Raypak 302A-902A manual Direct Vent Vertical

Page 32

For installations in extremely cold climate, it is re- Direct Vent - Vertical quired that:

1. The vent must be installed with a slight upward slope of not more than 1/4 inch per foot of hori- zontal run to the vent terminal. In this case, an ap- proved condensate trap must be installed per ap- plicable codes.

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

Termination

The flue direct vent cap MUST be mounted on the ex- terior of the building. The direct vent cap cannot be installed in a well or below grade. The direct vent cap must be installed at least 1 ft above ground level and above normal snow levels.

The direct vent cap MUST NOT be installed with any combustion air inlet directly above a direct vent cap. This vertical spacing would allow the flue products from the direct vent cap to be pulled into the combus- tion air intake installed above.

This type of installation can cause non-warrantable problems with components and poor operation of the heater due to the recirculation of flue products. Multi- ple direct vent caps should be installed in the same horizontal plane with a 4 ft clearance from the side of one vent cap to the side of the adjacent vent cap(s).

Combustion air supplied from outdoors must be free of particulate and chemical contaminants. To avoid a blocked flue condition, keep the vent cap clear of snow, ice, leaves, debris, etc.

WARNING: No substitutions of flue pipe or vent cap material are allowed. Such substitutions would jeopardize the safety and health of inhabitants.

Note: When vertical height exceeds 25 ft, consult

factory prior to installation.

Fig. 27: Direct Vent - Vertical

Installation

These installations utilize the heater-mounted blower to draw combustion air from outdoors and force the heated flue products through the vent pipe under posi- tive pressure. The vent material must be in accor- dance with the above instructions for vent materials. Vent material must be listed by a nationally recognized test agency.

The connection from the appliance flue to the stack must be as direct as possible and should be the same size or larger than the vent outlet.

See Table L for Category I venting guidelines.

It is recommended that in colder climates, the intake vent be insulated.

Termination

The flue terminal should be vertical and should termi-

The stainless steel flue direct vent cap must be fur-

nate outside the building at least 2 ft above the high-

nished by the heater manufacturer in accordance with

est point of the roof within 10 ft. The vent cap should

its listing (sales order option D-15).

have a minimum clearance of 4 ft horizontally from and

 

Use only the special gas vent pipes listed for use with

in no case above or below (unless a 4 ft horizontal dis-

tance is maintained) electric meters, gas meters, reg-

Category III gas burning heaters, such as the AL29-4C

ulators and relief equipment. The distance of the vent

stainless steel vents offered by Heat Fab Inc. (800-

terminal from adjacent public walkways, adjacent

772-0739), Protech System, Inc. (800-766-3473) or Z-

buildings, open windows and building openings must

Flex (800-654-5600). Pipe joints must be positively

be consistent with the NFGC (U.S.) or B149.1

sealed. Follow carefully the vent manufacturer’s instal-

(Canada).

lation instructions.

 

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Contents Installation and Operating Instructions Page Contents Pay Attention to These Terms Before Installation Product ReceiptModel Identification Ratings and CertificationsComponent Locations Component Locations BackModel # Burners Valve Firing Per Valve Staging General InformationModel # Burners per Stages Fire at Valve Water Time to Produce Serious Temp Burn General SafetyTime/Temperature Relationships in Scalds Installation Installation CodesEquipment Base StackingClearances Indoor InstallationsOutdoor Installations Installations1 Canadian Installations2 Combustion and Ventilation Air Indoor UnitsReversing Air Filter Direct VentInstallations Conventional Combustion Air SupplyTruSeal Combustion Air All Air from Inside the BuildingCanadian Installations Water PipingGeneral Reversing Water ConnectionsRelief Valve Piping Hydrostatic Test Cold Water OperationTemperature & Pressure Gauge Hydronic HeatingPump Selection Min. Flow Max Flow GpmPressure Drop in Feet of Head Feedwater Regulator PipingAir-Separation/Expansion Tank Three-Way ValvesPotable Water and Space Heating Pool HeatingAutomatic Chlorinators and Chemical Feeders Winterizing Your HeaterGas Supply Pool/Spa Water Chemistry Water HardnessPH of Water Total Dissolved SolidsTable J Maximum Equivalent Pipe Length Gas Supply ConnectionReversing Gas Supply Connection Electrical Power Connections Check the Power SourceGas Supply Pressure Field-Connected ControllersField Wiring Connection Making the Electrical ConnectionsWiring Connections Venting Appliance CategoriesSupport of Vent Stack Vent Terminal LocationDirect Venting Horizontal Through Stainless SteelChanging the Flue Outlet InstallationsCanadian Installations Venting Installation Tips Venting ConfigurationsInstallation Natural Draft Vertical Venting CategoryTermination Common Venting SystemModel Venting Vent Size Height Intake Pipe Max. Length Min MaxHorizontal Through-the-Wall Venting Category Horizontal Through-the-Wall Venting CategoryMaterial Direct Vent Horizontal Through- the-WallMax. Length Venting Vent Size Equivalent Intake Pipe Direct Vent Vertical Freeze Protection Outdoor InstallationControls Heater Sequence of Operation Models 302A, 402A, 502A, 652A, 752A and 902AInternal Lights Color Indication Auto Reset High Limit Red Auto reset optionExternal Lights Color Indication Ignition Module Code ConditionHigh Limit Manual Reset Flow SwitchHigh and Low Gas Pressure Switches Operating ControlHigh/Low Gas Pressure Switch 87%-Efficiency Boilers Special Instructions Water Piping Venting Appliance CategoriesModel 10F 20F 30F Min. Flow Max Flow Gpm Direct Venting Horizontal Through AL29-4CCondensate Management Vertical Venting CategoryVent Terminal Location Certified Maximum Combustion Air Air Inlet Model Venting Material Vent Length100’ Ducted 40’ 752AE Combustion Air 902AE 30’ 80’Direct Vent Horizontal Through- the-Wall Direct Vent Vertical Certified Vertical Venting Combustion Air Air Inlet302A 100’ 402A Galvanized Steel 502A 75’ Category 25’ 100’ 40’ 752A 902AWiring Diagram START-UP Pre Start-upStart-Up Blower AdjustmentMain Burner Adjustment Safety Inspection Leak Test Procedure Dual-Seat Gas ValvesFollow-Up Pilot Turn-Down TestPost Start-Up Check Leak TestTo Turn Off Gas To Appliance OperationLighting Instructions Troubleshooting StepPreventive Maintenance Schedule MaintenanceSuggested Minimum Maintenance Schedule Weekly Semi-AnnuallyAnnually As RequiredAppendix Inside Air ContaminationLimited Parts Warranty HI Delta Types H and WH Limited Parts Warranty HI Delta Type P

302A-902A specifications

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