Exam 38: Installation

Application of acoustical lining to the interior of a duct is accomplished by using tabs, glue, or both.

What materials are normally used in air-conditioning duct systems?

The line voltage for a system is normally installed by whom?

When the length of quick-connect precharged line sets is altered, the charge will not normally have to be altered.

A split central air-conditioning system is installed with the control transformer located in the attic-hung air handler and the condensing unit located outside. The low voltage wire from the thermostat is run to the ____________________.

____ used at the end of a metal duct run will help reduce any noise that may be traveling through the duct.

When hanging a horizontal air handler, it should be pitched toward the drain port for proper condensate removal.

When installing a split air-conditioning system with a remote condensing unit, the line set may be altered if the standard length was incorrect for installation.

When removing the rubber plugs from a line set, the hiss indicates that the tubing is not leaking.

If a duct system has large air leaks at the connections, what can be used to seal them up?

A trap in the condensate line prevents ____.

The typical gauge wire that is used in low voltage control circuits is ____________________ gauge.

What does a technician do before altering a precharged line set?

What fastener is commonly used with round flexible duct?

One drawback of using custom made, pre-fabricated duct sections is that ____.

The sun shining on the panels and coils of the condensing section will lower the efficiency of the unit.

After refrigerant lines have been installed, they should be evacuated to a(n) ____ vacuum.

Why is it necessary that the crankcase heater heats the compressor crankcase before starting the compressor?

An auxiliary drain pan under the unit is recommended when the evaporator is installed ____.

What two fasteners are used with fiberglass ductboard?