VAV vs VVT | HVAC-Talk: Heating, Air & Refrigeration Discussion
Jan 26, 2005 · VVT is variable Volume & temperature, The VVT system relies heavily upon all the distributed zones having similar conditions.It is a cheap setup IMO to provice any heat to an area it …
linking CCN VVT to RTU Opn and UPC Open - HVAC-Talk
May 28, 2024 · Hi, Existing zones controllers are CCN VVT(part# 33ZCVVTZC-01 v1.2). We just changed out the carrier package units some has Carrier RTU open bacnet card and others has …
Carrier V3 VVT System - HVAC-Talk
Feb 14, 2008 · Can anyone give me a quick run down on the addressing of these controllers? I have several AHUs, with bypass controllers, master zones, and several VVT controls per AHU (less than …
What's New | HVAC-Talk: Heating, Air & Refrigeration Discussion
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JCI - Metasys vs. Facility Explorer - HVAC-Talk
Jan 22, 2010 · Metasys is for JCI branches and Facility Explore is for their agents and is more for commercial work. I remember there is a package VVT controller line in facility explorer. You can't get …
Carrier Parker VAV controls system - HVAC-Talk
Nov 24, 2006 · Carrier marketing thought they invented the direct coupled actuator, but that wasn't until about 2000 so for a 1991 installation you would have damper actuators you really don't want to …
HVAC-Talk: Heating, Air & Refrigeration Discussion
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Replacing 3/4HP compressor with 1/2HP compressor on reach
I have a customer with an Artic Air two door reach in freezer. The original compressor was 3/4HP. The customer purchases a 1/2HP compressor. If I replace the larger compressor with a smaller one, what …
Difference between By pass and Pressure independent VAV...
Apr 19, 2010 · a bypass is just a component of a vvt system, to dump air into the return instead of a vfd. that is in a nutshell!!!!!!!!!! VAV stands for Variable Air Volume. VAV boxes provide constant or …
Controls | HVAC-Talk: Heating, Air & Refrigeration Discussion
Nov 2, 2023 · Discussions about HVAC controls in general including automation, DDC and pneumatics.