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    MSC Blog & News

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    Plan of Control for Start Up and Commissioning
    Successful Retro-Commissioning Project
    Building Automation and Air Balance Emergency Project
    Many HVAC Mechanical Failures - Preventable
    Importance of Mechanical Cooling
    Before A/C: Early Homes Cooled Through Smart Architecture
Monday October 16, 2017
In order to achieve success on any project, you must have a Plan of Control. While every project has a schedule,...
Monday September 25, 2017
MSC, as a true HVAC service company, recognizes that there is usually much greater value in optimizing your existing systems...
Wednesday September 6, 2017
Rising temperatures and unstable conditions in a critical area set off immediate concerns at a medical research facility in northern...
Thursday August 17, 2017
When it comes to HVAC breakdowns, the causes generally fall into two categories. About eighty percent can be attributed to...
Thursday August 3, 2017
In the late 19th and early 20th centuries, life in America was profoundly different. But with the development of modern...
Tuesday July 25, 2017
During times prior to electric fans and the modern day HVAC system, keeping temperatures cool in businesses and homes was...
Wednesday July 5, 2017
A local engineering firm contacted MSC about a client that had been experiencing multiple problems with various mechanical systems throughout...
Monday June 19, 2017
MSC was performing startup and commissioning of chillers and cooling towers at a new pharmaceutical plant in central New Jersey....
Tuesday June 6, 2017
On a recent lab and office renovation project in Reno, it quickly became clear that the fast-track project schedule was...
Thursday May 25, 2017
Here in the United States, HVAC accounts for between 50-70% of primary energy consumed in commercial and industrial buildings. Adding...
Monday May 8, 2017
It’s an age-old problem encountered by HVAC, process cooling and building automation service contractors, time and time again: sophisticated building...
Friday April 28, 2017
A lyophilizer, or freeze dryer, is one of the most important pieces of equipment in a pharmaceutical plant. It is...
Monday April 17, 2017
The tried and true method used for process waste heat removal has long been the cooling tower. There are several...
Friday March 17, 2017
Keeping a daily log of chiller operating conditions is an important component in keeping your equipment running smoothly and efficiently....
Thursday March 2, 2017
Mechanical Service Corporation, better known as MSC, is not a mechanical contractor. MSC is the Northeast’s leading service subspecialist in...
Friday February 17, 2017
The 2017 AHR Expo, held this year in Las Vegas has announced its annual Innovation Award winners in ten separate...
Saturday February 4, 2017
When it's cold outside, using environmental conditions to cool a building or process makes perfect sense. For facilities with chilled...
Monday January 2, 2017
We all know what happens when you take a cold soda from the fridge on a hot summer day: condensation...
Monday December 12, 2016
A customer recently contacted MSC with HVAC problems they were having at their large facility that seemingly originated with doors. Occupants...
Wednesday November 23, 2016
Here's an all-too-common scenario: a large construction project is proceeding according to its aggressive schedule when it hits a series...
Sunday November 6, 2016
Accurate, dependable information is key to making any decision. Building owners and engineering firms often outsource HVAC-R and building automation...
Thursday October 6, 2016
VRF (variable refrigerant flow) technology is rapidly growing here in North America in both residential and commercial applications. HVAC technology developed...
Monday September 19, 2016
Many HVAC systems are designed to run during a power failure in a brown out or black out. They are...
Saturday September 3, 2016
When Harry Hartigan founded his company in the late 1970s, MSC’s primary specialty was process cooling for vapor recovery systems...
Thursday August 11, 2016
Building automation systems as you know control a buildings environment. However building automation systems are reaching a lot further to...
Wednesday August 3, 2016
The National Environmental Balancing Bureau, or NEBB, is an international non-profit association that provides certification of firms, professionals and technicians...
Thursday July 14, 2016
EPA’s SNAP Program: Identifies Climate-Friendly Refrigerants, Prohibits Harmful Ones The use of HFCs is growing rapidly as the Montreal Protocol ban...
Monday July 4, 2016
Retro-commissioning is the application of the commissioning process to existing buildings in order to improve how mechanical, electrical and controls...
Sunday June 12, 2016
When people hear about air pollution, we generally think about outdoor air. Did you know that, according to the EPA,...
Tuesday June 7, 2016
Air and water balancing is a method of regulating HVAC air supply, return, and exhaust, or the flow of water...
Sunday May 22, 2016
There are many factors that can contribute to poor indoor air quality, but microorganism growth in HVAC systems is...
Monday May 2, 2016
Proper water treatment and a stringent preventive maintenance program are imperative when it comes to cooling towers in industrial, commercial...
Tuesday April 12, 2016
Energy management is the process of monitoring, controlling, and conserving energy and utility costs in a building or facility.  When...
Monday April 4, 2016
MERV Rating (Minimum Efficiency Reporting Value) is a standard developed by ASHRAE in 1987 to measure the overall effectiveness of...
Thursday March 10, 2016
Process cooling is a critical requirement for cooling, refrigeration, heat extraction, and maintaining temperature during manufacturing or other processes. Process...
Wednesday March 2, 2016
As an HVAC and controls service specialist, much of MSC’s business comes from clients who are frustrated with...
Saturday February 13, 2016
When a variable-frequency drive, or VFD, malfunctions, costly downtime often ensues. It is important to take the...
Thursday February 4, 2016
Transformative Wave CATALYST is a rooftop unit (RTU) retrofit that has been proven to reduce HVAC energy usage by 25%-50%....
Monday January 11, 2016
Every good facility manager knows that preventive maintenance is absolutely critical to the efficiency and longevity of an HVAC system....
Wednesday July 29, 2015
Gas PRV Problem - A large new project had issues with gas boilers and package AHUs shutting off due to...
Tuesday July 14, 2015
When odd, unexplained VFD (variable frequency drive) problems have you baffled, electromagnetic induction issues could be at work. Induction usually...
Friday July 10, 2015
Low Exhaust - MSC was called in to troubleshoot a low exhaust airflow condition. Though the exhaust boxes were constant-volume...
Monday June 1, 2015
When it comes to control systems, plan and specification projects, better known as plan-and-spec have a number of drawbacks that...
Sunday May 24, 2015
Water hammer is a troublesome but commonly-occurring issue that can plague a steam system. The most obvious symptom is the...
Tuesday April 7, 2015
Refrigerant leakage is too often regarded as more of a nuisance than the more serious problem it actually is. Detecting...
Sunday March 22, 2015
When clients are considering replacing their HVAC equipment, MSC is often asked to compare the energy efficiency of old equipment vs....
MSC




Successful Retro-Commissioning Project



Monday September 25, 2017

MSC, as a true HVAC service company, recognizes that there is usually much greater value in optimizing your existing systems as opposed to replacing equipment and controls. One of the best means of system optimization is retro-commissioning, which is closely akin to energy engineering. 

Case in point, soon after a new owner took over an existing facility, management was taken aback when the first utility bills began coming in. Energy costs for running the HVAC systems - 100% outside air and exhaust systems with chilled water and hot water reheat - were far higher than anticipated for a facility of its type and size. MSC was called in to see what could be done to optimize their facility. After meeting with the engineer of the new facility, reviewing the building’s HVAC drawings and building automation system graphics and controls, and conducting a one-day survey of the systems and their intended functionality, retro-commissioning was recommended.

The variable frequency drives operating the large exhaust fans were found to be running at 60 Hz, or full speed. Static pressure in the exhaust system was running at 2.5 inches with a set point of 3 inches. Pressure testing of the exhaust ductwork found significant leakage throughout, and much of the exhaust air was being drawn not from the occupied space below but from the ceilings areas above. MSC technicians identified broken and leaking ductwork flanges and fittings. The system was pressure tested again and passed with low leakage. Exhaust fans immediately ramped down to maintain a set point of 2.5 inches and VFDs maintained at 40 Hz. 

Next up for retro-commissioning was the chilled water system. Extremely dirty water had plugged strainers and deposited sediment in coils and piping. MSC flushed and cleaned the system with clean water and installed a rust inhibitor. The HVAC chilled water coils and condensers were power washed and cleaned, as were condensate pans and traps to optimize heat transfer and condensate flow.  A temperature profile of the cooling coils conducted afterward showed uniform temperatures.

Discharge air and exhaust temperature sensors were recalibrated to read accurately. A traverse of flow stations throughout the facility found that flow was way off, and in many cases needed to be corrected to read properly. Reheat hot water was flushed and cleaned when several of the reheat coils at the far end of the loops were found to be plugged with sediment and not operating. Reheat hot water temperature differential pressure was reset and the system temperature was lowered to maintain 145F. Unoccupied air flows were significantly decreased for off hours. A static discharge pressure reset was implemented to lower static pressure depending on the percentage of VAV box damper positioning. 

Functionality of the package chillers was optimized through a reprogramming of the BAS to bring specific equipment and compressors online depending on chilled water flow, valve position, discharge air temperature, and exhaust temperature. A new high-accuracy outside air temperate and humidity sensor was installed to replace the old device that was malfunctioning and could not be recalibrated. VFDs were reprogrammed with auto-restart and catch-on-the-fly function to prevent power blips from shutting down systems and requiring them to be restarted manually.

The facility management and maintenance team were highly engaged throughout the retro-commissioning process, gaining an in-depth education on their new building systems, its problems, and the solutions being implemented to correct them. New filters were installed throughout the facility by the maintenance group and filter racks were repaired where needed.  Together, MSC and facility personnel configured and tested new graphics, alarm set points and system parameters. Technicians installed a new Sequence of Operation that could be accessed with a click of a button on each graphic for ease of use. Trend logs were set up for monitoring and recording system performance. 

In the end, the new owners were extremely pleased with MSC’s comprehensive retro-commissioning. Existing systems and equipment were running at optimal efficiency, there was an immediate drop in energy bills, and there was a noted improvement in occupant comfort. 

MSC - Mechanical Service Corp.
41 South Jefferson Road
Whippany, NJ 07981
973-884-5000

http://www.mscnj.com/contact-MSCNJ.php

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