CaptiveAire RTULink, Installation, Operation And Maintenance Manual

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5
SAFETY INFORMATION
General
Monitorin
g components utilize a mixture of traditional controls along with a “smart” digital circuit board controller, referred
to as the RTULink control board. The RTULink is designed to be installed in the controls cabinet of a roof top unit (RTU).
The RTULink board is powered by 24 VAC, which is provided by the same step-down transformer that is intended to
power the unit’s thermostat.
Some parts of the printed circuit boards can be electrically live and some surfaces can be hot. Inappropriate use and
incorrect installation or operation creates the risk of injury to personnel and/or damage to equipment. All operations
concerning installation, commissioning, and maintenance must be carried out by a qualified, skilled technician who is
familiar with the installation, assembly, commissioning, and operation of the control panel and the application for which it
is being used.
Installation
Ensure proper handling of components and avoid excessive mechanical stress. Do not bend any components during
transport, handling, installation, or maintenance. Do not touch any electronic components or contacts. These boards
contain electrostatically sensitive components, which can easily be damaged by inappropriate handling. Static control
precautions must be adhered to during installation, testing, servicing, and repairing of these boards. Component damage
may result if proper procedures are not followed.
To ensure proper operation, do not install any of the monitoring boards where they will be subjected to adverse
environmental conditions such as combustible, oily, or hazardous vapors; corrosive chemicals; excessive dust, moisture
or vibration; direct sunlight or extreme temperatures.
When working on live panel controllers, applicable national safety regulations must be observed. The electrical installation
must be carried out according to the appropriate regulations (e.g. cable cross-sections, circuit breaker, protective earth
[PE] connection). While this document does make recommendations in regards to these items, national and local codes
must be adhered to.
It is recommended that all thermistor wiring be completed with low voltage thermistor wire and that all low voltage sensor
wiring be completed with 18-5 thermistor wire with braided conductors. All wiring to and from the control boards should be
routed using a code-approved method. Grommets should be used whenever wiring enters or exits an electrical box or
enclosure or whenever it is determined that friction or sharp edges may deteriorate wire. When routing wire internal to
RTUs, utilize existing wire channels within the unit and zip tie the wire to existing wires every two feet within the unit to
prevent it from moving and coming in contact with motors, gears, heating elements, etc.