Raypak 302B Direct Vent Horizontal Through- the-Wall, Venting, Equivalent, Material Vent Length

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Model

Certified

 

Maximum

Combustion

Air Inlet

 

Air

Max. Length

Venting

Vent Size

Equivalent

No.

Intake Pipe

 

 

Material

 

Vent Length*

6”

8”

 

 

Material

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

302B

 

5”

70’

 

100’

N/A

 

 

 

 

402B

 

 

 

 

6”

Room Air

Galvanized

 

 

502B

 

 

Steel,

75’

 

 

 

 

 

Category III

 

40’

PVC,

 

652B

 

 

100’

 

 

Ducted

ABS,

40’

752B

 

8”

Combustion

CPVC

 

 

 

 

 

 

 

Air

 

 

 

902B

 

 

 

30’

80’

 

 

 

 

 

 

 

 

 

 

 

* Subtract 10 ft per elbow. Max. 3 elbows.

Maximum combustion air duct length terminated at 100 equivalent ft.

Table O: Category III Horizontal and Direct Venting

Use only the special gas vent pipes listed for use with Category III gas burning heaters, such as the AL29-4C stainless steel vents offered by Heat Fab Inc. (800- 772-0739), Protech System, Inc. (800-766-3473), Z-Flex (800-654-5600) or American Metal Products (800-423-4270). Pipe joints must be positively sealed. Follow the vent manufacturer’s installation instructions carefully.

Direct Vent - Horizontal Through- the-Wall

Note: When vertical height exceeds 25 ft,

consult factory prior to installation.

Fig. 26: Direct Vent - Horizontal Through-the-Wall

Installation

These installations utilize the heater-mounted blower to draw combustion air from outdoors and vent com- bustion products to the outdoors.

The total length of the through-the-wall flue cannot exceed 40 equivalent ft in length for the flue outlet. Each elbow used is equal to 10 ft of straight pipe. This will allow installation in one of the three following arrangements:

•40’ of straight flue pipe

•30’ of straight flue pipe and one elbow

•20’ of straight flue pipe and two elbows.

The total length of air supply pipe cannot exceed the distances listed in Table O. Each elbow used is equal to 10 ft of straight pipe. This will allow installation in any arrangement that does not exceed the lengths shown in Table O.

The flue direct vent cap is not considered in the over- all length of the venting system.

Care must be taken during assembly that all joints are sealed properly and are airtight.

The vent must be installed to prevent the potential ac- cumulation of condensate in the vent pipes. It is required that:

1.The vent must be installed with a slight downward slope of not more than 1/4 inch per foot of hori- zontal run to the vent terminal.

2.The vent must be insulated through the length of the horizontal run.

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Contents Installation & Operating Instructions Deletions None Contents Pay Attention to These Terms Model Identification Before InstallationInstallations at Elevation Product ReceiptComponent Locations Back Component LocationsGeneral Information Time/Temperature Relationships in Scalds General SafetyWater Time to Produce Serious Temp Burn Stacking InstallationInstallation Codes Equipment BaseOutdoor Installations Indoor InstallationsClearances Ft 91 cm within a Direct Vent Combustion and Ventilation AirIndoor Units Reversing Air FilterAll Air from Inside the Building InstallationsConventional Combustion Air Supply TruSeal Combustion AirReversing Water Connections Canadian InstallationsWater Piping GeneralCold Water Operation Relief Valve Piping Hydrostatic TestCold Water Starts Temperature & Pressure GaugeHydronic Heating Pump SelectionThree-Way Valves Pressure Drop in Feet of Head Feedwater RegulatorPiping Air-Separation/Expansion TankPool Heating Potable Water and Space HeatingWater Hardness Automatic Chlorinators and Chemical FeedersWinterizing Your Heater Pool/Spa Water ChemistryTotal Dissolved Solids PH of WaterTable K Maximum Equivalent Pipe Length Gas SupplyGas Supply Connection ModelGas Supply Pressure Electrical Power ConnectionsField-Connected Controllers Check the Power Source Field Wiring ConnectionMaking the Electrical Connections Stage Tankstat Appliance Categories VentingFlue Exhaust Tee Model Diameter Order NumberVent Terminal Location Support of Vent StackCanadian Installations InstallationsChanging the Flue Outlet Natural Draft Vertical Venting Category Venting Installation TipsVenting Configurations InstallationHeight TerminationCommon Venting System Certified Vertical Venting Combustion Air Air InletHorizontal Through-the-Wall Venting Category Horizontal Through-the-Wall Venting CategoryEquivalent Direct Vent Horizontal Through- the-WallModel Certified Maximum Combustion Air Inlet VentingDirect Vent Vertical Direct Vent VerticalControls Outdoor InstallationFreeze Protection Models 302B-902B Heater Sequence of OperationExternal Lights Color Indication Code Condition Ignition ModuleLow Water Cut-Off Optional High Limit Manual ResetFlow Switch High and Low Gas Pressure SwitchesUDB Fault History UDB Diagnostic BoardPump Time Delay Table R UDB Fault Messages Model 10F 20F 30F Min. Flow Max Flow Gpm 87%-Efficiency Boilers Special InstructionsWater Piping Venting Appliance CategoriesVent Terminal Location Vertical Venting CategoryCondensate Management 752BE Combustion Air 902BE 30’ 80’ Certified Maximum Combustion Air Air Inlet Model VentingDirect Vent Horizontal Through- the-Wall ABS Cpvc Wiring Diagram Pre Start-up START-UPMain Burner Adjustment Blower AdjustmentStart-Up Pilot Turn-Down Test Safety InspectionLeak Test Procedure Dual-Seat Gas Valves Follow-UpLeak Test Post Start-Up CheckLighting Instructions OperationTo Turn Off Gas To Appliance Step TroubleshootingSuggested Minimum Maintenance Schedule MaintenancePreventive Maintenance Schedule As Required WeeklySemi-Annually AnnuallyInside Air Contamination AppendixLimited Parts Warranty HI Delta Types H and WH Limited Parts Warranty HI Delta Type P START-UP Checklist for FAN-ASSISTED Raypak Products Important Instructions for the Commonwealth of Massachusetts
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302B, 902B specifications

Raypak is a prominent name in the heating industry, particularly known for its advanced technology and robust design in residential and commercial heating solutions. Two of their notable models, the Raypak 302B and 402B, exemplify innovation and efficiency in hydronic heating systems, designed to meet diverse needs while ensuring optimal performance.

The Raypak 302B and 402B are high-efficiency boilers that utilize gas-fueled systems. The 302B model has a heating capacity of 302,000 BTU/h, while the 402B boasts a maximum capacity of 402,000 BTU/h. This range of heating output makes these models suitable for a variety of applications, from residential heating needs to larger commercial spaces that require a reliable heat source.

One of the standout features of the Raypak 302B and 402B is their use of fire-tube heat exchanger technology. This design promotes efficient heat transfer and allows for lower emissions, thus minimizing the environmental impact. The fire-tube design also contributes to a longer lifespan and reduced maintenance costs, making these boilers a cost-effective solution over time.

Equipped with advanced control systems, the Raypak 302B and 402B ensure precise temperature regulation and improved energy usage. The digital display provides real-time feedback and diagnostics, enhancing user experience and simplifying troubleshooting. These models are also compatible with various building management systems, providing users with versatility in integration to optimize building performance.

In addition to their technological advancements, these boilers are designed with user safety and convenience in mind. They include features such as built-in safety controls, easy access for service and maintenance, and a compact footprint to fit into tight spaces. Their robust construction ensures durability, which is crucial for systems that operate under high demand.

Moreover, both models have been engineered to succeed in various climates, making them reliable choices for users in diverse geographical locations. With their energy-efficient operation, reliable performance, and advanced features, the Raypak 302B and 402B embody quality and innovation in the heating market, ensuring comfortable environments while lowering energy costs and environmental footprints.
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