Lochinvar GAS HEATER FOR COMMERICAL POOL APPLICATIONS service manual Vent Kits, Sidewall Venting

Page 17

Installation and Service Manual

Figure 20 – Vertical DirectAire Installation with Rooftop Combustion Air Inlet

Vent Kits

￿WARNING: Only use a sidewall air inlet cap supplied by the appliance manufacturer or a rooftop air inlet cap supplied by the vent manufacturer. Using any other air inlet cap for single-unit installations or using a common air inlet cap for multiple units with insufficient free area and/or protections from wind and weather may result in operational problems and the spillage of flue products. Spillage of flue products can cause personal injury or death due to carbon monoxide poisoning.

For single pool heater installations with sidewall air inlet, (see Figure 18) you must order the sidewall air inlet kit. The part number for each SVK kit is listed by input size in TABLE–D.

For single pool heater installations with rooftop air inlet (see Figure 20), you must order the rooftop air inlet kit The part number for each VDK kit is listed by input size in TABLE-D. Purchase the flue pipe, rooftop flue termination, and air inlet pipe locally.

There is no vent kit for combined air supply systems for multiple pool heaters. Make sure the air inlet cap is properly sized. You must purchase this cap locally.

A barometric damper is not required in the flue on Vertical DirectAire™ installations if the draft is within the negative

0.04to 0.08 inches w.c. required for proper operation. If the draft exceeds this range, install a barometric damper.

TABLE-D

T–C

DirectAire™ Kits

 

 

 

Input Horizontal Vertical

Btu/hr Kit* Kit*

500,000 SVK3047 VDK3026

650,000 SVK3048 VDK3027

750,000 SVK3048 VDK3027

990,000 SVK3040 VDK3023

1,260,000 SVK3041 VDK3024

1,440,000 SVK3041 VDK3024

1,800,000 SVK3041 VDK3024

2,070,000 SVK3041 VDK3024

*The SVK kits include a DV box adapter and sidewall air inlet cap. The VDK kits include a DV box adapter and a rooftop air inlet cap. See note on page 12 concerning DV box adapter.

3. Sidewall Venting

IMPORTANT: Before installing a venting system, follow all venting clearances and requirements found in the Venting, General Information section, page 10.

This option uses a powered vent assembly which pulls the flue products out of the stack. This fan generates a negative draft at the pool heater. Combustion air is drawn from the mechanical room (see Combustion and Ventilation Air, page 7).

Venting of Flue Products

For venting flue products vertically to the outdoors, follow all requirements in the installation instructions for conventional venting in this manual. Follow all clearance requirements in Vertical Vent Termination Clearances and Location, page 10.

Figure 21 – Sidewall Venting Installation with an Induced Draft Fan and Sidewall Vent Cap

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Contents GAS Heaters for Commercial Pool Applications Commercial Pool Heaters Unpacking General Product InformationCommercial Pool Heaters Product Identification Base for Combustible Floors Clearances from Combustible ConstructionCombustion Air Filter Freeze ProtectionCombustion Air Options InstallationCombustion Air from Interior Space Exhaust FansVertical Vent Termination Clearances and Location General InformationVenting Support Table B Sidewall Vent Termination Clearances and LocationSidewall Air Inlet Combustion Air Inlet PipingLength of Air Inlet Pipe Combined Air Inlet Points Vertical Rooftop Air InletNegative Draft Vent System OptionsConventional Negative Draft Venting Common Venting Systems Masonry Chimney InstallationsFlue Outlet Piping Inspection of a Masonry Chimney Vertical DirectAire VentingVenting of Flue Products Vent KitsSidewall Venting Sidewall Venting Without Fan Sidewall FanSidewall Venting Termination Masonry Chimney Installation TABLE-E Horizontal DirectAire VentingDirect Venting Combustion Air Inlet Piping Horizontal DV Venting TerminationFlue Pipe Materials Sealing Type-B Doublewall Vent Pipe or Galvanized Vent Pipe Length of Air Inlet PipeAir Inlet Piping Materials Vertical Rooftop Air Inlet Combined Combustion Air Inlet PointsOutdoor Vent/Air Inlet Location Outdoor Installation Venting3-Way Valve Cover Installation Combustion Air Fan Adjustment for startupGas Pressure Test Outdoor Vent Cap KitGas Train and Controls Connecting Gas Piping to the Pool HeaterGas Piping Venting of Combination Gas Valves Combination Gas ValvesChecking Gas Supply Pressure TABLE-JTable K Multiple Unit Installations Gas Supply Pipe SizingMeasuring Net Manifold Gas Pressure Gas Manifold Pressure AdjustmentPumped Automatic Bypass Auxiliary Mixed Water Limit ControlWay Valve Cover Heater is Within 15 Feet of Pool Piping Heaters are within 15 feet Perpendicular of Pool Piping Automatic Chlorinator and Chemical Feeders Water Flow SwitchRelief Valve Way Automatic Bypass Valve Wiring Pump Purge Delay OptionService Indicator Option TABLE-M Terminal Strip Connection OptionsLighting Instructions OperationStarting the Filter System Pre-Start ChecklistTo Turn Off Gas To Pool Heater Operation Error Messages Displayed by the Temperature Controller Programming ModeHot Surface Igniter and Ignition Control Module Diagnostic Status IndicationHot Surface Ignition Control Module Ignition Module Lockout FunctionsIgnition and Control Timings Access to Internal Control PanelTABLE-N TABLE-O Water ChemistryTest Recommended Level TABLE-PCirculating Pump Pipe Size RequirementsMinimum Pump Performance Heat ExchangerFlue Gas Passageways Cleaning Procedures High Water Temperature Limit ControlAppliance Area Water Circulating PumpHeat Exchanger Cleaning Burner Removal and CleaningElectrical Combustion and Ventilation AirFan Cleaning Adjusting Differential Air PressureCombustion Air Fan Adjustment Set-Up ProcedureIgnition System Checkout Adjustment ProcedureServicing Hot Surface Igniter and Ignition Module Sequence of Operation Glossary Prepurge Wiring BOX Connections Wiring BOX Connections Ladder Diagram Control BOX Connections Commercial Pool Heaters Appendix a View Menu Item Menu Description Appendix B
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