SECTION   – IMMERSION COOLING TANK WITH CORTEX™ TECHNOLOGY
PART 1 - 	GENERAL
1.1	RELATED DOCUMENTS
A.  	Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.
1.2	REFERENCE STANDARDS
A.	ASME B31.5 - Refrigeration Piping and Heat Transfer Components 2016.
B.	ASTM A123/A123M - Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products 2017.
C.	ASTM A653/A653M - Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process 2018.
D.	ASTM B117 - Standard Practice for Operating Salt Spray (Fog) Apparatus 2018.
E.	ASTM D2794 - Standard Test Method for Resistance of Organic Coatings to the Effects of Rapid Deformation (Impact).
F.	ISO 9001 - Quality management systems -- Requirements 2015.
G.	NEMA MG 1 - Motors and Generators 2017.
H.	ASCE/SEI 7 - Minimum Design Loads and Associated Criteria for Buildings and Other Structures.
I.	Machinery Directive 2006/42/EC for Europe.
J.	Open Computer Project (OCP) Immersion Requirements Rev 2.0 – SR 3.2 (Safety Requirements).
K.	CE Certification – On pumps (for European Economic Area)
L.	Dielectric Cooling Fluid Standards:
1.	ASTM D4052 Specific Gravity.
2.	ASTM D445 Kinematic Velocity.
3.	ASTM D92 Fire Point.
1.3	DEFINITIONS AND TERMINOLOGY
A.	Tank or Immersion Tank or Immersion Cooling Tank: the Tank that contains Rails, Servers, Dielectric Cooling Fluid and the Fluid Control Module, unless noted otherwise (e.g. COMPONENTS, WARRANTY sections).
B.	Immersion Cooling System: the broader system to include piping, External Heat Rejection Equipment, etc.
C.	Rail(s) and/or Bracket(s): Part of Tank for structural support, lifting, electrical grounding and Power Distribution Unit (PDU) support in certain installations.
D.	Dielectric Cooling Fluid: non-electrically conductive fluid that absorbs heat from immersed servers and is contained within the tank.
E.	Cooling Water: Water or Glycol/Water solution that absorbs heat from Fluid Control Module and is circulated to External Heat Rejection Equipment. Certain applications may call this Facility Water System (FWS).
F.	Fluid Control Module (FCM): includes heat exchanger and pumps that circulate Dielectric fluid throughout Immersion Tank and transfers heat to Cooling Water.  
G.	Power Distribution Unit (PDU): component provided by others that sits on rails or bracket(s) outside of Tank that delivers power to Servers and Pumps.
H.	External Heat Rejection Equipment: equipment that rejects heat to the outside air. Examples include but are not limited to – cooling tower, condenser, dry cooler, etc. 
1.4	SUMMARY
A.	Section Includes:
1.	This Section includes factory assembled and tested Immersion Cooling Tanks for pump functionality and leaks. 
B.	Operational Overview (see Components Section for more detail):
There are two (2) liquid circuits:
1.	Circuit 1 – Cooling Water 
a.	Cooling Water enters the heat exchanger.
b.	Heat transfers through heat exchanger within Fluid Control Module from Circuit 2 to Cooling Water, which is then sent to External Heat Rejection Equipment.
c.	Cooled Cooling Water returns to FCM to begin circuit again.
2.	Circuit 2 – Dielectric Cooling Fluid within Tank and FCM
a.	Warm Dielectric Cooling Fluid in Tank is cooled by heat exchanger within FCM, heat is transferred to Cooling Water described in Circuit 1.
b.	Dual Pumps circulate Dielectric Cooling Fluid in Tank to absorb heat from servers in a closed loop circuit.
C.	Failsafe
1.	Each pump is designed for continuous operational flow, with both pumps operating simultaneously during normal operation. In the unlikely event one pump fails, the other can operate the Tank’s Dielectric Cooling Fluid loop at slightly reduced capacity until restoration of the failed pump.

1.5	SUBMITTALS
A.	Product Data: For each type of product indicated include rated capacities, furnished specialties and accessories.
B.	Shop Drawings: Complete set of manufacturer's prints of equipment assemblies, sections, elevations, piping and wiring. Include the following: 
1.	Assembled unit dimensions.
2.	Weight and load distribution.
3.	Sizes and locations of piping and wiring connections.
C.	Material Safety Data Sheet(s) (MSDS) and Technical Data Sheet(s) (TDS) 
1.	Dielectric Cooling Fluid
2.	Rubber Mat
1.6	QUALITY ASSURANCE
A.	Field Verification: The entire unit shall be tested for correct operation, both pumps working, no leaks and for cosmetic finishing. 
1.	See Installation Manual for more details.
B.	Factory Quality Assurance 
1.	No evidence of warping, walls showing no deviation >2mm over 1000mm distance.	 
2.	Corners radiused and edges deburred.	 
3.	Tank shall be tested for 30 minutes with fluid level at least 41 in (1050mm) above the Tank’s bottom with no evidence of leaks.
4.	Pressure testing of FCM.
5.	Testing of both Dielectric Cooling Fluid pumps.

1.7	WARRANTY (Region specific, see Terms and Conditions documentation for more detail) 
A.	Americas Region:
a.	One (1) year warranty after equipment start up, or eighteen (18) months from date of shipment, whichever occurs first. 
B.	All Regions: 
a.	“Defects” due to improper installation (to include incorrect/improper fluid(s)) or handling shall not be considered warranty items.
b.	Approved fluids to be used:
i.	Dielectric Cooling Fluid shall be an approved Fluid (see Dielectric Cooling Fluid section).
ii.	Cooling Water shall be water or a Water/Glycol mix.

PART 2 - 	PRODUCTS
2.1	IMMERSION COOLING TANKS
A.	The Tank is specifically designed for the immersion cooling process and serves as a controlled environment for safely submerging IT hardware and components in Dielectric Cooling Fluid. The Tank's efficient and patented design ensures optimal heat dissipation, maintaining a consistent and ideal operating temperature for the hardware, potentially increasing component lifespan. This immersion cooling system results in a significantly lower PUE than traditional air-cooled systems. This system eliminates fan noise and the need for air filters.
B.	Manufacturers: Subject to compliance with requirements, provide Immersion Cooling Tank manufactured by one of the following:
1.	Baltimore Aircoil Company, Inc. (BAC) 
2.	Approved Equal. Prior approval of full submittal required from engineer of record. 
2.2	RIGGING AND INSTALLATION (see separate Installation, Operation and Maintenance Manual for more detail)
A.	The Immersion Tank, FCM, Rubber Mat and PDU bracket ship together within the Tank, however all parts must be removed from the Tank prior to installation.
1.	The immersion Tank shall be shipped on a pallet that can be off-loaded from a truck and moved by forklift or pallet jack (provided by others).
a.	See COMPONENTS Section for weights.
2.	A Rubber Mat with a footprint of the Tank shall be included to sit between the floor and Tank.
3.	The FCM shall be installed using a mobile gantry crane (provided by others) due to the weight and positioning into the Tank.
B.	A heavy-duty lift (provided by others) is recommended for installing and removing servers, switches, UPS devices and other equipment capable of lifting the maximum weight of FCM, Servers etc. with sufficient safety margin.
C.	Cooling Water Connections
1.	Two (2) 1-1/4 in NPT male threaded connections per Tank.
a.	One Inlet.
b.	One Outlet.
2.	Field Pressure testing shall be done before Server Installation by Licensed Installer/Tester.
3.	Please note: Cooling Water loop design must include sufficient air-bleed/relief to enable efficient bleeding of excess air from the cooling water loop.
D.	Electrical Connections
1.	Two (2) 10A IEC C14 plugs for 240 V single phase connection.
a.	One plug (1) per pump.
2.	One (1) Grounding location on bottom rail.
a.	Grounding wire and connectors provided by others.
E.	Dielectric Cooling Fluid
1.	A fluid transfer pump (provided by others) shall be used to transfer Dielectric Cooling Fluid from its shipping container (e.g. intermediate bulk container, barrel, drum etc.) into the Tank to the appropriate fill level.
2.	Installation is recommended to meet the requirements of Open Computer Project (OCP) 3.3 Liquid Management Guidelines.
F.	General Installation Notes
1.	The Tank shall be installed in a level position.
2.	The Floor supporting the tank shall be capable of supporting the Tank’s weight and any additional loads for which it’s designed (see COMPONENTS section).
3.	It is important to ensure the tank Dielectric Cooling Fluid temperature remains above the ambient dew point temperature in the room in which it is situated. Otherwise, water may be absorbed into the Dielectric Cooling Fluid. This will impact the performance and reduce the fluid’s dielectric properties, exposing the immersed hardware to damage.

2.3	ACCESS
A.	Dimensions and Spacing (see Installation Manual for more details)
1.	Each Tank shall be 58.3 in (1480mm) L x 25.9 in (700mm) H x 47.2 in (1200mm) D with a minimum 39.4 in (1000mm) space between each row. 
2.	Water and power can be run along the sides of the Tank so no raised flooring is required, and the units can sit on the slab on top included nitrile rubber mat.

2.4	COMPONENTS 
A.	Tank, Rail(s) and Bracket(s)
1.	Tank shall have maximum server size capacity of 26 Rack Unit (RU), 19 in (483mm) W and 33.5 in (850mm) D. 
2.	Tank shall have 30kW of server cooling capacity with a .24 gal/s (.9 L/s) cooled water loop at 85.1 F (29.5 C).
3.	Tank Dielectric Cooling Fluid capacity shall be maximum 198 gallons (750L).
4.	Tank dry weight (without FCM, fluid, equipment etc.) shall be 265 lbs. (120 kg).
5.	Full weight including Tank, FCM and fluid (without servers, PDU etc.) shall be approximately 1725 lbs. (782 kg).
6.	Optional PDU Bracket shall support a PDU up to 7.5 in (190 mm) W and 55.1 in (1400mm) L, 300 lbs. (136 kg) when used as single, 600 lbs. (272 kg) when shared by two (2) Tanks.
7.	Shall be properly grounded to bottom rail of Tank by licensed electrician (see Installation Manual for more detail). 
8.	Tank shall be a high-grade galvanized sheet steel, welded at the seams and leak free.
9.	Rail(s) and Bracket(s) shall be a high-grade mild steel to structurally support Tank and accessory(ies).
10.	Tank, Rail(s) and Bracket(s) shall be coated in a multi-stage electrostatic thermosetting finishing process that results in an attractive, non-reactive finish that’s extremely durable.
a.	The appearance shall be an Agate Grey color (RAL 7038).

B.	Fluid Control Module (FCM)
1.	FCM Casing shall be aluminum.     
2.	Each FCM includes the Heat Exchanger and two (2) Dielectric Cooling Fluid Pumps.
a.	Weight of FCM only is approximately 80 lbs. (36 kg) dry, 100 lbs. (45 kg) wet.
b.	Heat Exchanger:
i.	Shall have 145 psi (1000 kPa) maximum operating pressure at Cooling Water circuit.
ii.	Tubing, header and connector shall be constructed of copper.
iii.	Fins shall be constructed of Aluminum.  
c.	Dielectric Cooling Fluid Pumps: 
i.	FCM shall have two (2) factory-wired submersible fluid pumps rated for continuous duty.
ii.	Pumps shall be CE certified.
iii.	Each pump shall require 1.1 amp per C14 plug.
iv.	Each pump shall operate on single phase 240V, 50/60 Hz AC power.
v.	Body shall be constructed of a pearlitic gray cast iron.
vi.	Impeller shall be made of a high strength polymer.

C.	Dielectric Cooling Fluid
1.	The Dielectric Cooling Fluid shall be SpectraSyn™ MaX 3.5, or CompuZol™ IM2015 or suitable equivalent.
a.	SpectraSyn is a trademark of ExxonMobil.
b.	CompuZol is a trademark of The Lubrizol Corporation.

D.	Cooling Water (provided by others)
1.	Cooling Water that transfers heat from the Dielectric Cooling Fluid in Tank, with Heat Exchanger in FCM, to be pumped by outboard Cooling Water Pump to External Heat Rejection Equipment. (See Operation Section for more details)
a.	The Cooling Water shall have an appropriate mixture of Glycol and Water to prevent freezing and/or corrosion, dependent on the installation.
b.	The Cooling Water shall operate in a cooled water loop, with the maximum Dielectric Cooling Fluid temperature not to exceed 122°F (50°C).
c.	The temperature delta for the Cooling Water after external heat rejection between the outlet and inlet shall be the minimum of 7°F (4°C).
E.	Cooling Water Pump (provided by others)
1.	Shall flow at least .24 gal/s (0.9 L/s).
2.	Shall have appropriate back up power and redundancy for continuous operation.
3.	Recommended to be installed/connected by licensed plumber.
F.	Power Distribution Unit (PDU) (provided by others)
1.	Shall provide adequate power to connected servers and Dielectric Cooling Fluid pumps.
2.	Shall be installed by licensed electrician according to local and national electrical codes, including proper extension cable(s), grounding and redundancy.
3.	The included Tank PDU bracket shall be capable of supporting PDU up to 7.5 in (190 mm) W and 55.1 in (1400mm) L 300 lbs. (136 kg) when used as single, 600 lbs. (272 Kg) when shared by two (2) Tanks.
See Installation Manual for spacing and layout recommendations.

2.5	ACCESSORIES
A.	Tank Lid (Optional)
1.	Each Tank features an optional lid (like a cap) which shall be made of mild steel matching the color appearance of the Tank to prevent dust ingress. Lid shall further be protected by a thermosetting hybrid polymer.
2.	This lid shall be light enough (approximately 20 lbs. (9 kg) to be easily removed by one person.
3.	The lid shall not interfere with PDU and cable routing locations.
B.	Nitrile Rubber Mat (included)
1.	Shall have dimensions of ~1/8 in (4mm) thick x 55.1 in (1400mm) L x 20.0 in (508mm) W.
2.	Shall be placed on floor to support entire footprint of a single Tank.
C.	PDU Bracket (included)
1.	The Tank PDU bracket shall be capable of supporting to 7.5 in (190 mm) W and 55.1 in (1400mm) L, 300 lbs. (136 kg) when used as single or 600 lbs. (272 kg) when shared by two (2) Tanks.
2.	PDU Bracket shall include appropriate fasteners (nuts, bolts, washers) to attach to rail(s).
D.	Blanking Panel (Provided by Others)
1.	If there are empty server spaces remaining in the Tank, it’s recommended to install blanking panels in the empty spaces. This is to optimize current flow and heat transfer.

END OF SECTION