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.

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 DIVISION

Toronto, Ontario, Canada

TOLL FREE: 866-676-8062

PHONE: [phone]

FAX: [phone]

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

CM

C

LISTED

US

Intertek

CAUTION: Read all instructions carefully before installation.

Save this Installation Manual for future reference.

DS-8C

RAIN/SNOW SENSOR CONTROLLER

INSTALLATION MANUAL

	AUTOMATED	INDICATOR
	SYSTEMS	OFF
	ENGINEERING	POWER
	ENCLOSURE TYPE 3R DS−8C
		ACTIVATED
	RAIN/SNOW SENSOR CONTROLLER
	DANGER	CM
		C LIS TED US
	CONFORMS TO UL STD 508	Intertek
	CERTIFIED TO CAN/CSA STD C22.2 NO. 14	3175102
	INPUT	CONTROL SWITCH
	100−277V AC 0.15 A 50/60 Hz	MANUAL ON
	CONTROL	AUTOMATIC
	30 A 277V AC, 20 A 28V DC	STANDBY/RESET

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

AVERTISSEMENT: IL PEUT Y AVOIR UN CIRCUIT SECONDAIRE SOUS TENSION

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 DS8C.

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, away from furnace vents, dryer vents, and other sources of heat. Note that, when powered, the DS-8C moisture grid will always remain hot. This is normal. This allows the sensor to continuously 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.

CONTROL/MONITOR JACK
CONFIGURATION SWITCH	GRID TERMINAL	SWITCH JACK

TEMPERATURE ADJUST
DELAY OFF ADJUST
SENSITIVITY ADJUST
INPUT POWER	LOAD

ALWAYS FOLLOW LOCAL AND NATIONAL ELECTRICAL CODES TOUJOURS SUIVRE LES CODES ÉLECTRIQUES LOCAUX ET NATIONAUX

External Control/Monitor Operation

		Color		The DS-8C provides external control/monitor capability. Shielded
	Pin		Function
				cable rated 300V or higher can be connected to TB2 to access
	1	White	GND/Common
				this feature.	Connecting Black (4) to White (1) will activate the
	2	Red	Deice On Mon A
				“Manual On”	function.	Connecting Green (5) to White (1) will
	3	Orange	Deice On Mon B
				activate the “Standby/Reset” function. See the “Manual Override
	4	Black	Manual On
				Switch Function” for		a description of these modes. The
	5	Green	Standby/Reset
				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-8C to indicate operational status. 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 snow 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 (ScotchBriteTM 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 a new MG-3 “Moisture Grid Assembly”. Reference the “Moisture Sensor Mounting & Termination” section for information on replacing the moisture grid.

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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