Raypak 503-2003 manual Optional Construction Air Filter, Direct Vent, TruSeal Combustion Air

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SECTION C: Installation

CAUTION: Combustion air must not be contaminated by corrosive chemical fumes which can damage the heater and void the warranty. (See Section H.)

NOTICE: It is recommended that the intake vent be insulated to minimize sweating.

Optional Construction Air Filter

An optional construction air filter is available for use. The filter should be removed after construction is fin- ished to allow for unrestricted air flow to the heater.

Direct Vent

If outside air is drawn through the intake pipe directly to the unit for combustion:

1.Install combustion air direct vent in accordance with Fig. 24 (horizontal) or Fig. 25 (vertical) of this manual (pages 26 & 27 respectively).

2.Provide adequate ventilation of the space occupied by the heater(s) by an opening(s) for ventilation air at the highest practical point communicating with the outdoors. The total cross-sectional area shall be at least 1 in.2 of free area per 20,000 BTUH (111 mm2 per kW) of total input rating of all equipment in the room when the opening is communicating directly with the outdoors or through vertical duct(s). The total cross-sectional area shall be at least 1 in.2 of free area per 10,000 BTUH (222 mm2 per kW) of total input rating of all equipment in the room when the opening is communicating with the outdoors through horizontal duct(s).

3.In cold climates, and to mitigate potential freeze- up, Raypak highly recommends the installation of a motorized sealed damper to prevent the circula- tion of cold air through the heater during non- operating hours.

TruSeal™ Combustion Air

In addition to the 3 previous steps, combustion air may be ducted directly to the heater by using PVC, CPVC or sealed single-wall galvanized ducting. The duct will attach directly to the air collar located on the rear of the heater, using three or four sheet metal screws (not sup- plied) equally positioned around the circumference of the duct. The screen assembly should be removed be- fore attaching any air duct to the heater. The screws and duct connection point must be sealed with RTV (not supplied). TruSeal is generally used when damag- ing contaminants are present in the mechanical room.

All ducting should be self-supported.

CAUTION: Use TruSeal combustion air if damaging airborne contaminants are or may be present in the heater area. See Section H of this manual regarding air contamination.

Conventional Combustion Air Supply

U.S. Installations

All Air from Inside the Building

The confined space shall be provided with TWO per- manent openings communicating directly with an additional room(s) of sufficient volume so that the combined volume of all spaces meets the criteria for a room large in comparison (NFGC). The total input of all gas utilization equipment installed in the combined space shall be considered in making this determination. Each opening shall have a minimum free area of 1 in.2 per 1,000 BTUH (2,225 mm2 per kW) of the total input rating of all gas utilization equipment in the confined space, but not less than 100 in.2 (645 cm2). One open- ing shall commence within 12 in. (305 mm) of the top, and one opening shall commence within 12 in. (305

mm)of the bottom of the enclosure. The minimum dimension of air openings shall be not less than 3 in. (76 mm) in any direction.

All Air from Outdoors

The confined space shall communicate with the out- doors in accordance with one of the methods below. The minimum dimension of air openings shall not be less than 3 in. (76 mm) in any direction. Where ducts are used, they shall be at least of the same cross- sectional area as the net free area of the openings to which they connect.

1.Two permanent openings, one commencing within 12 in. (305 mm) of the top, and one com- mencing within 12 in. (305 mm) of the bottom of the enclosure, shall be provided. The openings shall communicate directly, or by ducts, with the outdoors or spaces (crawl or attic) that freely communicate with the outdoors.

a.Where directly communicating with the out- doors or where communicating to the outdoors through vertical ducts, each opening shall have a minimum free area of 1 in.2 per 4,000 BTUH (550 mm2 per kW) of total input rating of all equipment in the enclosure.

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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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