REFRIGERATOR COMPONENT (INCLUDING ELECTRICAL) TEST AND ADJUST

TM 10-4110-262-13&P

0029 00

DIRECT SUPPORT MAINTENANCE

ADVANCED DESIGN REFRIGERATOR, 300 CUBIC FOOT (ADR-300)

4110-01-465-4158 / 4110-01-465-4564

REFRIGERATOR COMPONENT (INCLUDING ELECTRICAL)

TEST AND ADJUST

INITIAL SETUP

References

Tools and special tools

Equipment Description and Data (WP 0002 00)

Tool Kit, Refrigeration Service

Refrigeration Unit Service (WP 0031 00)

(WP 0051 00, Table 2, Item 5)

Compressor Remove/Install (WP 0033 00)

Multimeter (WP 0051 00, Table 2, Item 2)

Electrical Enclosure Contactors

Materials and Parts

Remove/ Install (WP 0035 00)

Refrigerant, R404A (WP 0068 00, Item 16)

Defrost Termination Switch Removal and

Personnel Required

Replacement (WP 0043 00)

HVAC Technician (MOS 52C, AFSC 3E1x1) (1)

Equipment Conditions

ADR-300 set up and connected to a power

source (See WP 0005 00 for set-up

procedures).

TEST

NOTE

The following procedures involve servicing the refrigeration system. Some of

these service procedures are regulated by Federal, and in some cases, by State

and Local laws. All regulated refrigeration service procedures must be

performed by an EPA certified technician, using approved equipment and

complying with all Federal, State, and Local laws.

Checking the Refrigerant Charge

If the unit has an insufficient charge of refrigerant, the evaporator will be "starved" and the box temperature will rise

even though the unit is operating. Also, an insufficient charge does not circulate enough oil to properly lubricate the

compressor. Determine the charge by inspecting the liquid line sight glass with one of the following conditions

established:

NOTE

The above conditions must be established each time the refrigerant level is

checked or if refrigerant needs to be added for any reason.

Testing the Refrigerant Charge with an Empty IC

1. Install a manifold gauge assembly set.

2. Run the unit in cool until the thermometer reads 32 F (0 C).

3. The discharge or head pressure gauge should be at least 270 psi (1862 kPa).

4. If the pressure is below this, it can be raised by covering a portion of the condenser air inlet with a

piece of cardboard.

0029 00-1