Multiplex Systems Flashcards
What is a condenser holdback valve for multiplex system discharge pressure regulating?
ORI
Valve used for head pressure control that bypasses hot gas to the high side receiver in a multiplex system ?
ORD
Why is condenser flooding an important operating requirement in low outdoor ambient conditions?
- It increases the condensers capacity to reject heat
- It decreases the condensers ability to reject heat
Where is a holdback valve for condensing pressure control installed on a multiplex system?
Condensate line
What is the most common method of defrosting evaporators on supermarket multiplex refrigeration systems?
Reverse flow hot gas defrost
What is the purpose of running a Satellite compressor or a dedicated Independent compressor on a multiplex refrigeration system?
Runs a small portion of the load at the lowest SST
Why is a Defrost Differential Pressure Regulator between the Receiver and Liquid Header?
To create a difference in pressure between the defrost header and the liquid line
If you increase the spring tension on one EPR on a multiplex system, what changes?
Evaporator pressure increases
What would cause the actuator to terminate split operation and return the summer condenser to operation?
OA and discharge pressure rising above a set point
