Crown Boiler TWZ065, TWZ200, TWZ090, TWZ125, TWZ175, TWZ150 Wiring DIAGRAM, Single Heating Zone only

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HONEYWELL

L8148 OR L8124

AQUASTAT RELAY

INTERRUPTED

INTERMITTENT

BURNER MOTOR

LIMIT

VALVE

CAD

L2CELL

NOTE:

1) BURNER WIRING SHOWN IS FOR BECKETT

AFG BURNERS. CONSULT BURNER INSTRUCTION MANUAL FOR OTHER BURNERS

2) AQUASTAT PICTURED IS L8148. TERMINAL 3 AND JUMPER FROM L1 TO 3 ARE NOT PRESENT ON L8124. L8124 HAS TWO TERMINALS, MARKED ZC AND ZR, WHICH ARE NOT USED.

FIGURE 19: WIRING DIAGRAM, SINGLE HEATING ZONE ONLY

FIGURE 20: WIRING DIAGRAM, CIRCULATOR ZONE WIRING USING HONEYWELL R845A’s

(FACTORY BOILER WIRING NOT SHOWN - SEE FIGURE 19)

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Contents TWZ Series Table of Contents II SpecificationsProduct Description General Specifications III Before InstallingIV Locating the Boiler Frontview Side View For Buildings of Other than Unusually Tight Construction Air for Combustion and VentilationFor Buildings of Unusually Tight Construction Boiler Installed in Confined Space ALL AIR from InsideALL AIR from Outdoors Ventilated Crawl Space and Attic ALL AIR from OUTDOORS, Using 109 VI Venting1110 Minimum Recommended Breeching ChimneysizeStandardPiping VII System Piping1312 1413 Piping for Special SituationsIsolation of Boiler from System 1615 Viii Tankless Heater Piping1716 IX Fuel Line PipingONE-PIPE Lift System 1817TWO-PIPE Gravity Feed System 1918Single Zone Wiring WiringWiring Variations 2019Wiring DIAGRAM, Single Heating Zone only 2221 XI Start-up and Checkout2223 Boiler Model 24232524 XII Service and Maintenance2625 2726 Avoid Breathing Fiber Particulates and DustKEY # Description QTY. or Quantity PER Boiler or Crown P.N 2827Page Quantity PER Boiler or Crown P.N 30293130 PN980270 Rev609/10

TWZ150, TWZ125, TWZ065, TWZ075, TWZ100 specifications

Crown Boiler, known for its solid and reliable heating solutions, has designed the TWZ series to provide effective heating for both residential and commercial applications. The models in this series—TWZ090, TWZ120, TWZ175, TWZ200, and TWZ100—offer varying capacities and features tailored to meet diverse heating needs.

One of the key features of the TWZ series is its efficiency. These boilers are designed with a cast-iron heat exchanger that maximizes thermal efficiency, allowing for optimal heat transfer. This not only helps in reducing energy consumption but also ensures that the home remains warm and comfortable during the colder months. With an annual fuel utilization efficiency (AFUE) rating that can reach up to 85%, users can expect lower energy bills as well.

Each model in the TWZ series is equipped with a durable and robust construction. The cast iron sections provide increased resistance to wear and tear, making the TWZ series a long-lasting solution for heating needs. This is particularly beneficial for users looking for reliability over time, as the longevity of these boilers reduces the need for frequent replacements.

In terms of technology, the TWZ series features advanced controls that enhance functionality and ease of use. These boilers are compatible with various heating control systems, allowing users to fine-tune their heating setup according to their specific requirements. The inclusion of a flame safeguard system further ensures safety during operation, reducing the risk of malfunctions and improving overall reliability.

The TWZ series is designed for easy installation and maintenance. With options for direct venting or conventional chimney venting, homeowners and installers can choose the most suitable configuration for their properties. Additionally, the maintenance access points on these boilers make routine service checks simple and efficient, ensuring that the boilers remain in optimal condition.

Another important characteristic of the Crown Boiler TWZ series is its quiet operation. Advanced engineering minimizes noise production, making these boilers ideal for residential settings where peace and comfort are valuable.

In conclusion, the Crown Boiler TWZ090, TWZ120, TWZ175, TWZ200, and TWZ100 models offer a compelling combination of efficiency, durability, advanced technology, and user-friendly features. Whether for residential or light commercial use, they represent an excellent choice for anyone seeking reliable heating solutions.