Type II — High-PressureQuestion 158 of 240
A technician recovers refrigerant from a heat pump in heating mode and is unsure which service port to use. On a heat pump, why must the technician understand the reversing valve position when recovering or charging?
a.The reversing valve changes the refrigerant into a different chemical
b.The reversing valve swaps which coil is the condenser and which is the evaporator, changing high and low sides
c.Heat pumps cannot be recovered while installed
d.The reversing valve makes recovery illegal
Explanation
A heat pump's reversing valve switches the roles of the indoor and outdoor coils between heating and cooling, so which line is the high side and which is the low side changes with the mode. Understanding this ensures the technician connects to the correct ports and interprets pressures correctly. The valve does not change the refrigerant itself or prohibit recovery.
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