Jim Johnson is the director of training for Technical Training Associates, a Tucson, Ariz.-based firm that provides HVACR technician training DVDs/videos, E-books, and workshops. For more information, call 520-625-6847 or visit www.techtrainassoc.com.
The equipment in this month’s troubleshooting situation is a split system that has only been in service for two years, but there is a lot of history — several service calls since the equipment was installed, and an on-going complaint that the system just doesn’t keep the ranch-style home comfortable.
In this troubleshooting situation, the equipment is an air source heat pump and the customer’s complaint is that even though the thermostat is set at 70° F, the temperature in the conditioned space remains near 65°.
In this troubleshooting situation we have a customer who reports that when they turned on their nine-year-old electric furnace at the beginning of the heating season, they considered that the run cycles may have been excessive.
This month’s troubleshooting situation involves a Rheem RRMA-A048JK10X gas pack. The customer called for service because, instead of warm air being delivered from the supply registers, all they are feeling is cold air.
In this troubleshooting situation, the customer has called to report a “no heat” problem. The equipment is a 5-ton, 230 VAC single-stage gas/electric package unit that employs an integrated furnace control and a constant torque blower motor.
First, a bit of history… This facility, a small office complex, was built a little more than a decade ago, and the required carbon monoxide safety monitor in the equipment room was disabled at the beginning of the first heating season because there was an ongoing problem with it being activated from time to time.
In this month’s troubleshooting situation, our problem involves a 4-pin compressor that uses both an internal and external overload protector. Two other factors in regard to this particular piece of equipment are: A single-pole contactor is used in the compressor circuit, and it is equipped with high and low pressure switches that act as protective devices.
In this issue of The NEWS, we focus on the Internet of Things and its effect on the HVAC industry, examining its impact on the skilled trades labor shortage, on cybersecurity, and on the popularity of self-healing buildings.