Figure 6.20 Container Leakage Test Ports; Figure 6.21 Magnehelic Gauge - Carrier XtendFRESH Operation, Service And Parts Manual

Container refrigeration. controlled atmosphere option

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Operator's manual (2 pages)

Table Of Contents

Table of Contents

* If ports are not available on Unit

then replace Manual Fresh Air

panel disc with a disc that has

pressure decay ports.

(PN: 79-04098-00)

One of the ports is connected to a pressurized air supply and the other is connected to a Magnehelic pressure

gauge. The pressure gauge monitors the container leakage rate.

Prior to performing the leak test:

•

Seal the floor drains with plugs

•

Ensure the unit condensate drain line is filled with water

•

Ensure the air makeup panel is tightly closed

•

Insert plug in drain hose. Install container curtain at the rear door

•

Seal the door shut

When installing the door curtain (part number 76-50036-01), place the curtain around the door and seal the curtain

along the top and sides of the box and close the door. The curtain should be visible throughout the perimeter of the

doors. Tape may be used to assist in holding the curtain in position. Always use a new curtain as a small rip in the cur-

tain can result in a failure of the test.

After connecting the gauges, turn on the air supply and regulate the air pressure to 40-60 psi. When the Magnehelic

gauge reads 2.5 inches of water gauge, shut off the air supply. Do not exceed 3.0 inches of WG.

Monitor the Magnehelic pressure gauge for the drop in air pressure in the container. When the Magnehelic pressure

gauge reads 2 inches, start a timer. When the Magnehelic pressure gauge reads 1 inch of WG, stop timing. The

amount of time expired should be no less than eight minutes or more for a 40 foot container and four minutes or more

for a 20 foot container. If it is less than the required time (i.e six minutes), then the container needs to be checked for

leaks.

Check Container

for Leaks

T-366