Dear Customer, Thank you for purchasing your radiant heating control from WarmlyYours. WarmlyYours is dedicated to making comfort easy and we continually strive to provide our customers with the best controls in the industry. WarmlyYours sells this product under part number SCV-DUAL. The control’s manufacturer identifies this same part with the model number of LCD-8 in all the documentation provided with the control.
MANUAL ® We Manage Heat ® Automatic Snow/Ice Melting System Controller SNOW SWITCH® MODEL LCD–8 100–240 VAC Installation and Operation Manual Environmental Technology, Inc. 1850 N Sheridan Street South Bend, Indiana 46628 (574) 233-1002 or (800) 234-4239 FAX (574) 233-2152 or (888) 234-4238 http://www.networketi.com/ 24782 Rev. A 03/13 (800) 234-4239 http://www.networketi.com Environmental Technology, Inc.
Snow Switch® Model LCD–8 Aerial Snow Controller, 100 – 240 VAC 2 of 14 Environmental Technology, Inc. http://www.networketi.com (800) 234-4239 24782 Rev.
Snow Switch® Model LCD–8 Aerial Snow Controller, 100 – 240 VAC Safety Make all electrical connections in compliance with the National Electrical Code (NFPA 70) and local electrical code. If you have questions concerning the installation or application, contact Customer Service. Abnormal Odor or Smoke In the event of smoke or a burning or abnormal odor, immediately interrupt power to the unit by unplugging the unit or by turning off the circuit breaker protecting the unit.
Snow Switch® Model LCD–8 Aerial Snow Controller, 100 – 240 VAC General LCD-8 Overview Figure 1. LCD-8 The Snow Switch® Model LCD–8 (Figure 1) is a configurable aerial snow melting system controller which makes automatic snow melting a cost-effective alternative in even the smallest applications. Heaters operate at temperatures below the LCD-8’s configurable set point, 38°F (3.3°C) default, only when required.
Snow Switch® Model LCD–8 Aerial Snow Controller, 100 – 240 VAC UNPACKING THE LCD-8 Immediately upon receipt, inspect the container and packing material for any noticeable damage. Unpack the unit, taking care not to damage the packing materials. Confirm all components noted in “Packing List” above are included. Save the shipping container and related materials until normal operation has been established. If the unit must be returned, take care to ensure that it is repackaged as it was received.
Snow Switch® Model LCD–8 Aerial Snow Controller, 100 – 240 VAC Installation With user-supplied hardware, mount the LCD-8 securely in an upright position (sensor grid at top; see Figure 3) in a clear and open area typical of the area to be melted, either above the roof line or removed from the building and exposed to, rather than protected from, falling snow. Avoid overhead trees, shrubs, wires, eaves, etc., and falling or blowing debris. Avoid vehicle and foot traffic. Do not create a safety hazard.
Snow Switch® Model LCD–8 Aerial Snow Controller, 100 – 240 VAC Install in accordance with the requirements of all applicable electrical and building codes and regulations. Ensure that all conduit and cable terminations are watertight. NEC Article 426.28 requires Equipment Ground Fault Protection (GFEP) for Ice and Snow Melting Equipment. This functionality is not provided as part of this controller and shall be provided as part of the overall system.
Snow Switch® Model LCD–8 Aerial Snow Controller, 100 – 240 VAC Operation Initialization Sequence Upon power up, the LCD-8 performs an initialization sequence, allowing a user or technician to verify its operation. First, the external relay energizes for ten seconds. Next, the relay powers off and the cup heaters energize for ten seconds. Finally, both are off for another ten seconds. During this time, the green LED blinks slowly—one (1) second on, one (1) second off. Normal operation follows.
Snow Switch® Model LCD–8 Aerial Snow Controller, 100 – 240 VAC Special Case: Hold-On Time is 0 For the special case that only occurs with a manual swipe when the hold-on time is set to zero (0), the heater operates for at least one hour, even if there is a snow condition. In terms of a strict state description in this one case, a snow condition does not cause the system to enter the snow state, but rather to stay in the hold-on state. If the snow remains after the one hour, the heater remains energized.
Snow Switch® Model LCD–8 Aerial Snow Controller, 100 – 240 VAC GREEN LED PULSE PATTERN Prior to learning how to change the configuration of the LCD–8, it is first necessary to understand how the device communicates with the user; see Table 1. As there is no display on the unit, the only means of communicating with the device is to carefully observe the pulse pattern of the green LED.
Snow Switch® Model LCD–8 Aerial Snow Controller, 100 – 240 VAC LCD-8 Configuration The user is able to configure three operating parameters on the Snow Switch Model LCD–8. These are: • the hold-on time in hours; • the temperature set point in degrees Fahrenheit; and • low temperature lock-out operation. The definitions of each of these parameters, as well as how to determine their current setting and how to change those settings, will be explained in this section of the manual.
Snow Switch® Model LCD–8 Aerial Snow Controller, 100 – 240 VAC To Enter the Configuration Process • Hold the magnet to the switch for 3 seconds • The green LED will go off • Remove the magnet • Process begins The unit will flash the values of the three Field parameters in order, repeatedly.
Snow Switch® Model LCD–8 Aerial Snow Controller, 100 – 240 VAC Post–Installation LCD-8 Test Most problems result from installation errors. Before testing, verify that unit is properly installed. 1. Connect power to snow melting system. Wait 15 seconds; system should not actuate. 2. Using ice water or other cooling agent, cool ambient air temperature sensor to below 38°F (3.3ºC); system should not actuate. Apply moisture to moisture sensing grid. System should actuate in less than 15 seconds. 3.
Snow Switch® Model LCD–8 Aerial Snow Controller, 100 – 240 VAC ORDERING INFORMATION Order Number 24619 24781 18703 24782 Description LCD–8 Aerial Snow Controller, 100–240 VAC (QTY 1) LCD–8, 24VAC Red Wire Nuts (QTY 4) LCD–8 Manual (QTY 1) LIMITED WARRANTY ETI’s two year limited warranty covering defects in workmanship and materials applies. Contact Customer Service for complete warranty information. DISCLAIMER Environmental Technology, Inc.
