10 RT-SVX23D-EN
General Information
Note: 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 entire airflow range specified in the evaporator
fan performance tables.
There are certain models, however, if operated at low airflow, will not develop an airflow velocity
that falls within the required 500 to 4000 feet per minute range. For these models, the design airflow
shall be greater than or equal to 1000 feet per minute MINIMUM.
Phase Monitor
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 operation 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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