Raypak 992B manual

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23.When a CFH occurs, a 24 VAC signal is sent to the CFH light on the status panel located on the lower left front of the control compartment.

24.Power is also sent from pin 2 of the stage 1 con- nection to pin P1-3 of the universal diagnostic board.

25.Power is now sent to terminal TP4 of the Economaster II to energize the relay and close the contacts.

26.Power is waiting at the common terminal of the flow switch waiting for closure and sufficient water flow.

27.The heater pump is energized upon relay closure of the Economaster II.

28.Upon sufficient flow from the heater pump, the flow switch contacts will close.

29.If there is insufficient flow and the flow switch does not close, a 24 VAC signal is sent to the Universal Diagnostics Board to indicate the fault.

30.The flow light is energized; located on the front status panel.

31.A 24 VAC signal is also sent to the “TH” terminal located on ignition module one.

32.Once the 24 VAC “TH” signal is received at ignition module one, the internal contacts between F1 and F2 close sending a 120 VAC signal to the 120 VAC pilot duty terminals, located at J14 on the circuit board.

33.The 120 VAC signal continues to the coil of the blower relay K-4 (N.O.).

34.The 120 VAC signal continues to the 120 VAC safety terminals located at J13 on the circuit board.

35.When the coil on relay K-4 is powered, the N.O. relay contacts close and energize the blowers from the J8 connections on the CPW board.

36.After proper air pressure is received in the air plenum, the air pressure switches will close.

37.If there is insufficient air pressure and the air pres- sure switch does not close, a 24 VAC signal is sent to the Universal Diagnostics Board to indicate the fault.

38.A 24 VAC signal is now sent to the blower LED’s on the status board.

39.Power is applied to the optional equipment inter- lock connection (normally jumpered).

40.The 24 VAC signal is then sent to the 24 VAC safe- ty connector.

41.24 VAC is now sent to the pressure switch (P.S.) terminal on the ignition modules.

42.Once the pressure switch signal is received at ignition module one, the heater performs a 15-sec- ond pre-purge, then hot surface igniter one is energized by a 120 VAC signal from S-1 on igni- tion module one for approximately 30 seconds. (The hot surface igniter must draw greater than 3.1 amps while being energized or ignition lockout will occur after three tries.)

43.Once ignition module one determines that hot sur- face igniter one has heated up and operating properly, a 24 VAC signal is output from pin GV on module one.

44.24 VAC signal is received at gas valve 1 thus ener- gizing it.

45.The stage 1 LED on the status display board is now illuminated.

46.The coil of relay K-2 is now energized with the N.O. contacts closing downstream of the stage 2 and upstream of the stage 3 connections.

47.The gas coming through the burners should ignite from the heat of hot surface igniter one and the flame should carry over from one burner to the other burners of stage 1. Remote flame sensor one is now trying to sense the flame. If the flame is not sensed within 4 seconds, the ignition mod- ule will shut down gas valve 1 and retry hot surface igniter one. During ignition retry the heater must perform a 15-second pre-purge and approx- imately a 30-second igniter warm-up before opening gas valve 1 again. The standard ignition module will attempt ignition a maximum of three times prior to ignition lockout.

48.If ignition module one locks out, a signal will be sent to the Universal Diagnostics Board and to the status display board to indicate an ignition fault.

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Contents Installation & Operating Instructions Page Contents Pay Attention to These Terms Before Installation Installations at ElevationProduct Receipt Model IdentificationComponent Locations Component Locations BackGeneral Information Model Quantity Vent Size Gas Burners BlowersValves Model Burners per Valve Stages Fire at StageTime/Temperature Relationships in Scalds General SafetyWater Time to Produce Serious Temp Burn Installation Installation CodesEquipment Base StackingTable D Vent/Air Inlet Termination Clearances Outdoor Installations Indoor InstallationsClearances Combustion and Ventilation Air Reversing Air FilterDirect Vent Indoor UnitsInstallations Conventional Combustion Air SupplyTruSeal Combustion Air All Air from Inside the BuildingCanadian Installations Water PipingGeneral Reversing Water ConnectionsRelief Valve Piping Hydrostatic Test Cold Water OperationHydronic Heating Temperature & Pressure GaugePump Selection Pressure Drop in Feet of Head Feedwater Regulator PipingAir-Separation/Expansion Tank Three-Way ValvesPotable Water and Space Heating Pool HeatingAutomatic Chlorinators and Chemical Feeders Winterizing Your HeaterGas Supply Pool/Spa Water Chemistry Water HardnessPH of Water Total Dissolved SolidsGas Supply Connection Reversing Gas Supply ConnectionModel Table I Maximum Equivalent Pipe LengthElectrical Power Connections Check the Power SourceGas Supply Pressure Field-Connected ControllersField Wiring Connection Making the Electrical ConnectionsOn-Off Wiring Connections Venting Flue Exhaust TeeModel Diameter Order Number Appliance CategoriesSupport of Vent Stack Vent Terminal LocationCombustion Exhaust Certified Combustion AirCanadian Installations InstallationsChanging the Flue Outlet Venting Installation Tips Venting ConfigurationsInstallation Natural Draft Vertical Venting CategoryTermination Common Venting SystemCertified Vertical Venting Combustion Air Air Inlet Model HeightHorizontal Through-the-Wall Venting Category Horizontal Through-the-Wall Venting CategoryDirect Vent Horizontal Through- the-Wall Model Certified Maximum Combustion Air InletVenting EquivalentDirect Vent Vertical Direct Vent VerticalControls Outdoor InstallationFreeze Protection Heater Sequence of Operation Models 992B-1262BExternal Lights Color Indication Models 1532B 1802B Page Page Models 2002B 2342B Page Page High Limit Manual Reset Flow SwitchIgnition Module Operating ControlHigh and Low Gas Pressure Switches Low Water Cut-Off OptionalUDB Diagnostic Board Pump Time DelayUDB Fault History Water Piping 87%-Efficiency Boilers Special InstructionsVenting Appliance Categories Vent Terminal Location Vertical Venting CategoryCondensate Management Certified Maximum Combustion Air Air Inlet Model Venting Combustion 40’ 75’ 2072BE Air 2342BEDirect Vent Horizontal Through- the-Wall 992BE 75’ 100’ 1262BE Galvanized Steel 1532BE Category 25’ Wiring Diagram-Models 992B-1262B Wiring Diagram-Models 1532B-2342B START-UP Pre Start-upMain Burner Adjustment Blower AdjustmentStart-Up Safety Inspection Leak Test Procedure Dual-Seat Gas ValvesFollow-Up Pilot Turn-Down TestPost Start-Up Check Leak TestLighting Instructions OperationTo Turn Off Gas To Appliance Troubleshooting StepSuggested Minimum Maintenance Schedule MaintenancePreventive Maintenance Schedule Weekly Semi-AnnuallyAnnually As RequiredAppendix Inside Air ContaminationLimited Parts Warranty HI Delta Types H and WH Limited Parts Warranty HI Delta Type P START-UP Checklist for FAN-ASSISTED Raypak Products Page Page Page

992B specifications

The Raypak 992B is a highly regarded commercial boiler known for its efficiency and reliability in heating applications. Designed for a range of installations, it is particularly favored in schools, hotels, and various commercial settings where dependable heating is crucial. One of the standout features of the Raypak 992B is its impressive thermal efficiency rating, often exceeding 90%. This efficiency translates into lower energy costs and reduced environmental impact, making it a smart choice for eco-conscious businesses.

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Safety features are also paramount in the design of the Raypak 992B. The boiler includes multiple safety controls and alarms to prevent overheating and maintain safe operating conditions. This diligence in safety ensures peace of mind for operators and reduces the risk of unexpected downtime.

In summary, the Raypak 992B stands out as a top choice for commercial heating solutions, combining high efficiency, advanced technology, and rugged construction. Its features cater to a wide range of heating needs while prioritizing safety and economy. With its impressive performance capabilities, the Raypak 992B continues to be a reliable partner for facilities seeking optimal heating solutions.
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