Specifications include, but are not limited to: ➢ The Contractor shall provide a cost for HVAC-R PM’s that occur on a monthly basis for each building listed on bid sheet. The monthly PM’s shall not be any sooner than 20 days after that last monthly PM date. There is no guarantee on the length of time in which PM’s will be awarded to contractor. ➢ The Contractor shall also provide a cost adder for each building to perform two (2) semiannual PM checks in addition to monthly PM’s, one spring PM in March which unit coils are deep cleaned, and unit refrigerant loop is checked for proper temperatures and operation. Non-invasive measures are preferred for this but connecting a gauge manifold to the system may be required if further readings are needed. The second semi-annual PM shall be in October and include a combustion analysis, gas pressure readings, and flame sensor microamp reading. A visual inspection of the heat exchanger shall also be performed, and any potential issues shall be communicated to the HVAC supervisor. The PM shall be documented on County provided forms, unless contractor PM forms are approved by HVAC Supervisor ➢ The Contractor shall supply all filters and belts and other parts and materials to complete the monthly and semi-annual PM’s. This includes coil cleaner, grease, oil etc. ➢ The Contractor shall document and notify HVAC supervisor of any failures of motors or compressors ➢ The Contractor shall notify the HVAC supervisor when a unit is discovered to have a refrigerant leak or low refrigerant change. HVAC Supervisor will advise on how to proceed. ➢ The Contractor will be given access to the building in which the County has contracted the PM work. The County will provide one (1) roof key for access ladders and hatches. This key must be surrendered to the County once contract expires. ➢ The Contractor must split multi-row coils in order to properly clean 2 and 3 row coils ➢ The Preventative Maintenance series below may not always apply depending on time of year such as checking voltage on compressors when it is excessively cold outside, unless it is a heat pump. ➢ The Contractor shall not use any coil cleaner chemical on the microchannel coils. Pressurized water is the only method approved for cleaning microchannel coils. Spring Semi-Annual Preventative Maintenance (PM): ➢ PM to be performed in early March ➢ Replace filters, filters to be replaced twice a year in spring and fall. Contractor shall write date in which filters were replaced on the filters. ➢ Replace belts and inspect pulleys, check pulley alignment, check belt tension, adjust as needed ➢ Clean condenser coil, split coils to clean double and triple row coils ➢ Clean evaporator coil using non-acidic environmentally friendly product ➢ Remove and clean energy recovery wheel-if needed/applicable ➢ Clean condensate drain pan of all debris, vacuum if needed and verify lines are clear of any obstructions. Install drain treatment product ➢ Check unit refrigerant charge, document temperatures/pressure readings and sub cooling/super heat ➢ Verify operation of compressor crankcase heaters ➢ Inspect coils and refrigerant lines for leaks, document any leaks and notify HVAC supervisor ➢ Take voltage and amperage readings of all compressors, condenser fans, supply and return fans - document readings ➢ Check and tighten all electrical connections including disconnects, perform visual inspection of contactors and breakers. ➢ Verify all fans spin freely and are rotating in proper direction, note unusual noises ➢ Inspect refrigerant sight glass, document any moisture or bubbles ➢ Inspect bearings for play