EXTERNAL CONTROL/MONITOR OPERATION
The DS-2C provides external control/monitor capability. Shielded cable rated 300V or
higher can be connected to TB2 to access this feature.
Connecting Black (4) to White (1) will activate the “Manual On” function. Connecting
Green (5) to White (1) will activate the “Standby/Reset” function. See the “Manual
Override Switch Function” page 3 for a description of these modes. The Red/Orange
(2/3) leads are connected to an internal low power monitor relay. This relay, rated at
24 VAC/VDC at 400 ma, will close with the load relay and can be used to externally
monitor activation of the sensor.
This terminal block is also the connection point for installing a CDP-2 interface cable.
POWER & ACTIVATION INDICATOR
A green lamp shines through a lens on the cover of the DS-2C to indicate operational status. If this lamp is OFF the DS-2C is not
receiving power. If this lamp is steady ON the DS-2C is powered but not triggered. If this lamp is FLASHING the DS-2C is powered
on and triggered, the main relay is closed, and attached equipment should be activated. Note that, even though snow or rain
may have stopped, the DS-2C indicator will continue to flash during the Delay-Off drying cycle.
MOISTURE GRID MAINTENANCE & REPLACEMENT
It is recommended that the DS-2C be powered down and the grid wiped clean with clear water at least once every 4 months.
Heavy deposits may be removed using a non-metallic scouring pad (Scotch-BriteTM or equivalent.) However, after a number of
years, the corrosive elements left behind when water is evaporated out of the moisture grid will eventually damage the grid
rings. The moisture grid can be easily replaced by ordering and installing an MG-5 “Moisture Grid Assembly” and following the
procedure below: THIS PROCEDURE SHOULD ONLY BE PERFORMED BY QUALIFIED PERSONNEL!
• Open all power and load breakers connected to the DS-2C.
• Open the front cover and remove the cable connector from the Grid Jack.
• While holding the reducing bushing, unscrew and remove the old moisture grid.
• Install the supplied thread sealing tape, place the new grid through the sealing ring, into the top hole, and screw the
assembly into the reducing bushing.
• Tighten the grid hand tight plus ¼ turn.
• Reconnect the new cable to the Grid Jack.
• Confirm that the four connector pins are properly aligned with the jack.
• Close the front cover, confirming that the front cover gasket is properly sealed.
• Reapply power.
•
Use Care When Replacing the Front Cover. Do Not Pinch the Gasket or Overtighten the Screws.
PRESEASON SNOW DETECTION TESTING
It is always a good idea to test the operation of the DS-2C prior to the winter season. Procure some clean water and, if the
outdoor temperature is above the trigger point, a can of spray component cooler. Clean the moisture grid following the
procedure outlined above and allow it to dry. Apply power to the DS-2C, drip some of the water onto the moisture grid, then
spray the temperature sensor protruding from the base of the enclosure with the component cooler. Once the temperature
sensor has reached the trigger point with water still present on the grid the DS-2C will activate. The user should hear the internal
control relay close and see the green lamp blink. Proper operation has been confirmed. Allow the grid to dry completely. To
clear the Delay-Off timer place the override switch into “Standby/Reset”, and then back to the “Automatic” position.
Pin Color Function
1 White GND/Common
2Red Deice On Mon A
3 Orange Deice On Mon B
4 Black Manual On
5 Green Standby/Reset
