are selected as the Startup External Input option SETBACK Adjustable from 0 F 0 C to 80 F 44 C Default 0 F 0 C Hold Button MENU lt System Settings gt lt Stbck Schdle gt Setback in Day Night Schedule Hold Button MENU lt System Settings gt Setback in External Signal e The Setback feature can be used to provide the SQ Elite 8T with a lower temperature Set Point in heating or a higher Set Point in cooling when less load is required during the night or on the weeken
61. n heating whenever the System temperature falls below the Set Point Temperature The Message Display Line will not display any season information e In Cooling Mode the SQ Elite 8T will turn all stage relays off when it is in Winter setting and the Message Display Line will read i to show that status However in Summer all stages will be off When the season is over it is a good practice to switch the SQ Elite 8T Season setting This will allow DHW calls in heating to operate the boilers when needed RESET RATIO Custom 1 8 00 OD 1 00 Sys to 12 4 00 OD 1 00 Sys Default 1 1 00 OD 1 00 Sys Hold Button MENU lt Outdoor Reset gt Reset Ratio In Outdoor Reset Only The Reset Ratio applies only to Heating applications e The Reset Ratio determines how the system Target temperature will vary based on the outdoor temperature With any of the ratios the colder it becomes outside the hotter the temperature of the system water See Understanding Operation Concept on page 5 e With a 1 00 OD 4 00 SYS ratio the System water temperature SYS will increase rapidly as the outside temperature falls hitting the Maximum of 240 F at 35 F outside temperature With a 4 00 OD 1 00 SYS ratio the System temperature SYS will increase slowly as the outside temperature falls Even at 30 F the system water will only be 125 F and at 22 F outside the system water will be 112 F Such a low Reset Ratio might be used with rad
62. n requires the use of the 4 20mA EMS Interface HT 926741 00 You must select the 4mA min and 20 mA max Set Point values in the following screens Connect the 4 20mA EMS Interface to the SQ Elite 8T RS485 connection using the phone cable provided with the 4 20mA EMS interface DISPLAY UNIT F C Default F Hold Button MENU lt System Startup gt Display Unit e The SQ Elite 8T can control boilers and chillers in hydronic environment where the temperature is the critical factor It allows the user to display temperature information and settings in either F Fahrenheit or C Celsius Select the display unit that is best suited for your application SETTING THE 4MA AND 20MA SET POINTS AVAILABLE IN 4 20MA EMS ONLY 4mA from 10 F 23 C to 240 F 116 C Default 100 F 38 C 20mA from 10 F 23 C to 240 F 116 C Default 170 F 77 C Hold Button MENU lt System Startup gt EMS 4mA Set Point EMS 20mA Set Point If EMS 4 20mA is selected from the Control Mode menu as the temperature set point source the user must purchase a Heat Timer 4 20mA EMS Interface HT 926741 00 to accept the 4 20mA signal and transmit it to the SQ Elite 8T naddition the user will need to set the temperature range parameters First set the 4mA temperature set point then the 20mA temperature set point e shutdown the control using the EMS signal aen a signal that i is above or below the 2 22mA range The display
63. nd the higher stage of the same unit must be connected to Stage B The unit valve or pump for the same unit must be connected to Stage C Pas CONNECTING TO THE SQ ELITE EXT PANELS AND 4 20MA EMS INTERFACE The SQ Elite is equipped with a phone socket RS485 to connect to the SQ Elite EXT Extension p Interface using the provided 6 pin phone cable Each SQ Elite EXT Extension has two RS485 communication ports Use one to connect to the SQ connect to the second extension or the 4 20mA EMS Interface anels or the 4 20mA EMS Elite Use the other port to Additional compatible devices can utilize the second RS485 connection on the second SQ Elite EXT Extension An example would be to use the 4 20mA EMS Interface HT 926741 00 to provide a 4 20mA set point signal SELECTING THE SQ ELITE EXT PANEL LETTER The SQ Elite is capable of communicating to two SQ Elite EXT Extensions However each extension must be identified as either A or B using the switch on each extension to avoid having communication problem Extension A Switch is set to A will operate stages I through P While Extension B Switch is set to B will operate stages Q through X Connecting SQ Elite to Two Extension Panels and 4 20mA EMS Interface using RS485 to the SQ Elite SQ Elite SCENE EAE A T i Q o Q T pr
64. ne from the top is the Message Display Line In normal operation it displays the Target Set Point If a Return sensor was connected the Target display will be alternating its value with the Return temperature When the control is to display a status message the message will replace Target and Return temperatures See Display Messages on page 31 SQ Elite 8T amp SQ Elite EXT Installation Manual 31 The two middle buttons functions are as follows The Horizontal arrows are to scroll through the available stages e The Vertical arrows are to scroll through the menu functions when in menus or to change values of settings when in its specific screen System Temp DEI Temp 4 EE Sr n g Message Display Line all 28 F DE DISPLAY OUTPUT STATUS The SQ Elite 8T unit sequencing status gives immediate access to each unit status The following list shows all possible boiler status e AB Two Stage unit and Unit AB is the Lead in sequencing Brackets indicate Lead Stage e Unit is de energized The unit Mode is set to Auto STB Unit is de energized The unit Mode is set to Standby HI Unit highest stage is active The unit Mode is set to either Auto or Standby MED Unit Middle stage is active Available in Three stage units only The unit Mode is set to either Auto or Standby MHI Unit Middle High stage is active Available in Four stage units only The unit Mode is set to either Auto or Stan
65. nergize on a DHW call Selecting the Primary Secondary option will energize the System relay with the DHW Pump relay whenever there is a call for DHW even during the Summer or when outdoor temperature is above the Outdoor Cutoff No priority will be available A ALERT A DHW call can be initiated by either a dry contact or using a Heat Timer Sensor HT 904220 00 or 904250 00 for immersion in a 3 8ID well HT 350147 00 or 904011 00 The use of a sensor will allow the adjustment of the DHW Set Point and DHW Differential DHW PUMP OUTPUT No Yes Default Yes Hold Button MENU System Startup gt DHW Pump Output e The SQ Elite 8T can control the operation of the DHW Pump This option allows the user to select if the SQ Elite 8T should be controlling the DHW Pump or not COMBUSTION AIR DAMPER OUTPUT No Yes Default Yes Hold Button MENU System Startup gt Comb Air Output e The SQ Elite can control the operation of the Combustion Air Damper This option allows the user to select if the SQ Elite should be controlling the Combustion Air Damper or not If Yes is selected the SQ Elite will energize the Comb Air relay whenever there is a call for a boiler and will use the PROVE input to check on the status of the Combustion Air Damper When the last stage is de energized the Comb Air relay will remain energized for the Run On period and then de I e On aprove failure situation the message Tor input is Shorted
66. ntil 6 00AM where it will drop back to the normal calculated temperature of 150 F 28 Heat Timer Corp SET PRESENT TIME Hold Button MENU lt System Settings gt lt Setback Schedule gt P resent Time Hold Button MENU lt Maintenance gt Present Time e The Time is used for Day Night Schedule and History graph e Adjust the time by selecting Time from the menu and then scrolling through the hours followed by the minutes If hours are to be set to PM scroll through the AM hours to reach the PM hours ALERT Remember that the battery is used as a time backup If no power is supplied to the SQ Elite the battery will die in three months and time clock values will be lost Thus DO NOT power down the control during off season DHW SETTINGS Hold Button MENU System Settings gt lt DHW Settings e ADHW call can be initiated by shorting the DHW input terminals 33 and 34 In addition using a Heat Timer temperature sensor on the same terminals instead of a dry contact input will add the DHW Set Point and Differential control capability OnaDHW call the SQ Elite 8T will raise the Target to either 200 F or the Maximum Target which ever is lower e The SO Elite 8T provides three levels of DHW pump operation The first is when Primary Secondary is selected as the DHW Piping from the Startup Menu on page 18 This option will provide no DHW Priority And if there was a DHW call during the Summer or when the outdoor temperatur
67. on MENU lt System Settings gt lt DHW Settings gt DHW Diff e This represents the number of degrees the DHW temperature can drop from the DHW Set Point before a DHW call can be recognized and the DHW Pump relay energized A large DHW Differential will result in oscillation in the DHW temperature However small DHW Differential will have a tighter control over the DHW temperature but might result in boilers coming on frequently for short periods to satisfy the DHW Set Point and Differential settings PUMP VALVE AND COMBUSTION AIR DAMPER OPERATION The SQ Elite 8T controls multiple relays each controlling different types of equipment In addition to the control of the boilers or cooling units it can control the primary system pump unit pumps or valves a DHW pump and a combustion air damper The operation of those relays depends on the Startup and System Settings RUN ON Adjustable 0 to 60 minutes Default 2 minutes Hold Button MENU System Settings gt Run On The Run On applies to all pumps valves and dampers It is the additional time pump valve or a combustion air damper relay will run after the output unit relays has de energized For pumps and valves it is used to dissipate the excess energy from the heating or cooling system into the building For a combustion air damper it brings in enough fresh air for the next boiler fire up The Run On time should be set based on the size and type of the equipment
68. on MENU Outdoor Reset Reset Ratio Custom e For situations where the available reset ratios do not provide the perfect building heat loss equilibrium the customized option can be used by selecting i from the Reset Ratio menu option t provides the user with the capability of assigning two points on the reset ratio diagram and use the line that connects those two points as the customized reset ratio curve Each of the two points will need a specific System and Outdoor Temperature to identify it on the diagram e Set the first point specify Sys Temp 1 and OD Temp 1 Then specify Sys Temp 2 and OD Temp 2 to set the second point on the curve The two points can be anywhere on the line not necessarily at the ends The chart shows an example of a customized curve 6 OD 5 SYS that does not exist in the standard curve options If the outdoor temperature reaches 30 F the system target will be 145 F e Remember that the Offset Min Target and Max Target apply to all reset ratios including the customized reset ratio ones SQ Elite 8T User Operation Manual 37 Point1 System 120 F Point2 System 170 F Oudoor 60 F Oudoor 0 F 180 E Rel Max Target 20 10 TM m i Water Temperature in F 3 e 0 B H H 70 60 50 40 30 20 10 0 10 2 Outdoor Temperature in F Custom Reset Ratio OUTDOOR CUTOFF TEMPERATURE Adjustable Off 20 F 7 C 100 F 38 C On Default 70 F 21 C But
69. on ees AE 37 Day Night Schedules 37 SPECIFICATIONS 40 SQ Elite 8T amp SQ Elite EXT Installation Manual SQ ELITE 8T LAYOUT Program Switch to restrict access to function changes This Switch is covered with Enclosure Wiring Cover Button function is presented on LEDs indicate bottom row of the display associated relay s status ge B ge B ge ge OMB AIR ge D ge D se Copper Conduclrs On ocu fi orm MEG o 4 6 8 9 10 4 6 8 19 20 4 26 9 0 2 34 3 38 OF SISISISISISISISISISISISHS S S SISISISISISIS S SISISISISISISISISISISIS S i kJ O When connecting Temperature Sensors no Polarity is observed Prove terminals must be connected for SQ Elite to operate stages Output Relays to manage the stages Connect to Extension panels to add additional stages or connect to 4 20mA EMS Interface for external set point System Output controls pumps valves or other system components DHW Pump and Comb Air relays are controlled when configured 4 Heat Timer Corp SQ ELITE 8T OVERVIEW SEQUENCES UP TO 8 STAGES WITH PUMPS OR VALVES The SQ Elite 8T is the perfect control whenever multiple boiler or chiller stages are required for hydronic heating or cooling applicat
70. s In this case select the Off option on the Minimum Return to allow the monitoring of the return on the display without sequencing the boiler stages 24 Heat Timer Corp RETURN LAG Adjustable from 0 to 30 minutes Default 2 minutes Hold Button MENU Min Return Return Lag in Heating only It is the time it takes for the system return to change after sequencing the stages Initially adjust this value to equal the Reaction Time Then in extreme cold weather monitor the return making sure it is about 10 F above the Minimum Return setting and adjust it if needed SYSTEM SETTINGS Hold Button MENU System Settings The System Settings menu provides access to adjusting and fine tuning the system for enhanced comfort and better fuel savings The SQ Elite behaves differently based on the selected Control Modes see Startup Settings 17 PROGRAM CHANGE SETTINGS To be able to change the SQ Elite settings the Program Run Switch must be set to Program The switch is located under the Enclosure Wiring Cover for security The Enclosure Wiring Cover can be securely closed using a padlock prRoGRAM RUN STAGE SETTINGS Button MENU lt System Settings gt lt Stage Settings gt REACTION TIME Adjustable from 1 to 10 minutes Default 2 minutes Hold Button MENU lt System Settings gt lt Stage Settings gt Reaction Timein PID Logic only 1015 the amount of time it takes a single stage to affect the system e After t
71. s or valves relays will remain energized for the Run On delay period and then turn off The Shutdown signal must be a dry contact input No voltage can be placed across the SHUTDOWN terminals Bring the two wires from the dry contact to the SHUTDOWN 35 36 terminals When Shutdown is selected Setback will be available using the programmed Day Night schedule WIRING THE T STAT TERMINALS 35 36 This feature can be used whenever it is desirable to switch the SQ Elite 8T to operate from a remote location i e EMS input or thermostat It will only be available when Tstat is selected as the External Input Mode option from the Startup menu on page 18 When the Tstat is enabled by closing a dry contact the SQ Elite 8T will activate the heating cooling logic The Tstat signal must be a dry contact only No voltage can be placed across the TSTAT terminals Bring the two wires from the dry contact to the TSTAT 35 36 terminals When Tstat is selected from the Startup External Input mode Setback will be available using the programmed Day Night schedule WIRING THE SETBACK TERMINALS 35 36 This feature can be used whenever it is desirable to switch the SQ Elite to operate in Setback from a remote location i e EMS input or external time clock It will only be available when Setback is selected as the External Input Mode option from the Startup menu See page 18 When the Setback is enabled by closing a dry contact the Target will change by the
72. s to maintain the system temperature around the Set point The system can be expected to fluctuate around the set point The amount of fluctuation depends on the System Settings and Stage Settings If an Outdoor Sensor was connected pressing the button will continue to the Outdoor Cutoff setting option If the EMS Mode was Enabled the Set Point will be set by the EMS BMS system and will be available as a read only The range of Set Point in the EMS is set in the Startup menu at 4mA and 20mA Any reading below the 2mA or above 22mA will indicate a i o E message on the Message Line In Outdoor Reset mode Outdoor Cutoff will always exist However in Set Point mode if the outdoor sensor is installed the Outdoor Cutoff screen will automatically appear after the temperature Set Point has been selected In Heating applications when the outdoor temperature falls to the adjustable Outdoor Cutoff temperature the SQ Elite 8T will control and sequence the boiler stages to hold the calculated temperature When the outdoor temperature rises to the Outdoor Cutoff plus a 2 F differential the SQ Elite 8T will turn all boilers off The System Combustion Air Damper and any other Pump or valve relays that were energized will remain energized for the Run On delay and then de energize In Cooling applications when the outdoor temperature rises to the adjustable Outdoor Cutoff temperature the SQ Elite will control and sequence the cool
73. sfy most hydronic systems It can sequence stages to achieve an adjustable Set Point or an Outdoor Reset Ratio in heating applications only Moreover when used with the 4 20mA EMS Interface HT 92674 1 00 it can accept a 4 20mA signal as a set point The 4 20mA EMS Interface must be purchased separately This gives the SQ Elite 8T the capability of being controlled remotely PID OPERATION PID control logic is primarily used for building heating or cooling The logic will utilize two primary settings to add or subtract stages The Reaction Time is used to turn on energize stages On the other hand the Minimum Runtime is used to turn off de energize stages In heating applications a call for heat by either closing the T STAT input or opening the SHUTDOWN input and when the outdoor temperature is below the Outdoor Cutoff the SQ Elite 8T will turn on energize the lowest firing stage of the Lead Boiler to start the Purge Delay After the elapse of the purge period the SQ Elite 8T will start calculating the Reaction Period If after a full Reaction Time the control logic foresee additional stages are needed the SQ Elite 8T will energize the following stage If that stage was another boiler that boiler has to go through a full Purge Delay before starting to calculate the Reaction Time for that stage Otherwise if the next stage was the higher firing stage on the same boiler the Reaction Time will start from the moment the higher firing stage relay 1s en
74. st Stage Hold This example shows that the lead stage will turn off when system temperature reaches 150 F Waiting for Comb Prove The System or Combustion Air Damper relay is ON and the prove terminals are open before the lead boiler relay can energize SYS Prove Failure After boilers have run for a while Prove signal was opened The boiler relays will de energize However the System relay will remain energized 32 Heat Timer Corp BOILER C UNIT SETTINGS Button BOILER n most installations all active unit adjustments are the same but each can be configured differently if desired e When the BOILER or C UNIT button is depressed the Unit A Settings menu will be shown e Make all the appropriate settings for Unit AB if 2 Stage was selected as the Burner Type from the Startup on page 19 e Then select the Next Stage option from the menu to bring up the Boiler CD Settings menu and make all the settings Continue until all boilers have been set e fa SQ Elite EXT is connected to the SQ Elite 8T scrolling through stages using the Next and Prev menu options will scroll through the SQ Elite EXT stages as well ALERT To be able to change the SQ Elite settings the Program Run Switch must be set to Program The switch is located under the Enclosure Wiring Cover for security The Enclosure Wiring Cover can be securely closed using a padlock PROGRAM RUN MODE Auto Standby Off On Default Auto Button BOILE
75. status checker The SQ Elite will energize the Combustion Air Damper relay whenever there is a call to energize any of the unit stages e The Combustion Air output relay is a Normally Open N O dry contact It does not source any power e Class 1 voltages must enter the enclosure through a different opening from any Class 2 voltage wiring WIRING THE STAGES TERMINALS 3 TO 17 The SQ Elite can be configured to operate the stages of the heating or cooling units Moreover it can be configured to operate the unit pumps or valves in addition to the unit stages Therelays are dry contacts only They do not source any voltage e Wire the relay contacts in series with the unit s limit circuit e Class 1 voltages must enter the enclosure through a different knockout from any Class 2 voltage wiring WIRING THE STAGE OUTPUTS Lo Hi Lo Hi e Each Stage output A through H has one N O relay Unit Unit2 e When wiring several multi stage units start with the lower stage of the first unit and wire it to Stages Stages Output A followed by the higher stage of the same unit and wire it to Stage B SQ Elite 8T amp SQ Elite EXT Installation Manual 13 WIRING THE PUMP OR VALVE OUTPUTS If the SQ Elite 8T is configured to operate Stage Pumps or Valves They must be wired to the stage output after the highest stage for that unit That is the low stage for the first unit must be connected to A a
76. tages will have CE as their status and will seize to operate STAGING Multiple Outputs Single Output Default Multiple Outputs Hold Button MENU System Startup gt Staging e Most units will require that the higher output stages be energized after the lower output stages These units will need to select the Multiple Output option That means both Low and High Output stages must be energized to achieve the unit s maximum output e Some units require that when the higher output stages are required the lower stages must de energize To operate these units the user must select the Single Output option SEQUENCE Lo Hi Lo Hi Lo Lo Hi Hi Default Lo Hi Lo Hi Hold Button MENU System Startup gt Sequencing Some units run more efficient when the lower stages are energized alone than with the higher stages These types of units should select Lo Lo Hi Hi Then the SQ Elite will sequence the lower stages of all Automatic units before sequencing the higher stages e For the rest of the unit types the Lo Hi Lo Hi should allow the staging of the lower stage of the lead unit followed by the higher stage of the same unit Then when more stages are needed it will fire the lower stage of the lag unit followed by the higher stage of the lag unit 20 Heat Timer Corp CONTROL LOGIC PID OSS Over Sized System Default PID Hold Button MENU lt System Startup gt Sequencing e The PID option allows the SO Elite to s
77. time the system will receive Boost If External Signal was selected as the Setback Mode the Boost will start when the switch from Setback to normal operation takes place and will continue for the full Boost Period An example would be if the Boost Period was set to 30 minutes and the shorting of the Setback terminals has ended at 7 00Am the Boost will start at 7 00Am and will terminate at 7 30Am where the control will resume normal operation If Day Night Schedules were available the Boost will start a full Boost Period prior to the switch from Night setback to Day normal operation If the Day was set to start at 7 00Am the Boost Period was set to 30 minutes the Boost will start at 6 30Am and terminate at 7 00Am The temperature limits set on the boilers MUST be set considerably higher than the SQ A WARNING Elite 8T s Set Point for the reasons detailed below The temperature limits set on The SQ Elite 8T sensor is located in a common header some distance from the boilers the boilers must be higher than As the temperature rises in the header and before reaching the sensor location energy is the SQ Elite Set Point Read dissipated Therefore the temperature in the header could be lower than that registered the section at left for details by boiler sensors that will prevent erratic system In addition to the normal drop experienced between the boiler s temperature and that operation read by the SQ Elite 8T sensor the Last Stage Hol
78. ton MENU Outdoor Cutoff in Set Point In Outdoor Reset mode Outdoor Cutoff will always exist However in Set Point mode if the outdoor sensor is installed the Outdoor Cutoff screen will automatically appear after the temperature Set Point has been selected When the outdoor temperature rises to the Outdoor Cutoff plus a 2 F differential the SQ Elite 8T will turn all boilers off The System and Comb Air relays that were energized will remain energized for the Run On delay e The Outdoor Cutoff can be set to ON or OFF In the ON position the System Relay will run regardless of the Outdoor temperature and the burner stages will be active to hold the set point Inthe OFF position the System Relay will always be off and all stages will be off as well SETBACK Adjustable 0 F 0 C to 80 F 44 C Default 0 F 0 C Button MENU Setback e The Setback feature can be used to provide the SQ Elite 8T with a lower Set Point when less load is required In Heating applications when the outdoor temperature falls to the adjustable Outdoor Cutoff temperature the SQ Elite 8T will control and sequence the boiler stages to hold the calculated temperature When the outdoor temperature rises to the Outdoor Cutoff plus a 2 F differential the SQ Elite 8T will turn all boilers off The System Combustion Air Damper and any other Pump or valve relays that were energized will remain energized for the Run On delay and then de energize In Coolin
79. water temperature 1 degree On the other hand a poorly insulated tee En 5 building with insufficient radiation may need a Reset Ratio of 1 00 OD 2 00 SYS 120 Water Temperature 130 This means that for each degree the outdoor temperature dropped the water temperature E will increase 2 degrees The SQ Elite has a full range of Reset Ratios to match any 120 buildings heat loss characteristics 90 420 Offset A heating curve that relies not only on Outdoor temperature but also on the type of 100 radiation will improve heat comfort The following are suggested initial settings for different types of radiation based on average building insulation and heat loss The contractor can fine tune these adjustments based on the specific building need Type of Radiation in Building Reset Ratio Offset Radiators Steel amp Cast Iron 1 00 OD 0 F Baseboard Finned copper tube amp Cast Iron 1 00 OD O F Radiant High Mass Concrete 4 00 OD 1 00 SYS 10 F OD SYS OD SYS Radiant Low Mass Joists 2 00 OD 10 F Fan Coils amp Air Handlers 1 00 OD 20 F 70 60 50 40 Outdoor Temperature A WARNING When controlling a non condensing boiler the Minimum Target temperature must be set to the boiler manufacturer specifications In that case system temperature must not go below such temperature 6 Heat Timer Corp The SQ Elite 8T has multiple operating modes that sati
80. will show the message zi and all stages will de energize However the System Comb Air and Unit xps and Valves will continue for the Run On delay period and then de energize 18 Heat Timer Corp APPLICATION Heating BreakOnRise Cooling MakeOnRise Default Heating BreakOnRise Hold Button MENU lt System Startup gt Application e The SQ Elite 8T offers two application modes Heating and Cooling In Heating the SQ Elite will sequence stages and when the system temperature is below the set point In addition the system relay will energize when the outdoor temperature is at or below the Outdoor Cutoff setting n Cooling the SQ Elite 8T will sequence stages and when the system temperature is above the set point In addition the system relay will energize when the outdoor temperature is at or above the Outdoor Cutoff setting e Return Temperature monitoring or DHW options will be available in cooling applications DHW PIPING AVAILABLE WITH HEATING ONLY Parallel Primary Secondary Default Parallel Hold Button MENU lt System Startup gt DHW Piping When Parallel is selected the SQ Elite 8T will offer a DHW Priority Timer The DHW priority will only take place during heating periods See the DHW Priority Timer on age 28 The priority will allow the DHW Pump relay to energize while de energizing the System relay when there is a DHW call during heating However during Summer only the DHW Pump relay will e

Mini-MOD and Mini-Extension Installation Manual - Heat

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