Weil-Mclain Ultra 105 Serie 1 Boiler Instruction Manual

Manual Weil-Mclain Ultra 105 Serie 1 Boiler Instruction Manual

Weil-Mclain Ultra 105 Serie 1 Boiler Instruction Manual

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Weil-Mclain Ultra 105 Serie 1 Boiler

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Weil-Mclain Ultra 105 Serie 1 Boiler

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Weil-Mclain Ultra 105 Serie 1 Instructions

Here we offer the Weil-Mclain Ultra 105 Serie 1 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 1 Boiler, we suggest checking the Frequently Asked Questions (FAQs) section of this manual.


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Weil-Mclain Ultra 105 Serie 1 Boiler Specifications

Specification Value
Boiler Type Gas-fired water boiler (condensing, direct vent, Category IV)
Fuel Type Natural Gas (Propane convertible with kit)
Net I=B=R Rating (BTUH) 90,000
DOE Heating Capacity (BTUH) 90,000
Input (BTUH) 105,000
AFUE (Annual Fuel Utilization Efficiency) 92.0%
Maximum Water Temperature 190°F (operating limit), 200°F (external limit possible)
Minimum Water Temperature 37°F (freeze protection activation)
Water Content Less than 2 gallons
Operating Weight 145 pounds
Height 33.5 inches
Width 17.5 inches
Depth 17.0 inches
Electrical Supply 120 VAC / 60 HZ
Boiler Circulator Taco 007 (shipped loose)
Vent Pipe Diameter Recommended 2" (or 3")

Weil-Mclain Ultra 105 Serie 1 Boiler Details

The Weil-McLain Ultra 105 Serie 1 Boiler is engineered with PhD Technology, or Precision Hydronic Data, an intelligent system designed to deliver precise hydronic heating and hot water. This technology optimizes efficiency by continuously measuring critical parameters within the heating system, ensuring optimal performance and energy savings for homeowners.

Its robust construction features a cast aluminum heat exchanger, renowned for its high efficiency and ability to operate effectively in condensing mode. This design allows for lower return water temperatures, maximizing heat transfer and contributing significantly to the boiler's impressive AFUE rating, making it an Energy Star-certified appliance.

Operation is remarkably quiet, thanks to an advanced blower design and an integrated air inlet silencer. This thoughtful engineering reduces noise, making the boiler suitable for installation in various residential environments without causing disruption.

The boiler's precise combustion is managed by a sophisticated gas valve and venturi system, which accurately mixes air and gas. This ensures a wide range of firing rates and consistent, clean combustion, adapting to varying heating demands with efficiency.

Comprehensive system monitoring is achieved through multiple sensors, including a flue gas sensor, outlet water temperature sensor, and return water temperature sensor. These components work in concert with the Control Module to adjust firing rates, protect the heat exchanger, and maintain set temperatures.

User interaction is facilitated by a clear electronic display and buttons on the control panel. This interface allows for easy setting of heating temperatures, displays current operating conditions, and provides status or lockout codes for efficient troubleshooting by qualified technicians.

Beyond heating, the Ultra 105 Serie 1 supports Domestic Hot Water (DHW) heating through an indirect storage water heater. The control module offers automatic priority heat allocation to the DHW, ensuring rapid recovery and ample hot water supply when demand arises.

For enhanced comfort and energy management, the boiler features Outdoor Reset Operation when the optional outdoor sensor is installed. This intelligent function automatically adjusts the target outlet water temperature based on the outdoor ambient temperature, preventing overheating and reducing fuel consumption during milder weather.

Safety is paramount, with built-in Low Water Protection and advanced Thermal Overrun Protection. These features safeguard the boiler by detecting insufficient flow or excessively high temperatures, initiating shutdowns to prevent damage and ensure reliable long-term operation.

The boiler's design also emphasizes installation flexibility, capable of both floor-mounted and wall-mounted installations using a separately available kit. This adaptability allows for easier integration into diverse residential layouts and space constraints.

Frequently Asked Questions (FAQs)

Can't find the answer you need? Here are some frequently asked questions about the Weil-Mclain Ultra 105 Serie 1 Boiler, and we answer them below.


What is PhD Technology?
PhD Technology, or Precision Hydronic Data, is an intelligent system that precisely manages hydronic heating and hot water needs, maximizing efficiency by measuring system data parameters.

What type of heat exchanger does the Ultra 105 Serie 1 use?
It utilizes a high-efficiency cast aluminum heat exchanger, designed for condensing operation, which contributes to its superior efficiency.

Can this boiler be converted to propane gas?
Yes, the Weil-McLain Ultra 105 Serie 1 Boiler is shipped for natural gas operation but can be converted to propane by installing a specific propane orifice kit.

What are the recommended water chemistry parameters for the boiler?
The system water pH should be maintained between 7.0 and 8.5, hardness less than 7 grains, and chlorine concentration less than 200 ppm. Proper water treatment may be necessary.

Does the boiler have outdoor reset capability?
Yes, an outdoor temperature sensor is shipped with the boiler. When installed, the control module automatically adjusts the target outlet water temperature based on outdoor conditions for optimal efficiency.

How often should the Weil-McLain Ultra 105 Serie 1 Boiler be serviced?
The boiler should be inspected and started annually, at the beginning of the heating season, by a qualified service technician to ensure maximum efficiency and reliability.

What should I do if I smell gas near the boiler?
Do not attempt to light any appliance, do not touch any electrical switch, and immediately call your gas supplier from a neighbor's phone. If you cannot reach them, call the fire department.

Can I use automotive antifreeze in the boiler system?
No, NEVER use automotive or standard glycol antifreeze. Only use freeze-protection fluids specifically recommended in the Ultra Boiler Freeze Protection Supplement.

What kind of display does the boiler have for operation and troubleshooting?
The boiler features a 4-digit electronic display that shows operating conditions, boiler status, and shutdown or lockout codes for easy troubleshooting.

Is the Ultra 105 Serie 1 suitable for radiant heating applications?
Yes, its unique heat exchanger design allows it to work effectively in condensing mode, making it ideal for radiant heating systems without needing to regulate boiler return water temperature.

What happens if the boiler's outlet water temperature exceeds the target?
If the outlet water temperature exceeds the target (or 190°F), the burner will shut off. The boiler also has additional thermal overrun protections at 203°F (soft lockout) and 210°F (hard lockout).

Does the boiler provide domestic hot water priority?
Yes, when an indirect water heater aquastat calls for heat, the control module prioritizes DHW, shutting down space heating and activating the DHW circulator at a 190°F target temperature.

Is the boiler designed for quiet operation?
Yes, the Ultra 105 Serie 1 features an advanced blower design and an air inlet silencer to ensure very quiet operation.

What is the significance of the boiler being a 'Category IV' appliance?
Category IV means it is a condensing boiler with a pressurized vent system, likely to produce condensate in the vent. It requires special venting materials and methods as outlined in the Ultra Boiler Vent Supplement.

What is the operating weight of the Ultra 105 Serie 1 boiler?
The operating weight of the Ultra 105 Serie 1 boiler is 145 pounds.

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