6_N4008423R8702_PWS_Amd.pdf

CUI//FEDCON SRN22018438 eProject No. 1755043

CUI//FEDCON

SRN22018438 eProject No. 1755043 Amendment

MAINTENANCE AND INSPECTION OF

HVAC SYSTEMS, HANGARS, ABOVEGROUND STORAGE TANKS AND

UNDERGROUND STORAGE TANKS

FOR THE

U.S. NAVAL AIR FACILITY, ATSUGI

SPECIFICATION AND DRAWINGS PREPARED BY:

NAVFAC FAR EAST, PUBLIC WORKS DEPARTMENT ATSUGI

FACILITIES ENGINEERING & ACQUISITION DIVISION

1) Revise the following pages as attached:

• Section C-150200 3.4.1 page 21

• Section J-1502000-05 Part 4 page 3 and 4

• Section J-1502000-06 page 5

APPROVED BY:

Project FSC Engineer:

M.KOJIMA

Manager:

A. MORGAN

Date 8/23/2023 Date 8/23/2023

Section C-1502000 Page 21

1502000 – Facility Investment Spec Item Title Performance

Objective Related Information Performance

Standard May and shutdown during the months of October; however, the length of the season will vary and no adjustment in the contract price shall be made regardless of the actual length of the season. The KO will advise the Contractor of the specific date or dates when such services should begin to be accomplished.

The pre-cooling season work, start-up work and shutdown work shall include but not limited to;

- turning on or off the equipment

- adjusting valves per season

- securing system for next season and for next mode (cooling to heating, or heating to cooling)

- resetting all thermostats

- monitoring and confirming system full functions in accordance with the manufacturer’s instructions

Chemical cleaning on chiller and cooling tower shall be performed every four years, or as needed annually. Overhaul of pumps shall be performed by the Contractor as a part of seasonal start-up work at no additional cost to the Government.

The chiller and cooling tower inventory is provided in J-1502000-06.

After the completion of each start-up or shutdown work, the Contractor shall submit a start-up/shutdown work report, Deficiency Status Reports, and others as required per Section F.

The HVAC systems inventory

A dd Language by A

M

J-1502000-05 Part 4 Page 3

CUI//FEDCON

4.4 Inspect operation of lithium bromide solution control valve. Check the solution circulation quantity.

4.5 Perform necessary adjustment for each inspection.

5. Electrical System Inspection and Adjustment

5.1 Inspect pump, motor, and related equipment. Conduct insulation resistance test for control circuit.

5.2 Inspect control panel.

5.3 Perform necessary adjustment for each inspection.

6. Steam System Inspection and Adjustment

6.1 Inspect for steam leakage on steam piping system.

6.2 Inspect steam pressure.

6.3 Inspect operation of steam valve.

6.4 Inspect steam trap.

6.5 Perform necessary adjustment for each inspection.

7. Water Piping System Inspection and Adjustment

7.1 Inspect for water leakage on chilled water/hot water piping, cooling water piping, supply water piping.

7.2 Measure flow rate of chilled water, hot water, and cooling water. Calculate pressure loss.

7.3 Perform necessary adjustment for each inspection and measurement.

8. Temperature Measurement and Adjustment

8.1 Measure exit temperature of chilled water and hot water.

8.2 Measure exit temperature of cooling water.

8.3 Measure temperature at evaporator.

8.4 Measure temperature at high-temperature regenerator.

8.5 Measure temperature at condenser.

8.6 Perform necessary adjustment for each measurement.

9. Test-Run and Adjustment

9.1 Regenerate refrigerant and adjust lithium bromide solution concentration.

9.2 Measure lithium bromide solution at inhibitor.

9.3 Test-run the chiller. Collect operational data.

9.4 Perform necessary adjustment to ensure proper operation, to minimize breakdowns, and to maximize useful life. Other accessories including but not limited to scale prevention device shall be made ready for use.

10. Report: Submit “Pre Cooling Season Work” report. (Report on chiller shall be prepared by each chiller manufacturer.)

Additional Work:

The Contractor shall perform the following additional work as a part of pre cooling season work in the specified period, in accordance with the manufacturer’s recommendations, or as needed annually:

Bldg. 3125: Every four years, or as needed annually.

Bldg. 3050: Every four years, or as needed annually.

Bldg. 3069: Every four years, or as needed annually.

Bldg. 3102: Every four years, or as needed annually.

(2) Cooling Tower

C hange by A

J-1502000-05 Part 4 Page 4

CUI//FEDCON

If justified and approved, following works may be performed at “Cooling Season Start Up Work,” instead of performing at “Pre Cooling Season Work.”

1. Clean water basin, strainer, and soundproof mat.

2. Inspect for any parts coming off or missing. If any, install new parts. If the coming-off part is still durable, clean and reinstall it (after lubricate it as applicable.)

3. Inspect ball tap for operation.

4. Inspect each part and operation of water spraying (sprinkler) equipment.

5. Inspect operation of blow-down system. Analyze blow-down quantity and perform blow-down for cooling towers that are not equipped with blow-down system.

6. Inspect cooling water piping for condition and air injection.

7. Inspect cooling tower operating temperature.

8. Inspect operation of fan blade.

9. Inspect fan’s rivets and shaft.

10. Inspect fan belt.

11. Inspect and lubricate motor, gear box, and drive shaft. Measure fan motor’s current, insulation resistance, and overcurrent-relay’s set current.

12. Perform necessary adjustment to ensure proper operation, to minimize breakdowns, and to maximize useful life.

13. Submit “Pre Cooling Season Work”.

Additional Work:

The Contractor shall perform the following additional work as a part of pre cooling season work in the specified period, in accordance with the manufacturer’s recommendations, or as needed annually;

Bldg. 3125: Every four years, or as needed annually.

Bldg. 3050: Every four years, or as needed annually.

Bldg. 3069: Every four years, or as needed annually.

Bldg. 3102: Every four years, or as needed annually.

(3) Cooling (Condenser) Water Pump/Chilled and Hot Water Pump/Condensation Pump

If justified and approved, following works may be performed at “Cooling Season Start Up Work,” instead of performing at “Pre Cooling Season Work.”

1. Inspect ground packing or mechanical seal. Check for water leakage.

2. Inspect coupling for abnormal noise, excess vibration, and check and adjust for misalignment.

3. Inspect bearing for abnormal noise, excess vibration, and temperature.

4. Inspect and measure motor’s insulation resistance.

5. Perform necessary adjustment to ensure proper operation, to minimize breakdowns, and to maximize useful life.

6. Submit “Pre Cooling Season Work Report”.

(4) Fan Coil Unit

C hange by A

Location BLDG EQ Description Quant Additional Information Manufacturer Model Serial Number Date of manufacture Description Notes

CHILLER UNIT 1 MECH.ROOM MITSUBISHI CR-60N AX1649JA1U1 1994-08 S&T (S) 2.1M

COOLING TOWER 1 ROOF KUKEN SKV-60F 4HV-263 1994-07 Hatch roof access

CHILLER UNIT 1 MECH. ROOM EAST DAIKIN UWP750A A000331 2017-07 S&T

COOLING TOWER 1 ROOF MITSUBISHI HT-20SQb D1206108 2012-06 Hatch roof access

Location BLDG EQ Description Quant Additional Information Manufacturer Model Serial Number Date of manufacture Description Notes

CHILLER UNIT 1 MECH.ROOM DAIKIN UWD3550D5C 5550002 2006-01 S&T (W)

COOLING TOWER 1 ROOF EBARA SHINWA SBC-100ES SG067035 2006-03

CHILLER UNIT 1 MECH.ROOM TOSHIBA CARRIER RUW-J13201 2202W61730 2002-05 S&T (S)

COOLING TOWER 1 ROOF EBARA SHINWA SBC-40ES SC060196 2002-06 Hatch roof access

Note 1 : Bldg. 3050, 3069, 3102, 3125 are included in the HVAC maintenance.

Note 2 : The chemical cleaning of coil, chiller unit, and cooling tower shall be performed every four years, or as needed annually.

Part 3. NGIS Fund:

Part 3. DoDEA Fund:

Add language by AM

J-1502000-06 Page 5