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DDC Glossary - Direct Digital Controls DDC Glossary - Direct Digital Controls
Ohm's Law (P) power, (E) voltage, (I) current, and (R) resistance Ohm's Law (P) power, (E) voltage, (I) current, and (R) resistance
DIP Switches - Dual Inline Package Switches DIP Switches - Dual Inline Package Switches DIP Switches - Dual Inline Package Switches
Puron - Puron refrigerant is Carrier's registered trademark for a refrigerant blend with the generic ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers designation R-410A Puron -  Puron refrigerant is Carrier's registered trademark for a refrigerant blend with the generic ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers designation R-410A
The TAC NETWORK 8000 MICROZONE II (MZII) is a fully programmable controller that enhances the TAC NETWORK 8000 Facility Management System
HVAC Acronyms
Category 5 cable includes four twisted pairs in a single cable jacket Category 5 cable includes four twisted pairs in a single cable jacket
Air conditioning equipment is designed to operate at its rated capacity and efficiency at one set of design conditions Air conditioning equipment is designed to operate at its rated capacity and efficiency at one set of design conditions
Superheat
Subcooling

 

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Design Condition

Air conditioning equipment is designed to operate at its rated capacity and efficiency at one set of design conditions. This design condition is generally considered to be at an outside temperature of 95 degrees Fahrenheit, and at an inside temperature of 80 degrees Fahrenheit, with a relative humidity of 50%.

When a piece of equipment is rated at 3 tons, it will perform at a 3- ton capacity or 36,000 Btu/hr under the stated conditions.

When these conditions change, so does the unit capacity, (net refrigerating effect).

1 ton of refrigeration = 12,000 Btu / Hr. 288,000 Btu / 24 Hr.
1 horsepower = 746 watts
3.413 Btu = 1 watt
1000 watts = 3,413 Btu

 

 

 

 

 

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Super Heat / Subcooling

What You Should Know about Refrigerants When Purchasing or Repairing a Residential A/C System or Heat Pump

 

 

 

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HVAC Acronyms The TAC NETWORK 8000 MICROZONE II (MZII) is a fully programmable controller that enhances the TAC NETWORK 8000 Facility Management System TCP/IP - Transmission Control Protocol - Internet Protocol Superheat Subcooling