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Smoke Detector Sensor (Optional)
This sensor is only applicable on units equipped with a RTOM.
It provides high limit "shutdown" of the unit and requires a
manual reset. The sensor is used to detect smoke due to fire in
the air conditioning or ventilation ducts.
Important: The supply and return air smoke
detectors are designed to shut off the unit if smoke
is sensed in the supply air stream or return air
stream. This function is performed by sampling the
airflow entering the unit at the return air opening.
Follow the instructions provided below to assure that
the airflow through the unit is sufficient for adequate
sampling. Failure to follow these instructions will
prevent the smoke detectors from performing it's
design function.
Important: Airflow through the unit is affected by the
amount of dirt and debris accumulated on the indoor
coil and filters. To insure that airflow through the unit
is adequate for proper sampling by the return air
smoke detector, complete adherence to the
maintenance procedures, including recommended
intervals between filter changes, and coil cleaning is
required.
Important: Periodic checks and maintenance
procedures must be performed on the smoke
detector to insure that it will function properly. For
detailed instructions concerning these checks and
procedures, refer to the appropriate section(s) of the
smoke detector Installation and Maintenance
Instructions provided with the literature package for
this unit.
In order for the supply air smoke detector or return air
smoke detector to properly sense smoke in the supply air
stream or return air stream, the air velocity entering the
smoke detector unit must be between 500 and 4000 feet
per minute. Equipment covered in this manual will develop
an airflow velocity that falls within these limits over the en-
tire airflow range specified in the evaporator fan perfor-
mance tables.
There are certain models, however, if operated at low air-
flow, will not develop an airflow velocity that falls within the
required 500 to 4000 feet per minute range. For these mod-
els, the design airflow shall be greater than or equal to
1000 feet per minute MINIMUM.
Pre-Installation Checklist
Phase Monitor (Optional)
ReliaTel Control Only
This sensor monitors voltage between the 3 conductors of
the 3 phase power supply. Two LED lights are provided. The
green light indicates that a balanced 3 phase supply circuit
is properly connected. The red light indicates that unit op-
eration has been prevented. There are two conditions that
will prevent unit operation.The power supply circuit is not
balanced with the proper phase sequence of L1,L2,L3 for
the 3 conductors of a 3 phase circuit. The line to line voltage
is not between 180 volts and 633 volts.
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