Heating and cooling loads very with ____________. List three methods that air systems vary to control heating and cooling. Define an HVAC zone. Is a single thermostat typically used to control the temperature in large complex buildings? Define Control. Define Automation. List six properties controlled to maintain HVAC. List four control systems. Define Thermostat. Define Humidistat. Define controllers. Define actuator. Define control valves. What is the purpose of freezestats and firestats? What is perimeter heat? During cold weather operations why would large buildings need both perimeter heat and air conditioning? Where would one be most likely to find a constant-temperature, variable volume with on-off control heating and cooling system? Where would one be most likely to fine a single-zone constant air volume system and why? Where would one prefer to use a single zone reheat system and what is the system draw back? What does the abbreviation VAV stand for? What is multi-zone VAV? How do radiant floor systems work? What makes up a packaged terminal units? List two examples of a packaged terminal air conditioner. Which is more efficient an air cooled heat pump system or a water source heat pump system? Solution 1) Radiation 2) a)connect a humidistat to an electric heater (b)use the waste heat from the refrigeration cycle itself (c) Heat pipe heat exchangers or run-around coils perform a similar function 3) A zone is particularly that area of the building that is continuously subjected to variation in thermal load. 4) Yes 5) In simplest term, the control is defined as the starting, stopping or regulation of heating, ventilating, and air conditioning system. 6) Automation is the automatic centralized control of a building\'s heating, ventilation and air conditioning, lighting and other systems through a building management system or building automation system (BAS). 7) Temperature, Humidity, Ventilation, Pressure, Clean Air, Hazardous Effluent 8) Direct Acting Systems, Electric / Electronic Systems, Pneumatic Systems, Microprocessor Systems 9)Thermostat is a device that automatically regulates temperature, or that activates a device when the temperature reaches a certain point. 10) Humidistat is a machine or device that automatically regulates the humidity of the air in a room or building 11)Controllers are the devices that control the parameters in HVAC. 12) An actuator is a component of machines that is responsible for moving or controlling a mechanism or system. An actuator requires a control signal and source of energy. 13) ontrol valves are valves used to control conditions such as flow, pressure, temperature, and liquid level by fully or partially opening or closing in response to signals received from controllers that compare a \"setpoint\" to a \"process variable\" whose value is provided by sensors that monitor changes in such conditions 14) A freeze stat is a temperature sensing device for HVAC that monitors a heat exchanger to preve.

1. Heating and cooling loads very with ____________.
List three methods that air systems vary to control heating and cooling.
Define an HVAC zone.
Is a single thermostat typically used to control the temperature in large complex buildings?
Define Control.
Define Automation.
List six properties controlled to maintain HVAC.
List four control systems.
Define Thermostat.
Define Humidistat.
Define controllers.
Define actuator.
Define control valves.
What is the purpose of freezestats and firestats?
What is perimeter heat?
During cold weather operations why would large buildings need both perimeter heat and air
conditioning?
Where would one be most likely to find a constant-temperature, variable volume with on-off
control heating and cooling system?
Where would one be most likely to fine a single-zone constant air volume system and why?
Where would one prefer to use a single zone reheat system and what is the system draw back?
What does the abbreviation VAV stand for?
What is multi-zone VAV?
How do radiant floor systems work?
What makes up a packaged terminal units?
List two examples of a packaged terminal air conditioner.
Which is more efficient an air cooled heat pump system or a water source heat pump system?
Solution
1) Radiation
2) a)connect a humidistat to an electric heater (b)use the waste heat from the refrigeration cycle
itself (c) Heat pipe heat exchangers or run-around coils perform a similar function
3) A zone is particularly that area of the building that is continuously subjected to variation in
thermal load.

2. 4) Yes
5) In simplest term, the control is defined as the starting, stopping or regulation of heating,
ventilating,
and air conditioning system.
6) Automation is the automatic centralized control of a building's heating, ventilation and air
conditioning, lighting and other systems through a building management system or building
automation system (BAS).
7) Temperature, Humidity, Ventilation, Pressure, Clean Air, Hazardous Effluent
8) Direct Acting Systems, Electric / Electronic Systems, Pneumatic Systems, Microprocessor
Systems
9)Thermostat is a device that automatically regulates temperature, or that activates a device when
the temperature reaches a certain point.
10) Humidistat is a machine or device that automatically regulates the humidity of the air in a
room or building
11)Controllers are the devices that control the parameters in HVAC.
12) An actuator is a component of machines that is responsible for moving or controlling a
mechanism or system. An actuator requires a control signal and source of energy.
13) ontrol valves are valves used to control conditions such as flow, pressure, temperature, and
liquid level by fully or partially opening or closing in response to signals received from
controllers that compare a "setpoint" to a "process variable" whose value is provided by
sensors that monitor changes in such conditions
14) A freeze stat is a temperature sensing device for HVAC that monitors a heat exchanger to
prevent its coils from freezing.
A firestat operate on the same principal when it senses temperature rise the fan/bower shuts
down and the dampers close.
15) Perimeter heating has the air ducts along the outside rather than down the middle of each
room.
16) VAV stands for Variable Air Volume
17) For a single VAV air handler that serves multiple thermal zones, the flow rate to each zone
must be varied as well.
Air cooled heat pump is more efficient