Solar Load & Structure Design
Locating most of a desert home’s windows on the north and south sides helps reduce this.
What is solar load?
Why would multiple evaporator circuits be used?
What is to prevent excessive refrigerant pressure drop?
Dirty condenser coils cause what?
What is reduced efficiency?
Package systems differ from split systems because they are fully what?
What is factory-assembled and charged?
A more accurate rating considering full-cycle operation is called what?
What is SEER?
The solar load on a structure is heat gain from what source?
What is radiation from the sun?
Popular material combo for coils: copper tube with ___ fins.
What is aluminum?
High-efficiency condensers have what advantage?
What is more surface area?
Which refrigerant lines need to be field-installed on a package unit?
What is none?
The steady-state rating that ignores startup time is called what?
What is EER?
True or False: Roof insulation helps minimize heat gain when no attic exists.
True
Reciprocating compressor motors are cooled mainly by what?
What is air over the shell and discharge gas?
Condensers exposed to salt air should use what type of screws?
What is stainless steel?
True or False: Return ducts never need insulation.
False
Ratings that aren’t fully accurate are called what?
What are nominal ratings?
In what climate factor must equipment selection consider local moisture content?
What is humidity?
Rotary compressors are cooled by what?
What is suction gas?
True or False: High-efficiency condensers can be too efficient on cool days.
True
Supply ducts need insulation when run through what?
What is unconditioned space?
True or False: The larger the EER, the less efficient the system.
False
Windows on the west side increase this type of load most during afternoons.
What is solar gain?
At what temp does an evaporator typically boil in standard systems?
What is 40°F?
At what air temperature does AHRI rate condensers?
What is 95°F?
Most occupants operate systems at what temperature?
What is 75°F?
At typical operation, high-efficiency systems have an evaporator boiling point of what?
What is 45°F?