Auxiliary Systems Flashcards
What type of valve is used to direct hot gas from the condenser to the reclaim coil?
a three way heat reclaim valve
What is the media that is heated by a heat reclaim system?
A. air
B. water
Why is a heat reclaim system so important?
it allows heat to be recaptured from the refrigerant stream and reused.
What is the function of a timer release solenoid?
terminate the defrost cycle
What component energizes the electric defrost heater on a 24-hour defrost timer?
a normally open set of contactors
On an electric defrost system what device initiates the de-energizing of the heater if the evaporator temp rises above freezing before the timed defrost
cycle ends?
termination thermostat
What would the best method of defrost be for a fixture that has a case temperature below freezing and is operated by a single condensing unit located in a low ambient condition?
electric defrost
What is the BTU output of an electric defrost heater that is rated at 1200 watts?
4096 BTU’s
What would the best method of defrost be for a fixture that had an evaporator temperature below freezing but a case temperature above freezing?
off cycle air defrost
On a supermarket rack employing hot gas defrost where would the hot gas solenoid valve be installed?
between the discharge line and the oil separator
