Exam 40: Typical Operating Conditions

At typical operating conditions, the standard air-conditioning system will operate with an evaporator boiling point of ____°F.

The ____ rating is a steady-state rating and does not account for the time the unit operates before reaching peak efficiency.

Most occupants will normally operate their system at about ____°F.

AHRI rates condensers with ____°F air passing over them.

Ratings that are not completely accurate are known as ____.

A more accurate rating system for air-conditioning equipment that takes into consideration operation during the complete cycle is the ____ standard.

A normal evaporator superheat at the evaporator outlet in a standard efficiency air-conditioning system operating under design conditions will be ____°F.

The larger the EER rating, the less efficient the equipment.

Typically, the fan will run on high speed when the outdoor temperature is above ____________________°F.

Why does high-efficiency air-conditioning equipment use a thermostatic expansion valve?

A four-pole motor runs at ____________________ rpm.

What are three things that must be considered when the manufacturer publishes typical operating conditions?

High efficiency condensers can actually be too efficient on cool days.

The evaporator ____________________ heat.

A 4-ton air-conditioning system that requires an input power of 5 kW would have an energy efficiency ratio of ____________________.

The condenser ____________________ heat.

Since the evaporator absorbs both sensible and latent heat, humidity must be taken into account and considered part of the load on the evaporator.

Why does the high efficiency system have a higher operating efficiency?

For residential air-conditioning units, ____________________ V single-phase is the typical voltage.

What is starting point for considering electrical operating conditions?