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Details the PVWB model with continuous pilot ignition for gas-fired hot water boilers.
Describes the PWB model featuring electronic intermittent ignition for gas-fired hot water boilers.
Lists input, heating capacity, and net I=B=R ratings for models based on section count.
Explains input rating reductions for altitudes above 2,000 ft and general guidance for high altitude use.
Covers essential pre-installation checks for gas type, air, electrical, venting, and thermostat placement.
Guidelines for selecting a boiler location, required clearances, and ventilation needs.
Specifies minimum distances from the boiler to combustible materials for safe operation.
Details methods for providing combustion air: indoor air (standard/infiltration) and outdoor air (two/one opening).
Provides a table and formula for calculating minimum room volume for indoor air based on input MBH and ACH.
Instructions for installing the safety relief valve and its discharge piping to a drain.
Steps for correctly installing the temperature pressure gauge onto the boiler's supply water tee.
Recommends mixing valves for systems below 140°F to prevent low temperature return water.
Guidelines for integrating the boiler with refrigeration systems and air handling units.
Emphasizes checking chimney condition, size, and construction for proper venting of combustion gases.
Details vent damper installation, including placement, fastening, and adapter use for 2-section boilers.
Specifies the required minimum clearance between single-wall metal vent pipe and combustible materials.
Outlines steps for safely removing a boiler from a common venting system and verifying remaining appliances.
Explains how to check vent damper operation and provides instructions for manual control.
Details sizing gas pipes by length and BTU input, and rules for connecting gas piping to the boiler.
Essential safety warnings and procedures for checking gas piping, including leak detection and pressure testing.
Outlines requirements for the 120-volt power supply circuit, including amperage, shut-off, and grounding.
Guides on thermostat location selection and wiring to aquastat terminals, plus vent damper/circulator wiring.
Details wiring for intermittent ignition systems: thermostat, aquastat, pilot control, gas valve, and vent damper.
Details wiring for standing pilot systems: thermostat, aquastat, pilot, gas valve, and vent damper.
Explains the functions of safety relief valve, expansion tank, air purger, automatic fill valve, drain valve, and temperature control.
Describes the function of the circulating pump for system circulation and the vent damper for efficiency.
Explains the function of the rollout switch (flame rollout) and spill switch (blocked vent).
Details how a hot-water system operates and the procedure for filling it with water.
Provides critical warnings about fire/explosion, smelling gas, and handling submerged appliances.
Step-by-step instructions for operating an intermittent ignition boiler, including starting and shutting down.
Step-by-step guide for operating a continuous pilot boiler, including lighting and shutdown procedures.
Explains automatic gas valve, safety pilot function, and gas valve safety shutdown test procedures.
Instructions for adjusting pilot burner flame and checking main burner flame appearance for proper operation.
Guides on adjusting limit controls and recommended boiler water temperatures for different heating units.
Details annual checks for burners, flue passages, vent pipe, and instructions for cleaning the boiler and burners.
Covers testing the safety relief valve, managing expansion tank issues, draining the system, and servicing circulator pump valves.
Provides potential causes and solutions for common heating issues like thermostat problems, power loss, or poor radiator heat.
Offers troubleshooting advice for noisy burners, relief valve leaks, and water-logged expansion tanks.
Lists part numbers for jacket, section, and base components for various boiler sizes, 2 to 9 sections.
Lists part numbers for burner and manifold components, including gas valves, orifices, and pilot burners.
Lists part numbers for boiler controls (aquastats, pilot controls) and various piping fittings and valves.
The provided manual describes the Dunkirk PWB Series Gas-Fired Hot Water Boilers, available in both Continuous Pilot (PVWB) and Electronic Intermittent Ignition (PWB) models. These boilers are designed for heating hot water in residential and commercial applications.
The Dunkirk PWB Series boilers are gas-fired appliances that heat water for hydronic heating systems. They are equipped with either a continuous pilot or an electronic intermittent ignition system to ignite the main burners. The heated water is then circulated through a piping system to radiation units (e.g., radiators, baseboards, convector radiators) to provide space heating. The system includes safety features such as a safety relief valve, rollout switch, and spill switch to ensure safe operation. A vent damper is integrated to improve efficiency by reducing standby losses when the burner is off.
The boilers are available in 2 to 9 sections, with varying input MBH, heating capacity MBH, and Net I=B=R Rating MBH.
Input MBH (1,000 Btuh):
Heating Capacity MBH (D.O.E. test procedure):
Net I=B=R Rating MBH (based on 1.15 piping and pickup allowance):
Dimensions (Inches):
Boiler Volume (Cu. Ft.):
Electrical Supply: Separate 120 volt circuit, 15 ampere, 14 gauge or heavier copper wire. Thermostat: 24 volt, heat anticipator set at .2 amps. Gas Pipe Sizes: Refer to tables for Natural Gas and Propane Gas pipe capacity based on length and BTU per hour input. Altitude Deration: For altitudes above 2,000 ft., input ratings are reduced by 4% for each 1,000 ft.
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