Weil-McLain UO-5 CV, UO-4 CV, UO-3 CV manual Typical Burner Wiring, Control System Features

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Burner Controls

Typical Burner Wiring & Burner Sequence of Operation for R7184P Control.

Refer to the appliance manufacturer’s wiring diagram for actual specifications.

Figure 10. – Typical Burner Wiring

1.STANDBY. The burner is idle, waiting for a call for heat. When a call for heat is initiated, there is a 3- 10 second delay while the control performs a safe start check.

2.VALVE-ON DELAY. The ignition and motor are turned on for a 15 second valve-on delay.

3.TRIAL FOR IGNITION (TFI). The fuel valve is opened. A flame should be established within the 15 second lockout time.

4.LOCKOUT. If flame is not sensed by the end of the TFI, the control shuts down on safety lockout and must be manually reset. If the control locks out three times in a row, the control enters restricted lockout.

5.IGNITION CARRYOVER. Once flame is estab- lished, the ignition remains on for 10 seconds to ensure flame stability before turning off. If the con- trol is wired for intermittent duty ignition, the ignition unit stays on the entire time the motor is running.

6.RUN. The burner runs until the call for heat is sati- fied. The burner is then sent to burner motor off delay, if applicable, or it is shut down and sent to standby.

Control System Features

7.RECYCLE. If the flame is lost while the burner is firing, the control shuts down the burner, enters a 60 second recycle delay, and then repeats the above ignition sequence. If flame is lost three times in a row, the control locks out to prevent cycling with repetitious flame loss due to poor combustion.

8.BURNER MOT OR-OFF DELAY. The fuel valve is closed and the burner motor is kept on for the selected motor-off delay time before the control re- turns the burner to standby.

61351

Feature

Interrupted

Limited reset,

Diagnostic LED,

Valve-on

Burner motor

Alarm Con-

 

ignition

Limited recycle

cad cell indicator

delay

off delay

tacts

R7184A

YES

YES

YES

—

—

—

R7184B

YES

YES

YES

YES

—

—

R7184P

YES

YES

YES

YES

YES

Optional

6104BAFG R0

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Contents R02 01/09 To the Professional, Qualif ed Installer or Service Agency Potential for Fire, Smoke and Asphyxiation HazardsTo the Homeowner or Equipment Owner Table of Contents Information To Be Used Only By Qualif ed Service TechniciansGeneral Information FeatureHazard Definitions Indicates a hazardous situGeneral Information To the Owner Burner Specif cationsWeekly General Specifications Air Tube Combination ATC codesInspect/Prepare Installation Site Inspect Chimney or Direct Vent System Tion HazardCombustion chamber Burner retrof t- ting Chamber DimensionsClearances to burner and appliance NozzleInspect/Prepare Installation Site Prepare the Burner Prepare the Burner Mount burner on applianceCheck/Adjust ‘Z’ Dimension ‘F’ heads Burner DimensionsCheck/Adjust ‘Z’ Dimension L1 & L2 Heads Installing the Oil Tank and Supply System Fuel Line Valves and FilterSpecial wiring required with covered burners Wire burnerBurner installed at jobsite Frozen Plumbing Water Damage HazardBurner Controls GeniSys Model 7505 Control WiringFeatures Fire or Explosion HazardBurner Controls Reset Button Operation Light Color On Continuously FlashingTypical Burner Wiring Control System FeaturesStart up burner/set combustion Cad Cell Resistance IndicatorResetting From Restricted or Hard Lockout Hot Gas Puff-Back Heavy Smoke HazardStartup/Checkout Check Safety FeaturesStartup / Checkout Set combustion with instrumentsPerform regular maintenance Shutting the Burner OffBlower wheel assembly Replace the blower wheelPage Description Warranty

UO-3 CV, UO-4 CV, UO-5 CV specifications

Weil-McLain is a well-respected name in the heating industry, recognized for its high-quality and efficient boiler systems. Among its notable offerings are the UO-3 CV, UO-4 CV, and UO-5 CV models, all of which showcase advanced engineering and innovative technology tailored for residential and commercial applications.

The UO-3 CV boiler is designed for mid-sized heating requirements, boasting a strong output capacity that balances efficiency with performance. It features a compact size, suitable for smaller installations, without sacrificing power. The boiler is equipped with a durable cast iron heat exchanger that provides excellent thermal efficiency and longevity, ensuring reliable operation over the years. Its easy access for maintenance also makes it a popular choice among HVAC professionals.

Moving to the UO-4 CV model, this boiler builds on the success of the UO-3 with an increased output capacity, making it ideal for larger residential or light commercial spaces. The UO-4 CV incorporates Weil-McLain’s advanced combustion technology, which optimizes fuel use and significantly reduces emissions. This model maintains a compact design while enhancing overall performance through improved heat transfer and reduced standby losses. The UO-4 CV's user-friendly features, including easy-to-use controls and a diagnostic system, streamline operational efficiency.

The UO-5 CV further solidifies Weil-McLain's commitment to excellence with its highest output among the three. This boiler is particularly suited for extensive heating demands, making it popular among larger commercial installations. The UO-5 CV also employs cutting-edge technology, including advanced controls for precise temperature regulation and an efficient system designed to minimize energy consumption. Its robust construction ensures it can handle heavy use while remaining reliable, even in challenging environments.

In summary, the Weil-McLain UO series, including the UO-3 CV, UO-4 CV, and UO-5 CV, represents a perfect blend of efficiency, innovation, and reliability. All models utilize durable materials, advanced engineering, and state-of-the-art technologies that define Weil-McLain's reputation for quality in hydronic heating solutions. Whether for residential or commercial applications, these boilers serve as dependable sources of heat, catering to various needs while maintaining energy efficiency and lower emissions.
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