Filter
Top Products
57
GUIDE SPECIFICATIONS -- 581J*04--09
Note about this specification:
This specification is in 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 8.5 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. NA
1. Shall be ASHRAE 62--2001 compliant.
2. Shall accept 18--32 VAC input power.
3. Shall have an operating temperature range from --40_F(--40_C) to 158_F(70_C), 10% -- 95% RH (non--condens-
ing).
4. Shall include an integrated economizer controller to support an economizer with 4 to 20 mA actuator input and no
microprocessor controller.
5. Controller shall accept the following inputs: space temperature, setpoint adjustment, outdoor air temperature, in-
door air quality, outdoor air quality, indoor relative humidity, compressor lock--out, fire shutdown, enthalpy, fan
status, remote time clock/door switch.
6. Shall accept a CO
2
sensor in the conditioned space, and be Demand Control Ventilation (DCV) ready.
7. 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/ dehumidify/ occupied.
8. Unit shall provide surge protection for the controller through a circuit breaker.
9. Shall be Internet capable, and communicate at a Baud rate of 38.4K or faster
10. Shall have an LED display independently showing the status of activity on the communication bus, and processor
operation.
581J