Macurco SS102H User Manual
Macurco inc, Controllers & carbon monoxide detectors
CONTROLLERS & CARBON MONOXIDE DETECTORS
INSTALLATION & OPERATING INSTRUCTIONS
SUGGESTED WIRE SIZE VS LENGTH OF WIRE BETWEEN EACH SENSOR & CONTROL PANEL
SIZE MAXIMUM DISTANCE
#18 500 feet
#16 800 feet
#14 1250 feet
All equipment manufactured by Macurco is thoroughly tested and calibrated before leaving the factory. There is no need to
re-calibrate the detectors after installation. The equipment is designed to be fully operational after all wiring is completed. For more
technical and wiring information please refer to the Automatic Exhaust Fan Controllers For Parking Garages & Carbon Monoxide
Transducers data sheets.
Please refer to the attached data sheet titled “Carbon Monoxide System Layouts in Parking Garages”
SS102H & SS102HC-1 GENERAL INFORMATION
The SS102H is partially housed in a plastic case, which mounts on and becomes the cover of, a standard 4SD electrical box
(provided by the installer).
The SS102HC-1 is housed in a plastic case that is attached to a 4x4 plaster ring. It mounts on any four inch square
A low voltage, four conductor, #18 (or larger) cable connects each SS102H, or SS102HC-1 sensor to the SS103 control
panel. There must be an individual cable between each sensor and its control panel group of four terminals. These terminals are
labeled on the sensor cover adjacent to the terminal strip. Set up color coding so that the cable will match the same terminals at the
sensor and control panel. The SS102HC-1 has four pigtail leads: two red for power and a white and black for output. There is an
internal switch in the SS102HC-1 located on the printed circuit board that must be set to volts.
SS102H SENSOR OPERATION
The SS102H sensors have two lights: one green and one red. The green light is a pilot light showing the unit is on and
operational. When power is first applied to the unit, the green light will be off for 1 1/2 minutes while the sensor goes through a
warm-up cycle. After this 1 1/2 minute delay, the green light will be on continuously.
The red light, which is normally off, is part of a supervisory circuit that monitors critical functions of the unit. A failure in
the sensor is shown by a lighted red light, and at the same time a full range (about 4.8 volts) output on terminal A, to actuate relays
in the control panel.
The SS102H was factory calibrated, and cannot be re-calibrated on site. A functional test can be performed by holding a lit
cigarette (a good source of carbon monoxide) under the SS102H, so smoke drifts up through the sensor. This will cause the SS102H
to produce an output voltage to actuate the SS103 control panel. If the installation is in a parking garage, a gasoline powered vehicle
can be operated near the sensor to provide a system test. See the Carbon Monoxide Transducers data sheet for more technical
Although the SS102H is usable within a few minutes of being turned on, it will not reach its calibrated level for about 1
week. The SS102H must be continuously powered.