Project Name: Adelaide 500 Pavilion by Emtrol Location: Victoria Park, Adelaide Main Goal of Project:

• Provide controls for seven temporary skid-mounted air change package ACUs with evaporative precooling, at the Adelaide 500 V8 SuperCar race, including remote and local real-time monitoring of zone temperatures, ambient conditions, damper positions and logging all aspects of ACU operation for comprehensive post-event analysis.

Main Requirements of Project

• Remote and local monitoring via 4Gmodem
• All controls and control-wiring to be contained on each ACU platform.
• Separate heating, cooling and pre-cooling set points.
• Evaporative pre-cooling of supply air and independent switching set points.
• Evaporative water purge and supply solenoid control for each package unit.
• Supply Air Fan run and fault status with alarms.
• Compressor fault status with alarms.
• High-selected zone temperature control of up to 3 separate zones.
• Minimal wiring due to temporary nature of application (13 sensor cables and 1 actuator cable).
• Ability to fine tune and adjust during the event, both locally and remotely.
• Supply-air flow control (VAV) for individual zones on common ACU, for temperature regulation.
• Monitoring of ambient temperature and humidity.
• SMS notification to ‘on-call’ staff of individual alarms.
• Logging of:
  • zone temperatures
  • ambient temperature
  • ambient humidity
  • dew point
  • supply-air temperatures
  • compressor staging
  • set point adjustments
  • supply fan status (pressure switch)
  • evaporator pump call
  • heat/cool demand percent

Features/Details

Controls Used:

• Maxim II LD

Software Used: A variety of applications are catered to using the following software:

• eServer
• iComm

Heating: 100% Fresh air - each ACU system uses a single stage of DX (Direct expansion) heating. Cooling: 100% Fresh air - each ACU system uses evaporative cooling through a heat exchanger, followed by 2 stages of DX cooling. Data Logging:

• zone temperatures
• ambient temperature
• ambient humidity
• dew point
• supply-air temperatures
• compressor staging
• set point adjustments
• supply fan status (pressure switch)
• evaporative pump call
• heat/cool demand percent

Overview

What unusual issues has this Project posed?

• The entire system including ducting is required to be dismantled and stored for most of the year. The units are run 24/7 for the four-day event.
• Remote and Local monitoring.

How did we overcome them?

• The temporary nature of the structure requires controls to be mounted on each ACU assembly as it is disassembled and stored at the event end. All controls, supply-air sensors and airflow switches are mounted locally at the ACU on a pre-fabricated skid, and fork lifted in to place every year. This leaves only minimal (and cost effective) temporary wiring every year – a network LAN and the zone temp sensors.
• Network access and monitoring is via 4G modem. 

Which controls/software were used to address each requirement? Maxim II LD:

• All HVAC control functions and logging