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DDC Glossary - Direct Digital Controls
Ohm's Law (P) power, (E) voltage, (I) current, and (R) resistance
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
Transmission Control Protocol - Internet Protocol
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
Air conditioning equipment is designed to operate at its rated capacity and efficiency at one set of design conditions
Superheat
Subcooling
The term Air Conditioning refers to the cooling and dehumidification of indoor air for thermal comfort
The rating is not complete using system of EER so a rating of SEER has been developed. This rating is tested and verified by a rating agency, and includes the startup and shutdown cycles
     

 

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Alternative Refrigerants
Low and Medium-Temperature Commercial Refrigeration
Long-Term Replacements

ASHRAE # Trade Name Manufacturer Replaces Type Lubricant (a) Applications Comments

R-507
(125/143a)

AZ-50

AlliedSignal

R-502 &
HCFC 22

Azeotrope

Polyol Ester

New Equipment &
Retrofits

Close Match to R-502; higher efficiency than R-22 at low temperature

507

Dupont

R-404A
(125/143a/134a)

404A

AlliedSignal
Elf Atochem

R-502 & HCFC 22

Blend
(small Glide)

Polyol Ester

New Equipment & Retrofits

Close Match to R-502; higher efficiency than R-22 at low temperature

HP62

Dupont

R-407D
(32/125/134a)

407D

ICI

R-500

Blend (Moderate Glide)

Polyol Ester

New Equipment & Retrofits

Slightly Higher Capacity

R-12 Low Temp.

Low and Medium-Temperature Commercial Refrigeration
Interim Replacements  (b)

ASHRAE #

Trade Name

Manufacturer

Replaces

Type

Lubricant (a)

Applications

Comments

R-402A
(22/125/134a

HP80

Allied Signal
Dupont

R-502

Blend
(small glide)

Alkylbenzene
or Polyol Ester

Retrofits

Higher Discharge Pressure than R-502

R-402B
(22/125/290)
HP81 Allied Signal
Dupont
R-502 Blend
(small glide)
Alkylbenzene
or Polyol Ester
Ice Machines Higher Discharge Temperature than R-502
R-408A
(125/143a/22)
408A AlliedSignal
Dupont
Elf Atochem
R-502 Blend
(small glide)
Alkylbenzene
or Polyol Ester
Retrofits Higher Discharge Temperature than R-502

Very Low Temperature Commercial Refrigeration
Long Term Replacements

ASHRAE # Trade Name Manufacturer Replaces Type Lubricant (a) Applications Comments
R-23 HFC-23 AlliedSignal
Dupont
ICI
R-13 Pure Fluid Polyol Ester New Equipment & Retrofits Higher Discharge Temperature than R-13
R-508B
(23/116)
508B AlliedSignal R-13 & R-503 Azeotrope Polyol Ester New Equipment & Retrofits  
95 Dupont
R-508A
(23/116)
508A ICI R-13 & R-503 Azeotrope Polyol Ester New Equipment & Retrofits  

Medium Temperature Commercial Refrigeration
Long Term Replacements

ASHRAE # Trade Name Manufacturer Replaces Type Lubricant (a) Applications Comments
R-134a
HFC-134a
AlliedSignal
Dupont
Elf Atochem
ICI
CFC-12
Pure Fluid
Polyol Ester
New Equipment & Retrofits
Close Match to CFC-12

Medium Temperature Commercial Refrigeration
Interim Replacements (b)

ASHRAE #
Trade Name
Manufacturer
Replaces
Type
Lubricant (a)
Applications
Comments
R-401A
(22/152a/124)
MP39
AlliedSignal
Dupont
CFC-12
Blend (Moderate Glide)
Alkylbenzene or Polyol Ester or in some cases Mineral Oil (d)
Retrofits (c)
Close to CFC-12 Use where evap temperature -10ºF or Higher
R-401B
(22/152a/124
MP66
AlliedSignal
Dupont
CFC-12
Blend
(moderate glide)
Alkylbenzene or Polyol Ester
Transport (c)
Refrigeration Retrofits
Close to CFC-12Use where evap. temperature below-10ºF
R-500
Alkylbenzene or Polyol Ester or in some cases Mineral Oil (d)
Retrofits including Air Conditioners & Dehumidifiers
B-406A
(22/142b/600a)
GHG
Peoples Welding Supply
CFC-12
Blend (high glide)
Mineral Oil or Alkylbenzene
Retrofits
Can Segregate to Flammable Composition
R-409A
(22/124/142b)
R-409A
AlliedSignal
Dupont
Elf Atochem
CFC-12
Blend (high glide)
Alkylbenzene or Polyol Ester or in some cases Mineral Oil (d)
Retrofits (c)
Higher capacity than CFC-12. Similar to MP66
R-414A (pending)
(22/124/142b/600a)
Autofrost
Peoples Welding Supply
CFC-12
Blend (high glide)
Alkylbenzene or Polyol Ester or in some cases Mineral Oil (d)
Retrofits
Similar to 409A
R-414B (pending)
(22/124/142b/600a)
Hot Shot
ICOR International
CFC-12
Blend (high glide)
Alkylbenzene or Polyol Ester or in some cases Mineral Oil (d)
Retrofits
Similar to 409A
R-416A (pending)
(124/134a/600)
FRIGC FR-12
Intercool Energy
CFC-12
Blend (small glide)
Polyol Ester
Retrofits

Lower Pressure than 134a at high Ambient Conditions

Commercial and Residential Air Conditioning Long Term Replacements

ASHRAE #
Trade Name
Manufacturer
Replaces
Type
Lubricant (a)
Applications
Comments
R-123
HCFC-123
AlliedSignal
Dupont
Elf Atochem
CFC-11
Pure Fluid
Alkylbenzene or Mineral Oil
Centrifugal Chillers
Lower Capacity than R-11. With Modifications, equivalent performance to CFC-11
R-134a
HFC-134a
AlliedSignal
Dupont
Elf Atochem
ICI
CFC-12
Pure Fluid
Polyol Ester
New Equipment & Retrofits
Close Match to CFC-12
HCFC-22
Pure Fluid
Polyol Ester
New Equipment
Lower Capacity than HCFC-22 Larger Equipment Needed
R-410A
(33/125)
AZ-20
AlliedSignal
HCFC-22
Azeotropic Mixture
Polyol Ester
New Equipment
Higher Efficiency than HCFC-22 Requires Equipment Redesign
9100
Dupont
410A
Elf Atochem
R-407C
(32/125/134a)
407C
AlliedSignal
Elf Atochem
ICI
HCFC-22
Blend (high glide)
Polyol Ester
New Equipment & Retrofits
Lower Efficiency than HCFC-22 Close Capacity to HCFC-22
9000
Dupont

(a) Check with the compressor manufacturer for their recommended lubricant
(b) Interim replacements contain HCFCs, which are scheduled for phaseout under the Montreal Protocol
(c) Not recommended for automotive air conditioning
(d) for more information on when to use mineral oil, see Applications Bulletin GENAP1, "Are oil changes needed for HCFC Blends".

Information Courtesy of AlliedSignal, Inc 1998

 

 

 

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

 

 

 

 

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