Chaska, MN, United States
Chaska, MN, United States

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Ellis R.T.,Questions and Solutions Engineering Inc.
Engineered Systems | Year: 2010

The Building Commissioning Association (BCxA) has developed a list of eleven 'Essential Attributes of Building Commissioning'. This first attribute acknowledges that commissioning is a 'process' and it needs a leader. Commissioning is a team effort that involves not only the CA but also many others associated with the design, construction, and future operation of the commissioned systems. The CA is 'in charge' of this team but is not responsible for doing everything included in the commissioning process. This attribute also implies that the CA does not accept the commissioned systems but makes the final recommendations to the owner. The second attribute confirms that if the CA is responsible for designing the systems, installing the equipment, programming the controls, scheduling the project, and/or keeping the project on budget, there is a strong possibility that at some point in the project the demands of the other job will influence decisions or recommendations made during commissioning.


Ellis R.T.,Questions and Solutions Engineering Inc.
Engineered Systems | Year: 2010

Some of the essential attributes of building commissioning defined by the building commissioning association (BCxA) are discussed. The attribute says that the commissioning authority (CA) provides constructive input for the resolution of system deficiencies. In case of a disagreement between the design and construction teams regarding what is or is not a deficiency, the CA's unbiased third-party status can help the building owner understand and process both sides of the argument. The other attribute says that every commissioning project is documented with a commissioning report that includes an evaluation of the operating conditions of the systems at the time of functional test completion. It also includes deficiencies that were discovered and the measures taken to correct them and uncorrected operational deficiencies that were accepted by the owner.


Ellis R.T.,Questions and Solutions Engineering Inc.
Engineered Systems | Year: 2010

Some Building Commissioning Association's (BCxA) essential attributes of building commissioning are addressed. The Commissioning Authority (CA) recommends the commissioning roles and scope of all members of the design and construction terms. The roles and scope are defined in each design consultant's contract, the construction manager's contract, general conditions of the specification, and the specifications for each system and component for which the suppliers' support is required. If commissioning is introduced after the general contractor and subcontractors have been awarded the project, the owner faces a challenge of negotiating the value of services considered by the bidders. Each project is commissioned in accordance with a written commissioning plan that is updated as the project progresses. The commissioning plan identifies the systems to be commissioned, defines the scope of the commissioning process, and estimates the commissioning schedule.


Ellis R.T.,Questions and Solutions Engineering Inc.
Engineered Systems | Year: 2011

Several measures that need to be considered in defining measurable accessibility acceptance criteria early in the building design phase are presented. Most project specifications require that all equipment be installed per the manufacturer's installation instructions. It might be enough to define accessibility requirements in terms of clearances around the equipment. The manufacturer's installation manual should be able to define the accessibility requirements if the controls are manufacturer provided and factory-mounted. It is important to remember that if a device needs to be serviced from above or below, the side clearance is critical in order to allow a maintenance person to actually get to the above or below clear. A vertical clear path needs to be maintained for personnel to access the side of the device if a device only needs service from the side. Another quantitative requirement to consider is distance from the floor.


Ellis R.T.,Questions and Solutions Engineering Inc.
Engineered Systems | Year: 2011

The role of several project team members responsible for commissioning testing or periodic maintenance and repair of an equipment is presented. The owner/operator needs to make sure that reasonable equipment accessibility is part of the owner's project requirements (OPR). The design team needs to specify accessibility in quantifiable, verifiable, and enforceable terms in the contract documents. The construction team needs to take accessibility seriously and work closely with each other to coordinate equipment and control device locations with ductwork, piping, conduit, and ceiling grids that surround the components need to be accessed. The commissioning professional should be responsible for observing and documenting accessibility issues as early in the construction process as possible. The owner/operator and design team should be responsible for rigorously enforcing the specified accessibility requirements.


Ellis R.T.,Questions and Solutions Engineering Inc.
Engineered Systems | Year: 2011

The proper long-term operation of the commissioned systems will depend primarily on the O&M staff after the project and commissioning of the system are complete. O&M staff needs to be actively engaged in the design process that provides them with the opportunity to contribute their experiences to benefit a new construction or major renovation project. The involvement of facilities group to the design table provides them with the opportunity to feel involved and to develop buy-in for the new systems. All O&M requests are though not appropriate or affordable but it should be considered that the reasonable requests from facilities should not be rejected by the design engineers. The design engineers used to take the final decision on system design throughout the formal project in the traditional world of design.


Schlueter P.,Questions and Solutions Engineering Inc.
Engineered Systems | Year: 2011

The team with the best game plan and best execution of that plan usually wins in the market. Considerable effort occurs, sometimes many days in advance, reviewing scouting reports, analyzing game films, and putting together a customized strategy that will increase the chance for success. Bringing the commissioning team together early in the planning stage allows expertise from all fields to be involved in the design process. The contractors need to be brought up to speed on the design and encouraged to provide input and suggestions on how best to deliver that design. Having a commissioning team available to consult when difficult situations arise during construction is many times the most productive and effective way to resolve problems and keep the project moving forward.


Ellis R.T.,Questions and Solutions Engineering Inc.
Engineered Systems | Year: 2011

Commissioning professional need to follow several measures to ensure that system function properly and are accurately documented at the end of construction. The commissioning professional focus on to demonstrate compliance with the design requirements, knowing that work may be of diminished value when the owner changes the system operation after accepting the building. The commissioning professional help the owner push for changeorders to achieve the preferred facility operations system performance. The operations department may need to defer their modifications until after accepting the systems as designed if the owner's project manager's main priority is an onbudget/on-schedule project. Commissioning of the modifications could help ensure that whatever changes the owner makes don't affect the performance of other integrated building systems.


Ellis R.T.,Questions and Solutions Engineering Inc.
Engineered Systems | Year: 2013

The new type of water level gages and multi-aperture technology developed by Qinhuangdao Huadian Measurement & Control Equipment Co. Ltd. (HDSC) has given technical support to perfect the configuration of drum level measurements. Accurate and stable measurements of drum levels are realized through improving the drum level measurement system, optimizing configuration, and solving the flaws existing in principle, structure, and configuration. The multi-aperture can increase the independent measuring point conveniently without opening holes on the boiler drum. The boiler drum will also be supplied with water in time to resume operation if there is water in the drum after a boiler shutdown caused by a temporary feedwater system failure. The successful application of new technology from HDSC for drum level measurement provides accuracy and a reliable basis for drum level monitoring, debugging, and protection. It accurately represents the operation status of the drum level.


Ellis R.T.,Questions and Solutions Engineering Inc.
Engineered Systems | Year: 2010

One of the keys to design phase commissioning is helping to make sure that all of the required dynamic systems operations are understood, clearly defined, and coordinated before a price is set and a contract is signed. This needs to be defined in detail in order to have apples-to-apples bids from contractors who will have little or no room to come back for changeorders later. It is imperative for building owners' project managers to define expected controls design deliverables when procuring design engineering services and enforce those requirements throughout the project.

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