Crown Boiler Troubleshooting for AWI and TWI Models: Comprehensive Guide

Page 32

START

AWI/TWI Troubleshooting Chart

Caution: Read page 29 before attempting to use this chart

Thermostat calls for heat

*Pow er off

*Blow n fuse or tripped breaker

*Misw ired or loose electrical connection in 120V line

Remove t'stat or zone valve end sw itch w ires from T&TV terminals on L8148E. Install temporary jumper across terminals T and TV.

Circulator start?

N

N120 volts at L1&L2?

Y

120 volts at

C1&C2?

N

Y24 volts across T&TV?

N

Y

Vent

Y

 

damper

 

 

open?

 

 

 

N

24 volts

 

 

 

 

 

 

 

 

across B and R

 

Y

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(limit sw itch) in

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L8148E ?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

120 volts

 

 

 

 

 

 

*Boiler off on

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y

 

 

 

N

 

 

N

limit

 

 

 

 

across

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

terminals at

 

 

 

 

 

 

*Defective

 

 

 

 

 

 

circulator?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

high limit.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24 volts

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

betw een pins

 

 

 

 

*Seized or

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1&4 (blue&yellow )and

 

 

 

 

defective

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2&4 (orange&yellow ) on

 

 

 

 

circulator

 

 

 

 

 

 

 

 

 

 

 

 

 

 

damper end of damper

 

 

 

 

 

 

 

 

 

 

 

 

 

N

 

 

 

 

 

 

 

 

 

 

 

 

harness? See

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note 7 on page 29.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Does

N

*Defective

circulator

 

 

 

L8148E-see

 

 

 

run now ?

 

 

 

 

 

 

Note 6 on page

 

 

 

 

 

 

 

 

 

 

29.

 

Y

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*Loose connection in t'stat or zone valve end sw itch w iring

*Defective t'stat or zone valve end sw itch

*T'stat or zone system misw ired-consult t'stat or zone valve manufacturer's instructions

*Bad electrical connection betw een C1 or C2 and circulator

Y

*Obstruction in path of damper blade

*Defective damper motor

*Loose connection betw een damper harness and damper

*Loose connection betw een damper harness and L8148E

*Defective damper harness.

*Defective L8148E

32

30

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Contents Crown Inside Front Cover Leave Blank Product Description Table of ContentsII Specifications Bleftpipedconfiguration Specifications III Before Installing IV Locating the BoilerAir for Combustion and Ventilation For Buildings of Other than Unusually Tight ConstructionExample For Buildings of Unusually Tight Construction ALL AIR from Outdoors Ventilated Crawl Space and AtticALL AIR from OUTDOORS, Using Openings Into Boiler Room VI VentingTypicalventsystem Installation and Components Removing an Existing Boiler from a Common Chimney 1210VII Gas Piping GAS Connection to BoilerViii System Piping StandardPipingPiping for Special Situations Standard Boiler PipingIndirect Water Heater Boiler Bypass Piping IX Wiring Single Zone WiringWiring DIAGRAM, Continuous Ignition Wiring Variations Circulator Zonewiring Using HONEYWELLR845AsAWI/TWI Control System Sequence of Operation Sequence of Operation, Standing PilotSequence of Operation, Intermittent Ignition Start-up and Checkout Page Standing Pilot Burner Flame For Your Safety Read Before Operating For Your Safety Read Before Lighting GAS Valve Detail Standing Pilot XI Service and Maintenance Heat Exchanger Cleaning Procedure XII Troubleshooting AWI/TWI Troubleshooting Chart END Standing Pilot Ignition System Troubleshooting Chart Intermittent Ignition System Troubleshooting Chart Xiii Parts Base-Block-Hood Below 2000 ft Burner Components KEY # Description QTY. or Quantity PER Boiler or Crown P.N Jacket/Components Crown

AWI262, AWI095, TWI095, AWI195, AWI037 specifications

Crown Boiler is a renowned name in the heating industry, providing high-quality, efficient heating solutions that cater to various residential and commercial needs. Among its impressive lineup, the AWI and TWI series stand out for their design, technology, and performance.

The Crown Boiler AWI061 and TWI061 are part of the Hydronic Boiler range, designed to deliver efficient hot water heating. The AWI series features an advanced pressure-jet design that allows it to operate with exceptional fuel efficiency, reducing operating costs for homeowners and businesses alike. Additionally, these models come equipped with an integrated pump system that ensures a consistent supply of hot water, making them ideal for both space heating and domestic hot water applications.

Meanwhile, the AWI162 and AWI128 models are engineered for higher output, addressing larger heating needs without compromising efficiency. These models showcase a robust heat exchanger made of durable cast iron, promoting longevity and effective heat transfer. The AWI series boilers feature a modern control system that allows for precise temperature management, enhancing comfort while minimizing energy consumption.

The Crown Boiler AWI295, on the other hand, steps up with a significant heating capacity suited for commercial applications. This model is designed with advanced safety and efficiency technologies, including an intelligent control module that monitors temperature and pressure, ensuring optimal performance while preventing malfunctions. The large water volume design allows for enhanced thermal stability and consistent heating output.

A notable characteristic across these models is their ease of installation and maintenance. Crown Boiler has engineered the units with user-friendly features, including accessible components and simplified diagnostics that help technicians service the boilers swiftly. Moreover, the durability of cast iron construction ensures that these units can withstand high thermal stress while delivering reliable performance over the years.

In summary, Crown Boiler’s AWI061, TWI061, AWI162, AWI128, and AWI295 models offer a range of solutions equipped with advanced technologies and features designed for efficiency and reliability. These boilers are suitable for diverse heating needs, promising optimal comfort and convenience in both residential and commercial settings. With Crown Boiler's longstanding commitment to quality, customers can be assured of a robust heating solution backed by exceptional service.