Proposed Mechanical
« General
The bidding contractor shall put in writing and issue with the bid proposal any assumptions or
exemptions above and beyond those outlined in the RFP pertaining to the project.
As this is a design build project the information provided in this narrative and attached
specifications are supplied to aide the contractors in bidding the project and is not the only way the
project can be completed. The contractor is allowed to propose alternate equipment or
configurations in their proposal but must provide a description if what is priced differs from the
possible solution outlined in the narrative to allow for review before acceptance of submitted bids.
% Heating, Cooling, and Ventilation Systems
The existing air handlers HVAC-1 and HVAC-2 shall be broken down and completely refurbished
including replacement of the fan motor with new premium high efficiency motor, all fan belts and
pulleys, filters and filter racks, heating coils, DX coils, fan shafts, fan housings and all spring
isolators. The interior of both air handlers shall be cleaned and the airflow rebalanced to meet the
airflows specified on the as-built documents. Refurbishment shall include manufacturer inspection
and start up.
The existing exterior condensing units (ACCU-1 & ACCU-2), their associated DX coils (see attached
selections from manufacturer), and piping shall be replaced with new units utilizing R-410A as the
refrigerant. ACCU-1 shall be replaced with a new condensing unit and provided with a new
disconnect, power and controls {refer to Daikin Applied equipment selections). ACCU-2 shall be
replaced with a new condensing unit and provided with a new disconnect, power and controls
(refer to Daikin Applied equipment selections). Both new ACCU’s shall be 208 Volt, 3 Phase, 60 Hz,
refer to attached selections from manufacturer. A new DX coil is to be provided in each unit. All
piping is to be insulated as per specifications.
The contact information for the Daikin Applied representative at HTS who is familiar in the project
is as follows:
Derek Anneser
(603)702-3432
derek.anneser@hts.com
No piping shall be reused as the current piping and joints are not compatible with the new
refrigerant. The new piping shall be brazed and in order to install the piping in the existing
horizontal PVC conduit will require excavation and replacement of the joint with a long sweep
elbow. In case there is a deficiency found in the PVC conduit provide a unit price per linear foot for
running the refrigerant line along the exterior wall and above the ceiling down to the new DX coil.
The size and configuration of the piping system shall be as per recommendation of equipment
manufacturer. Piping shall be manufacturer provided insulated linesets.
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66 Jackson St, Littleton, NH 03564 | 40 So. River Rd #35, Bedford, NH 03110 | Ph: 603.444.6578 | www.yeatonassociates.com
