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Service & Maintenance

Can You Reduce Chiller Maintenance?

I simply don’t know of any way to reduce chiller maintenance (recommended scheduled maintenance), below industry standards and manufacturer recommendations, without reducing the system’s long-term efficiency and working life.


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Btu Buddy 104: Bob and Tim Continue Heat Pump Repairs

Bob and Tim have arrived back at the apartment building where they have been working for several days inspecting and making necessary repairs to the building’s split-system heat pumps. Bob said, “Check the list for another unit that seemed to have a problem and let’s take a closer look at it.”


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Troubleshooting Challenge: A Gas Furnace That Won’t Fire

In this situation we have a customer who has called for service on their gas furnace, and the description of the problem is “no heat at all.” The customer also reports that this is the first time they’ve had to call for service on their 10-year-old unit.


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Btu Buddy 103: Bob and Tim Begin Heat Pump Repairs

Bob and Tim have arrived at the apartment house that they have been working at for the last several days. They’ve gone to the roof where the outdoor units are located. There are 60 heat pumps that use R-22 as the refrigerant. They start with Unit No. 2.


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Kitchen Ventilation: Baffled by Filters?

It is important to understand grease extraction and new options in capturing grease particulate efficiently near the source. A commonly overlooked byproduct of many cooking processes is grease — overlooked, that is, until it causes problems at a restaurant facility.


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Btu Buddy 102: Continuing the Inspection of Multiple Split-System Heat Pumps

Bob and Tim are on the second day of an inspection of an apartment house building that has multiple split-system heat pumps. They have inspected all 60 outdoor units on the roof. They are now going to inspect the indoor units.


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Troubleshooting Challenge: A Heat Pump That Won’t Cool

In this troubleshooting situation, the equipment you’re servicing is a 240-volt, single-phase split system in a small office, and the customer’s complaint is that the system is blowing warm air.


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Btu Buddy 101: Bob Trains Tim on His First Service Call

Bob and Tim have arrived at Tim’s first service call. Tim asked Bob, “What is this call all about?” Bob said, “This is a new customer that wants us to take over the maintenance work for this apartment house.”


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Beyond the Flange

In a previous article on chilled water systems we focused on maintenance of the “heart” of the system, the chiller.


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Btu Buddy 100: Dual-Voltage, Nine-Lead Motors

Btu Buddy has met Bob for lunch to answer some questions that Bob had about yesterday’s service call. Bob asked, “Why did that motor have two contactors and so many wires going to it? It seemed very confusing. I am glad that I tagged those motor leads when I disconnected the motor. I never would have figured out how to reconnect the leads.”
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2014 SMACNA Annual Convention

Views from the 2014 SMACNA Annual Convention in San Antonio.

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NEWSMakers: Chris Mathis

Chris Mathis, president of Mathis Consulting Co. and vice chair of ASHRAE’s residential ad hoc committee, talks about ASHRAE’s exploration into the residential market. Posted on Oct. 17.

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2014 October 27

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EFFICIENCY STANDARDS

DOE has denied AHRI’s petition for reconsideration of walk-in standards. Is it getting harder to reach consensus on efficiency standards?
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2015 National Plumbing & HVAC Estimator

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

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