McQuay OM 920-1 5
Introduction
Getting Started
This manual contains information designed to assist the field technician with unit setup. The
technician will need to be familiar with the following topics at a minimum to successfully set
up unit operation.
• Keypad navigation/editing/passwords
• Control Mode
• Occ Mode
• DSP Setpoint
• BSP Setpoint
• Heat/Cool Changeover (Zone Setpoints)
• DAT Clg Setpoint
• DAT Htg Setpoint
• Clg Enable (OAT/EWT lockout)
• Htg Enable (OAT lockout)
• Econo Enable (Changeover temp/Enthalpy switch)
• Ventilation Limit/OA damper
WARNING
Excessive moisture in the control panel can cause hazardous working
conditions and improper equipment operation.
When servicing this equipment during rainy weather, the electrical
components in the main control panel must be protected from the rain.
CAUTION
Extreme temperature hazard. Can cause damage to system components.
The MicroTech III controller is designed to operate in ambient temperatures
from -20°F to 125°F. It can be stored in ambient temperatures from -40°F to
140°F. It is designed to be stored and operated in relative humidity up to 95%
(non-condensing).
CAUTION
Static sensitive components. A static discharge while handling
electronic circuit boards can cause damage to the components.
Discharge any static electrical charge by touching the bare metal inside the
main control panel before performing any service work. Never unplug any
cables, circuit board terminal blocks, relay modules, or power plugs while
power is applied to the panel.
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