PACUs & Rooftops
Air-cooled packaged chillers utilize a(n) ___ to increase efficiency.
What is an electronic Electronic Expansion Valve
Rooftop VAV units are designed to produce a constant discharge air temperature of ___°F.
What is 55
A ___ should be the same size as the flanged opening around the outlet of the air handler and should extend at least 3' from the unit before turning or branching off into duct runs.
What is the supply plenum
___ are located based on the supply air pattern desired in each space and the location of the supply ductwork.
What is Registers
This is the mascot of St. Peters
What is Peacock
A typical rooftop single-zone unit consists of a supply fan, one or more _____, one or more stages of heating, controls, ductwork, and power connections.
What are stages of cooling
Many VAV system problems are caused by the improper location of the ___.
What is the Static Pressure Sensor
A(n) ___ is a booklet that typically offers the best way to use heat pump equipment for an application and contains specific preventive maintenance recommendations for the equipment.
What is the owner manual
Forced-air heating systems consist of furnaces, ductwork, registers, grills, fans, and ___.
What is controls
This is the mascot of Marshall
What is the Thundering Heard
Air-cooled packaged chillers typically use ____ refrigerant and are precharged with an initial oil charge as well.
What is R-410A
A thermostat should not be installed in a location that is ___.
What is in the line of direct airflow from supply registers
Air-source heat pump filters must be listed as Class ___ furnace air filters.
What is 2
___ must be located where a connection can be made to the return air ductwork.
What is Grills
This is the mascot of Arizona State
What is a Sun Devil
Before installing a light commercial system it is a good idea to check the site for ___.
What is Access and Clearance
A unit should not be operated and/or started without ___ in place, otherwise damage and/or contamination of the evaporator coil can occur.
What is air filters
The two sections of a heat pump are the air handler and the ___.
What is outdoor unit
___ typically operate with a temperature increase of about 80°F to 100°F.
What is Combustion furnaces
This is the mascot of Northwestern
What is a Wildcat
For cooling, most rooftop units use a(n) ___ cycle.
what is standard DX compression
A crankcase heater needs to be energized for up to 24 hr before ___ startup.
What is the compressor
When a return air plenum is used, the ___ must be immediately in front of the opening in the plenum to allow for the free flow of return air.
What is return air grill
The ___ is the central component in a forced-air heating system.
What is a furnace
This is the mascot of Texas Christian University (TCU)
What is a Horned Frog