Ouellet DS-2C - Manual (Page 7)

Selecting a Mounting Location for the DS-2C
The interleaved grid on the top of the DS-2C is the precipitation or “moisture" sensor. The brass cylinder protruding from
the bottom of the enclosure is the temperature sensor. For reliable rain and snow detection the unit must be mounted in
a location that exposes the moisture sensor to a clear view of the sky. The unit should not be mounted directly under
eaves or overhangs. It should not be mounted so close to the ground that it may become buried in snow. For proper
temperature detection the DS-2C must be mounted outdoors, away from furnace vents, dryer vents, and other sources
of heat. Note that, when powered, the DS-2C moisture grid will always remain hot. This is normal. This allows the sensor
to continuously melt snow and evaporate both rain and snow from the grid.
The DS-2C can be mounted by screwing the base conduit hub onto an appropriate size free-standing conduit or by
using the mounting holes in each corner of the enclosure.
DO NOT DRILL HOLES THROUGH THE ENCLOSURE FOR MOUNTING!
NE FONT PAS LES TROUS DE FORET PAR LA BOÎTE POUR LE SUPPORT!
This can allow water into the enclosure causing a potential shock hazard. It is recommended that a weatherproof
junction box be mounted below the DS-2C for termination of the power and load pigtails to the building wiring.
Use Care When Replacing the Front Cover. Do Not Pinch the Gasket or Overtighten the Screws.
SENSITIVITY ADJUST
DELAY OFF ADJUST
TEMPERATURE ADJUST
CONFIGURATION SWITCH
GRID JACK
SWITCH JACK
CONTROL/MONITOR JACK
INPUT POWER LOAD
ALWAYS FOLLOW LOCAL AND NATIONAL ELECTRICAL CODES
TOUJOURS SUIVRE LES CODES ÉLECTRIQUES LOCAUX ET NATIONAUX
2
External Control/Monitor Operation
General Safety Instructions
1. THIS UNIT SHOULD BE INSTALLED, OPENED, AND REPAIRED BY QUALIFIED PERSONNEL
ONLY!
CETTE UNITÉ DEVRAIT ÊTRE INSTALLÉE, OUVERTE, ET RÉPARÉE PAR LE PERSONNEL
QUALIFIÉ SEULEMENT!
2. To avoid shock hazard do not open the front cover with power connected to the DS-2C or any controlled
equipment.
Pour éviter la décharge électrique déconnectez toute la puissance avant d'ouvrir la couverture du DS-
2C.
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” 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-Brite TM
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!
CE PROCÉDÉ DEVRAIT SEULEMENT ÊTRE EXÉCUTÉ PAR LE PERSONNEL QUALIFIÉ!
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 (Radio
Shack Part #64-4321 or equivalent.) 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.
7
Pin Color Function
1 White GND/Common
2 Red Deice On Mon A
3 Orange Deice On Mon B
4 Black Manual On
5 Green Standby/Reset