5% seepage if the return air duct is located outside the conditioned space.
10% leakage if the return air duct is located inside the conditioned space.
3% seepage if the return air duct is located outside the conditioned space.
3% seepage if the return air duct is located both inside and outside the conditioned space.
3% leakage if the return air duct is located inside or outside the conditioned space.
When the compressor stops the valve automatically shuts off.
The spring force is counter acted by the evaporator pressure.
The automatic expansion valve maintains constant pressure in the evaporator during compressor operation regardless of the load.
The automatic expansion valve may be used with multiple cooling coils connected to the same compressor.
A spring exerting a downward force on the diaphragm tends to open the automatic expansion valve.
An extremely high vacuum
High absorbent circulation
Very fast refrigerant flow
Very high pressure
Very low temperatures
Shell and tube
Shell and coil
A stop valve
An oil separator
They indicate pressures and corresponding temperatures in a system.
Dials on refrigeration pressure gauges do not indicate saturation temperature.
Permanently installed pressure gauges shall be constructed for at least 1.5 times the design pressure.
Only one pressure gauge is normally installed on a system.
Smaller systems have no provisions for the installation of pressure gauges.
The formation of bubbles in the sight glass.
A low-pressure suction condition.
The formation of frost at the compressor inlet.
A high discharge condition.
A low oil pressure condition.
Is highly toxic.
Is explosive when mixed with air.
Is not an ozone-depleting substance.
Has a strong, pungent odour.
Open the stop valves in the chilled water system.
Check the refrigerant levels.
Open the makeup water valve.
Operate the oil pump for at least ten (10) minutes before starting the compressor.
Open the main circuit breakers.
Pan type humidifier
Power type humidifier
Steam grid humidifier
Wetted element humidifier
The eccentric rotor size
Liquid refrigerant carryover
High pressure refrigerant vapour
The triple bypass flow arrangement.
One in which the cold air enters the coil where the coldest water is flowing.
The half serpentine.
The parallel flow arrangement because it gives better protection against freezing.
The counter flow arrangement because it is more efficient.
A low pressure refrigerant
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