38AUZ/D with Twin Furnaces
One popular combination of Carrier equipment is twinning 2 residential furnaces together with a 6-10 ton commercial outdoor A/C unit.…
Author: Steven Simmons
Technical Services Manager
Southwest District
Common Explained
When you’re still green with experience or if you just entered an HVAC apprenticeship, there will be terms or sayings…
What’s Your Resistance?
When assisting with field calls, I ask this question in reference to electrical devices several times a day. The answers…
Ductless Line Set Sizing
When installing Carrier/Bryant Ductless (mini splits) units please refer to the installation manual for the particular model of the unit…
Ecobee 5 Setup for 2 stage with Dehum
One of the most popular combinations right now is the FV4 air handler with a 2 stage outdoor unit with…
All About Heaters
At first glance, a residential strip heat kit could look intimidating. I want to break down the operation and troubleshooting…
Scrolling Marquee Basics and Resetting Error Codes
On units that are equipped with a ComfortLink controls package, the user interface for the machine will include a Scrolling…
What is an Electrical Short?
Everyone has heard the phrase: “it’s shorted.” What does this actually mean and how do you diagnose it? Let’s start…
Where Does the Orange Wire Go On a Carrier Commercial Heat Pump?
Model numbers that this document pertains to: 38AUQ/40RUQ, 50FCQ, 50GCQ, 50HCQ, 50KCQ, 50TCQ No matter how long you have been…
ABB Drives: How to Set Up on a Light Commercial System
Commercial HVAC Have you seen an ABB Variable Frequency Drive or VFD for short? Odds are if you have installed…