Bryan Boilers 250, Triple-Flex 150, & 300, 200 service manual LEAD-LAG Operation

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4.4LEAD-LAG OPERATION

This is a summary of the functional capability of the embedded lead-lag on the Sola control. OEM Configurable parameters may be adjusted as part of the OEM factory configuration and in the field using the System Display with appropriate password permissions. Specific parameters may also be configured in the field by the local display 1. Field Installation Configuration a. The master and slave controllers are enabled via the S7910 or S7999 display. b. All Sola controllers are programmed with a default address of 1. Assuming the Master Sola controller remains address 1, the address of the slave controllers in the system must have a unique address (1..8) via the local display. 2. Basic Operation a. Firing rate determination – Parallel common-base limited

(1)All boilers have a single assignable base load firing rate. (2) Allocation (a)As load increases: (i) Until all stages are Firing - No stage is requested to exceed the common base load rate. (ii)After all stages are Firing - There is no restriction on the slave's commanded firing rate. (b)As load decreases: (i) As long as all available stages are firing - There is no restriction on the slave's commanded firing rate. (ii)When at least one stage has been dropped - No stage is requested to exceed the common base load rate. b. Rotation (1) The lead boiler is rotated based sequence order. The lead boiler rotation time is a configurable OEM assigned parameter. Rotation is sequential by address (1- 2-3-4; 2-3-4-1; etc.) (2) Rotation trigger occurs at the start of each new heat cycle. c. Source of heat for call – The call for heat originates at the master boiler. This source may be configured to be an external thermostat or via EnviraCOM Remote Stat. d. Slave boiler lockout – If any slave is in lockout the master boiler will cause it to be skipped and all system load setting calculation settings will be based only on available boilers. e. Master boiler lockout – If the master boiler is in lockout then its burner control function will be skipped in the rotation the same as the slave controllers. However, the master boiler function will continue to operate. 3. System Component Failure Responses a. If the system header sensor becomes disconnected from the master boiler then the master boiler will control off of one of the following OEM configurable actions (1) Disable - No backup will

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Date: 8-4-2010

Revision: 0

Form: 2396

be used (a)Lead Outlet - Outlet temperature of the lead boiler will be used as the backup during firing (i) Slave Outlet Average - Average of the outlet temperatures of all slave boilers that are firing will be used as a backup (b) If the sensor chosen by the above parameter is faulty then the backup sensor provided may be used. When burner demand is off and no burners are firing then, for either "Lead Outlet" or "Slave Outlet Average", the lead boiler's outlet temperature is used to monitor for burner demand. 4. Local Display Configuration and Operation a. The configuration parameters available on the local display are edited in the Service Mode b. Access to the Service Mode is accomplished by pressing both up/down buttons for 3 seconds. c. Status and Operation (1) Slave status (a) “Rmt” and “Adr” icons are on to show slave (follower) has been enabled. (b)Current burner status is shown (c) To show slave CFH (i) Alternate “%” firing rate and actual (slave) Outlet temp to indicate slave CFH otherwise show the Home screen. (2) Master status (a)Rmt icon is on, Adr icon is off to show Master (Leader) has been enabled. (b)Current burner status is shown (c) Actual temperature LL (Header) temperature is shown as described in 4e below. (d)Pressing the up/down buttons allows setpoint adjustment for LL-CH only (not LL-DHW or LL-Mix or others). (i) All pump configurations must be done using the PC Configuration tool in the OEM factories. (e)To show Master CFH (i) Alternate “CH” or “LL” or “Hdr” in numbers field with the actual temperature to indicate LL CH CFH. d. Configuration (1) Continue scrolling through set- up screens until “Remote Firing Control” screen is reached. (2) Rmt On/Off selection chooses to navigate the user through the Master/Slave configuration as existing today (3) Set master/slave remote address as is done on currently on the local display. (4) The following parameters are mapped to Modbus addresses. LEAD LAG 5 66—A1171(a) “LL” = LL Operation (3 user selections available) (i) “Ldr” (i-a)Master Enable (i-b)Slave Enable (ii)“SLA” (ii-a)Slave Only Enable (ii-b)Master Disable (i) “OFF” (iii- a)Master Disable (iii-b)Slave Disable (b)HS = On/Off Hysteresis (One value used for all LL boilers) (i) “HS” for on and off hysteresis values. (i-a)Only allow 1 setting for both on and off hysteresis values. (a-1)Must adhere to the strictest of either the HS On or Off limits. • Highest value of the “low” range limit in Sola control • Lowest value of the “high” range limit in Sola control (a-2)See Sola Modbus specification for details. • Typical values: 2-15 (c) BL =

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Contents Triple-Flex High Efficiency Boilers Triple-Flex 150, 200, 250 High Efficiency Boilers Table of Contents Lead Drop-Stage On Error Ldse Figures Date Date Revision Form Clearances Boiler FoundationMinimum Clearances to Combustible Surfaces DIMBoiler Connections Safety Relief ValvesFlow Connection Expansion Tank ConnectionsElectrical Requirements Venting of GAS Train ComponentsKW HP Combustion AIR SupplyLOUVERS, GRILLES, and Screens Combustion AIR OpeningsFlue GAS Venting System Design & InstallationScfm Combustion AIR and Venting Requirements for CanadaBefore Placing Boiler in Operation Marking of GAS VentsTest of GAS Piping Hydrostatic Test of Boilers and SystemStart-Up and Operation Triple-Flex High Efficiency Boilers TRIPLE-FLEX Front View Boiler AssemblyTriple-Flex Rear View TRIPLE-FLEX Rear ViewTRIPLE-FLEX Behind the Cabinet Door TRIPLE-FLEX Left Side ViewTRIPLE-FLEX Right Side View Air Flow Switch TRIPLE-FLEX Left Flue Collector View Pilot Spark Igniter AssemblyTRIPLE-FLEX Right Flue Collector View POWER-UP ValidationHome Sola Hydronic Control SystemKeyboard NavigationStatus Configuration ConfigureSample Configuration Configuration PasswordSafety Verification Configure Verify Change Parameter SettingsSafety Parameter User Confirmation FAULT/ALARM HandlingHome Page Lockout Info BAR Lockouts Clear Lockout OperationFiring Rate Control Operation Firing Rate Field Modulation Configuration Configure ModulationAnnunciation Operation Calibrate Touch Screen Setup Advanced Setup Diagnostics Advanced Setup Setup Advanced SetupSystem Time Setup Advanced Setup Date & Time Outdoor Reset Configure Reset / Reboot DisplayAdvanced Setup Display Reset Safety Verification Configure CH Central Heat Configuration Configure Sensor ConfigurationConfigure CH Central Heat Configuration PID Sound Pressure LevelsSound Pressure Readings Alert Codes Modbus CommunicationDHW RPMODR ILK A2D SLOHFS PIIRevision PRE Checks and Setup Test SetupBoiler Commissioning ModulationDRY RUN Pilot AdjustmentAdjusting Boiler Minimum Input Adjusting Boiler Maximum InputInitial Light OFF IWCGAS Meter Readings CFH = 3600Vc gc CFH = ft 3 hr −1 of gas Vc = ft clockedPII Or L TroubleshootingDate ILK OFF LCI OFFPII OFF ILK on Weak VsnsrAre OEM Specific Fault Codes Fault CodesOFF ThroughOFF Blower LCI High Limit setpoint setting 228 Invalid Reserved Care and Maintenance Boil OUT Procedure Boiler Water Treatment Draining the SystemDo not Flush the System Through the Boiler Suggested Maintenance Schedule External FIRE-SIDE CleaningDate Revision Form Lead Lag Lead LAG LL Master General Operation General Description of the Lead LAG ApplicationDrop-stage method Drop-stage detection timing LL / Multi-Boiler Field Wiring System Wiring HookupLEAD-LAG Operation Slave Parameters Slave Operation and SetupSlave Mode USE FIRST, Equalize RUNTIME, USE Last Overall Control LL Master Operation and SetupSlave Status Manager Periodic Data Polling MessagesInvalid Response or no Response AbnormalFaultCounter Used to tolerate momentary abnormalityMaster Heat Demand LL CH Demand Switch DISABLE, STAT, Environcom Remote StatMaster Service Status Master Active ServiceModulation Sensor LL Modulation Sensor S5Demand and Rate Implementation Rate AdjustmentIntegrator Compensation Rate Allocation Method Parallel Commonbase Limited Rate AllocationBase Load Common 0-100% Overflow and Underflow Modulating StageStagerstate = Active Burner DemandStagerstate = Idle Error Threshold ADD-STAGE Error Threshold DegreesADD-STAGE Rate Offset -100% to +100% ADD-STAGE ConditionLL ALL Boilers OFF Threshold Temperature or None DROP-STAGE Error Threshold DegreesDROP-STAGE Rate Offset -100% to +100% DROP-STAGE ConditionForce Lead Rotation Time Hhmm or None Lead DROP-STAGE on ErrorLAG Selecton Method Sequence ORDER, Measured RUN Time Date Revision Form Forced Lead Rotation Sequencer 1 Minute EventSlave Write Data Slave Read Data
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