Danfoss DS-224C Installation guide

LIMITED WARRANTY

The DS-224C 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-224C

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
TOLL FREE: 1-888-DANFOSS (326-3677)
Option #3 for heating
FAX: [phone]

Visit us on the Internet at: heating.danfoss.us

RAIN/SNOW SENSOR CONTROLLER

INSTALLATION MANUAL

INDICATOR

OFF

POWER

ENCLOSURE TYPE 3R

RAIN/SNOW SENSOR CONTROLLER

INPUT
22−28V AC/DC 500mA 50/60 Hz
CONTROL
30 A 24V AC, 20 A 28V DC

DS−224C

WARNING: NOT FOR HIGH VOLTAGE CONTROL

AVERTISSEMENT: PAS POUR LE CONTRÔLE DE HAUTE TENSION

ACTIVATED

CONTROL SWITCH

MANUAL ON
AUTOMATIC
STANDBY/RESET

Danfoss Electric Heating Division

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-224C or any

controlled equipment. Limit input voltage to 22-28 VAC/VDC

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

224C. Limiter la tension d'entrée à 22-28 VAC/VDC

Selecting a Mounting Location for the DS-224C

The interleaved grid on the top of the DS-224C 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-224C must be mounted outdoors, away from furnace vents, dryer vents, and
other sources of heat. Note that, when powered, the DS-224C 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-224C 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-224C 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

TEMPERATURE ADJUST

DELAY OFF ADJUST

SENSITIVITY ADJUST

ALWAYS FOLLOW LOCAL AND NATIONAL ELECTRICAL CODES

TOUJOURS SUIVRE LES CODES ÉLECTRIQUES LOCAUX ET NATIONAUX

GRID JACK

INPUT POWER

2

SWITCH JACK

LOAD

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-224C 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 cover of the DS-224C to indicate operational status. If this lamp
is OFF the DS-224C is not receiving power. If this lamp is steady ON the DS-224C is powered but not
triggered. If this lamp is FLASHING the DS-224C 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-224C indicator will continue to flash during the Delay-Off drying cycle.

Preseason Snow Detection Testing

It is always a good idea to test the operation of the DS-224C 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 DS­224C, 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-224C 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.

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