Raypak 750, 500, 1000 Section C Combustion and Ventilation AIR, Direct Combustion AIR

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SECTION C: COMBUSTION AND VENTILATION AIR

COMBUSTION AND VENTILATION AIR (Indoor Units)

The boiler must be supplied with sufficient quantities of non-contaminated air to support proper combustion and equip- ment ventilation. Combustion air can be supplied via conventional venting, where combustion air is drawn from the area immediately surrounding the boiler, or via direct vent, where combustion air is drawn directly from outside. All installa- tions must comply with the requirements of NFGC for U.S., CAN/CGA B 149.1 and .2 for Canada, and all local codes.

DIRECT COMBUSTION AIR

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

1.Install combustion air direct vent in accordance with Section J of this manual.

2.Provide for adequate ventillation of the space occupied by the boiler(s) by an opening(s) for ventillation air at the highest practical point communicating with the outdoors. The total cross sectional area shall be at least one (1) square inch of free area per 20,000 BTUH 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 one (1) square inch of free area per 10,000 BTUH 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 circulation of cold air through the boiler during the non-operating hours.

CONVENTIONAL COMBUSTION AIR SUPPLY (FOR U.S. INSTALLATION ONLY)

All Air from Inside the Building. If all combustion air is drawn from the air inside the building (the mechanical equipment room does not receive air from outside):

1.The mechanical equipment room must be provided with two permanent openings communicating directly with additional room(s) of sufficient volume so that the combined volume of all spaces meets the criteria for an unconfined space. (An unconfined space is defined as a space whose volume is more than 50 cubic feet per 1,000 BTUH of the aggregate input rating of all appliances installed in that space.)

2.Each opening must have a minimum free area of one (1) square inch per 1,000 BTUH of the total input rating of all gas utilization equipment in the mechanical equipment room.

3.One opening must commence within twelve (12) inches of the top, and one opening must commence within twelve (12) inches of the bottom of the room.

4.Refer to NFGC, Part 5, for additional information.

All Air from Outdoors. If all combustion air is drawn from the air outside the building (the mechanical equipment room directly communicates with the outdoors), either of the following two methods can be used:

Method 1:

1.The mechanical equipment room must be provided with two permanent openings, one commencing within (twelve) 12 inches of the top, and one commencing within twelve (12) inches of the bottom of the room.

2.The openings must communicate directly, or by ducts, with the outdoors.

3.Each opening must have a minimum free area of one (1) square inch per 4,000 BTUH of total input rating of all equipment in the room when the opening is communicating directly with the outdoors or through vertical ducts. The minimum free area required for horizontal ducts is one (1) square inch per 2,000 BTUH of total input rating to all the equipment in the room.

4.Refer to NFGC, Part 5, for additional information.

Refer to Appendix A for additional information about combustion air quality.

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Contents For Your Safety For Your Safety What to do if YOU Smell GASPage Table of Contents Section a Before Installing the Boiler Product ReceiptModelidentification Ratings and CertificationFigure A-1 Advanced Design Boiler Component LocationsInstallation Codes Section B Boiler InstallationEquipment Base Figure B-1 Outdoor Installation Minimum Clearances Section C Combustion and Ventilation AIR Direct Combustion AIRPage Section D Water Piping General LOW Temperature SystemTemperature & Pressure Gauge Reliefvalve PipingSection E Hydronic Heating Piping Pump SelectionAIR-SEPARATION/EXPANSION Tank Pressure Drop in Feet of Head Feedwater RegulatorPiping Heating Boilers THREE-WAY ValvesSingle Boiler PRIMARY/SECONDARY Piping with CHX DUAL-BOILER PRIMARY/SECONDARY PipingFigure E-3b Dual Boiler -PRIMARY/SECONDARY Piping with CHXSection F Domestic HOT Water Piping Single Boiler Domestic HOT Water with ONE Storage TankFigure F-1c Automatic Chlorinators and Chemical Feeders Section G Pool HeatingWinterizingyour Heater Single Boiler Pool Application Spawater ChemistrySingle Boiler Pool Application with CHX Figure G-3a Double Boiler Pool ApplicationGAS Supply Connection Section H GAS Supply ConnectionsGAS Supply Pressure GAS Pressure Regulator Regulator Pressure SettingsVenting of Diaphragm GAS Components Check Power Source Section I Electrical Power ConnectionsCheck the Power Source Surge ProtectionField Wiring Connection Making the Electrical ConnectionsElectrical Connections Domestic HOT Water Section J Venting Connections GeneralPage Support of Vent Stack Venting Configurations Figure J-1 Natural Draft Vertical Vent Termination Page Section J-2 Heat Exchanger CategoryPage Section J-3 CategoryPage Section J-4 Vertical Direct Venting/Combustion Air CategoryVertical Direct Venting System Installation Figure J-5 Page Section J-6 Figure J-6Horizontal Thru-wall Venting System Category IV Installation Figure J-7 Page Figure J-8 Page Outdoor Installation withAdd-On Condensing Heat Exchanger Section K Condensate Drain Condensate Trap AlignmentSection L Controls Central Point Wiring CPWCPW Board Figure L-1 CPW Board Pump Turn-off Delay Manual High Limit Red Wiring Diagram Figure L-2Flow Switch High Limit Auto Reset High Limit Manual ResetManual Reset High Limit Flow Switch Auto Reset High LimitLOW Water CUT OFF Optional GAS Pressure SwitchPressure Control Device ACU-TRACK Section M General Safety Precautions TIME/TEMPERATURE Relationships in ScaldsSection N PRE-START-UP Figure O-1 Component and Pressure TAP LocationsTools Needed Section O ADB Initial START-UPPreparation for START-UP Do not Turn on GAS AT this Time START-UP Page Emissions Guidelines Section P Post START-UP CheckCO2 Operating Instructions Section Q OperationTo Turn OFF GAS to Appliance Section R Maintenance Suggested Minimum Maintenance ScheduleCleaning Boiler Heating Surfaces Section S Connecting Condensing Heat Exchanger CHX Vent Switch AdjustmentAppendix a InsidecombustionaircontaminationPage Page Page Page Page START-UP Settings Pressure SettingsLitho in U. S. a
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1000, 750, 500 specifications

Raypak is a renowned name in the heating industry, particularly known for its high-quality pool and spa heaters. Among their extensive product line, the Raypak 850, 500, 300, 400, and 700 models stand out for their reliability, efficiency, and cutting-edge technologies. Each model is designed to cater to different needs and applications while maintaining Raypak’s commitment to performance.

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