Raypak 503-2003 manual Controls, Freeze Protection, Operating Modes

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NOTE: Condensate can freeze on the vent cap. Frozen condensate on the vent cap can result in a blocked flue condition.

Fig. 29: Outdoor Venting

Freeze Protection

CAUTION: Risk of electric shock: More than one disconnect switch may be required to de-energize the equipment before servicing.

The Raypak modulating temperature control is pro- vided to maintain the desired system water temperature. The control has various modes of opera- tion which are listed on the following pages.

Setpoint: The intended system supply temperature.

Deadband: Deadband is a band of temperature sens- ing where no action occurs. All temperature controllers have a deadband and the purpose is to prevent short- cycling of the heater. The on-board temperature controller has a deadband of 2ºF around the differen- tial.

Differential: A heat source must be operated with a temperature differential in order to prevent short- cycling. The temperature differential is divided around the “target” temperature or set-point. The Call For Heat (CFH) contact will close in the controller when the water temperature is below the target temperature by 1/2 of the differential setting, and will open when the water temperature is above the target temperature by 1/2 of the differential setting. See Fig. 30.

The Raypak electronic temperature control includes a freeze protection feature. In the event the temperature drops below 40°F at any of the boiler temperature sen- sors, the pump is turned on and will remain on until the temperature at all boiler sensors rises to 45°F.

Controls

WARNING: Installation, adjustment and service of heater controls, including timing of various operating functions, must be performed by a qualified installer, service agency or the gas supplier. Failure to do so may result in control damage, heater malfunction, property damage, personal injury, or death.

WARNING: Turn off the power to the heater before installation, adjustment or service of any heater controls. Failure to do so may result in board damage, heater malfunction, property damage, personal injury, or death.

CAUTION: This appliance has provisions to be connected to more than one supply source. To reduce the risk of electric shock, disconnect all such connections before servicing.

30

Fig. 30: Differential Graph

Operating Modes

Mode 1 (Not supported) – Setpoint operation using primary piping. The heater outlet water temperature is controlled to the boiler target setpoint.

Mode 2 – Setpoint operation using primary/secondary piping. The control operates the heater to satisfy a remote system sensor. The heater is turned off based on boiler max and boiler differential (factory default). See Fig. 31.

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Contents Do so may result in an explosion or fire Reference Catalog no .53G Effective Replaces 241288 RevPage Contents Pay Attention to These Terms Product Receipt Before InstallationInstallations at Elevation Model IdentificationComponent Locations General InformationGeneral Safety Time/Temperature Relationships in ScaldsWater Time to Produce Serious Temp Burn Indoor Installations InstallationInstallation Codes Equipment BaseOutdoor Installations Combustion and Ventilation AirIndoor Units Table E Vent/Air Inlet Termination Clearances Air Filter InstallationsConventional Combustion Air Supply Direct VentCanadian Installations Water PipingGeneral Relief Valve Piping Temperature & Pressure Gauge Hydrostatic TestCold Water Operation Feedwater Regulator Hydronic HeatingPump Selection Cold Water StartsPiping Air-Separation/Expansion TankModel 20F 30F 40F Min. Flow Max. Flow Gpm Potable Water and Space Heating Three-Way ValvesDomestic Hot Water Pool HeatingMake final adjustments when pool water approaches Pool/Spa Water Chemistry Winterizing Your HeaterExceed 5 ppm Gas Supply Pressure Gas SupplyGas Supply Connection Automatic Chlorinators Chemical FeedersManifold Gas Pressure Model Electrical Power ConnectionsModel In. NPT 4 in. NPT 2 in. NPT High Fire ValuesCheck the Power Source Field-Connected ControllersMaking the Electrical Connections Field Wiring Connection VentingAppliance Categories Installations Support of Vent StackVent Terminal Location Canadian Installations Venting Installation TipsVenting Configurations InstallationTermination CpvcVent VolumeCommon Venting Model Pressure Flue ProductsHorizontal Through-the-Wall Direct Venting Category Horizontal Through-the-Wall VentingCombustion Air Air Inlet Horizontal Max. Length** ft Vent Direct Vent-VerticalModel Certified 10 ØOutdoor Installation Controls Freeze ProtectionOperating Modes Mode 2 Primary/Secondary Piping Mode 7 Primary/Secondary Piping with External Target Temp Modes Default Setting Range 10 VDC 20 mA10 VDC 20 mA Boiler Target Definitions Number Field Type Fault Description OperationRank Ignition Module High Limit-Manual ResetHeater Sequence of Operation Code ConditionFlow Switch High Limit-Auto Reset OptionalModulating Temperature Control High & Low Gas Pressure Switches OptionalAir Pressure Switch Blocked Vent SwitchUDB Diagnostic Board Wiring Diagrams Models Models Pre Start-up Check START-UPPre Start-up Initial Start-upPreparation Start-UpBlower Check Model Amp Draw Setting Safety InspectionModel Air Pressure Setting Setting in. WC Manifold CheckLeak Test Procedure Dual-Seat Gas Valve Follow-UpOperation Lighting InstructionsPost Start-Up Check To Turn Off Gas To Appliance Troubleshooting StepMaintenance UDB Fault HistorySuggested Minimum Maintenance Schedule Weekly Preventive Maintenance SchedulePeriodically Semi-AnnuallyFilter Maintenance Filter ReplacementAs Required Appendix Inside Air ContaminationImportant Instructions for the Commonwealth of Massachusetts Limited Parts Warranty MVB Types H and WH START-UP Checklist for FAN-ASSISTED Raypak Products
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503-2003 specifications

The Raypak 503-2003 is a notable entry in the world of water heating solutions, renowned for its efficiency and reliability in both residential and commercial settings. This model is designed to provide exceptional performance while maintaining ease of use and minimization of environmental impact.

One of the standout features of the Raypak 503-2003 is its advanced heating technology. The unit utilizes a durable, copper heat exchanger which ensures quick and efficient heating of water. This heat exchanger is known for its ability to transfer heat effectively, leading to reduced energy consumption and lower utility bills. The design also allows for a seamless operation, ensuring that the system heats water swiftly without sacrificing performance.

In addition to its efficient heating capabilities, the Raypak 503-2003 is equipped with innovative controls. The digital control panel allows users to easily set and adjust the desired water temperature. This feature provides a level of convenience that simplifies operation while enhancing user experience. Furthermore, the smart technology employed in the unit ensures that it operates within optimal parameters, avoiding unnecessary energy expenditure.

Durability is another hallmark of the Raypak 503-2003. Built with heavy-duty components, this water heating solution is designed to withstand the rigors of continuous use. The rugged construction ensures longevity, making it a cost-effective investment for homeowners and businesses alike. Moreover, the unit is designed to be resistant to corrosion and wear, further extending its lifespan and reliability.

The energy efficiency of the Raypak 503-2003 is a crucial characteristic that sets it apart from competitors. Rated with a high efficiency score, this model contributes to lower emissions and is environmentally friendly. It adheres to various energy standards, making it a suitable choice for those looking to reduce their carbon footprint while enjoying reliable water heating.

Noise reduction is another important feature of the Raypak 503-2003. Designed with quiet operation in mind, the unit operates with minimal noise pollution, allowing for a pleasant environment in both residential and commercial spaces.

In summary, the Raypak 503-2003 combines advanced heating technology, user-friendly controls, durability, and energy efficiency into a robust water heating system. This makes it an excellent choice for those in need of dependable and sustainable heating solutions. Whether for daily home use or for larger commercial applications, the Raypak 503-2003 stands out as a leader in its class.
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