Weil-Mclain Ultra 155 Serie 3 Boiler Instruction Manual
Weil-Mclain Ultra 155 Serie 3 Boiler
Weil-Mclain Ultra 155 Serie 3 Boiler
Weil-Mclain Ultra 155 Serie 3 Boiler
Weil-Mclain Ultra 155 Serie 3 Boiler
Weil-Mclain Ultra 155 Serie 3 Instructions
Here we offer the Weil-Mclain Ultra 155 Serie 3 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 155 Serie 3 Boiler, we suggest checking the Frequently Asked Questions (FAQs) section of this manual.
Product Images
Weil-Mclain Ultra 155 Serie 3 Boiler Specifications
| Specification | Value |
|---|---|
| DOE Heating Capacity | 139,000 Btuh |
| CSA Input | 155,000 Btuh |
| CSA Output | 139,000 Btuh |
| Net I=B=R Capacity | 123,000 Btuh |
| Boiler Water Content | 1.17 Gallons |
| AFUE | 95% |
| Vent/Air Pipe Size | 3” |
| Shipping Weight | 234 Pounds |
| Operating Weight | 181 Pounds |
| Water Flow Rate @ 20°F Rise | 13.9 GPM |
| Water Flow Rate @ 40°F Rise | 7.0 GPM |
| Electrical Service Required | 15.0 Amps |
Weil-Mclain Ultra 155 Serie 3 Boiler Details
The Weil-McLain Ultra 155 Series 3 Boiler boasts a cast aluminum heat exchanger, specifically engineered for high-efficiency condensing operation. This design allows the boiler to operate effectively with lower return water temperatures, maximizing heat transfer and overall energy savings. Such advanced heat exchanger materials necessitate careful attention to system water chemistry, requiring pH levels between 7.0 and 8.5 and minimal hardness.
Featuring an advanced blower design and an integrated air inlet silencer, the Ultra 155 Series 3 ensures remarkably quiet operation. The blower efficiently pulls combustion air through a venturi, where it precisely mixes with gas before entering the burner. This precise air-gas mixture is critical for stable and efficient combustion across the boiler's modulating firing range.
An automatic gas valve senses the vacuum created by the airflow through the venturi, ensuring that gas only flows when sufficient air is present. This is a fundamental safety mechanism. The gas valve is factory-set for optimal outlet pressure, eliminating the need for field adjustments (except for the Ultra-399 propane conversion, which involves a throttle screw adjustment).
At the heart of its intelligence is the U-Control Module, a fully programmable system that orchestrates boiler operation. It utilizes sophisticated PID (Proportional-Integral-Derivative) response to anticipate and react to heating demands, ensuring stable and efficient temperature control. The module features a robust graphic and text display, simplifying setup, monitoring, and troubleshooting for technicians.
The U-Control offers extensive flexibility, including the ability to manage up to three distinct heating systems or zones. It can control three circulators, with programmable priority assignments for each heat input, such as domestic hot water (DHW) or space heating circuits. This allows for tailored heating solutions that optimize comfort and energy usage.
An integral outdoor reset option is available, which automatically adjusts boiler target temperatures based on external conditions, further enhancing efficiency. For larger installations, the U-Control supports multiple boiler sequencing or modulation, facilitating complex heating plants through a 0-10 VDC signal generator and input capabilities. This ensures optimal performance across multi-boiler setups.
Safety is paramount, with the U-Control incorporating dual temperature sensors for both boiler outlet and flue gas temperatures, providing redundant high-limit protection. It also features integral low water protection, continuously monitoring the heat exchanger temperature to prevent damage. This advanced monitoring system often satisfies local code requirements for low water cut-off devices.
From a maintenance perspective, the boiler is designed with a swing-away control panel assembly, allowing technicians easy access to electrical connections. A quartz glass flame inspection window provides a visual check of burner operation. The unit also includes a flue gas dual sensor that monitors exit temperatures, safeguarding the flue pipe and heat exchanger from overheating.
The Weil-McLain Ultra 155 Series 3 operates as a Category IV direct vent boiler, meaning it utilizes a sealed combustion system and is designed for flue gases to condense within the vent. It requires a dedicated vent system, separate from any other appliances, and offers various termination options, including sidewall or vertical setups, with concentric or separate pipes using approved materials like PVC or AL29-4C stainless steel.
Strict adherence to installation and maintenance guidelines is crucial. The manual includes comprehensive safety warnings, defining DANGER, WARNING, CAUTION, and NOTICE levels. It outlines requirements for annual servicing, including a special first-year inspection, water chemistry checks, and proper handling of ceramic fiber materials found within the boiler, all essential for ensuring reliable and safe operation.
Frequently Asked Questions (FAQs)
Can't find the answer you need? Here are some frequently asked questions about the Weil-Mclain Ultra 155 Serie 3 Boiler, and we answer them below.
