7
Principle of Operation:
A dry-contact Input from a Building Alarm Signal connected to JP 5 on the PCB will turn ON the Unit, placing it in the
OPERATE Mode. Removal of this signal will turn OFF the OPERATE Mode and turn ON the SERVICE ON Mode.
The Unit may also incorporate freeze protection devices. A device similar to a thermometer with dry-contact outputs that
close upon a set low temperature will turn the Unit OFF. Contact is made at CON 4-A on the PCB. Additional latching
solenoid(s) could be incorporated into the system that opens upon the un-latch sequence, thus partially draining the piping
system.
Equipment Maintenance:
The RLA Series Controller should have annual inspections.
ISIMET
recommends that you periodically conduct a brief test of the system to verify that the output circuit performs as
intended.
If examination of the unit indicates tampering,
ISIMET
recommends that you first review the installation and wiring
portions of this manual prior to placing the unit in service.
ISIMET
recommends that piping systems be thoroughly flushed and cleaned and tested for leaks prior to placing the
system into use. Periodic testing of these solenoids will assure that the piping system continues to function properly.
NOTICE:
If the unit requires service and it is necessary to disconnect the power supply, then prior to turning power supply
OFF, you should engage the SERVICE ON switch in order to insure that the water supply solenoid is open. To close the
water supply solenoid for maintenance purposes of the water service, engage the OPERATE ON switch twice leaving a brief
moment between each engagement.
If you have any questions regarding the operation and maintenance of the RLA Controller, please contact an
ISIMET
Service Representative.
The enclosure has a NEMA 1 rating. It is not intended for use in wet areas. Exercise caution to prevent exposure of the
interior compartment of the enclosure to moisture. If moisture is present within the enclosure,
ISIMET
recommends that the
control switch be turned OFF, power be disconnected from the unit until the source of the moisture is determined, and all
moisture is removed from the compartment.
The electronic controller (PCB) is sensitive to dust and other air-borne particles. Do not expose the interior compartment of
the enclosure to dust. During the semi-annual inspection, if dust or other material is present,
ISIMET
recommends that you
remove all foreign matter before operating the unit.
If the Unit fails to operate,
ISIMET
recommends that you check the power supply to the unit. With the control switch in the
ON position, LED Fuse 1 should illuminate. If not, check the service breaker and PCB fuses.
If the fuse is not damaged and the unit still does not function, contact ISIMET or your local Service Representative.
