To Next PageTo Next PageWhat to do if my Weil-McLain Boiler control module is not operating due to blown fuses?
If the control module in your Weil-McLain Boiler isn't working and you suspect blown fuses, ALWAYS check the control module fuses before you replace the control module or any other major components.
General| Brand | Weil-McLain |
|---|---|
| Model | Ultra 3 series |
| Category | Boiler |
| Language | English |
Safety precautions for servicing the boiler to avoid shock and burns.
Specifies required clearances from combustible materials for safety.
Details necessary clearances for boiler servicing and maintenance.
Requirements for boiler placement on floors and foundations.
Requirements for the special vent and air piping system.
Steps for converting the boiler for propane operation if required.
Procedure for pressure testing the boiler before permanent connections.
Steps for filling the boiler and holding it at test pressure.
Instructions for installing the relief valve and its discharge piping.
Guidelines for sizing and installing expansion tanks and make-up water.
Typical piping for circulator zoning with optional DHW.
Quick selection guide for Ultra boilers with PLUS indirect water heaters.
Procedures and warnings when replacing a boiler on a common vent.
Steps to verify the venting system for remaining appliances.
Requirements for piping combustion air from outside to the boiler.
Instructions for piping boiler flue gases to the outside.
Guidelines for locating the termination cap, considering safety and surroundings.
Instructions for connecting the condensate trap line to the boiler.
Guidelines for connecting and running condensate drain tubing.
Steps for connecting the gas supply piping to the boiler.
How to check gas pressure at the boiler inlet.
Summary of the U-Control's operating sequence and symbols.
Requirements for boiler water pH, hardness, and chlorine levels.
Steps for filling the system with water and testing for leaks.
How to verify water chemistry and antifreeze concentration.
Steps for purging air from the hydronic system.
Inspecting and filling the condensate trap and drain lines.
Procedure for checking for gas leaks before and during operation.
A checklist of final items to verify before boiler startup.
Procedure for checking flame and combustion using instruments.
Troubleshooting steps if the boiler fails to start properly.
Checks for water piping, vent/air piping, and system operation.
Procedures for setting and verifying boiler control operations.
Procedure for checking gas piping for leaks and correct installation.
Steps to verify propane conversion and orifice installation.
Detailed description of U-Control settings and diagnostics.
Step-by-step instructions for installing the propane orifice.
Specific start-up procedures for Ultra-399 propane conversion.
Procedure for adjusting the throttle screw for propane conversion.
Advanced piping for zone valve zoning with optional DHW.
Guidelines for locating terminations, considering safety and surroundings.
Guidelines for locating terminations with separate elbows.
Guidelines for locating vent/air terminations with separate pipes.
Detailed instructions for installing vent and air piping.
How to insert and secure vent or air pipes into boiler connectors.
Requirements for providing line voltage power to the boiler.
Instructions for wiring circulators to the U-Control.
Information on internal and external low water protection.
Requirements for the first-year inspection, including part replacement.
Inspecting the burner flame for stability and color at high/low fire.
Comparing blower RPM to specifications for proper operation.
Verifying the flame signal value on the U-Control display.
Verifying flue gas temperature relative to boiler return temperature.
Verifying all piping for leaks and correcting any found.
Starting the boiler and completing checks and tests.
Verifying the water system installation and pressure.
Information on U-Control fault displays and reset conditions.
How to access and interpret U-Control error logs.
Importance of checking fuses before replacing components.
Table of display conditions, diagnostics, and corrective actions.
How to check temperature sensors for resistance values.
Procedure for cleaning the heat exchanger pin side.
Procedure for cleaning the water side of the aluminum heat exchanger.
Safety warning to disconnect power before maintenance.
Verifying boiler operation after maintenance procedures.
Steps for accessing and cleaning the heat exchanger on specific models.
Steps for accessing and cleaning the heat exchanger on specific models.
Procedure for cleaning the water side of the heat exchanger for all models.
