Weil-Mclain Ultra 105 Serie 4 Boiler Instruction Manual

Manual Weil-Mclain Ultra 105 Serie 4 Boiler Instruction Manual

Weil-Mclain Ultra 105 Serie 4 Boiler Instruction Manual

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Weil-Mclain Ultra 105 Serie 4 Boiler

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Weil-Mclain Ultra 105 Serie 4 Boiler

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Weil-Mclain Ultra 105 Serie 4 Boiler

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Weil-Mclain Ultra 105 Serie 4 Boiler

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Weil-Mclain Ultra 105 Serie 4 Instructions

Here we offer the Weil-Mclain Ultra 105 Serie 4 Boiler manual completely free and in English. We have cataloged this manual in the Boilers section on Manualverse, and it has been rated by 1 users with an average rating of 5. If you have any specific questions about Weil-Mclain Ultra 105 Serie 4 Boiler, we suggest checking the Frequently Asked Questions (FAQs) section of this manual.


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Weil-Mclain Ultra 105 Serie 4 Boiler Specifications

Specification Value
Model ULTRA 105
Gas Input (MBH) 105
Net I=B=R (MBH) 91
AFUE 95.0%
Electrical (Volts/Hz/Amps) 120/60/12
Heating Area (Sq. Ft.) 1200
Heating Area (Sq. Ft. with 2 GPM flow)* 1500
Vent Size (Sch. 40 PVC) 2"
Vent Length Max. (ft.) 100
Gas Connection (NPT) 1/2"
Water Connection (NPT) 1"
Boiler Weight (lbs) 104
Shipping Weight (lbs) 114
Width (inches) 16
Depth (inches) 16
Height (inches) 30

Weil-Mclain Ultra 105 Serie 4 Boiler Details

The Weil-McLain Ultra 105 Series 4 Boiler features a robust cast aluminum block heat exchanger, renowned for its efficiency and durability. At its heart is a stainless steel burner ensuring clean and efficient combustion. Paired with direct spark ignition and a variable speed blower assembly, the boiler achieves precise modulation and reliable startups. The innovative venturi mixing system incorporates an air silencer, contributing to quieter operation while optimizing the air-gas mixture for superior performance. A negative pressure regulated gas valve further enhances safety and maintains consistent gas flow.

A standout feature is the advanced U-Control Module, equipped with a vibrant 3.5-inch LCD display for intuitive interaction. This sophisticated system offers three boiler priorities and multiple preset system configurations to adapt to diverse heating needs. It provides comprehensive control, including ignition control, high limit and modulating temperature control, and low water protection. The U-Control also supports multiple boiler functionality and robust alarm control functionality, ensuring safe and efficient operation.

Beyond basic heating, the U-Control module intelligently integrates outdoor reset capabilities, optimizing boiler output based on external temperatures for maximum efficiency. It can manage any combination of three circulators, offering flexibility for complex hydronic systems. The boiler is extensively monitored with various sensors, including outlet and inlet water temperature sensors, a flue gas temperature sensor, and system water temperature sensors, all providing critical data for the U-Control to maintain peak performance and safety.

Designed with user convenience and longevity in mind, the Ultra 105 Series 4 comes with a complete jacket assembly featuring a fully removable front for easy service access. Adjustable boiler legs facilitate stable installation. Crucially, the unit includes a condensate trap with drain tee assembly, vital for proper operation of a condensing boiler. For regions with alternative fuel needs, a propane conversion orifice is included, highlighting its versatility. Regular maintenance, including annual startup by a qualified technician, is emphasized to ensure continued reliability.

Safety is paramount, with the manual extensively detailing hazard definitions and precautions. It mandates the installation of a carbon monoxide detector in the living space. Strict guidelines on preventing combustion air contamination are provided, listing specific chemicals and environments to avoid that could damage the boiler. Users are cautioned against using petroleum-based cleaning compounds or "homemade cures" in the boiler water, and the importance of professional installation and annual service by a qualified technician is repeatedly stressed to prevent personal injury, property damage, or loss of life.

Frequently Asked Questions (FAQs)

Can't find the answer you need? Here are some frequently asked questions about the Weil-Mclain Ultra 105 Serie 4 Boiler, and we answer them below.


Who should perform the installation and service for the Weil-Mclain Ultra 105 Serie 4 Boiler?
Installation and service must be performed by a qualified installer, service technician, or the gas supplier. Refer only to the User's Information Manual for your reference.

What should I do if I smell gas near the boiler?
Do not try to light any appliance, do not touch any electrical switch, and do not use any telephone in your building. Immediately call your gas supplier from a phone outside the structure. If you cannot reach them, call the fire department.

How often should the boiler be maintained?
The boiler must be inspected and started annually, at the beginning of the heating season, by a qualified service technician. Additionally, daily, monthly, periodically, and every 6 months maintenance procedures as outlined in the manual must be performed by the homeowner.

Are carbon monoxide detectors required with this boiler?
Yes, it is explicitly stated that the installer is required to confirm that at least one carbon monoxide alarm is installed in the living space before the appliance is put into operation.

What kind of substances should I avoid near the boiler's air inlet?
You must avoid products containing fluorine or chlorine compounds, such as spray cans with chloro/fluorocarbons, chlorinated waxes/cleaners, swimming pool chemicals, calcium chloride, sodium chloride, refrigerants, paint/varnish removers, hydrochloric acid, cements, glues, and antistatic fabric softeners. These can cause corrosive acids.

What should I do if the boiler's combustion air inlet is in an area with contaminants?
If contaminating chemicals are present or cannot be removed, you must have the boiler combustion air and vent re-piped and terminated to another location by a qualified installer.

Can I use automotive antifreeze in the boiler system?
No, absolutely not. NEVER use automotive or standard glycol antifreeze. Only use freeze-protection fluids specifically made for hydronic systems and follow all guidelines given by the antifreeze manufacturer.

What is the maximum pressure reading the pressure/temperature gauge should show?
The pressure reading on the pressure/temperature gauge should not exceed 25 psig. If it does, contact a qualified service technician.

How do I know if the condensate drain system is working properly?
While the boiler is running, check the discharge end of the condensate drain tubing and the open top of the condensate tee. Ensure no flue gas is escaping. You can also slowly pour water into the top of the PVC tee; it should run out the end of the drain line.

What should I do if the relief valve weeps or leaks?
Inspect the boiler relief valve and discharge pipe for weeping or leakage. If it frequently weeps, the expansion tank might be faulty. Contact a qualified service technician immediately. If water doesn't flow when the lever is lifted, the valve or discharge line might be blocked, requiring immediate boiler shutdown and technician inspection.

Is it safe to turn off the electrical supply if the boiler overheats or the gas supply fails to shut off?
No, do not turn off or disconnect the electrical supply to the boiler. Instead, shut off the gas supply at a location external to the appliance.

What is the purpose of the U-Control display?
The U-Control display is a 3.5" LCD that provides intuitive interaction and control over various boiler functions, including system configurations, alarm control, ignition, temperature modulation, low water protection, outdoor reset, and management of up to three circulators. It also displays important operational information and allows for setting the date and time.

Can the Weil-Mclain Ultra 105 Serie 4 Boiler be converted to use propane?
Yes, the complete jacket assembly includes a propane conversion orifice (for all models except the 80), indicating it can be adapted for propane use.

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