Electrical Systems
The existing electrical service is 2000 ampere, 277/480V, three phase, four wire main service
that terminates in an (3) section Main Switchboard located in the basement. The switchboard is
a GE Spectra Series and appears to have available physical space for additional of any required
circuit breakers as part of the HVAC upgrade.
The service is fed from a utility pad mounted transformer located at the rear of the building.
Adjacent to the pad mounted transformer is exterior mounted electrical gear and a 250KW
diesel generator. The generator is rated at 376Amps @ 480V, 3P.
The data provide by Eversource notes the existing demand on the facility is approximately
242KW and an equivalent to 291Amps @ 480V, 3P.
Panelboards are installed throughout the facility in various mechanical and utility rooms with
step down transformers. These panelboards may be utilized for the HVAC renovation project
with further review if future space is available. The panels appear to be in good shape and
labeled with directory cards.
The existing addressable fire alarm system is manufactured by FCI (S3 Series). Additional
required equipment and/or Modifications may be supported by the existing Fire Alarm System if
deemed expandable by a licensed fire alarm installer.
Project Timeline:
Anticipated Bid Award Late February 2021
Shop Drawings and Phasing Meetings Until Mid-April 2021
Construction to start Mid-April 2021
Estimated Project Completion Time 12-14 months
0292-021121 HVAC Upgrade
229 Main Street, Nashua, New Hampshire 03061 — Phone (603) 589-3330 — Fax (603) 589-3233
