Extra Edition / Technical

Helping 30-Year-Old Apartments Still Bring The Heat

March 18, 2003
/ Print / Reprints /
ShareMore
/ Text Size+
Village Green is an upscale rental apartment community that has 32 boiler rooms feeding 1,168 units.
BUDD LAKE, N.J. — Village Green, located here, is an upscale rental apartment community that sports many amenities, including two swimming pools, tennis courts, a jogging track, and baseball field — but one amenity is considered much more important when the chilling northern New Jersey winter hits town — consistent heat.

“We have 32 boiler rooms feeding 1,168 units with an average distance from the heater to the unit of 250 feet, much of it underground and around corners,” said Glenn Reynolds, property manager of the community. “Getting the right boiler and pump combination to move the heat swiftly and evenly has been a much bigger part of this job than I thought it would be when I signed on 10 years ago.”

Each boiler room sports a primary/secondary system with three 16-unit residential buildings on each loop. The total average line length served by each boiler room is 400 feet, a challenging application made more so by the age of the apartment buildings, Reynolds noted.

“We’ve had so many different pumps installed over the years that it became a real maintenance hassle. Whenever we had a problem, the repairman we dispatched had to keep five to 10 different pumps in the truck because he didn’t know what he’d find when he got to the room,” Reynolds said. “During 30 years, standards such as R factor change and pump designs change. Keeping everything running is a challenge.”

Even piping standards have migrated from the 1/2-inch line common in the 1970s and 1980s to the 3/4-inch line common today, changes which affect not only the size of the pump necessary to work on the line, but the flange connections and the baseboard space needed as well.

One of the changes Reynolds has recently implemented is a switch to direct-coupled in-line single stage circulating pumps — TP 50, TP 60, and TP 120 pumps from Grundfos Pumps of Olathe, Kan. — replacing a number of older pumps that didn’t have the flow to accommodate the sludge and calcium buildup caused by the mineral-heavy well water used by the complex. The TP pumps have very loose tolerances and are typically used in aggressive applications characterized by hard water and aging pipes. In addition to providing the high-flow necessary to tolerate the minerals in the system, the pumps are also designed to require only minimal maintenance — the replacement of a mechanical seal every several years, says Grundfos.

Glenn Reynolds, property manager of Village Green, is shown with one of the new TP pumps, designed to accommodate the calcium buildup caused by the mineral-heavy well water used by the complex.

Calcium Buildup Demands High-Flow Configurations

“We see calcium buildup both in the pumps and the boilers over time; it’s just in the ground here,” stated Reynolds. “Buildup can really create problems with less tolerant pumps.”

The renovation also includes a new boiler set-up currently being tested that will pipe each room’s two boilers in a twin loop on the same line, reducing by half the number of pumps necessary to provide heat.

Currently, all of the boiler rooms except the 12 test rooms have separate primary/secondary systems, each with their own pump. The switch to the TP pumps has cut the maintenance time needed for each boiler room where they are installed.

Universal Supply, of Wharton, N.J., the local plumbing supply house, identified the pump problem with help from a Grundfos representative based on an analysis of the failure rates of the previous pumps and recommended the switch to high-flow pumps.

“We determined that the older pumps had sticking problems caused by the calcium and that we could upgrade them to a high-flow pump with a fairly straightforward swap,” said Pete Czyzewski, assistant branch manager, Universal Supply Group. “The range of configurations available in the Grundfos TPs made it easy to do a general replacement because there were pumps available that could deal with the many different sizes, flow, and head configurations demanded by the different applications.”

The pump sizing process wasn’t without trial and error, Czyzewski recalled, commenting, “Grundfos stood out by backing their products with service. It was Grundfos’ committed service people that helped us identify the problems with the previous pumps and identify the TP line as the long-term solution.”

The move to standardize the boiler rooms has also allowed Reynolds to add energy-efficient new boilers, which is expected to not only save money in operating costs but also reduce service costs.

The new boilers, Patterson-Kelley Thermifics, from Patterson-Kelley Co. of East Stroudsburg, Pa., incorporate modern controls that adjust for outside temperature before delivering heat to the units, which significantly increases energy efficiency by allowing for lower heat loss during transit. One boiler room is testing the Patterson-Kelley Modu-Fire boiler that incorporates a full modulation firing rate, in which the heat supplied to the units can scale from 1.2 million Btu down to 240,000 Btu.

Unlike standard boilers that operate with on-off controls, the Modu-Fire boiler is able to put out less heat more evenly to meet the variable load conditions with heating and domestic water requirements. After a successful test in 2002 confirmed the improved energy efficiency of the Modu-Fire boilers over the older cast-iron boilers used in the remainder of the complex, work began in 2003 to install the newer units in two additional boiler rooms.

“The Modu-fire boilers solved a lot of problems with short cycling,” said Dennis Miller, president of Miller Mechanical Corporation, Sayreville, N.J., the mechanical contractor who has handled the pump and boiler installations for Village Green. “The low turndown ratio of five to one when there is a low load means that the boiler can run at 20 percent of maximum and not cycle, even during cold weather. That cuts energy costs and provides superior comfort for the residents.”

The renovation includes a new boiler set-up currently being tested that will pipe each room’s two boilers in a twin loop on the same line, reducing by half the number of pumps necessary to provide heat.

A Chilly Day Leads To Changes

“Martin Luther King Jr. Day in 2000 was bitter cold and with everyone home for the holiday, we had 150 service calls about the heat,” said Reynolds.

While most of the calls were not the result of non-functioning systems, the volume did lead the property manager to make changes to protect resident comfort in the face of abrupt drops in temperature. In addition to switching to higher-efficiency boilers, Reynolds and his crew also took a more basic step — they insulated all of the garage doors in the complex with 1-inch foam.

“The next year we cut the calls to single digits,” he added. “The new boilers and the time we spent installing just a little more insulation paid off with a significant boost in comfort for the residents.”

These changes made a big difference to the property staff, which includes Reynolds, an assistant property manager, five superintendents, three groundskeepers, one carpenter, and one tile man, in addition to several administrative positions. “We do almost all of our repairs in-house,” he said. The staff is also responsible for repainting and refurbishing apartments each time a resident moves.

By switching to the new boilers and pumps, Reynolds has been able to keep visits to each boiler room to check for problems at once every 30 days, which has helped in managing the overall complex.

Consistent Maintenance Critical To Tenant Relations

“The people who live here are solidly middle-class people with families — they are very familiar with tenant rights’ laws in the state and have options if the service on their apartments isn’t satisfactory,” said Reynolds. “The operator, Segal Realty Associates of N.J., LLC, invests a large sum of money in groundskeeping, maintenance, and holiday-oriented special events to attract and keep reliable renters.”

Village Green hosts a holiday gathering with sleigh rides, an annual horse pulled wagon, as well as seasonal recreation activities. Maintaining the grounds is a priority — the community has a large annual flower budget, for example.

Many needs — from utility maintenance to groundskeeping — compete for staff attention on a day-to-day basis. Reynolds needs to keep the time spent “underground” with the boilers at a minimum in order to keep the roads clear and the grounds groomed.

“The new system has us consuming less energy, using fewer pumps, and spending no time on pump maintenance,” Reynolds concluded. “I’m looking forward to getting all the boiler rooms upgraded.”

For more information on Universal Supply, contact Pete Czyzewski, assistant branch manager, 42 Meadow Ave., Wharton, NJ 07885; 973-366-1800; usginc@worldnet.att.net; www.usginc.com.

For more information on Miller Mechanical Corporation, contact Dennis Miller, president, Miller Mechanical, Sayreville, N.J.; 732-539-8175; milmec@optonline.net.

For more information on Grundfos Pumps, contact Hans Kircher, North American HVAC segment director, 17100 W. 118th Terrace, Olathe, KS 66061; 913-227-3400; hkircher@grundfos.com; www.grundfos.com.

For more information on Village Green Apartments or Segal Realty Associates, contact Glenn Reynolds, property manager, 100 Route 46, Mount Olive, NJ 07828; 973-347-0131; www.segalandsegal.com.

Publication date: 03/24/2003

Did you enjoy this article? Click here to subscribe to The NEWS Magazine

You must login or register in order to post a comment.

Multimedia

Videos

Image Galleries

2014 MCAA Annual Convention

Scenes from the 2014 MCAA Annual Convention in Scottsdale, Ariz.

Podcasts

Kyle Gargaro, editor-in-chief of The NEWS, hosted the 2014 ACCA CEO Forum. At the event, six well-known, highly respected company executives, Gary Michel, Ingersoll Rand/Trane; Chris Nelson, Carrier Corp.; Chris Peel, Rheem Mfg. Co.; Rod Rushing, Johnson Controls; Brent Schroeder, Emerson Climate Technologies; and Doug Young, Lennox; provided individual industry outlooks and fielded questions directly from attending contractors. Listen to the entire event on the NEWSMakers podcast. Posted on April 14.

More Podcasts

THE MAGAZINE

ACHRNEWS

NEWS 04-14-14 cover

2014 April 14

Check out the weekly edition of The NEWS today!

Table Of Contents Subscribe

SERVICE CALLS POLL

Which statement on service calls best applies to your business?
View Results Poll Archive

HVACR INDUSTRY STORE

plumbing-hvac.gif
2014 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

More Products

Clear Seas Research

 

Clear Seas ResearchWith access to over one million professionals and more than 60 industry-specific publications, Clear Seas Research offers relevant insights from those who know your industry best. Let us customize a market research solution that exceeds your marketing goals.

DON'T MISS A THING

Magazine image
 
Register today for complete access to ACHRNews.com. Get full access to the latest features, Extra Edition, and more.

STAY CONNECTED

facebook icontwitter iconyoutube iconLinkedIn i con