Radar 19.39 Transmitter Heat Exchanger LTA-24.pdf

CHANGE NOTICE: INSERT CHANGED PAGES AND DESTROY SUPERSEDED PAGES

MP NO: 3600-051

ISSUE DATE: NOV 14

CHANGE DATE: MAY 22

MAINTENANCE PROCEDURE

RADAR 19.39 Transmitter Heat Exchanger, LTA-24

MFR: Ellis and Watts

Prepared by:

Launch and Test Range System (LTRS) Integrated Support Contract (LISC)

Maintenance Control Center (MxCC) Patrick AFB, Florida 32925

Under Contract:

FA8806-15-C-0001

Launch and Test Range System Integrated Support Contract Number FA8806-15-C-0001

APPROVED:

Manager, Maintenance Control Center (MxCC)

CHANGE NOTICE: INSERT CHANGED PAGES AND DESTROY SUPERSEDED PAGES

ISSUE DATE: NOV 14

CHANGE DATE: MAY 22

DISTRIBUTION

Location Work Center

DATA REPOSITORY LISC

19.39 Radar (MOTR) R01C

This document is controlled electronically.

Verify document currency before using.

PAGE: 1 of 1

BASIC DATE: NOV 14

CHANGE DATE: MAY 22

LIST OF EFFECTIVE PAGES

PAGES CHANGE DATE

Title Page 1 MAY 21 Distribution 1 List of Effective Pages 1 MAY 21 Schedule for Routines 1 MAY 21 General Maintenance Information 1

Routine No.

PERFORMANCE

1-1 1 AUG 18

1-2 DELETED MAY 21

SERVICE

3-1 1

3-2 1 MAY 22

( ) in margin indicates latest change throughout this procedure.

DATE: MAY 22

SCHEDULE FOR ROUTINES

Routine No. Title

DAILY / AS REQUIRED (03101 / 03100)

1-1 Heat Exchanger Check

MONTHLY (03320)

3-1 Inspection and Cleaning

ANNUALLY (03999)

3-2 Filter Replacement

IMDS WUC REQUIRED TO DOCUMENT PERFORMANCE IS INDICATED IN

PARENTHESIS AFTER SCHEDULING INTERVAL; REFER TO THE IMDS USER

GUIDE.

DATE: MAY 22

GENERAL MAINTENANCE INFORMATION

1. EQUIPMENT DESCRIPTION

The Model LTA-24/1 Heat Exchanger is an electrically powered, air cooled, self-contained liquid to air heat exchanger. The LTA-24/1 system is designed to provide 18,510 W of heat dissipation at maximum coolant supply temperature of 60°C (140°F).

ROUTINE NO: 1-1

PAGE: 1 of 1

DATE: MAY 22

EQUIP: AN/MPS-39 RADAR

HEAT EXCHANGER CHECK

MATERIAL/TEST EQUIPMENT REQUIRED (or equivalent)

Filter F1 P/N: R3F050 FSN: 4330-01-420-5652 Filter F2 P/N: MROX-B FSN: 4610-00-363-5770

NOTE

This check will confirm proper operation of the transmitter water coolant system.

1. Resistivity should be more than 1 Megohm. If not replace the Demineralizer Cartridge (F2).

2. Supply Pressure should be greater than 90 psi. If not check Strainer F3 is clogged. If clear replace the Filter Element F1.

3. Return Temperature should be less than 110°.

4. Supply Temperature should be 2° to 4° less than Return.

5. Total Coolant Flow should be 16 GPM ± 2. If not check Strainer F3 is clogged. If clear replace the Filter Element F1.

6. At the Reservoir Site Glass, coolant level < 3” down.

ROUTINE NO: 3-1

PAGE: 1 of 1

DATE: MAY 22

EQUIP: AN/MPS-39 RADAR

MONTHLY INSPECTION AND CLEANING

Vacuum Cleaner

1. Check air inlet and outlet openings for obstructions. All obstructions to free air flow must be removed in order to maintain proper cooling.

2. Check cooling coil. If coil is dirty, cleaning following manner:

a. Turn off power to the unit.

b. Use a stiff bristled brush and vacuum cleaner to remove large particles of dust and dirt.

c. Spray the cooling coil with water. Remove nozzle from the water hose before spraying the coil.

3. Check for worn or loose fan belts, replace if worn, and tighten if loose.

ROUTINE NO: 3-2

PAGE: 1 of 1

DATE: MAY 22

EQUIP: AN/MPS-39 RADAR

FILTER REPLACEMENT

Filter F1 P/N: R3F050, FSN: 4330-01-420-5652

1. Ensure transmitter is off at load center, following “cool down complete” indicated on transmitter screen, if transmitter was previously on.

2. At the Transmitter heat exchanger, turn off CB1, labeled “Main Circuit

Breaker” behind left-hand front panel.

3. Remove front, left, and right cover panels from unit.

4. Rotate the two large yellow lever-handled ball valves near the input and output of the filter, to off to isolate water flow to/from the filter.

5. Verify strainer F3 is not clogged.

6. Replace the Filter Element F1 (long silver tube housing) per the following instructions:

a. Loosen filter housing clamp.

b. Remove filter housing plug on opposite end of filter housing clamp.

c. Pull out filter housing and filter from unit.

d. Remove old filter and replace with new one while filter housing is vertically oriented. Ensure that filter media is centered and seated completely on closed end of housing, with center tube inserted into hollow center of filter media.

e. Re-install filter housing while ensuring filter remains in position in housing.

f. Install filter housing plug and secure housing clamp.

g. Normalize the valves rotated in STEP 4 to allow coolant flow through the filter.

7. Remove the bleeder valve plug and with a drain bucket ready in hand, rotate the bleeder valve CCW a few turns, capturing any leakage into the bucket.

8. With main radar system power on, turn on CB1 (main breaker on heat exchanger) while capturing bleeder valve output in the bucket and adjusting the bleeder valve output as needed to control the flow. Shut off valve after no air is seen in bleeder valve output and pump cavitation noises cease.

Note:

If heat exchanger pump loud noises (cavitation noises) persists after bleeding the air out, filter media positioning will need to be checked to ensure it’s not blocking the center tube at closed end of housing.

9. Top off heat exchanger reservoir as required with a 50/50 mix of clear ethylene glycol and water to maintain a fluid level on the reservoir sight glass 1 inch below top of glass.

10. Check unit for leaks and resolve as needed.

11. Re-install cover panels.