135
Note about this specification:
This specification is in the “Masterformat” as published by the Construc-
tion 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 6 Nominal Tons
Bryant Model Number: 582K*04-07
Part 1 — (23 06 80) Schedules for Decentralized HVAC
Equipment
1.01 (23 06 80.13) Decentralized Unitary HVAC Equipment
Schedule
A. (23 06 80.13.A.) Rooftop unit (RTU) schedule:
1. Schedule is per the project specification requirements.
Part 2 — (23 07 16) HVAC equipment insulation
2.01 (23 07 16.13) Decentralized, Rooftop Units:
A. (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 pheno-
lic binder, neoprene coated on the air side.
2. Insulation and adhesive shall meet NFPA 90A
requirements for flame spread and smoke generation.
B. (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.
Part 3 — (23 09 13) Instrumentation and control devices for
HVAC
3.01 (23 09 13.23) Sensors and Transmitters
A. (23 09 13.23.A.) Thermostats
1. Thermostat must
a. energize both “W” and “G” when calling for
heat.
b. have capability to energize 1 or 2 stages of cool-
ing, and 2 different stages of heating.
c. include capability for occupancy scheduling.
Part 4 — (23 09 23) Direct Digital Control system for HVAC
4.01 (23 09 23.13) Decentralized, Rooftop Units:
A. (23 09 23.13.A.) RTU Open Protocol, Direct Digital
Controller:
1. Shall be ASHRAE 62 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% to 90% RH
(non-condensing).
4. Shall include built-in protocol for BACnet
1
(MS/
TP and PTP modes), Modbus
2
(RTU and ASCII),
Johnson N2 and LonWorks
3
. LonWorks Echelon
processor required for all Lon applications shall be
contained in separate communication 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 tempera-
ture, setpoint adjustment, outdoor air temperature,
indoor air quality, outdoor air quality, compressor
lock-out, fire shutdown, enthalpy switch, and fan
status/filter status/humidity/ remote occupancy.
9. Shall provide the following outputs: economizer,
fan, cooling stage 1, cooling stage 2, heat stage 1,
heat stage 2, exhaust, reversing valve/high fan
speed.
10. Shall have built-in surge protection circuitry
through solid-state polyswitches. Polyswitches
shall be used on incoming power and network con-
nections. Polyswitches will return to normal when
the “trip” condition clears.
11. Shall have a battery back-up capable of a minimum
of 10,000 hours of data and time clock retention
during power outages.
12. Shall have built-in support for Bryant technician
tool.
13. Shall include an RS-485 protocol communication
port, an access port for connection of either a com-
puter or a Bryant technician tool, an RS-485 port
for network communication to intelligent space
sensors and displays, and a port to connect an
optional LonWorks communications card.
14. Software upgrades will be accomplished by either
local or remote download. No software upgrades
through chip replacements are allowed.
Part 5 — (23 09 33) Electric and Electronic Control System
for HVAC
5.01 (23 09 33.13) Decentralized, Rooftop Units:
A. (23 09 33.13.A.) General:
1. Shall be complete with self-contained low-voltage
control circuit protected by a resettable circuit
breaker on the 24-v transformer side. Transformer
shall have 75VA capability.
2. Shall utilize color-coded wiring.
3. Shall include a Unit Control Board to conveniently
and safely provide connection points for vital con-
trol functions such as: smoke detectors, phase
1. BACnet is a trademark of ASHRAE.
2. Modbus is a registered trademark of Schneider Electric.
3. LonWorks is a registered trademark of Echelon Corporation.
Guide specifications
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