Raypak 503-2003 manual Ignition Module

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SECTION C: Installation

When the 24 VAC signal is sent from the flow switch to P4-9, the same signal then de-energizes the coil of the time delay relay to remove a heat demand from the modulating temperature control and restart the ignition sequence after the five- second time delay.

Upon ignition lockout, the module energizes the lockout relay and sends a 24 VAC signal to pin P4-12 (ignition lockout) of the UDB board.

17.When 24 VAC is received at F1 of the ignition module, it is then routed to the “TH” terminal of the ignition module.

18.After 24 VAC is received at TH on the ignition module, the contacts between pins F1 and F2 close and send 24 VAC to pin J5-6 of the UGB board.

A signal must be received at this terminal to en- able output to the blower.

19.A 24 VAC signal is sent from J6-1 to the blower.

20.The blower is controlled by a PWM (pulse width modulation) signal sent from J6-4 to start the blower operating at 50% speed.

The combustion air blower will operate at 50% of capacity for approximately ninety (90) seconds be- fore the modulating signal from the temperature control will control the blower speed in relation- ship to the system water temperature.

21.Once sufficient air pressure is achieved in the heater and the air pressure switch closes the NO contacts, 24 VAC is sent to the heater interlock connection.

If air pressure is insufficient or lost during heater operation, a 24 VAC signal is sent from the NC contacts of the air pressure switch to pin P4-10 of the UDB board to indicate insufficient air pressure.

When the 24 VAC signal is sent to P4-10, the same signal then energizes the coil of the time de- lay relay to remove a heat demand from the temperature controller and restart the ignition se- quence after the five-second time delay.

22.After receiving 24 VAC at the heater interlock, power then travels to the P Switch terminal of the ignition module.

The ignition module employs a 15 second pre- purge before the next sequence.

23.After 15 seconds of combustion chamber pre- purge, pin S1 sends 120 VAC to the Hot Surface Igniter.

The Hot Surface Igniter will be energized for ap- proximately 30 seconds and must exceed 3.1 amp draw during heat up.

24.During HSI heat-up, the UGB board is monitoring current draw across pins J4-1 and J4-3.

25.Once the ignition module determines the proper operation of the Hot Surface Igniter, a 24 VAC signal is output from Valve pin on the ignition module to energize the gas valve.

26.A 24 VAC signal is sent to the blue LED on the front of the heater to signify “Burner Firing” and to pin J5-2 on the UGB board to prove flame.

27.The gas valve is energized and the burner ignites.

28.The remote sensor is now trying to sense the flame. If the flame is not rectified within 4 seconds, the ignition module will shut down the gas valve and lock out.

29.When burner flame is rectified, the gas valve will remain at 50% fire for the remainder of the ninety (90) seconds after CFH and then modulate in rela- tionship to the output signal to the combustion air blower from the modulating temperature control.

30.When the CFH is satisfied, the heater will return to a standby condition awaiting the next CFH.

Ignition Module

When additional heat is needed, the combustion air blower starts to purge air from the combustion chamber for 15 seconds. On proof-of-air flow, the air-proving switch closes and the igniter is energized. To ensure safe operation, the gas valve cannot open until the ig- niter is verified. The main burner is automatically lit when the device is powered and pre-purged. The heater performs its own safety check and opens the main valve only after the igniter is proven to be capable of ignition.

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Contents Installation Operating Instructions Page Table of Contents PAY Attention to These Terms Before Installation Section aProduct Receipt Model IdentificationInstallations at Elevation Component LocationsGeneral Information Water Gas Vent Size Model Conn InputHot Water Supply General Safety Section BTime/Temperature Relationships in Scalds Water Temp Time to Produce Serious BurnInstallation Installation CodesSection C Equipment BaseInstallations1 Canadian Installations2 Outdoor Installations Heater Min. Clearance Recommended From Combustible ServiceCombustion and Ventilation Air Indoor UnitsInstallations Optional Construction Air FilterDirect Vent TruSeal Combustion AirCanadian Installations Water PipingGeneral Relief Valve Piping Hydrostatic Test Cold Water OperationCold Water Starts Temperature & Pressure Gauge Cold Water RunModel 20F∆T 30F∆T 40F∆T Min. Flow Max Flow Gpm ∆P ft ∆P ft GpmHydronic Heating Domestic Hot WaterPotable Water and Space Heating Pool HeatingAutomatic Chlorinators and Chemical Feeders Winterizing Your HeaterGas Supply Pool/Spa Water ChemistryWater Hardness PH of WaterGas Supply Connection Gas Supply PressureModel NPT 4 NPT 2 NPT Electrical Power Connections Check the Power SourceField-Connected Controllers Field Wiring Connection Making the Electrical ConnectionsVenting Appliance CategoriesSupport of Vent Stack Inlet MaterialCanada Installations Vent Terminal LocationVenting Installation Tips Venting ConfigurationsInstallation Vertical Venting CategoryVent Size Volume Model Pressure Flue Products In. WC TerminationCommon Venting Horizontal Through-the-Wall Direct Venting Category Typical Common VentingHorizontal Through-the-Wall Direct Venting Direct Vent Vertical Direct Vent VerticalOutdoor Installation ControlsFreeze Protection Operating Modes DefinitionsOperation Modes Default Range Modulating Temperature Control User InterfaceHeater Sequence of Operation Model 503Model 1753 Section C Installation Ignition Module High Limit Manual Reset High Limit Auto Reset OptionalFlow Switch Code ConditionModulating Temperature Control High and Low Gas Pressure Switches OptionalAir Pressure Switch Low Water Cut-Off OptionalBlocked Vent Switch UDB Diagnostic BoardWiring Diagrams ModelsModels Section C Installation Section D Start-upPre Start-up Blower Adjustment Start-UpPre Start-up Check Initial Start-upManifold Adjustment Safety Inspection Leak Test Procedure Dual-Seat Gas ValveFollow-Up Leak Test Procedure Post Start-Up CheckSection D Start up Section E OperationLighting Instructions To Turn Off Gas To ApplianceSection E Operation Troubleshooting Section FUDB Fault History Maintenance Suggested Minimum Maintenance ScheduleSection G Preventive Maintenance Schedule Section H AppendixInside Air Contamination Limited Parts Warranty MVB Types H and WH
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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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