Service and Maintenance of Aerco Benchmark Boilers
29 July 2016
Reference #: SO-GA 2016-01
This safety order is issued pursuant to section 31 of the Safety Standards Act. A person affected by this safety order may appeal this order in writing to the Safety Standards Appeal Board within 30 days. The appeal process is set out on the Safety Standards Appeal Board website.
Failure to comply with a safety order is an offence under section 72 of the Safety Standards Act.
Part 1: Details of Regulated Work or Regulated Product
This safety order is being issued in relation to (circle or highlight one):
|Regulated Work – General||Regulated Products – General|
|Regulated Work – Specific Class||Regulated Product – Specific Class|
|Specific Regulated Work||Specific Regulated Product|
Part 2: Requirement(s) of this safety order
The following Gas Boilers manufactured by AERCO International Inc. are affected:
AERCO Benchmark (BMK) Gas Fired Hot Water Boilers series models 1.5LN, 2.0LN, 3.0LN discontinued in 2012-2013
Owners of commercial or industrial buildings that contain these identified boilers must ensure:
- The boiler(s) must be updated by an individual with the appropriate gas Certificate of Qualification operating under a licensed gas contractor to increase the blower purge setting to ensure boiler (combustion chamber) and flue passages (connected venting) are completely purged 4 times prior to an ignition trial. Actions as detailed in the Aerco Technical Service Bulletin TSB-2016-04 must be followed.
- The boiler(s) is inspected at least annually by an individual with the appropriate gas Certificate of Qualification operating under a licensed gas contractor to verify:
- the correct installation and functioning of the current ignitor assembly provided by the manufacturer as set out below; and
- that the boiler is generally in safe operating condition.
- Any servicing or repairs required for the continued safe operation of the boiler(s) as identified by the inspecting gasfitter must be carried out in time to ensure that no potentially hazardous conditions are created or allowed to persist.
- Accurate records of any servicing or repairs shall be maintained on site and supplied to a Provincial Safety Manager or area Safety Officer upon request.
Note: This Safety Order applies only to Legacy models that were discontinued in 2012 -2013 not current models of Aerco Benchmark Boilers
Part 3: Details of Issue (if applicable)
This safety order is being issued based on the following:
BC Safety Authority has been informed of seven ignition related incidents since 2011 involving Legacy AERCO Benchmark 1.5, 2.0 or 3.0 boilers in BC. These incidents were classified as “hard light-offs” or “delayed ignitions” and were described as a loud bang or pop during operation or start-up. All reported incidents resulted in damage to the connected venting system. BC Safety Authority has not received any reports of injuries.
In one recent incident the boiler had continued to function normally, while the venting system had become damaged and disconnected allowing products of combustion to vent into the building. Although the manufacturer noted that the installation -did not conformed to their recommended practices, this potential condition presents - safety hazard.
AERCO boilers require the blower to spin-down from its pre-purge speed to ignition speed for smooth light-off with the proper air/fuel ratio delivered to the premix burner. When an ignition trial occurs with high excess air due to excess blower speed, the boiler may fault on Flame Loss During Ignition (FLDI or may possibly result in a loud light-off with or without FLDI fault.
The mandatory requirements detailed in part 2 of this safety order are the corrective actions identified in the related incident investigations that will greatly reduce the likelihood of similar events. Incidents involving this type of product are required to be reported in accordance with the Safety Standards Act. If you discover any damage to your boiler or its venting system, or if you have experienced ignition system events with your product in the past, please email BC Safety Authority at firstname.lastname@example.org
All Benchmark Boiler models, with the exception of model BMK 6000, use igniter-injector (Kit P/N 58023). Inspect and validate as per the maintenance schedule, replacement is required at least every 24 months of operation. Replacement may be required sooner if there is evidence of substantial erosion or carbon build-up.
Make sure to use igniter-injectors with black potting material around the ceramic insulator. Do not install an older igniter-injector with white potting material.
Part 4: Details of Ordering Safety Manager or Safety Officer – Please read following page
I certify that I am authorized to issue this safety order in accordance with section 15 (d) of the Safety Standards Act or that I have been delegated this power under section 15 (g) of the Safety Standards Act.
Provincial Safety Manager – Gas Technical Programs
Date: July 29, 2016
For more information about the British Columbia Safety Authority, please visit our website at: www.safetyauthority.ca