WarmlyYours SCV-DUAL User Manual

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.

If you have any technical questions related to this control or the installation of
any of our radiant heating systems, please call our 24/7 installation team at
[phone] or visit our website at www.WarmlyYours.com.

WarmlyYours
Technical Team

Installation Support • No Nonsense™ Warranty •[phone] • www.WarmlyYours.com

®

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
[phone] or [phone]
FAX [phone] or [phone]
http://www.networketi.com/

24782 Rev. A 03/13 [phone] http://www.networketi.com Environmental Technology, Inc.

Snow Switch® Model LCD–8 Aerial Snow Controller, 100 – 240 VAC

2 of 14 Environmental Technology, Inc.

24782 Rev. A 03/13[phone]http://www.networketi.com

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.

Electrical Shock / Fire Hazard

Even when the snow melting elements are disconnected, as long as the circuit
breaker is on and power is running to the unit, voltage is still being applied to the
system’s yellow leads. Therefore, never touch the ends of the yellow leads or let the
two leads touch each other. Do not let the two yellow leads contact any component
inside the unit.

Any installation involving electric heater wiring must be grounded to earth to
protect against shock and fire hazard. Suitable ground fault detection and interrupting
systems must be in use at all times to reduce shock and fire hazard and to protect
equipment.

Electric wiring to heating elements must be installed in accordance with National
Electrical Code (NEC) requirements and all other local and applicable electrical codes
and any third party standards. Follow the installation instructions contained herein and
those provided by the heater manufacturer.

Use a GFEP (Ground Fault Equipment Protection) circuit breaker on each branch
circuit connected to the ice melting system. Clearly label each circuit breaker with its
function. This is vitally important when there is more than a single point of disconnect.

Size the circuit breaker in accordance with the size of the expected load. The
maximum current load for the LCD-8 is 16 Amp resistive. This product is intended for
use in residential or light commercial applications.

Make certain that the heater shield is properly grounded. Failure to do so may
result in damage to the equipment or fire.

Following installation and prior to beginning system operation, refer to and perform
the Post-Installation Tests (page12) described in this manual.

Additional Information

More information is made available regularly through our website,
www.networketi.com. Please visit us online for Data Sheets, Manuals, White Papers,
technical articles, and more. The most current and up to date version of this and
every other manual for our products can be found in Acrobat (PDF) format to view
online or to print. This is to assist you in installing and using our products to the
best effect possible. If you have any comments about this or any other product from
Environmental Technology, Inc., please contact us.

Contacting Environmental Technology, Inc.

For assistance, contact Customer Service. Office hours are from 8:00 AM until
5:00 PM ET.

Voice: [phone] (USA and Canada) or [phone] (elsewhere)

Fax: [phone] (USA and Canada) or [phone] (elsewhere)

E-mail: [e-mail]

Mail: Environmental Technology, Inc.

1850 North Sheridan Street
South Bend, IN 46628

24782 Rev. A 03/13 [phone] http://www.networketi.com 3 of 14Environmental Technology, Inc.

Snow Switch® Model LCD–8 Aerial Snow Controller, 100 – 240 VAC

General

LCD-8 Overview

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. The adjust­able hold-on period, 3 hours default, continues heater operation after snow stops to
ensure complete melting. The LCD–8 controller includes an internal magnetic reed
switch used for manual heater cycling and configuring the controller’s operational
temperature set point and hold-on time.

The LCD–8 controller is available as a model which operates from either an
automatic selecting 100VAC – 240VAC or as a model which operates from 24VAC.
These two voltage options combine with the configurable hold-on time and tem­perature set point to meet the need of a wide number of applications using just two
part numbers.

Figure 1. LCD-8

It controls heater loads up to 16 amps resistive or 3 amps inductive. The
operating temperature range extends from –40°F to 140°F (–40°C to 60°C). The
redesigned, patent pending, rugged polycarbonate enclosure provides excellent
protection at temperature extremes, while allowing snow to shed to prevent iglooing
over the moisture sensor.

The internal magnetic reed switch allows for both configuration and manual
heater operation without the need for external switches—which are susceptible to
damage—or the need to open the enclosure.

Verifying system functionality after installation or when troubleshooting used
to require spray circuit cooler or ice for controller activation. The Sno-Test™ feature
eliminates this need by performing a self-test after power application and operating
heaters in a unique pattern for a few seconds. Reading the test results takes only an
AC voltmeter or clamp-on ammeter.

A configurable snow sensor with two light-emitting diode (LED) indicator
lamps (Figure 2), the LCD-8 features a hold-on timer which allows its system to
operate to a drier surface after melting snow.

 • The hold-on timer can be congured for off, 1 hour, 3 hours or 5 hours.

The operating temperature can be configured for none (precipitation sensor),

36°F, 38°F or 40°F.

 • The low-temperature lockout (17°F), which disengages unit operation, can be

enabled or not.

 • Default conguration: 38°F operating temperature; 3 hour hold-on; no lockout.
 • The LCD-8 uses an internal magnetic switch. The user swipes a magnet

externally across this switch to start a hold-on cycle or to terminate a running

hold-on cycle.

This switch may also be used to reconfigure the unit, or to view the current

configuration.

 • The green LED, ordinarily on steady, blinks to indicate a concern with the unit.

This LED is also used in the LCD-8’s configuration process.

 • The yellow LED indicator is lit whenever the output relay is powered (“on”).
 • There is an initialization period where the heaters are tested.

green LED

yellow LED

Figure 2. LCD-8 LEDs

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Ambient Air
Temperature
Sensor

24782 Rev. A 03/13[phone]http://www.networketi.com