Light in weight
A non-toxic nature
A non-corrosive action on metals
A low boiling point
A fairly low condensing pressure
increase the efficiency of the system
lower the operating temperature of the purger
keep the system cooling while being purged
keep discharge through the coil at the lowest available suction pressure
separate refrigerant vapor from the noncondensable gases to be purged
field servicing is not possible
the compressor and motor are mounted within the same housing
the motor is cooled by the low pressure, low temperature vapor being drawn into the housing
it does not have or require shaft sealing
the compressor is driven by an electric motor
In the compressor suction
In the expansion valve
In the condenser
In the receiver
In the evaporator
The expansion valve
The low side of the system
The heat exchanger
The high side of the system
O2 to pressurize the system
N2 to pressurize the system
refrigerant leak detector to detect leaks
soap test to detect leaks
halide torch flame to detect leaks
thermostatic expansion valve
high pressure float valve
low pressure float valve
automatic expansion valve
hand operated expansion valve
an oil separator
a stop valve
a high pressure safety cut out
a direct acting suction pressure regulator
a solenoid valve
an evaporator pressure regulator
a low pressure safety cut off
Air conditioning systems
They can be used to close flow indicator circuits.
They are operated by the force exerted on a flexible vane immersed in the liquid flowing in the line.
They are used on chilled water.
They can only be used to regulate liquid flow.
They are used as lockout switches when flow is insufficient.
Actuators are required to provide damper movement.
Depending on the damper position the quantity of air passing through the duct varies widely.
Multispeed blowers cannot be used in combination with evaporator dampers.
The dampers decrease the resistance to the passage of air.
When the damper is closed the quantity of air passing over the evaporator coils is at a maximum.
Rotary, reciprocating, and lobe.
Axial, centrifugal, and positive displacement.
Reciprocating, rotary, and centrifugal.
Scroll, rotary, and positive displacement.
Centrifugal, dynamic, and positive displacement.
選擇要在Apple App Store上查看的Topgrade應用程序。