Guide Specifications 580J*04-14

580J

GUIDE SPECIFICATIONS - 580J*04-14

Note about this specification:

Bryant wrote this specification in the 2004 version of the “Masterformat” as published by the Construction Specification Institute. Please feel free to copy this specification directly into your building spec.

Gas Heat/Electric Cooling Packaged Rooftop

HVAC Guide Specifications

Size Range:	3 to 12.5 Nominal Tons
Section	Description
23 06 80	Schedules for Decentralized HVAC Equipment

23 06 80.13 Decentralized Unitary HVAC Equipment Schedule

23 06 80.13.A. Rooftop unit schedule

1.Schedule is per the project specification requirements.

23 07 16 HVAC Equipment Insulation

23 07 16.13 Decentralized, Rooftop Units:

23 07 16.13.A. Evaporator fan compartment:

1.Interior cabinet surfaces shall be insulated with a minimum 1/2-in. thick, minimum 1 1/2 lb density, flexible fiberglass insulation bonded with a phenolic binder, neoprene coated on the air side.

2.Insulation and adhesive shall meet NFPA 90A requirements for flame spread and smoke generation.

23 07 16.13.B. Gas heat compartment:

1.Aluminum foil-faced fiberglass insulation shall be used.

2.Insulation and adhesive shall meet NFPA 90A requirements for flame spread and smoke generation.

23 09 13 Instrumentation and Control Devices for HVAC

23 09 13.23 Sensors and Transmitters

23 09 13.23.A. Thermostats

1.Thermostat must

a.energize both “W” and “G” when calling for heat.

b.have capability to energize 2 different stages of cooling, and 2 different stages of heating.

c.include capability for occupancy scheduling.

23 09 23 Direct-digital Control system for HVAC

23 09 23.13 Decentralized, Rooftop Units:

23 09 23.13.A. N/A

23 09 23.13.B. RTU-MP - Open protocol, direct digital controller:

1.Shall be ASHRAE 62-2001 compliant.

2.Shall accept 18-30VAC, 50-60Hz, and consumer 15VA or less power.

3.Shall have an operating temperature range from -40_F (-40_C) to 130_F (54_C), 10% - 90% RH (non-condens- ing).

4.Shall include built-in protocol for BACNET (MS/TP and PTP modes), Modbus (RTU and ASCII), Johnson N2 and LonWorks. LonWorks Echelon processor required for all Lon applications shall be contained in separate com- munication board.

5.Shall allow access of up to 62 network variables (SNVT). Shall be compatible with all open controllers

6.Baud rate Controller shall be selectable using a dipswitch.

7.Shall have an LED display independently showing the status of serial communication, running, errors, power, all digital outputs, and all analog inputs.

8.Shall accept the following inputs: space temperature, setpoint adjustment, outdoor air temperature, indoor air qu- ality, outdoor air quality, compressor lock-out, fire shutdown, enthalpy switch, and fan status/filter status/ humid- ity/ remote occupancy.

9.Shall provide the following outputs: economizer, fan, cooling stage 1, cooling stage 2, heat stage 1, heat stage 2, heat stage 3/ exhaust/ reversing valve.

10.Shall have built-in surge protection circuitry through solid state polyswitches. Polyswitches shall be used on in- coming power and network connections. Polyswitches will return to normal when the “trip” condition clears.