Valves Flashcards
LAC check valve goes where
LAC and receiver
Function of headmaster
Maintain constant condenser pressure during low ambient conditions
Hot gas bypass regulator are modulating valves that
Close on rise of outlets same a cpr
Reverse acting low pressure control will
Open on rise of pressure
Discharge or hot gas bypass regulator used for capacity control will open when the suction pressure drops below the set point
Yes
CPR is
CRO
Net force that opens the EPR
Inlet pressure minus spring pressure
Net force causing cpr valve to open
Spring pressure minus outlet
A 3 wire hook up on an oil failure control is for
Line voltage
Defrost differential regulator
It reduces the pressure in condenser recover and liquid line header so defrost header is higher pressure than liquid header pressure in defrost
Hot gas bypass regulators used to regulate condenser pressure during low ambient pressure
False
Best reason for including a pump down
Save compressor
If headmaster control loses its charge during low ambient
Low head pressure
Headmaster changes modulates between open and closed according to
Recover pressure
A 4 wire hookup on oil failure is for
Pilot duty
115 and 230 terminals in oil failure do they have separate circuits
False
Best desiccant for removing moisture
Molecular sieve
Hot gas bypass valves are used for
Capacity control
Is OROA the same at headmaster
True
OTD is non adjustable
Yes
Iād head pressure falls
Oil logging n evaporator
Increases condenser efficiency
Lower comp ratio
Lower amp draw
