To Next PageTo Next PageWhat does error code U.125 mean on Crown Boiler?
If the display reads “U.125” continuously and the fan is running on your Crown Boiler, it indicates a defective AT250 transformer. Check the “F3” fuse in the MCBA (see Figure 13.2 for location) and replace it with the provided 4A slow-blow fuse if it's blown.
What causes a blank display panel but running fan on Crown Boiler?
If the display panel on your Crown Boiler is blank but the fan is running, it could be due to a loose 120VAC connection in the wiring between the boiler J-Box and the MCBA. Also, check the “F1” fuse in the MCBA (see Figure 13.2 for location) and replace it with the provided 5A fuse if it's blown.
What causes an open pressure switch circuit in Crown Boiler?
An open pressure switch circuit in a Crown Boiler can be caused by several factors: a blockage in the intake or vent system, a blocked or leaking pressure switch tubing, a heat exchanger or burner blockage, terminals exposed to high winds, or a blockage in the condensate trap above the vent.
What does power failure after lockout mean for Crown Boiler?
If a power failure occurs after a lockout on your Crown Boiler, it suggests that another error occurred before the power was interrupted. To address this, reset the control and observe if the hard lockout reoccurs.
Why Crown Boiler fires but display is blank?
If your Crown Boiler fires but the display panel remains blank, this could be due to a loose ribbon cable or a defective display.
Why is the return sensor temperature higher than the supply on Crown Boiler?
If the MCBA (Main Control Board Assembly) in your Crown Boiler is reading a return sensor temperature higher than the supply sensor temperature, it could be due to reversed flow through the boiler, lack of boiler water flow, reversed sensor wiring, or a defective supply or return sensor. Verify the correct piping and pump orientation and ensure the system is purged of air with appropriate valves open to resolve the issue.
What causes an open return water temperature sensor circuit on Crown Boiler?
If the return water temperature sensor circuit is open on your Crown Boiler, it could be due to loose or miswired return sensor wiring or a defective return sensor.
What causes an open flue gas temperature sensor circuit on Crown Boiler?
If the flue gas temperature sensor circuit is open on your Crown Boiler, it could be due to loose or miswired flue temp sensor wiring or a defective flue temp sensor.
Why blower is not running or fan speed signal not detected on Crown Boiler?
If the blower is not running when it should, or the fan speed signal is not being detected by the MCBA in your Crown Boiler, it could be due to a loose connection in the 120 VAC fan wiring, a loose or miswired fan speed harness, or a defective fan.
Why Crown Boiler fan is not achieving set point speed?
If the fan on your Crown Boiler is not achieving the set point speed, it may be due to a loose or incorrect fan speed control connection or a defective fan.
Instructions and procedures for securely mounting the boiler to a wall.
Guidance on using an optional pedestal kit for floor installation.
Details on approved vent system types, lengths, and components.
Step-by-step guide for assembling concentric vent systems.
Instructions for installing approved stainless steel venting systems.
Procedures for installing and maintaining the condensate trap and drain.
Important safety and material considerations for system piping.
Methods and requirements for designing the hydronic system for proper flow.
Essential requirements for installing boiler piping, including relief valve.
Guidance for piping in systems with oxygen, chillers, or air handlers.
Wiring instructions for thermostats, sensors, and auxiliary limits.
Overview of the Sola control, boiler functions, and pump management.
Steps for setting up the boiler control for the specific system.
How to adjust temperature setpoints and manual fire modes.
Procedure to input service contact details into the control.
Comprehensive guide to understanding boiler status displays and indicators.
How to navigate the diagnostics menu to identify and resolve faults.
Flowchart and steps to diagnose and fix a blank or unreadable display.
Alternative piping method for integrating BWC boilers into existing zone systems.
Requirements for CO detector installation in Massachusetts for side-wall vented units.
Specifications for approved carbon monoxide detectors.
Requirements for signage near horizontal exhaust vent terminals.
Inspector's role in verifying CO detectors and signage compliance.
Manufacturer's responsibilities for providing venting system instructions and parts.
General| Model | BWC070 |
|---|---|
| Type | Water Boiler |
| Input (BTU/hr) | 70, 000 |
| Output (BTU/hr) | 56, 000 |
| Vent Diameter (inches) | 4 |
| Weight (lbs) | 150 |
| Fuel Type | Natural Gas |
