Lochinvar GAS HEATER FOR COMMERICAL POOL APPLICATIONS service manual Pump Purge Delay Option

Page 36

Commercial Pool Heaters

INSTALLATION Continued

Ensure that the pump installed on the pool heater will supply adequate flow to make the flow switch contacts and operate the pool heater. A water flow switch meets most code requirements for a low-water cut off device on appliances requiring forced circulation for operation.

PUMP PURGE / MAINTENANCE TIMER OPTION

Pump Purge Delay Option

An electronic pump purge option is available for this pool heater. During extended periods of inactivity during which pumping may have been turned off to conserve energy, air can become entrapped in the piping. The pump purge option delays pool heater operation until the pump has been on for sufficient time to remove air from piping. Both the inactivity time and pump purging time are adjustable.

The inactive timer is adjustable from 1 - 99 hours. Selection of a time between 4 - 8 hours is recommended.

The purge timer is adjustable from 1 - 60 minutes. Selection of a time between 10 to 30 minutes is recommended.

An override toggle switch is provided to turn off the pump purge feature for testing or should the option no longer be desired. When turned off, the call for heat will not be delayed.

Service Indicator Option

A service indicator option is available for this pool heater. The Service Indicator light on the Diagnostic Information Panel will light up indicating that the pre-programmed hours/cycles have elapsed. Contact a qualified serviceperson to perform service on the pool heater.

CONNECTING TO

ELECTRICAL SUPPLY

This pool heater is wired for 120 VAC service. The pool heater, when installed, must be electrically grounded in accordance with the requirements of the authority having jurisdiction or in the absence of such requirements, with the latest edition of the National Electrical Code ANSI/NFPA No. 70. When the pool heater is installed in Canada, it must conform to the CAE C22.1, Canadian Electrical Code, Part 1 and/or local Electrical Codes.

1.Use only Type-T wire [63°F (35°C) rise] on all wiring between the pool heater and field-installed devices.

2.Enclose line voltage wire exterior to the pool heater in approved conduit or approved metal-clad cable.

3.The pump must run continuously when the pool heater is being fired.

4.To avoid serious damage, do not energize the pool heater until the system is filled with water.

5.Provide the pool heater with the proper overload protection.

IMPORTANT: Do not block access to the electrical cover plate when installing electrical conduit.

3-Way Automatic Bypass Valve Wiring

If the piping loop was disassembled for shipping or needs to be fitted with an outdoor enclosure, connection or disconnection of the 3-way automatic bypass valve will be required. Wiring connections should be made to the appropriately numbered terminals on the 3-way automatic bypass valve as follows:

-Yellow to terminal #1

-Blue to terminal #2

-White with a red stripe to terminal #3

-Pink to terminal #4.

Note: Orientation of the valve connections may vary from what is shown. Care should be taken to ensure wires are connected to the appropriate terminals, see Figure 33 on page 32 of this manual.

￿WARNING: Power must be removed and the clutch button must be depressed before attempting to manually operate the valve or damage to the 3-way valve may occur.

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Contents GAS Heaters for Commercial Pool Applications Commercial Pool Heaters General Product Information UnpackingCommercial Pool Heaters Product Identification Clearances from Combustible Construction Base for Combustible FloorsFreeze Protection Combustion Air FilterInstallation Combustion Air OptionsExhaust Fans Combustion Air from Interior SpaceGeneral Information Venting SupportVertical Vent Termination Clearances and Location Sidewall Vent Termination Clearances and Location Table BCombustion Air Inlet Piping Length of Air Inlet PipeSidewall Air Inlet Vertical Rooftop Air Inlet Combined Air Inlet PointsVent System Options Conventional Negative Draft VentingNegative Draft Masonry Chimney Installations Flue Outlet PipingCommon Venting Systems Vertical DirectAire Venting Inspection of a Masonry ChimneyVent Kits Sidewall VentingVenting of Flue Products Sidewall Fan Sidewall Venting TerminationSidewall Venting Without Fan Masonry Chimney Installation Horizontal DirectAire Venting TABLE-EDirect Venting Horizontal DV Venting Termination Flue Pipe MaterialsCombustion Air Inlet Piping Length of Air Inlet Pipe Air Inlet Piping MaterialsSealing Type-B Doublewall Vent Pipe or Galvanized Vent Pipe Combined Combustion Air Inlet Points Vertical Rooftop Air InletOutdoor Installation Venting Outdoor Vent/Air Inlet LocationCombustion Air Fan Adjustment for startup 3-Way Valve Cover InstallationGas Pressure Test Outdoor Vent Cap KitConnecting Gas Piping to the Pool Heater Gas PipingGas Train and Controls Combination Gas Valves Venting of Combination Gas ValvesChecking Gas Supply Pressure TABLE-JMultiple Unit Installations Gas Supply Pipe Sizing Table KGas Manifold Pressure Adjustment Measuring Net Manifold Gas PressureAuxiliary Mixed Water Limit Control Pumped Automatic BypassWay Valve Cover Heater is Within 15 Feet of Pool Piping Heaters are within 15 feet Perpendicular of Pool Piping Water Flow Switch Relief ValveAutomatic Chlorinator and Chemical Feeders Pump Purge Delay Option Service Indicator OptionWay Automatic Bypass Valve Wiring Terminal Strip Connection Options TABLE-MOperation Lighting InstructionsPre-Start Checklist To Turn Off Gas To Pool HeaterStarting the Filter System Operation Programming Mode Error Messages Displayed by the Temperature ControllerDiagnostic Status Indication Hot Surface Igniter and Ignition Control ModuleHot Surface Ignition Control Module Ignition Module Lockout FunctionsAccess to Internal Control Panel TABLE-NIgnition and Control Timings Water Chemistry TABLE-OTABLE-P Test Recommended LevelPipe Size Requirements Circulating PumpMinimum Pump Performance Heat ExchangerHigh Water Temperature Limit Control Flue Gas Passageways Cleaning ProceduresAppliance Area Water Circulating PumpBurner Removal and Cleaning Heat Exchanger CleaningElectrical Combustion and Ventilation AirAdjusting Differential Air Pressure Fan CleaningCombustion Air Fan Adjustment Set-Up ProcedureAdjustment Procedure Servicing Hot Surface Igniter and Ignition ModuleIgnition System Checkout Sequence of Operation Glossary Prepurge Wiring BOX Connections Wiring BOX Connections Ladder Diagram Control BOX Connections Commercial Pool Heaters Appendix a Appendix B View Menu Item Menu Description
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