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Model GIT We manage heat ®
®
Model GIT
®
3A
Gutter Snow and Ice Melting Control
Part Number 19554
Installation and Operation Manual
WARNING
Hazard of electrical shock.
Follow all safety procedures.
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 Article 110.3B,
Article 210.8(A)(3), Article 250.4(A), Article 426.4 & 28, Article 725.55 and all other applicable
sections of the National Electric Code (NFPA 70), local electrical codes, and any third party
standards.
Only qualified personnel trained in electrical equipment service should perform maintenance on
heating and control equipment.
Environmental Technology, Inc.
1850 N Sheridan Street
South Bend, Indiana 46628
(574) 233-1202 or (800) 234-4239
FAX (574) 233-2152 or (888) 234 4238
www.networketi.com DISCLAIMER
Environmental Technology, Inc. makes no representations or warranties, either expressed or implied, with
respect to the contents of this publication or the products that it describes, and speci cally disclaims any
implied warranties of merchantability or tness for any particular purpose. Environmental Technology,
Inc. reserves the right to revise this publication and to make changes and improvements to the products
described in this publication without the obligation of Environmental Technology, Inc. to notify any person
or organization of such revisions, changes or improvements.
Copyright © 2008 Environmental Technology, Inc. All rights reserved. No part of this manual may be reproduced or trans-
lated in any form or by any means, electronic or mechanical including photocopying and recording, for any purpose without
the express written consent of Environmental Technology, Inc.
The ETI logo, We Manage Heat and GIT are reg is tered trademarks of En vi ron men tal Technology, Inc.
Printed in USA
PN19591 rev e 05/08 Description
The computerized UL and CUL Listed GIT3A automatically controls gutter and downspout snow and ice
melting heaters. It is safety tested to Standard 873 for Temperature Indicating and Regulating Equipment.
The GIT3A consists of sensor and control assemblies connected by a 12' (3.6 m) cable. The sensor meets the
NEC (National Electrical Code) low voltage Class 2 requirement for wet locations.
Supply Voltage Options
The GIT3A provides jumper-selected supply voltage options of 120, 208 through 240, and 277 volts. Selecting
the proper supply voltage is very important. An incorrect setting may destroy the GIT3A or render it inoperative.
The GIT3A operates from the heater supply voltage.
Relay (Contactor) Contact Ratings
The relay (contactor) provides a Form A (SPST) contact rated for up to 26 amp AC heater loads at voltages at
or below 277 volts.
Safety
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 Article 110.3B, Article 210.8(A)(3),
Article 250.4(A), Article 426.4 & 28, Article 725.55 and all other applicable sections of the National Electric
Code (NFPA 70), local electrical codes, and any third party standards. Follow the installation instructions
contained herein and those provided by the heater manufacturer. If you have questions concerning the installation
contact Customer Service for assistance.
Use a GFEP circuit breaker on each branch circuit connected to the snow and ice melting system.
Clearly label each circuit breaker with its function. This is vitally important when there is more than one point of
disconnect. The GIT3A often serves as a pilot duty relay for operating high current single or three phase contactors
in commercial applications.
Make certain that the heater shield is properly grounded as required by the NEC.
Installing the Sensor
Mount the sensor as low as possible in the gutter about a foot upstream of the downspout. For proper operation,
the heating cable must be close to but not touching the sensor. A separation of
1
/
2
" (1.3 cm) to 1" (2.5 cm) is ideal.
Orient the sensor with the temperature sensor facing upstream and the moisture sensor toward the down spout. Use
the supplied plastic mounting straps and gasketed #10 fasteners to secure the sensor in the gutter via
3
/
16
" drilled
holes through the gutter. See Figure 1. Installing the Control
Lethal voltages are present within the control enclosure during operation. Some installations may require
two points of disconnect. Tag all circuit breakers off during installation or service.
The GIT3A comes factory set for 277 volt operation. A jumper located in the control must be changed for
120 or 208 through 240 volt operation. See Figure 2. An incorrect setting may destroy the GIT3A or render it
inoperative.
The control comes connected to the sensor with 12 feet (3.6 meter) of three conductor cable. The snow and ice
melting heater leads, supply leads and sensor leads terminate in the control enclosure. Locate the control enclosure
outdoors at a place convenient for the wiring connections. Position the control housing so that the sensor cable entry
is positioned at the bottom, supply leads enter at the bottom and heater leads exit to the left. Failing to orient the
housing correctly may cause moisture collection in the housing resulting in equipment damage.
For line supply and load connections use #10 AWG or larger wires rated for at least 194° F (90° C). Figure 4,
5 and 6 show wiring for typical 120/240 volt residential application, unbalanced 208 or 277 3-phase application and
pilot duty application.
Jam Nut
Nut
Sensor
Gutter
Nylon Clamp
Drill
3
/
16
" Hole
2 Places
O-ring
Screw
Figure 1. Sensor mounting Environmental
T
echno
Environmental
T
echno
South
Bend
,
I
ndiana
Sout
h
Bend
,
Indiana
NAME
NAME
Line / Line 1
Equipment Ground
Neutral / Line 2
277V Connection Shown
120V
Connection
208V thru 240V
Connection
120V 208/240V 277V
120V 208/240V 277V
120V 208/240V 277V
Conduit
12' Jacketed Cable
Figure 2. Selecting Voltage Figure 3. Mounting Dimensions
5.56"
(141.2mm)
.81"
(20.6mm)
Ambient Air
Temperature
Sensor
1.12"
(28.5mm)
1.50"
(38.1mm)
Heated Moisture
Sensing Grid
12' (3.6m) Jacketed
3 Conductor #18 AWG Cable
Removable Mounting Clamp
Clearance for #10 Screw
4
1
/
4
"
(108mm)
7
7
/
16
"
(189mm)
3/4"(21mm)
Conduit Entry Figure 4. Typical 120/220 Volt Residential Applications
Figure 5. Unbalanced 208 or 277 3-Phase Applications
Figure 6. Pilot Duty Applications Post Installation Tests
Thoroughly check the system before placing it in service. Our experience shows that installation errors cause the
majority of problems. Frequently encountered problems include wiring errors and improper waterproofing. Simple electrical
tests and visual inspections identify these problems.
Checking the sensor in the field is not practical. Verifying its operation requires special test equipment that is
neither portable nor commonly available.
Checking the operation of the control requires a clamp-on AC ammeter. Follow the steps below to verify
operation. The gutter and downspout must be dry while doing these tests.
1. Remove power from the snow and ice melting system. There may be two points of disconnect.
2. Clamp the ammeter to one of the yellow leads in the control housing.
3. Locate the probe connections in the low voltage compartment. Remove the wire nuts from the black leads
and white leads. Make certain the same color wires remain twisted together and that the two black and
two white wires dont touch electrically.
4. Apply power to the snow and ice melting system. This may require two points of connection. Use care.
Lethal voltages are now present within the control enclosure. The ammeter should read approximately
zero amps.
5. Remove power from the snow and ice melting system. There may be two points of disconnect.
6. Using a wire nut, temporarily connect the two black and two white wires together.
7. Apply power to the snow and ice melting system. This may require two points of connection. Use care.
Lethal voltages are now present within the control enclosure. The ammeter should read the nominal
heater current.
8. Immediately remove power from the snow and ice melting system. There may be two points of
disconnect.
9. Make certain that the two black probe leads are securely connected together electrically. Secure these
wires with a wire nut.
10. Make certain that the two white probe leads are securely connected together electrically. Secure these
wires with a wire nut.
Operating Instructions
The GIT3A does not require user intervention during normal operation.
Maintenance
Although the GIT3A does not require routine maintenance, make certain that the gutters and down spouts are
cleaned each fall to ensure efficient gutter and down spout snow and ice melting system efficiency.
For technical help, questions or comments concerning this product or any o