The vendor shall supply all labor, materials, equipment, and insurance necessary to perform maintenance and repair services of Tecogen Chillers. The following is not intended to describe in full work required, but is a supplement for clarification and/or noting any other billable work that may have to be performed during the contract term. Scope of maintenance includes any and all preventive maintenance required, inspections, and repairs required to keep the chillers operating with optimum efficiency. The term chiller includes gas-fired engines and all components within packaged Tecogen Chillers. This contract also includes all necessary parts and labor required for the scheduled and unscheduled maintenance and repairs or replacements of the part(s) or component(s) of chillers. To maintain the chillers in optimal efficiency, it will be required to clean condenser and heat exchanger bundles once a year at the end of the cooling season. Evaporator tube bundles shall be cleaned once per service contract term, coincident with the condenser tubes. All parts and labor necessary to perform the described service are covered under this contract. Any external components not part of the chiller, such as external HVAC piping and controls, shall not be the responsibility of the contractor and not covered under this contract. However, sensors mounted in the catalytic converters are included. Any firmware upgrades in the machine controllers and maintenance of the communications to the building automation system are included. A. SPECIFICS OF THE CHILLERS; 1. The Chillers are Natural Gas-fired engine driven screw machines; model # 400X. 2. Each chiller is capable of producing 400-tons cooling effects. 3. Chillers utilize R-134A refrigerants. 4. Each chiller has two separately operable natural gas-fired engines. 5. The Chiller Plant is in operation since installed new in 2003 and since maintained by the original equipment manufacturer.
