SECTION 23 09 00 – BUILDING AUTOMATION SYSTEM
This is supplemental language for an AHU spec. This is not an all inclusive spec. This is language
that is meant to be copied and pasted into an existing AHU spec.
PART 1 - GENERAL
1.1
Scope of Work
A.
1.2
The operating controls for the AHU sequence shall be furnished by the BAS contractor and
factory installed and wired by the AHU manufacturer. The AHU manufacturer shall still
provide controls that are not called to be furnished by the BAS contractor.
Submittals
A.
Provide a separate controls submittal for the controls for the AHU. The submittal shall include:
1.
Data sheets
2.
Bill of Materials
3.
Wiring diagrams
4.
Schematic of device locations
5.
Sequence of operations
B.
The AHU manufacturer shall produce a production wiring diagram based on the BAS
contractor’s wiring diagram. The BAS contractor shall review the AHU manufacturer’s wiring
diagram during submittal and sign-off on the final diagram before the unit is put into
production.
1.3
Warranty
1.
The BAS Contractor shall warranty the controls that they furnished and the programming
of the sequence of operations.
2.
The AHU Manufacturer shall warrant the controls that they furnished, the installation of
the controls and the wiring and connections.
PART 2 - PRODUCTS
PART 3 - EXECUTION
3.1
Indoor Package Air Handling Units Electrical Installation
A.
Package air handling unit controls shall be installed in the factory. BAS Contractor shall
coordinate with AHU manufacture for proper controls installation and wiring requirements.
B.
The BAS contractor shall furnish the following controls for factory installation:
Project Name
230900 - 1
BAS AND CONTROL FOR HVAC
Date
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
C.
3.2
DDC controller – BACnet B-BC level
DDC controller power supply (120/24 with circuit protection)
Input/output modules
Communication ports
Sensors for the operating sequence or to meet the BAS points list, including temperature,
humidity, pressure, airflow, current.
Damper actuators and linkages
Coil control valves and valve actuators
Pilot relays
Freezestats
High and low pressure switches
Filter switch
The AHU manufacturer shall furnish the following controls and related devices:
1.
Controls not listed above but are required for the operation of the unit
2.
Enclosure for controls with separation between high, line, and low voltage
3.
Starters and contactors
4.
VFDs
5.
Power conditioning controls
6.
Refrigeration controls and safeties
7.
Smoke detectors
Air Handling Units temperature controls factory testing
A.
The AHU manufacturer shall test the following at the factory:
1.
Controls safeties
2.
Freezestats shall cut power to dampers and stop supply fan
3.
High and low pressure switches shall stop fans
4.
Smoke detectors shall stop fans
5.
Test the continuity of the wiring to the sensors
6.
Test the power to the damper and valve actuators and test continuity of the signal wiring
7.
Test that the control pilot relays start/stop the equipment they are wired to.
8.
Test power to the DDC controller
B.
The AHU manufacturer shall test the operation of the controls that they furnished, such as
refrigeration controls, VFDs, starters, etc.
C.
Testing of the operational sequences of operation shall be conducted by the BAS Contractor in
the field.
D.
Shipping
1.
The DDC controller shall be packaged to prevent damage during shipping from the AHU
manufacturer. If the DDC controller is mounted on a DIN rail, or if the electronic board
is susceptible to vibration damage, then the AHU manufacturer shall remove the DDC
controller from the enclosure and package it so that it is protected during shipping.
2.
The BAS contractor shall re-mount the DDC controller in the field.
Project Name
Date
230900 - 2
BAS AND CONTROL FOR HVAC