Lochinvar 1, 000 Multiple Appliance Installations, Efficiency Optimized with Time Equalization

Page 45

Setpoint Temp — This is the lowest boiler operating temperature that the boiler will maintain when the outside air temperature is at the O.A. Max. This setting is a Changeable Point from the Command Display.

Calculated Set Point — The water temperature as adjusted by the optional outdoor air reset function used on a heating boiler only. If no outdoor reset function is used, this displays the same temperature as the set point. The Outdoor Air Reset function is not available on a water heater application.

These functions are shown in the screens of the Command Display. Where noted, these settings are changeable from the Command Display to configure boiler operation to the building heat load and weather conditions in a specific geographic area.

MULTIPLE APPLIANCE

INSTALLATIONS

SEQUENCING BOX

(MULTI-BOILER)

REMOTE DISPLAY MOUNTING

CLOSED VIEW

COMPONENT

 

LOCATIONS

FIG. 58 Sequencer Control Panel

SEQUENCING OPTIONS

The sequencer is supplied as a separate control enclosure that is connected to the multiple appliances via an E-bus connector on the rear of the appliance. The sequencer comes mounted in an enclosure that requires a field installed 24 VAC power source. An optional enclosure with a sub base and 24 VAC power supply is available to allow remote mounting of a Command Display adjacent to the sequencer. Multiple sequencing options are available. The specific software programming required to sequence multiple boilers must be specified at the time the appliances are ordered. The sequencing options are used to control how multiple boilers or water heaters are cycled to meet system demand. The sequencing options are programmed into an Excel 10 controller at the factory based on the number of selectable sequencing algorithms ordered. The desired method of sequencing multiple boilers or water heaters may be selected from the screen of the Command Display. There are up to five sequencing options that are selectable from the Command Display, based on the sequencing package purchased.

NOTE:

Separate sequencers are required to control multiple boilers and water heaters.

1.First On - First Off — This is a lead/lag control functionality. The sequencing of the boilers or water heaters is based on the total loop load with

added units

being

brought

on

when

the units

that are running are at 100% and

the loop

load is

not

being

met. Boilers

or water

heaters

are

turned

off

when

the

loop

load

falls

and

the first boiler or

water heater on is at minimum load.

2.First On - Last Off — This is a simple first on/last off without rotation of the lead boiler or water heater.

3.Efficiency Optimized — The lead/lag will be based on first on/first off lead/lag. The overall efficiency will be optimized to run the boilers or water heaters at their highest efficiency. Highest efficiency occurs at the minimum loading for each boiler or water heater. Therefore, this option will add boilers or water heaters when the load reaches a

point where the next boiler or water heater can run at minimum load.

4.Efficiency Optimized with Time Equalization —

This is the same as “Efficiency Optimized” but the lead/lag is based on boiler or water heater run times. The boilers or water heaters will be sequenced to equalize run times to within approximately a 24 hour time period. If no opportunity is given to cycle, the control will not interrupt action to equalize runtime.

5.None — This is the default for any boiler or water heater control which has not purchased one of the Sequencing Option Packages.

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Contents
Warranty Special Instructions To OwnerIFB/IFW-i&s-05 Table of Contents Do not Checking EquipmentWhat to do if YOU Smell GAS Owner WarningRecommended Service Clearances Installation Procedure Location of UnitTable a Clearances from Combustible ConstructionCombustion Air Direct from Outside Minimum Recommended Combustion Table BAIR Supply to Mechanical Room 500 in2 3226 cm2 667 in2 4303 cm2 000 in2 12,903 cm2Construction Air Filter Construction AIR FilterVenting Construction AIR Filter Kits Table CTable D Category IV Flue Pipe SizesCategory IV Venting Category IV Positive Pressure Venting SystemCategory IV Flue Pipe Materials Venting Guidelines for a Category IV VentDrain Tee Installation General Category IV Vent Termination ClearancesExceed a maximum of 100 equivalent feet 30.5 m in length Vertical Venting Terminations Masonry Chimney InstallationsTable E Sidewall Venting TerminationsSidewall Vent Cap Kits Sidewall VentDirect Vent INTELLI-VENT Systems Location of a Sidewall Vent TerminationDirect Vent and Intelli-Vent Flue Air Inlet Pipe Sizes Table FAir Inlet Length of Air Inlet PipeCombined Combustion Air Inlet Points Vertical Direct Vent SystemsHorizontal Direct Vent Multiple Vertical Direct Vent InstallationsSidewall Combustion AIR Inlet Table GLocation of a Sidewall Air Inlet Cap These are Multiple Horizontal Direct Vent InstallationsCombined Air Inlet Points Table HMaximum Length of an Intelli-Vent System Air Inlet Sidewall Input Flue Pipe Btu/hr SizeAir Inlet Sidewall Input Flue Pipe Horizontal INTELLI-VENT with Vertical Combustion AIRBtu/hr Size Cap Kit 500,000 SVK3026Location of a Rooftop Air Inlet Cap Vertical Combustion Horizontal INTELLI-VENT AIR InletTable J Table K GAS Supply GAS Pressure TestGAS Connection Table LMultiple Appliance Installations Gas Pipe Size Chart Recommended Gas Pipe Size Single Appliance InstallationsTable M Table NInstall Piping to Control GAS Manifold Pressure AdjustmentGAS Piping Checking GAS Supply PressureChecking Manifold GAS Pressure Water Connections Water ConnectionsSecondary Heat Exchanger Primary Heat Exchanger Inlet and Outlet ConnectionsMinimum Pipe Size Requirements Bypass Valve Synchronization Integral BypassIntegral Circulator Bypass Piping AssemblyOptional Intermittent Pump Operation Bypass Initial Set-up of Maximum Water FlowBtu/hr Input Temperature Rise Minimum Water TemperaturesTable P Bypass OperationTable Q Water Flow SwitchLOW Water Cutoff GAS Train and ControlsDiaphragm GAS Valve Ratio GAS Valve Relief ValveElectrical Connections Jacket AssemblyFront Control Panel Locations Access to Components and ControlsTransformer and Relay Locations Variable Frequency DriveHigh GAS Pressure Switch LOW GAS Pressure Switch Optional LOW AIR Pressure SwitchExcel Be used as a diagnostic indicator Default Values Pre-programmed in the Excel Temperature AdjustmentTable S To Activate the Manual OverrideConfiguring Command Display Password FunctionTable T Display Default Values Accessing the SIX Changeable Points from Command DisplayTotal Run Time Calculated Set PointSet Point Temp Sequencing TypeCommand Display Data Screen Table U Status PointsStatus Point Operational Modes Hot Surface Igniter OnOptional on Heating Boilers Only Outdoor Reset Function SelectionsEfficiency Optimized with Time Equalization Multiple Appliance InstallationsSingly Terminated FTT Network Bus Topology Specifications Interfacing Multiple AppliancesTable W Additional Components Used to Interface Multiple Appliances Wire Termination for E-Bus ConnectionTypical Building Management System Diagram High Water Temperature Limit ControlService Parts HOT Surface Ignition SystemIgnition Module Lockout Functions Table Y Diagnostic Status IndicationIgnition and Control Timings Table ZIndicator OPERATION/DIAGNOSTIC LIGHTS, Resets and SwitchesBurner Table AACombustion Air Blower and Transition Chamber Combustion AIR BlowerSystem Optional Condensate ManagementTable BB Condensate Drain Location On RearCondensate Testing Condensate Trap InstallationReplenishing the Neutralizer Lighting Instructions Install Condensate TrapIgnition System Checkout To Turn OFF GAS to ApplianceHeat Transfer Process Sequence of OperationEnd of Sequence MaintenanceBurner Maintenance Burner Removal and CleaningLocation of Primary Heat Exchanger Burner Cleaning ProcedureSecondary Heat Exchanger Inspection Lubrication Freeze Protection Freeze Protection for a Heating Boiler System If Required Heating Boiler InstallationsWater Treatment Water Connections Heating Boilers onlyPiping Lengths Primary Loop Circulator Pump SpecificationsBoiler Circulator Pump Limitations Circulator Pump OperationPRIMARY/SECONDARY Boiler Piping Minimum Boiler Water TemperaturesTable CC Boiler Temperature Rise Chart Table DDMaximum Flow for Heating Boiler Btu/hr Input Maximum FlowTEMPERATURE/PRESSURE Gauge Typical Heating Boiler InstallationsPlacing the Boiler Operation Installation with a Chilled Water System Boiler Operating Temperature ControlBoiler Operation Typical Water Heater Piping with Storage Tank Water Velocity ControlTable EE Table FFMaximum Flow Rate Btu/hr Input Water Chemistry Single Water Heater Piping with Two Storage Tanks Piping Multiple Unit InstallationsPump Operation Table GGHeat Exchanger Common ManifoldTable HH Thermostat SettingsOptional Relief Valve Thermal ExpansionCathodic Protection Ladder Diagram PWM Wiring Diagram
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