AMENDMENT_0001__Cooling_Units_Questions__Replies___01-23-13.pdf

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NOTE: This equipment will be installed by NRL Shop Services and inspected and start up by the equipment’s manufacturer service department.

Questions and Replies

Wednesday, 01-23-13

Per most recent communication related to Solicitation N00173-13-Q-0084, please provide clarity as to what components are required, it would allow us to accurately quote the request.

1. What cooling type if required, air cooled with condenser, water cooled or chilled water?

Response: 100 F Air Cooled Condenser with Variable Frequency Drive, Locking Disconnect Switch, Internal Surge Suppression, 208/230 VAC – 3 PH – 60 Hz,

2. What capacity is required; air cooled-20 or 35 kW, water cooled-20 or 35 kW or, chilled water-30 or 40 kW?

Response: Nominal 35 KW, 120 kBTU, at 90F, 27% RH Each Unit shall have a Digital scroll, variable capacity compressor utilizing R-410A Refrigerant.

3. What voltage, 208/3 phase or 460/3 phase?

Response: 208 VAC – 3 PH – 60 Hz

4. Is reheat required?

Response: Electric Reheat shall be provided

5. Is steam humidifier required?

Response: Steam Generating Humidifier

6. Is condensate pump required?

Response: Dual-Float Condensate Pump

7. What type of communication card, BACnet ms/tp, BACnet ip, snmp or lon protocol, is required?

Response:

a) IntelliSlot Web Card (IS-WEBL) provides HTTP, SNMP, SMTP and SMS

Communications, quantity 1 per unit

b) IntelliSlot 485 Card (IS-485L) provides Modbus communication, quantity 1 per unit

c) Network Switch for iCOM U2U communication (vNSA8), quantity 1 per order

Precision Cooling Unit –

RFQ # N00173-13-Q-0084

AMENDMENT 0001

HVAC and Electrical Analysis

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8. Is a labor warranty required?

Response: Parts Only Warranty. No Labor.

9. Is a leak detection sensor required?

Response: Point Leak Sensor = Qty (1) per unit

10. Are rack temp sensors required? If so, how many per unit?

Response: Capability of ten (10) for future modification or relocation. A total of eight (8) IT Rack Sensors shall be provided for the two (2) units per this request.

11. Would like the bid to include a 2nd year parts and labor warranty?

Response: Warranty shall include: Three (3) year Total Unit Coverage. 1st Year standard parts only warranty + 2nd through 3rd total unit extended parts only warranty. Also, Three (3) year Compressor Only: 1st standard parts only warranty + 2nd through 3rd compressor only extended warranty. Factory supervised Warranty Inspection/ Start-Up and basic Operator Training.

12. Is a low noise package required in the bid?

Response: Low Sound Package (Compressor Sound Jacket and additional Panel Insulation)

13. Display Response: Large Graphic Display [320 X 240 Dot Matrix] for each unit PLUS (Optional) Wall Mounted Large Graphic Display for Remote “System Viewing” to be mounted in the office of:

Young Chong = Bldg 71 Rm 1401

14. Start Up/Installation by Manufacturer:

Response: The Manufacturer’s Service Department is to provide Network Switch, Network Wiring, and Programming for units to operate in a teamwork mode.

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Basis of Design:

TAG: 10 ton CRV Unit

Quantity (2) Liebert CRV Air-cooled Precision Cooling System

Configuration Number: CR035RA1C7SD1811ED50PB362

Model Number: CR035RA1C7B362

Nominal 35 kW, 120 kBtuh at approximately 90F, 27% RH

208 Voltage, 3 Phase, 60 Hz

Quantity (1) 100F Ambient Liebert Direct-Drive Air-cooled Condenser

Model Number: TCSV90K-Y

Variable Frequency Drive System with Internal Surge Suppression

208/230 Volts 3 Phase 60 Hz

Locking Disconnect Switch

The Liebert CRV is a precision cooling unit located within a row of heat generating IT equipment racks. It is capable of providing all the necessary functions of a precision air conditioner including cooling, humidification, dehumidification, air filtration, and condensate management. Air enters the unit from the hot aisle, is filtered, cooled and conditioned, then expelled into the cold aisle through a supply air baffle.

The Liebert CRV is optimized for maximum cooling capacity in a minimal footprint. The extremely energy efficient components of the system are managed by the Liebert iCOM control system. The control monitors the environment in real-time by locating sensors on the inlet of the racks the unit is cooling. This information allows the unit to optimize its operations for both performance and energy efficiency. All operations and sensor data can be reported remotely via a variety of communication protocols, providing end users with a built-in mini-monitoring system. The supply air baffle allows the air leaving the cooling unit to be directed to the racks the Liebert CRV is conditioning; maximizing its effectiveness, reducing the chance for hot spots, and improving the overall system efficiency.

System Details:

Liebert iCOM control system with Large Graphic Display, 320 x 240 dot matrix

2T temperature sensors to measure air temperature entering server racks - quantity 3

Adjustable supply air baffle system

Variable speed EC plug fans

Digital scroll, variable capacity compressor utilizing R-410A

Crankcase compressor heater

Low Sound Package (Compressor sound jacket and additional panel insulation)

Evaporator Type: tilted slab, copper tubes - aluminum fins with hydrophilic coating

Electric Reheat

Steam Generating Humidifier

Dual-float condensate pump

Rating: MERV 8 per ASHRAE 52.2 (30% efficient by ASHRAE 52.1)

Filter clog detection with alarm

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Locking Disconnect Switch

Top and bottom electrical and piping connections

One remote shutdown terminal

One alarm contact

IntelliSlot Web Card (IS-WEBL) provides HTTP, SNMP, SMTP and SMS communications, quantity 1 per unit

IntelliSlot 485 Card (IS-485L) provides Modbus communication, quantity 1 per unit

Liebert vNSA Network Switch for CRV iCOM U2U communication (vNSA8), quantity 1 per order

LT410 Point Leak Sensor, quantity 1 per unit

Hot air rear return with front cold air discharge

Server rack style rear door

Superior Service Access Panel

Installation casters with leveling feet

Powder coated panels

Unit Color: ZP-7021 Black Gray Matte

Services Include:

3 Year Total Unit Coverage: Liebert 1st year standard parts only warranty + 2nd through 3rd year total unit extended parts only warranty

3 Year Compressor Only: Liebert 1st year standard parts only warranty + 2nd through 3rd year compressor only extended warranty

Factory Supervised Warranty Inspection/ Start-Up and Basic Operator Training (See Notes).

Installation Completion Verification Checklist is available from Liebert Capitol Office Service Department (Phone 1.800.506.1852) and must be completed prior to scheduled start up.

Please fax completed Installation Completion Verification Checklist forms to 1.703.858.4286.

Installer must be present at time of check, test & start up.

Additional unscheduled start up visits due to installation deficiencies or any other circumstances limiting Liebert technician’s to site/installed equipment will require a Purchase Order prior to a return appointment.