The Center’s absorption refrigeration units, which include seven (5) 137-ton Carrier Absorption Units (16JB010-68), one (1) 137-ton Trane Absorption Unit (ABSC01E), three (3) York YIA-ST-1A2-17-C-S-D-135 ton Unit, one (1) York YIA-ST-2B1-17-C-S-D-235 ton Unit, four (4) Marley Cooling Towers and six (6) Baltimore Air Coil Cooling Towers are to be serviced as follows: All repairs, inspections and preventive maintenance service will be discussed with and approved by the Chief Engineer prior to the Contractor beginning work. Each year, during the month of August, vendor shall inspect and furnish a written report of the efficiency of the absorbers with recommendations for improvements. Each spring, vendor will conduct a start-up inspection which shall include balancing solution and water charge, evacuating machines with auxiliary vacuum pump, addition of lithium bromide, octyl alcohol, inhibitor, hydro bromic acid and/or lithium hydroxide as determined from the solution analysis report. Vendor will also check all safety controls for setting and operation, calibrate all operating controls, and perform running vacuum tests. All absorption machines shall maintain a full charge of lithium bromide and water. The addition or subtraction of lithium bromide to any machines will be required to be approved through the Chief Engineer’s office. Between early spring and late fall (depending on weather), operational inspections and checks of solution chemistry to free conditions will be performed on absorbers. This is to include the inspection of temperature pressures, purge rate, control check out and running vacuum test. These inspections will be scheduled by the Chief Engineer.
