Raypak 1005 Conventional Combustion Air Supply, Canadian Installations, All Air from Outdoors

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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 com- bined 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 determina- tion. 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 con- fined space, but not less than 100 in.2 (645 cm2). One opening 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 mini- mum 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 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 com- municate with the outdoors.

a.Where directly communicating with the out- doors or where communicating to the outdoors through vertical ducts, each open- ing 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.

b.Where communicating with the outdoors through horizontal ducts, each opening shall have a minimum free area of 1 in.2 per 2,000 BTUH (1,100 mm2 per kW) of total input rat- ing of all equipment in the enclosure.

2.One permanent opening, commencing within 12 in. (305 mm) of the top of the enclosure, shall be permitted where the equipment has clearances of at least 1 in. (25 mm) from the sides and back and 6 in. (152 mm) from the front of the appliance. The opening shall directly communicate with the out- doors or shall communicate through a vertical or horizontal duct to the outdoors or spaces that freely communicate with the outdoors, and shall have a minimum free area of:

a.1 in.2 per 3,000 BTUH (740 mm2 per kW) of the total input rating of all equipment located in the enclosure, and

b.Not less than the sum of the areas of all vent connectors in the confined space.

WARNING: Do not use the “one permanent opening” method if the equipment room is under negative pressure conditions.

Canadian Installations

CAUTION: All combustion air must be drawn from the air outside of the building; the mechanical equip- ment room must communicate directly with the outdoors.

1.Ventilation of the space occupied by the heater shall be provided by an opening(s) for ventilation air at the highest practical point communicating with the outdoors. The total cross-sectional area of such an opening(s) shall be at least 10% of the area required in 2. and 3. (below), but in no case shall the cross-sectional area be less than 10 in.2 (65 cm2).

2.For heaters using a barometric damper in the vent system there shall be a permanent air supply opening(s) having a cross section area of not less than 1 in.2 per 7,000 BTUH (320 mm2 per kW) up to and including 1 million BTUH, plus 1 in.2 per 14,000 BTUH (160 mm2 per kW) in excess of 1 million BTUH. This opening(s) shall be either located at or ducted to a point not more than 18 in. (450 mm) nor less than 6 in. (152 mm) above the floor level. The duct can also “goose neck” through the roof. The duct is preferred to be straight down and terminated 18 in. (450 mm) from the floor, but not near piping. This air supply opening require- ment shall be in addition to the air opening for ventilation air required in 1. (above).

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Contents Installation & Operating Instructions Page Contents Pay Attention to These Terms Installations at Elevation Before InstallationProduct Receipt Model IdentificationGeneral Information Component LocationsGas Vent Size Conn Input Max MinTime/Temperature Relationships in Scalds General SafetyWater Time to Produce Serious Temp Burn Installation Codes InstallationIndoor Installations Equipment BaseCombustion and Ventilation Air Outdoor InstallationsIndoor Units Heater Min. Clearance Minimum From CombustibleTable E Vent/Air Inlet Termination Clearances Direct Vent Combustion Air FilterRemove the Debris Screen TruSeal Combustion AirCanadian Installations InstallationsConventional Combustion Air Supply All Air from Inside the BuildingTemperature & Pressure Gauge Relief Valve Installation and PipingWater Piping GeneralHydronic Heating Fitting Type Equivalent Length ft 2 NPT Domestic Hot WaterPool Heating Combined Potable Water and Space HeatingAutomatic Chlorinators and Chemical Feeders Winterizing Your Heater Pool/Spa Water ChemistryGas Supply Connection Gas SupplyWater Hardness Gas Supply Pressure Electrical Power ConnectionsMaking the Electrical Connections Check the Power SourceSupport of Vent Stack Field Wiring ConnectionAppliance Categories Vent Terminal Location InstallationsVenting Configurations Venting Installation TipsCanadian Installations InstallationTotal Effective Combustion Air Air Inlet CertifiedLength Max. Length* ftCommon Venting Model Vent Size Volume Flue ProductsHorizontal Through-the-Wall Venting Horizontal Through-the-Wall and Direct Venting CategoryDirect Vent Vertical Direct Vent-VerticalOutdoor Venting Outdoor InstallationPVC vent assembly instructions CleaningFreeze Protection PVC Venting OptionPVC Vent Adapter Controls Termination using Adapter ThimbleDifferential Graph Operating ModesBoil Target 78F Boil Max 86F Boil Min 70F ‘Burner’ Delay 10 VDC 20 mA Modes Default Setting Range10 VDC 20 mA Boiler Target Definitions Operation Number Field Type Fault DescriptionRank Ignition Module Heater Sequence of OperationHigh Limit-Auto Reset Optional High Limit-Manual ResetFlow Switch Code ConditionHigh & Low Gas Pressure Switches Optional Modulating Temperature ControlLow Water Cut-Off Optional UDB Diagnostic Board Air Pressure SwitchBlocked Vent Switch Condensate Float SwitchWiring Diagrams Models 1005 Model Pre Start-up START-UPPre Start-up Check Preparation Initial Start-upStart-Up Required toolsModel No Amp Draw Setting Model No Net Blower Suction Setting In. WCBlower Check Manifold CheckLeak Test Procedure Dual-Seat Gas Valve Safety InspectionFinishing Follow-UpGAS Post Start-Up CheckLighting Instructions OperationTo Turn Off Gas To Appliance Step TroubleshootingUDB Fault History MaintenanceSuggested Minimum Maintenance Schedule Periodically Preventive Maintenance ScheduleWeekly Semi-AnnuallyInside Air Contamination AppendixAs Required Important Instructions for the Commonwealth of Massachusetts Models Limited Parts Warranty Xtherm Types H and WHLimited Parts Warranty Xtherm Types WHP START-UP Checklist for FAN-ASSISTED Raypak Products Page
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Raypak is a prominent name in the heating industry, known for its innovative and efficient heating solutions for residential and commercial applications. The models 2005, 1005, and 1505 are notable offerings from Raypak, each designed to provide reliable performance, energy efficiency, and user-friendly operation.

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