Compressors
The compressors job is.
What is increase vapor pressure?
The main purpose of the condenser.
What is reject heat to the outdoor air?
The main purpose of the evaporator.
The metering device in a mechanical refrigeration system does this.
A ton of refrigerant is equal to.
What is 12,000 Btus per hour?
On a service call, system is not keeping up in heat of the day. You find high head pressure, high subcooling, normal to high suction pressure superheat. What is the problem
What is dirty condenser coil?
A completely sealed compressor that cannot be opened for repair.
What is hermetic?
The first phase refrigerant goes through in the condenser is ___________ before it can condense and change state.
What is de-superheat?
The difference from the RT to the ST of the air handler.
What is delta T?
What is flash gas?
Both liquid and vapor are present.
What is saturated?
On a service call, the complain is not keeping up in the middle of the day but cools fine overnight. You find a frozen evaporator coil when you arrive. What is the problem?
What is a dirty filter?
This compressor uses pistons on a crankshaft to compress gas.
What is a reciprocating compressor?
High and low pressure switches are installing in series with this.
What is the compressor's control circuit?
A popular metal combination used on coils.
What is copper tube, aluminum-fin?
This type of metering device cannot respond to a change in load.
What is a piston?
When the temperature of a liquid refrigerant drops below its condensing temperature, it is this.
What is subcooled?
On a service call, the complaint is not keeping up in the heat of the day, you find low suction pressure, normal to high subcooling and low superheat. What is the problem?
What is dirty evaporator coil?
This compressor has no suction valve, the discharge valve that comes out the top and uses a stationary vane to compress refrigerant.
What is a rotary compressor?
High-pressure, high-temperature ____________, is converted into high-temperature, high-pressure ___________ in the condenser.
what is vapor then liquid?
This happens to the refrigerant in the coil when it absorbs heat.
This type of metering device responds to changes in load.
What is a TXV (thermostatic expansion valve)?
What is superheated?
What is undercharged?