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*PLEASE SEE ATTACHEMENT FOR ADDITIONAL INFORMATION*
The following mechanical portions of this narrative will review the heating, cooling, and ventilation requirements for the proposed maintenance shop facility in Mt. Juliet which is a new ground up construction. This design should be referenced for preliminary equipment sizes, quantities, and areas served.
The work bay area will be served by (2) new 10-ton DX/gas (propane) air handling units on grade ducted up the exterior with proper weatherproof insulation and penetrated in bay area as high as possible. The new low-pressure duct within the space will be located tight to deck within the trusses of the space to maximize the ceiling height. The runouts and diffusers will follow down the slope of the roof before the end of the run is terminated. New externally insulated duct and diffusers will be required above ceilings
To provide proper air turnover rates within the work bay (2) 12’ HVLS fans are to be installed from the structure as high as possible in the roof.
One inline exhaust fan is to be provided for the bulk oil room at 400 cfm to provide 4 ACH. An intake louver is to be installed within the interior door to provide the makeup air of for the room. The termination of the exhaust fan is the go through the roof with a roof cap 10’ away from any mechanical intake. A 2.5-ton vertical heat pump split located in the locker room. New externally insulated duct and diffusers will be required above ceilings The condensing unit is to be located on grade south of the office and conference room. Manufacturer sized refrigerant piping is to be routed in the most direct route to the indoor A/C unit.
A 2.5-ton vertical heat pump split located in the northeast corner of the parts and storage room. The condensing unit is to be located on grade north of the bulk room. New externally insulated duct and diffusers will be required above ceilings. Manufacturer sized refrigerant piping is to be routed in the most direct route to the indoor A/C unit. Condensate is to be routed to the exterior via a condensate pump.
In the Conference room and Office are to be conditioned with Mitsubishi equipment. The Conference room is to be served by one Mitsubishi ceiling cassette with a condensate pump routed to the exterior to be spilled in landscape. The office unit will be the equivalent as the conference room. These units are to be twinned together to a single condensing unit located on grade directly next to the condensing for the other portions of the space.
One inline exhaust fan is to be provided for the bathrooms at XXX cfm to provide the proper ventilation rate per the 2018 IMC. The termination of the exhaust fan is the go through the roof with a roof cap 10’ away from any mechanical intake. The make-up air is to be provided through the 2.5-ton spilt system unit through the outside air.
I. Design Data
For calculation of heating and cooling loads, the following design conditions will be utilized:
Summer: 95°F dry bulb (db) and 78°F wet bulb (wb)
(ASHRAE: 2% cooling db and 2% evaporation wb)
(ASHRAE: Relative Humidity 30-65%)
(ASHRAE: 97% heating db)
II. Building Systems
III. General Systems Specification
A/B. Mechanical and Plumbing – Division 15
c. Propane gas piping will be Schedule 40 black steel. Gas piping at 11 inches water column pressure or less may use screwed fittings. All Gas piping at 2 P.S.I. shall have welded joints.
The winning bidder will be responsible for pulling the necessary permits and scheduling the inspections. The City of Mt.Juliet will cover all permit cost.
Price $ ________________________________________
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