Raypak 992B manual

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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.

49.When power is sent to gas valve 1 it is also sent to time delay relay 1 (TD-1) which starts a 5-second countdown.

50.After the 5-second countdown from TD-1, 24 VAC is waiting at pin 3 of the stage 2 connections on the CPW board.

51.After closure of the stage 2 contacts Gas valve 2 is energized.

52.The stage 2 LED on the status display board is now illuminated.

53.Power is applied to pin 5 of the stage 3 connec- tions on the CPW board.

54.The temperature controller closes the stage 3 con- tacts at J3 on the CPW board.

55.Power is applied to the “TH” terminal of ignition module 2.

56.Once the “TH” signal is received at ignition module 2, the heater performs a 15 second pre-purge, then hot surface igniter 2 is energized by a 120 VAC signal from S-1 on ignition module 2 for approximately 30 seconds. (The hot surface ignit- er must draw greater than 3.1 amps while being energized or ignition lockout will occur after three tries.)

57.Once ignition module 2 determines that hot sur- face igniter two is operating properly, a 24 VAC signal is sent to energize gas valve 3.

58.The stage 3 LED on the status display board is now illuminated.

59.The gas coming through the stage 3 burners should ignite from the heat of hot surface igniter two and the flame should carry over from one burner to the other burners of stage 3. Remote flame sensor two is now trying to sense the flame. If the flame is not sensed within 4 seconds, the ignition module will shut down gas valve 3 and retry the hot surface igniter. During ignition retry the heater must perform a 15-second pre-purge and approximately a 30-second igniter warm-up before opening gas valve 3 again. The standard ignition module will attempt ignition a maximum of three times prior to ignition lockout.

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Contents Installation & Operating Instructions Page Contents Pay Attention to These Terms Product Receipt Before InstallationInstallations at Elevation Model IdentificationComponent Locations Component Locations BackValves General InformationModel Quantity Vent Size Gas Burners Blowers Model Burners per Valve Stages Fire at StageWater Time to Produce Serious Temp Burn General SafetyTime/Temperature Relationships in Scalds Equipment Base InstallationInstallation Codes StackingTable D Vent/Air Inlet Termination Clearances Clearances Indoor InstallationsOutdoor Installations Direct Vent Combustion and Ventilation AirReversing Air Filter Indoor UnitsTruSeal Combustion Air InstallationsConventional Combustion Air Supply All Air from Inside the BuildingGeneral Canadian InstallationsWater Piping Reversing Water ConnectionsRelief Valve Piping Hydrostatic Test Cold Water OperationPump Selection Temperature & Pressure GaugeHydronic Heating Air-Separation/Expansion Tank Pressure Drop in Feet of Head Feedwater RegulatorPiping Three-Way ValvesPotable Water and Space Heating Pool HeatingAutomatic Chlorinators and Chemical Feeders Winterizing Your HeaterPH of Water Gas SupplyPool/Spa Water Chemistry Water Hardness Total Dissolved SolidsModel Gas Supply ConnectionReversing Gas Supply Connection Table I Maximum Equivalent Pipe LengthGas Supply Pressure Electrical Power ConnectionsCheck the Power Source Field-Connected ControllersField Wiring Connection Making the Electrical ConnectionsOn-Off Wiring Connections Model Diameter Order Number VentingFlue Exhaust Tee Appliance CategoriesCombustion Exhaust Support of Vent StackVent Terminal Location Certified Combustion AirChanging the Flue Outlet InstallationsCanadian Installations Installation Venting Installation TipsVenting Configurations Natural Draft Vertical Venting CategoryCertified Vertical Venting Combustion Air Air Inlet Model TerminationCommon Venting System HeightHorizontal Through-the-Wall Venting Category Horizontal Through-the-Wall Venting CategoryVenting Direct Vent Horizontal Through- the-WallModel Certified Maximum Combustion Air Inlet EquivalentDirect Vent Vertical Direct Vent VerticalFreeze Protection Outdoor InstallationControls Heater Sequence of Operation Models 992B-1262BExternal Lights Color Indication Models 1532B 1802B Page Page Models 2002B 2342B Page Page Ignition Module High Limit Manual ResetFlow Switch Operating ControlHigh and Low Gas Pressure Switches Low Water Cut-Off OptionalUDB Fault History Pump Time DelayUDB Diagnostic Board Venting Appliance Categories 87%-Efficiency Boilers Special InstructionsWater Piping Condensate Management Vertical Venting CategoryVent Terminal Location 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-upStart-Up Blower AdjustmentMain Burner Adjustment Follow-Up Safety InspectionLeak Test Procedure Dual-Seat Gas Valves Pilot Turn-Down TestPost Start-Up Check Leak TestTo Turn Off Gas To Appliance OperationLighting Instructions Troubleshooting StepPreventive Maintenance Schedule MaintenanceSuggested Minimum Maintenance Schedule Annually WeeklySemi-Annually 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.

The Raypak 992B comes equipped with advanced technologies that enhance performance and ease of use. Among these technologies is the high-precision digital control system, which allows for accurate temperature regulation and monitoring. This feature ensures optimal performance and minimizes energy waste, further contributing to the unit's cost-effectiveness. The boiler also utilizes a modulating burner system, enabling it to adjust flame size based on real-time heating demands. This adaptability not only enhances efficiency but also improves overall comfort within a facility.

Another significant characteristic of the Raypak 992B is its robust construction. Built with durable materials designed to withstand demanding operating conditions, this boiler is engineered for long-lasting performance. Its compact design is an added benefit, facilitating installation in areas with limited space. The unit is also equipped with a stainless steel heat exchanger, which provides superior resistance to corrosion and enhances heat transfer efficiency.

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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