Weil-McLain UO-3 CV Wire burner, Frozen Plumbing Water Damage Hazard, Burner installed at jobsite

Page 14

!CAUTION Oil Supply Pressure Control Required

Damage to the filter or pump seals could cause oil leakage and a fire hazard.

yThe oil supply inlet pressure to the burner can- not exceed 3 psig.

yInsure that a pressure limiting device is installed in accordance with the latest edition of NFPA 31.

yDo NOT install valves in the return line.

(NFPA 31, Chapter 8.)

yGravity Feed Systems: Always install an anti- siphon valve in the oil supply line or a solenoid valve (RWB Part # 2182602U) in the pump/noz- zle discharge tubing to provide backup oil flow cut-off protection.

The burner may be equipped with a single-stage fuel unit for these installations. Connect the fuel supply to the burner with a single supply line if you want a one-pipe system (making sure the bypass plug is NOT installed in the fuel unit.) Manual bleed- ing of the fuel unit is required on initial start-up. If connecting a two-pipe fuel supply, install the fuel unit bypass plug.

Fuel supply below the level of the burner –

When the fuel supply is more than eight feet below the level of the burner, a two-pipe fuel supply sys- tem is required. Depending on the fuel line diam- eter and horizontal and vertical length, the instal- lation may also require a two-stage pump. Consult the fuel unit manufacturer’s literature, included with the burner, for lift and vacuum capability.

Fuel line installation –

yContinuous lengths of heavy wall copper tubing are recommended. Always use f are f ttings.

Never use compression f ttings.

yAlways install fittings in accessible locations. Proper routing of fuel lines is required to prevent air cavitation and vibration.

Frozen Plumbing and

Water Damage Hazard

If the residence is unattended in severely cold weather, burner primary control safety lockout, heating system component failures, power outages or other electrical system failures could result in frozen plumbing and water damage in a matter of hours. For protection, take preventive actions such as having a security system installed that operates during power outages, senses low temperature and initiates an effective action. Consult with your heating contractor or a home security agency.

Wire burner

Wire burner

Burner packaged with appliance

!WARNING Electrical Shock Hazard

Electrical shock can cause severe personal injury or death.

yDisconnect electrical power before installing or servicing the burner.

yProvide ground wiring to the burner, metal con- trol enclosures and accessories. (This may also be required to aid proper control system opera- tion.)

yPerform all wiring in compliance with the Na- tional Electrical Code ANSI/NFPA 70 (Canada CSA C22.1)

yRefer to appliance manufacturer’s wiring diagram for electrical connections.

Burner installed at jobsite

yRefer to Figures 11a and 11b, for typical burner wiring, showing cad cell primary controls. Burner wiring may vary, depending on primary control actually used.

yRefer to the appliance manufacturer’s wiring dia- gram prior to connecting the burner wiring. All wir- ing must be in accordance with the latest revision of National Electric Code NFPA 70 and all local codes and regulations. In Canada, all wiring is to be in accordance with the Canadian Electrical Code, Part 1.

The 7505 primary control with valve-on delay (pre- time) and burner motor-off delay (post-time) re- quires a constant 120 volts AC power source sup- plied to the BLACK wire on the control. The RED wire goes to the appliance limit circuit. Please note that other control manufacturers may use different wire colors for power and limit connections.

Special wiring required with covered burners

The mounting plate is not a conduit connec- tion point. Pass conduit and attached connector through the opening in the mounting plate and at- tach it directly to the burner-mounted 4x4 electrical box.

If attaching a burner cover to a previously installed burner, attach the mounting plate and then slide the conduit into the “J” shaped conduit slot.

 

6104BAFG R06

Page 13

Page 13 Page 15
Image 14
Page 13 Page 15
Contents R02 01/09 To the Homeowner or Equipment Owner To the Professional, Qualif ed Installer or Service AgencyPotential for Fire, Smoke and Asphyxiation Hazards Table of Contents Information To Be Used Only By Qualif ed Service TechniciansGeneral Information FeatureHazard Definitions Indicates a hazardous situWeekly General Information To the OwnerBurner Specif cations 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.
Top Page Image Contents