This is a used sensor that we used on our heated driveway. This worked when we dismantled the system, because our driveway was reconfigured. The DS-224 Rain/Snow Sensor Controller Designed for Low Voltage Hydronic and Battery Powered Systems Automatic Activation means Lower Deicing Costs Reliable Rain and Snow Detection 24VAC/VDC Operation, Only 20 VA Required Full 30A @ 24VAC Control Replaceable Precipitation Sensor Easy Installation, Full Access to Electronics 8 Different Functions, 1 Part Number Adjustable Temperature Trigger Point Adjustable Delay Off Cycle, Selectable 30-90 Mins or 2-6 Hrs Exclusive Adjustable Sensitivity Control Selectable Low Temperature Cutoff Smart "Manual On" Operates for One Delay Off Cycle High Power, Low Price! The DS-224 is an advanced low voltage version of the DS-2B. It is primarily designed for hydronic pavement snow melting applications and battery/solar powered railroad deice and lubrication control. The 24VAC/VDC supply means less expensive wiring, no requirement for conduit, and lower installation costs. The unit is housed in a two gang PVC enclosure. The overall dimensions of the DS-224 are 4 3/4 "(120) x 7"(178) x 2 3/4 "(70). The unit weighs 2 pounds. The user may access all electronics by removing the four front cover screws. Wiring is performed by terminating your existing wiring to the pre-installed pigtails. The DS-224 is mounted by either attaching the mounting hub to a rigid 1/2 " or 3/4 " conduit or by installing screws through the four mounting tabs provided. The DS-224 can be powered from a 22-28VAC/VDC source. Peak power consumption is 15 VA at startup, 8.5 VA steady state triggered, 5 VA steady state untriggered. Power input is polarity protected for a DC supply. The unit provides a single 24VAC/30A or 24VDC/20A normally open load contact set. This contact set is paralleled with a low power contact set to provide remote control and activation monitoring. Operational temperature range is -40oC to +85oC. The table below outlines the operating modes for the DS-224. Trigger Temperature (TT) is adjustable from 34oF-44oF using an on-board control. When ambient air temperature (AT) is below this trigger point precipitation is assumed to be snow or freezing rain. When above the trigger point, precipitation is assumed to be rain. "Delay Off" refers to the internal drying cycle timer of the DS-224. The timer is used to allow the DS-224 to dry the heated surface through evaporation once precipitation has stopped. The drying cycle reduces the chance that moisture left behind by the melting process will refreeze into ice. This timer is restarted by each precipitation detection. Therefore, the DS-224 will continue to operate as long as precipitation and trigger temperature is detected, then for the "Delay Off" time once rain or snow stops. It is assumed that, when operating as a sensor, the DS-224 is supplying an activation signal to an external control system. All "sensor" modes provide a minimum 2 minute closure, reducing cycling of the external controller. The Delay Off cycle has been extended for hydronic applications and is determined by the Long Delay (LD) switch setting, DEL switch setting and the DEL adjustment. Delay Off is 30-90 minutes in non-LD "controller" mode and 2-6 hours in LD "controller" mode. An environmentally sealed control switch is provided. The "Manual On" function activates the controlled equipment for testing and special operational conditions. The "Automatic" position allows the DS-224 to handle all detections and control. The "Standby/Reset" position disables triggering and can also be used to clear the delay off timer (see below) from true or test activation. If the switch is placed in "Manual On" for less than 2 seconds, then switched back to "Automatic" the controller will execute one delay off cycle. This allows a controlled manual activation of the snow melt system without the fear of forgetting and leaving the system in "Manual On" for an extended and potentially very expensive period of time. "Standby/Reset" can still be used to clear this delay off cycle. Remote control and monitor up to 1000 feet away is also available when the optional CS-1 C/M cable listed is installed. The DS-224 is also compatible with the DP-7B, DP-7EX, and CDP-2 remote control/status panels. The Low Temperature Cutoff (LTC) option is typically used on deicing or snow melting systems with limited output capacity. If selected, the sensor will not trigger if precipitation is detected below 15oF. However, if the deicing system has been activated, precipitation continues, and the ambient temperature drops below 15oF, LTC will be ignored. This assures that water left behind on the surface during the heating cycle will not immediately refreeze into ice as a result of deactivating the deicing system. The DS-224 also features a new innovation, a Trigger Sensitivity Adjustment. Previous units have always detected and triggered on the first drop of rain, the first flake of snow. While this has always provided a highly reliable detection it may create "nuisance" triggers in some installations. Snow blowing off a roof or falling from a tree could cause the system to activate for a delay cycle when its not needed, increasing operating costs. The sensitivity adjustment allows setting the number of seconds the precipitation grid must see continuous rain or snow before the sensor is triggered and ranges from 3 seconds to 4 minutes. A higher sensitivity setting assures quick detection no matter the conditions. A lower sensitivity setting will allow a few stray drips of rain or flakes of snow to be ignored but a heavier downfall will trigger the system. Function Ambient Temp (AT) Delay Off (LD Off) Delay Off (LD On) Suggested Application Snow sensor w\o LTC AT < TT 2 Min 2 Min Snow and ice alert, Sensor for external deice/snow melt controller (unlimited heat) Snow sensor w\LTC TT>AT>15oF 2 Min 2 Min Sensor for external deice/snow melt controller (limited heat) Snow controller w\o LTC AT < TT 30-90 Min 2-6 Hrs Stand-alone controller for electric/hydronic snow melting Snow controller w\LTC TT>AT>15oF 30-90 Min 2-6 Hrs Stand-alone controller for electric/hydronic snow melting Precipitation sensor Not Used 2 Min 2 Min Snow, ice, and rain alert, Ku band rain and snow diversion Precipitation controller Not Used 30-90 Min 2-6 Hrs Snow, ice, and rain alert, Ku band rain and snow diversion Rain sensor AT>TT 2 Min 2 Min Rain alert, Ku band rain diversion Rain controller AT>TT 30-90 Min 2-6 Hrs Ku band rain diversion, intake and exhaust fan control Download or view the DS-224 Installation Manual in PDF DS-224 Specifications Dimensions 4 3/4 "(120) x 7"(178) x 2 3/4 "(70) Weight 2 Lbs. (0.9 Kg) Operating Temperature -40oF to +185oF (-40oC to +85oC) Enclosure Rating NEMA 3R Supply Power 22-28VAC/VDC 15VA maximum, 5VA typical Trigger Temperature 34oF-44oF (1.1oC-6.6oC) Field Selectable Delay Off (Sensor) 2 Minutes Delay Off (Controller) 30-90 Minutes/2-6 Hours Field Selectable Load Contact Capacity 30A @ 24 VAC/100,000 operations minimum at full load Monitor Contact Capacity 24 VDC/VAC 400mA 10W total DS-224 Sensor Controller Part Numbers Typical leadtime for a DS-224 is stock to 1 week. Type Conduit Hub DS - 224 - XXX | 500 - 1/2" NPT 750 - 3/4" NPT For example: A DS-224 with a 1/2" conduit hub would be a DS-224-500 Power and load pigtails are MTW UL 1015 105oC 600V and are 18" in length from base of conduit hub. Unlike our other products, the DS-224 is not UL listed. No voltages used with or internal to the unit exceed 24 VAC/VDC, a voltage level considered nonhazardous by Underwriters Laboratories. Part Number Description DS-224-xxx DS-224 with power and load pigtail set CS-1 Control/Monitor Cable, 18", #22 AWG, 5 Conductor 300V Replacement Parts Part Number Description MG-4 Precipitation Grid Replacement Kit with Sealing Washer/Teflon Tape RP-1 Thermal Probe Assembly RP-23 Fuse Kit, 2A 250Vac 3AG (5) RP-4 Override Switch w\Boot,Cable RP-5-224 Front Cover w\Label, Gasket, 4 Cover Screws
By clicking "Accept All Cookies", you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts.
