Service • 11
SERVICE
Air Curtain Velocity
Air curtain velocity is affected by stocking levels, coil frost loads, temperature, fan condition, and measurement method. Zero Zone recommends
using an Alnor
®
Velometer Jr.
®
, set to the 0-to-800 fpm range. Air velocity should be measured at the back edge of the discharge air honeycomb;
at the center of the middle door in the case (other doors have slightly lower velocity). A typical RVLC30 velocity reading is 400 to 500 feet per
minute in a fully-packed case, after the case has defrosted and pulled down to operating temperature. Air curtain velocity in a partially-packed
display case is signicantly lower because more air exits the back wall duct holes.
LED Power Supplies
LED power supplies are located in the main electrical box of the RVLC30. The standard location of the electrical box is on the top of the case,
but there is an option to mount the electrical box below the case in a slide-out drawer. See Figure 19 on page 36. This option must be
specied on the original case order.
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