MODULARM CORPORATION
61 MALL DRIVE, COMMACK, NY 11725
TEL 631-864-3860 ∙ FAX 631-864-3863
TABLE OF CONTENTS
MODEL 75 & 75B GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . .. . . . . .. . . . . 1
CONTROLS, INDICATORS & FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
INSTALLING THE ALARM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SETTING UP THE ALARM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
OPERATING SEQUENCE OF ALARM . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . 4
CALIBRATION . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
MODEL 75C CONTROL INSTRUCTIONS . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . 5
SPECIAL OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SAMPLE SPECIFICATION MODEL 75 & 75B . . . . . . .. . . . . . . . . . . . . . . . . . . . 6
WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . .7
MODEL 75 & 75B GENERAL DESCRIPTION
The Modularm Model 75 Temperature Monitoring System is designed to constantly
monitor temperature and will provide audible, visual and remote notification whenever
refrigeration failure occurs. The basic operation of the Model 75 is described as follows:
Through the use of an electronic temperature probe the ambient temperature of a walk-
in cooler or freezer or other temperature sensitive environment is constantly monitored.
When the monitored temperature goes above or below the temperature setpoints an
electronic time delay circuit is activated. The purpose of the time delay is to override
defrost cycles and other short term changes in temperature that occur during normal
operation. When temperature in the monitored area exceeds the setpoints beyond the
length of the time delay the alarm activates, providing audible, visual and, if so
connected, remote notification that an alarm condition has occurred.
(Note 1): The Model 75 offers Battery Backup as an option. (75B) When so ordered,
the Model 75B will also annunciate any power failures which may occur.
(Note 2): The Model 75 offers Thermostatic Control as an option. (75C) When so
ordered, the Model 75C will provide electronic temperature control.
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