Weil-Mclain Ultra 399 Serie 4 Boiler Instruction Manual
Weil-Mclain Ultra 399 Serie 4 Boiler
Weil-Mclain Ultra 399 Serie 4 Boiler
Weil-Mclain Ultra 399 Serie 4 Boiler
Weil-Mclain Ultra 399 Serie 4 Boiler
Weil-Mclain Ultra 399 Serie 4 Instructions
Here we offer the Weil-Mclain Ultra 399 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 399 Serie 4 Boiler, we suggest checking the Frequently Asked Questions (FAQs) section of this manual.
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Weil-Mclain Ultra 399 Serie 4 Boiler Specifications
| Specification | Weil-Mclain Ultra 399 Serie 4 |
|---|---|
| Model | ULTRA 399 |
| Boiler Type | Gas-fired Water Boiler, Condensing |
| Series | 4 |
| Input (MBH) | 399 |
| Output (MBH) | 380 |
| AFUE Rating | 95% |
| Thermal Efficiency | 95% |
| Minimum Vent Size (PVC/CPVC/PP) | 4 inches |
| Supply/Return Connection | 1¼" NPT |
| Gas Connection | ¾" NPT |
| Electrical Requirements | 120 V / 60 Hz / 1 Phase |
| Maximum Operating Water Temperature | 180°F |
| Maximum Operating Pressure | 30 PSI |
| Height | 45.1 inches |
| Width | 22.8 inches |
| Depth | 23.3 inches |
| Shipping Weight | 210 lbs |
| Heat Exchanger Material | Cast Aluminum Block |
| Burner Type | Woven Steel Fiber Mesh |
| Ignition System | Direct Spark Ignition |
| Blower Type | Variable Speed Blower Assembly |
| Gas Valve | Negative Pressure Regulated |
| Boiler Circulator (Standard) | Taco 0013 (1¼" & 1½" Flanges) |
| Control Module | U-Control Module (3.5" LCD display) |
Weil-Mclain Ultra 399 Serie 4 Boiler Details
The Weil-Mclain Ultra 399 Serie 4 boiler is designed for ultra-efficient condensing operation, featuring advanced controls and robust construction. Its user-friendly information manual emphasizes critical safety precautions, outlining potential hazards with clear definitions like DANGER, WARNING, CAUTION, and NOTICE to ensure user and property protection.
A significant focus of the manual is preventing combustion air contamination. It explicitly lists numerous household, hobby, and industrial products containing fluorine or chlorine compounds, which can form strong acids within the boiler. Operating the boiler in areas like laundry rooms, swimming pools, or auto body shops without proper precautions is highly discouraged due to the risk of severe damage and flue gas spillage.
Proper boiler service and maintenance are paramount for reliability and safety. The manual stresses that installation and annual startup must be performed by a qualified service technician. Users are advised to disconnect electrical supply and allow the boiler to cool before any maintenance to prevent electric shock or severe burns.
The U-Control Module is a central feature, equipped with a 3.5" LCD display. This advanced control system offers three boiler priorities, multiple preset system configurations, and multi-boiler functionality. It manages ignition, high limit, and modulating temperature control, incorporating important low water protection and outdoor reset capabilities.
Daily checks include verifying the boiler area for combustible materials and air contaminants, ensuring air openings are clear, checking the pressure/temperature gauge (should not exceed 25 psig), and confirming the boiler front door is securely fastened. This door seal is crucial to prevent the boiler from drawing air from inside the room, especially when other appliances are present.
Monthly maintenance involves inspecting vent and air piping for blockages or leaks, and checking the relief valve for weeping. The condensate drain system also requires attention; users should verify it's unobstructed and fill the condensate trap if flue gas is escaping, indicating a dry trap. Automatic air vents, if installed, also need a quick check for proper operation.
Every six months, a more thorough inspection of boiler piping for gas and water leaks is required. The relief valve should also be operated to ensure it functions freely and does not weep afterward. For the end of the heating season, the manual provides instructions for shutting down the gas supply, but cautions against draining the system unless freezing temperatures are a risk, or if it contains antifreeze.
The boiler's construction features a cast aluminum block and a woven steel fiber mesh burner (for the 399 model), contributing to its efficiency and durability. Standard equipment includes direct spark ignition, a variable speed blower, a venturi mixing system with an air silencer, and various temperature sensors for precise control.
Beyond the core boiler, the complete jacket assembly provides practical benefits with a fully removable front, adjustable boiler legs, and an integrated condensate trap with a drain tee. An on/off power switch and a propane conversion orifice (for most models) are also part of the standard package, enhancing installation flexibility and user convenience.
Optional equipment extends the boiler's functionality and installation options. These include a wall mounting kit for space-saving installations, a low water cutoff (LWCO) with harness and test button for added safety, and a concentric vent kit for simplified venting. A condensate neutralizer kit helps manage acidic condensate, and an Ultra Easy-Up Manifold assists with plumbing connections.
For optimal system longevity, the manual advises against using petroleum-based cleaning or sealing compounds and "homemade cures" in the boiler system, which can damage gaskets and seals. It also warns against continual fresh makeup water, as mineral build-up and oxygen addition can significantly reduce boiler life and cause corrosion or heat exchanger failure.
Frequently Asked Questions (FAQs)
Can't find the answer you need? Here are some frequently asked questions about the Weil-Mclain Ultra 399 Serie 4 Boiler, and we answer them below.
