Lochinvar 1, 000 Table S, Temperature Adjustment, Default Values Pre-programmed in the Excel

Page 39

is unique to each Excel 10 and must be placed into the network of an energy management system so that the Excel 10 can be recognized by the system. NOTE: If the Excel 10 is ever replaced, a tear-off label on the new Excel 10 must be placed over this label on the back of the unit for easy reference.

The Excel 10 may have values for the control points specified at the time the control is configured at the factory. If exact control settings are not specified at the time an appliance is ordered, the Excel 10 controller will be pre-programmed with the following default values as shipped from the factory. Special arrangements should be made with the factory during the ordering process to have job site specific values programmed into the control. These values are different for boiler and water heater applications.

TABLE - S

Default Values

Pre-programmed in the Excel 10

To Activate the Manual Override:

1. In the event of a failure of the primary control, move the

“Stop/Run” switch on the front of the control panel to “Stop”.

2. Move the toggle switch, located on the back of the unit to

“Manual Override”.

3. If the bypass valve does not modulate under the control of the

manual override thermostat, it will be necessary to manually to

set the bypass valve to deliver a minimum 140°F water

temperature to the primary heat exchanger following the

procedure below:

a. Disconnect the bypass valve’s 3-pin wire harness from its

connection in the junction box on the upper left of the rear

of the appliance.

b. If the Excel 10 readout function is still active, check the

“Return/In Temp” for a return water temperature the unit

might see in regular operation.

c. Press the “Down” or “Up” arrow key to find the “Bypass

Temp” readout.

Point

_______________

Setpoint Temp

_______________

O.A. Lockout

_______________

O.A. Max

_______________

O.A. Min

_______________

Max Setpoint

_______________

Min. Setpoint

_______________

Operating Sensor

_______________

Heater I.D.

Boiler

_______________

130.0°F

_______________

70.0°F

_______________

60.0°F

_______________

10.0°F

_______________

220.0°F

_______________

100.0°F

_______________

Return/Inlet

_______________

Boiler

Water Heater

_______________

120.0°F

_______________

N/A

_______________

N/A

_______________

N/A

_______________

190.0°F

_______________

50.0°F

_______________

Return/Inlet

_______________

Water Heater

d. Fire the unit with the manual override control. As the unit

reaches a steady state operation, depress the clutch

mechanism and turn the handle slowly counterclockwise to

open the bypass valve to a point at which the “Bypass

Temp” is 140°F.

e. Release the clutch and leave the valve in this position until

the primary control can be replaced. Do not reconnect the

3-pin bypass wire harness.

To Return to the Primary Control:

1.

After the replacement primary control is installed, reconnect

 

the 3-pin bypass wire harness.

2.

Move the toggle switch to “Primary Control”.

MANUAL OVERRIDE CONTROL

This unit is trimmed with an auxiliary thermostat to provide a manual override in the event of a failure of the Sequencer Control or the Excel 10. When the manual override is activated, it will provide temporary control until a replacement Sequencer or Excel 10 can be installed.

The manual override fires the appliance at 100% Btu/hr input rate during the entire cycle. Modulating burner control is not available with the manual override. In addition, the pump will run continuously. Intermittent pump operation is not available with the manual override.

Modulation of the bypass valve may not be available with the manual override. If the primary control failure is in a remote Sequencer, the bypass valve should modulate. If the Excel 10 inside the appliance has failed, the bypass valve may not modulate.

The manual override is located on the back of the appliance below the bypass piping loop. To the left of the thermostat is a toggle switch to alternate the control of the appliance from the primary control to the manual override thermostat.

Some models may have a reduced firing rate when manual override is activated.

3.

Turn the manual override thermostat to the lowest setting.

4.

Move the “Stop/Run” switch to “Run”.

If you have any questions or comments, please call the Lochinvar Technical Product Service Line at 1-800-722-2101.

TEMPERATURE ADJUSTMENT

COMMAND DISPLAY

FIG. 54 Command Display Panel

39

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Contents
Warranty Special Instructions To OwnerIFB/IFW-i&s-05 Table of Contents Owner Warning Checking EquipmentDo not What to do if YOU Smell GASClearances from Combustible Construction Installation Procedure Location of UnitRecommended Service Clearances Table aCombustion Air Direct from Outside 500 in2 3226 cm2 667 in2 4303 cm2 000 in2 12,903 cm2 Table BMinimum Recommended Combustion AIR Supply to Mechanical RoomConstruction Air Filter Construction AIR FilterCategory IV Flue Pipe Sizes Construction AIR Filter Kits Table CVenting Table DVenting Guidelines for a Category IV Vent Category IV Positive Pressure Venting SystemCategory IV Venting Category IV Flue Pipe MaterialsDrain Tee Installation General Category IV Vent Termination ClearancesExceed a maximum of 100 equivalent feet 30.5 m in length Vertical Venting Terminations Masonry Chimney InstallationsSidewall Vent Sidewall Venting TerminationsTable E Sidewall Vent Cap KitsDirect Vent INTELLI-VENT Systems Location of a Sidewall Vent TerminationLength of Air Inlet Pipe Table FDirect Vent and Intelli-Vent Flue Air Inlet Pipe Sizes Air InletCombined 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 InstallationsAir Inlet Sidewall Input Flue Pipe Btu/hr Size Table HCombined Air Inlet Points Maximum Length of an Intelli-Vent System500,000 SVK3026 Horizontal INTELLI-VENT with Vertical Combustion AIRAir Inlet Sidewall Input Flue Pipe Btu/hr Size Cap KitLocation of a Rooftop Air Inlet Cap Vertical Combustion Horizontal INTELLI-VENT AIR InletTable J Table L GAS Supply GAS Pressure TestTable K GAS ConnectionTable N Recommended Gas Pipe Size Single Appliance InstallationsMultiple Appliance Installations Gas Pipe Size Chart Table MChecking GAS Supply Pressure GAS Manifold Pressure AdjustmentInstall Piping to Control GAS PipingChecking Manifold GAS Pressure Water Connections Water ConnectionsSecondary Heat Exchanger Primary Heat Exchanger Inlet and Outlet ConnectionsMinimum Pipe Size Requirements Bypass Valve Synchronization Integral BypassBypass Initial Set-up of Maximum Water Flow Bypass Piping AssemblyIntegral Circulator Optional Intermittent Pump OperationBypass Operation Minimum Water TemperaturesBtu/hr Input Temperature Rise Table PGAS Train and Controls Water Flow SwitchTable Q LOW Water CutoffDiaphragm 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 To Activate the Manual Override Temperature AdjustmentDefault Values Pre-programmed in the Excel Table SAccessing the SIX Changeable Points from Command Display Password FunctionConfiguring Command Display Table T Display Default ValuesSequencing Type Calculated Set PointTotal Run Time Set Point TempCommand Display Data Screen Hot Surface Igniter On Status PointsTable U Status Point Operational ModesOptional 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 Z Diagnostic Status IndicationTable Y Ignition and Control TimingsTable AA OPERATION/DIAGNOSTIC LIGHTS, Resets and SwitchesIndicator BurnerCombustion Air Blower and Transition Chamber Combustion AIR BlowerCondensate Drain Location On Rear Condensate ManagementSystem Optional Table BBCondensate 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 Water Connections Heating Boilers only Heating Boiler InstallationsFreeze Protection for a Heating Boiler System If Required Water TreatmentCirculator Pump Operation Primary Loop Circulator Pump SpecificationsPiping Lengths Boiler Circulator Pump LimitationsPRIMARY/SECONDARY Boiler Piping Minimum Boiler Water TemperaturesBtu/hr Input Maximum Flow Boiler Temperature Rise Chart Table DDTable CC Maximum Flow for Heating BoilerTEMPERATURE/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 InstallationsCommon Manifold Table GGPump Operation Heat ExchangerTable HH Thermostat SettingsOptional Relief Valve Thermal ExpansionCathodic Protection Ladder Diagram PWM Wiring Diagram
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