Before beginning troubleshooting a technician should know how the equipment is suppose to be functioning: (how it suppose to sound, where it suppose to be cool or hot, when a particular fan it supposed to operating) also
the correct operating pressures for typical system
.
What is meant by the term approach when dealing with an evaporative cooling water?
What is meant by the term approach when dealing with an evaporator chilling water? It is
the difference between the evaporating temperature and the leaving-water temperature
. The more efficient the heat exchange between the evaporating refrigerant and the water, the smaller the approach will be.
What is the first thing a technician should do?
Before beginning troubleshooting a technician should know how the equipment is suppose to be functioning: (how it suppose to sound, where it suppose to be cool or hot, when a particular fan it supposed to operating) also
the correct operating pressures for typical system
.
At what evaporator temperature does an ice maker begin to make ice?
Typically, an ice maker's production rate is only nominally affected when the water temperature rises between
55-degrees to 70-degrees Fahrenheit
. It's when water reaches above 80 degrees that we begin to see a significant drop in ice production.
What is the coil to air temperature relationship for a refrigeration system?
What is the coil temperature compared to the box temperature? It
is typically 20 degrees lower
. For a 134a box at 45 F, the temperature of the coil would be 25 F and the pressure would be 22 psig.
How is a condenser high efficiency obtained?
How is the condenser high efficiency obtain?
By using surface or by using more modern alloys with more extended surfaces or fins
.
How does the outdoor temperature affect the head pressure?
If the outside temperature increases, what happens to the head pressure and system capacity?
The head pressure will increase and the system will not have as much capacity
. … Since there is more refrigerant in the condenser tubes, the evaporator will become starved and the system loses its cooling capacity.
At what humidity do evaporative coolers become ineffective?
According to USA Today, “When the outside temperature soars to 100 degrees (38 C), we're in trouble if the humidity is
much above 25%
.” As temperatures rise, humidity must decline in order to effectively cool your home.
How does a swampy work?
A swamp cooler uses moisture to cool air. A swamp cooler (which is also called an evaporative air conditioner) works by
taking warm outside air through wet evaporative cooler pads
, effectively cooling the air. The cold air is then blown into a home by a blower motor through a vent.
Where is evaporative cooling the most effective?
Evaporative cooling is most effective when
the relative humidity is on the low side
, limiting its popularity to dry climates.
Does hot weather affect ice maker?
During the summer when it's hotter, these temperatures are harder to keep in check.
As the internal temperature of your ice maker goes up, it can cause your ice maker to stop working
. This is simply how ice machines work, which is why it's important to do all you can to keep your automatic ice machine cool.
What is the harvest cycle on an ice machine?
The harvest cycle begins automatically after time maximum freeze time ends. The maximum harvest cycle time is
3.5 minutes for a single evaporator and 7 minutes for multiple evaporators
.
What temperature is ice maker?
Ice machines work best in optimal temperatures of
70-degree air and 50-degree water
. If you plan on installing your automatic ice machine in a hot kitchen, those are tough temperatures to maintain.
What will cause the suction pressure to rise?
What will cause the suction pressure to rise? … Higher than normal pressures indicate the refrigerant is
not transferring its heat into the air passing through evaporator
coil. You need to assess the air flow, are the filter or coil dirty, or is the ducting blocked, fan speed set up correctly.
When would it be beneficial for a technician to pump down a system before servicing?
When would it be beneficial for a technician to pump a system down before servicing?
To check for problems and prevent from having to pump down the entire system
.
Is the best method of checking to see when a refrigerant coil has a proper level of refrigerant?
Define superheat
. is the best method of checking to see when a refrigerant coil has a proper level of refrigerant. Also when the refrigerant vapor is saturated with heat.
