SOW_OTHS-OTHS-27-032-S_DC_Heating_and_Cooling_PM.pdf
PDF 109 KB Posted
- Attached to
- Data Center Heating and Cooling
- Solicitation number
- BPM059482
- Issued by
- Baltimore City, Maryland
About this file
This is a Scope of Work document from the Maryland Department of Human Services, Office of Technology for Human Services (OTHS), for preventive maintenance and emergency field service support of data center power and mechanical cooling infrastructure located at 25 S. Charles St., Baltimore, MD. The solicitation requests comprehensive semi-annual preventive maintenance, routine battery inspection, and 24/7/365 emergency field service with a guaranteed 4-hour on-site arrival service level agreement. The covered equipment includes Liebert EXM 100kVA UPS systems, battery cabinets, Vertiv Geist power distribution units, Liebert CRV precision cooling units, and drycoolers with glycol pump systems.
This procurement is designated as a Small Business Reserve (SBR) set-aside and is restricted exclusively to certified Maryland Small Business Reserve vendors. The solicitation includes Addendum No. 1, indicating revisions or clarifications to the original procurement documents. Bidders must be pre-certified as Maryland SBR vendors to submit proposals for this contract opportunity.
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Text version
DC Heating and Cooling Preventive Maintenance
OTHS/OTHS-27-032-S
Scope of work
1. Facility & Locations Facility: Maryland Department of Human Services (DHS)
Address: 25 S. Charles St., Baltimore, MD 21201
On-Site Locations:
● 12th Floor Server Room (UPS, Batteries, Distribution, PDUs, CRV Cooling Units)
● 8th Floor Parking Garage (Drycoolers & Glycol Pumps)
2. Comprehensive Equipment Inventory The vendor shall provide full preventive maintenance and emergency support for the following equipment inventory:
A. Critical Power Systems (12th Floor Server Room)
● UPS Modules: Two (2) Liebert EXM Single Module UPS Systems (100kVA, 480V Input
/ 208/120V Output, Model: 51SA100EBA01T7Z) featuring IS-UNITY-DP protocol cards.
● Battery Cabinets: Two (2) Liebert EXM Battery Cabinets (Model: 51BPEMCA2L) providing 12-minute runtime, equipped with CSB HRL12200WFR Batteries.
● Maintenance Bypass: Two (2) Maintenance Bypass Matching Cabinets (Model:
51MBE32AA0R1U4W) with 175 Amp breaker trip rating and key interlock (SKRU).
● Distribution Cabinets: Two (2) Distribution Cabinets (Model: 51X100DCHALA0M5) with K20 Output Transformers and SNMP communication.
● Power Distribution Units (PDUs): Fourteen (14) Vertiv Geist PDUs (Model:
NU30020L). Serial Numbers: MA23100810 through MA23100823.
B. Precision Cooling Systems (12th Floor Server Room)
● In-Row Cooling Units: Three (3) Liebert CRV Water/Glycol Precision Cooling Systems
(Nominal 35 kW, Model: CR035RW1A70AED / Configuration:
CR035RW1A7SH1811P0U0P0ADW).
● System Serials: Y23M003028, Y23M003206, Y23M003041.
● Features: iCOM controls with 9" displays, IS-UNITY-DP network cards, variable speed
EC plug fans, steam generating humidifiers, electric reheat, and LT460-Z25 zone leak detection sensors.
C. Heat Rejection Systems (8th Floor Parking Garage)
● Drycoolers: Three (3) Liebert Air-Cooled Drycoolers (Model: DDNT350A, 460V, 3 Phase).
● Glycol Pumps: One (1) Drycooler Dual Glycol Pump Unit (Model: D7.5A, 7.5 HP) featuring a louvered aluminum enclosure, flow switch, and an 8.8-gallon expansion tank.
3. Service Level Requirements
● Preventive Maintenance (PM) Schedule: Two (2) scheduled preventive maintenance visits per system annually. Visits are to be scheduled between 8:00 AM – 5:00 PM, Monday through Friday, excluding State of Maryland holidays.
● Emergency Service Response: Guaranteed 24/7/365 emergency service availability with a maximum 4-hour on-site technician response time.
● Labor, Travel & Support: 100% labor and travel coverage for 24/7 operations, plus access to a 24/7 customer call center/portal for reporting emergencies.
4. Detailed Maintenance Tasks A. Uninterruptible Power Systems (UPS) & Distribution
● Perform a complete visual inspection of equipment and clean internal compartments.
● Check all mechanical connections for tightness and signs of heat discoloration.
● Perform operational checkouts, including transfer tests and verification of proper status/display indications.
● Check alarm circuits and perform calibrations to meet manufacturer specifications.
B. Stationary Battery Systems
● Visually inspect battery jars for cracks, leaks, or corrosion, and verify rack/cabinet integrity and room cleanliness.
● Measure and record total battery float voltage, charging current, cell temperatures, and internal Ohmic values.
● Measure and record overall AC ripple voltage and current.
● Corrective Jar Replacement: Cover parts, labor, and disposal for internal batteries, including the replacement of up to 10% of defective battery jars per 12-month period (provided the overall string is in good health).
● Recycling: Provide battery recycling documentation that strictly meets State of Maryland and EPA requirements.
C. Liebert CRV Precision Cooling Systems (Water/Glycol)
● Inspect and clean evaporator and condenser coils utilizing a non-acidic, organic cleaner.
● Measure operating parameters (temperatures, pressures), check refrigerant levels, and recharge if necessary.
● Test and calibrate all temperature, humidity, and zone leak detection controls.
● Verify the operation of fans/motors, inspect mechanical connections, and clean all drainage systems and traps.
D. Liebert Air-Cooled Drycoolers & Glycol Pumps
● Inspect and clean drycooler condenser coils utilizing a non-acidic, organic cleaner.
● Verify operation of fans and motors, and test controls and safety devices.
● Inspect the dual glycol pump system, flow switches, and the 8.8-gallon expansion tank.
● Measure and record refrigerant/glycol levels and temperatures, and check/tighten mechanical connections.
● Inspect drainage systems for blockages and clean as necessary.
| Scope of work |
| 1. Facility & Locations |
| 2. Comprehensive Equipment Inventory |
| A. Critical Power Systems (12th Floor Server Room) |
| B. Precision Cooling Systems (12th Floor Server Room) |
| C. Heat Rejection Systems (8th Floor Parking Garage) |
| 3. Service Level Requirements |
| 4. Detailed Maintenance Tasks |
| A. Uninterruptible Power Systems (UPS) & Distribution |
| B. Stationary Battery Systems |
| C. Liebert CRV Precision Cooling Systems (Water/Glycol) |
| D. Liebert Air-Cooled Drycoolers & Glycol Pumps |
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