Vendor Questions.pdf

PDF 2 MB Posted Sep 1, 2026

Attached to: Cooling Tower
Solicitation number: 36C26026Q0965
Issued by: Department of Veterans Affairs Veterans Health Administration Veterans Integrated Service Network 20

About this file

Written by GovTribe AI · Sep 1, 2026

This is a Questions and Answers document addressing site-specific requirements and technical specifications for a cooling tower procurement at VA Portland Health Care System (VAPORHCS), a U.S. Department of Veterans Affairs facility located in Portland, Oregon.

The facility requires replacement or new installation of a cooling tower unit on the northwest side of Building T-51. The existing system is an Evapco LSWA2002 evaporative cooling tower operating as a closed-loop forced-draft unit with a confirmed capacity of 50 tons; the building's calculated cooling need is 46 tons. The new unit must be compatible with existing infrastructure: water supply operates at approximately 80 psi city water pressure with seasonal volume variations, and electrical power is 3-phase/480V/60Hz with existing breakers of 20 amps for the pump and 8 amps for the fan. The facility does not currently have a pump station as part of the requirement, nor does it require safety features such as ladders or catwalks. Chilled water parameters (GPM, inlet temperature, and outlet temperature) vary seasonally and have not been precisely metered on either the evaporative water supply or cooling loop. The new unit must integrate with a Bacnet connection point within the building; the current system is not Bacnet-connected. No military standards (MIL-STD) apply to this procurement. Site plans and a nameplate photograph of the existing unit are provided for reference, with the cooling tower location clearly marked on facility site plans and building first-floor plans.

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36C26026Q0965 0001.pdf	PDF	Sep 1, 2026
36C26026Q0965.pdf	PDF	Aug 21, 2026

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Questions

1. Chilled water pressure and volume compatible with existing supply capacity

a. Can you send me the existing supply pressure and volume

i. We don’t meter the current unit; supply pressure for evaporative water is at city water pressure – approx. 80psi. Volume varies seasonally.

ii. We also don’t have a meter on the cooling loop for volume or pressure.

2. Electrical connection points to existing

a. Where are the electrical points located relative to the unit?

b. See photo.

3. Electrical sized to existing supply capacity

a. What is the existing voltage, MCA, and MOCP?

b. Can you confirm voltage is 220V/50Hz? Usually voltage is 60 Hz

i. The existing unit is 3phase/480V/60Hz.

1. There is a 20 amp breaker for the pump and 8 amp for the fan

4. Interoperability/connectivity with existing systems already in place

a. What is the existing system?

i. Existing system is an evaporative cooling tower and cooling water to heat exchangers in the building

b. Is this an open loop or closed loop Cooling tower?

i. Closed loop cooling water

c. Is this forced draft or induced draft?

i. Forced draft

d. What are the ambient air conditions? Where will this be located so I can check the ASHRAE data.

i. The unit is located outdoor so ambient air varies based on season.

e. Can you provide me with a copy of MIL-STDs? I’m not familiar with this.

i. We do not have a MIL-STD.

f. Is this Bacnet MSTP or IP?

i. The current system is not connected to Bacnet. There is a connection point in the building where we would like to connect the new unit to Bacnet.

g. Do you require any safety features such as ladders, catwalks,

i. Negative.

h. What is the manufacturer and model number of the existing unit?

i. Evapco LSWA2002; see nameplate and ii.

5. Generally, we need three of the four to size a cooling tower:

a. GPM

i. varies by season

b. Temp in

i. Varies by season

c. Temp out

i. Varies by season

d. Btu/hr or kW or Tons = 50 tons

i. The existing unit is confirmed at 50 ton. The need for the building based on volume and usage has been calculated at 46 ton.

6. Also required:

a. Location XXX

i. Northwest side of building T-51. See plan and google satellite view:

b. Voltage.

i. See above.

c. Do you need a pump station?

i. No. The pump is not part of the requirement.

T51

NO PARKING

SW 6TH AVENUE

SW CAMPUS DRIVE

CAMPUS DRIVE

Trailer

LOT 4

LOT 1

LOT 5

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ONLY

STOP

ONLY

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P AHE

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AHEAD

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'B'

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FIR

E LA

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HAZARDOUS

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AREA

RADIA

TIO

N S

TORAGE

SHUTTLE B

US P

ARKIN

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LOT 9

SW US VETERANS HOSPITAL ROAD

SW GAIN

ES STREET

S V

ETERA

N S H

SPITA

L RO

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LOT 5

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S T

STOP

POLICE

LOT 1

6TH AVENUE

OREGON

HEALTH

& SCIENCE

UNIVERSITY

Boundary Line

DATEREVISIONS

VA Portland Health Care System

(VAPORHCS)

U.S. Department of Veterans Affairs PORTLAND, OR

N/A

PORTLAND SITE PLAN PORTLAND SITE PLAN

FMS MBC

10/27/25

N/A

CS-1

1 1

FMS

SCALE: NO SCALE

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ENG. SHOP TRUCK

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VHAPORDonneJ1 Callout Location of Cooling Tower

DATEREVISIONS

VA Portland Health Care System

(VAPORHCS)

U.S. Department of Veterans Affairs PORTLAND, OR

T-51

BUILDING T-51 - 1st FLOOR PLAN T-51

FMS MBC

10/27/25

T51-1 1 1

SCALE: 1/8" = 1'-0"

12,251 GSF

1st Floor

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(E) CONCRETE PAD & CHAIN LINK FENCE @ (E) COOLING TOWER

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(E) COOLING TOWER

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(E) COOLING TOWER ELECTRICAL SUPPLY

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T-51 1ST FLOOR PLAN

Portland Site Plan.pdf

Sheets and Views

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File details come from the government source that posted it. Updated Sep 1, 2026.