Danfoss DS-8C Operating guide

LIMITED WARRANTY

The DS-8C is warranted against defects in workmanship and materials for two years from date of sale. This warranty does not apply to damage resulting from accident, misuse, or alteration nor where connected voltage is more than 5% above the configured operating voltage, nor to equipment improperly installed or wired or maintained in violation of this Owner’s Manual. No other written or oral warranty applies. No employee, agent, dealer or other person is authorized to give any warranties on behalf of DANFOSS.

CAUTION: Read all instructions carefully before installation. Save this Installation Manual for future reference.

DS-8C

Units returned for warranty repair cannot be modified from shipped condition and leads must protrude a minimum of 6 inches from the base conduit hub. Repair costs of a modified unit will be quoted as the unit must be returned to the original, unmodified condition prior to return shipping. The customer shall be responsible for all costs incurred in the removal or reinstallation and shipping of the product for repairs. Within the limitations of this warranty, inoperative units should be returned, freight prepaid, to DANFOSS, and we will repair or replace, at our option, at no charge to you with return freight paid by DANFOSS. It is agreed that such repair or replacement is the exclusive remedy available from DANFOSS and that DANFOSS IS NOT RESPONSIBLE FOR DAMAGES OF ANY KIND, INCLUDING INCIDENTAL AND CONSEQUENTIAL DAMAGE. Some states do not allow the exclusion or limitation of incidental or consequential damages so the above exclusion may not apply to you. The warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

DANFOSS ELECTRIC HEATING DIVISIONa Toronto, Ontario, Canad TOLL FREE: 866-676-8062

0 PHONE: 905-285-205

FAX: 905-285-2055

Visit us on the Internet at: www.LX.Danfoss.com

Intertek

RAIN/SNOW SENSOR CONTROLLER

INSTALLATION MANUAL

AUTOMATED SYSTEMS

ENCLOSURE TYPE 3R

RAIN/SNOW SENSOR CONTROLLER

CONFORMS TO UL STD 508 CERTIFIED TO CAN/CSA STD C22.2 NO. 14

INPUT 100−277V AC 0.15 A 50/60 Hz CONTROL 30 A 277V AC, 20 A 28V DC

AVERTISSEMENT: IL PEUT Y AVOIR UN CIRCUIT SECONDAIRE SOUS TENSION

ENGINEERING

DS−8C

DANGER

WARNING: THIS UNIT MAY BE SUPPLIED BY MORE THAN ONE BREAKER

INDICATOR

OFF

POWER

ACTIVATED

Intertek

3175102

CONTROL SWITCH

MANUAL ON AUTOMATIC STANDBY/RESET

Danfoss Electric Heating Division Toronto, Ontario, Canada

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-8C or any controlled

equipment.

Pour éviter la décharge électrique déconnectez toute la puissance avant d'ouvrir la couverture du DS-

8C.

Selecting a Mounting Location for the DS-8C

The small corded device with the interleaved grid is the remote precipitation or "moisture" sensor. The brass cylinder protruding from the bottom of the DS-8C enclosure is the temperature sensor. For reliable rain and snow detection the moisture sensor must be exposed to a clear view of the sky. Reference Page 3 "Moisture Sensor Mounting & Termination" for guidance in mounting the DS-8C moisture sensor. For proper temperature detection the DS-8C enclosure must be mounted outdoors powered, the DS-8C moisture grid will always remain hot melt/evaporate both rain and snow from the grid. The DS-8C enclosure 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-8C 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.

CONFIGURATION SWITCH

TEMPERATURE ADJUST

DELAY OFF ADJUST

SENSITIVITY ADJUST

, away from furnace vents, dryer vents, and other sources of heat. Note that, when

CONTROL/MONITOR JACK

. This is normal. This allows the sensor to continuously

GRID TERMINAL

SWITCH JACK

External Control/Monitor Operation

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

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.

The DS-8C 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

Power & Activation Indicator

A green lamp shines through a lens on the c ov er of the DS-8C to indic ate operational s tatus . If this lamp is OFF the DS-8C is not receiving power. If this lamp is steady ON the DS-8C is powered but is not triggered. If this lamp is FLASHING the DS-8C is powered on and triggered, the main relay is closed, and attached equipment should be activated. Note that, even though s now or rain may have stopped, the DS8C indicator will continue to flash during the Delay-Off drying cycle.

Fine Adjustment for Efficient Operation

The DS-8C is shipped with the TRIG TEMP and DELAY OFF adjustments in the center position, representing 39°F (3.9°C) and 60 minutes of Delay-Off time respectively. It is also set for highest SENSITIVITY. Depending on local conditions the user may find that fine adjustment of the controls may provide more satisfactory operation. If the sensor does not trigger during very wet snows the trigger temperature may need to be adjusted higher. Constant triggers from snow falling from trees or overhangs may be reduced by adjusting SENSITIVITY. The Delay-Off time can also be adjusted to provide clean melt-off without excessive running time. Fine adjustment can both save operating expense and provide more reliable operation. However, to keep reliability high, always make adjustments in small increments

Moisture Grid Maintenance & Replacement

It is recommended that the DS-8C be powered down and the moisture grid wiped clean with clear water at least once every 4 months. Heavy deposits may be removed using a non-metallic scouring pad (Scotch-

or equivalent.) However, after a number of years, the corrosive elements left behind when water is

Brite evaporated out of the moisture grid will eventually damage the grid rings. The moisture grid can be easily replaced by ordering and installing a new MG-3 “Moisture Grid Assembly”. Reference the “Moisture Sensor Mounting & Termination” section for information on replacing the moisture grid.

INPUT POWER

LOAD

ALWAYS FOLLOW LOCAL AND NATIONAL ELECTRICAL CODES

TOUJOURS SUIVRE LES CODES ÉLECTRIQUES LOCAUX ET NATIONAUX

Preseason Snow Detection Testing

It is always a good idea to test the operation of the DS-8C 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-8C, drip some of the water onto the moisture grid, then, if the temperature is above the trigger point, 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-8C will activate. The user should hear the internal control relay close. The lamp will 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.

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