Delta-Therm DTC120-S Quick Install Manual

Snow MeltingSnow Melting Q.I.G.

leaders in engineered heat trace

Quick Install Guide

Parking

Clearance 9'-6"

Contactors

RID

OTS-F1

Heating Cable Line In

3-wire

Switched

120 V

120 V Control Line Voltage
From Power Distribution Panel

2-wire

4-wire

Low Voltage Wiring from DTC

MS Sensor(s)
Mount Flush
With Pavement Surface

DTC-120

Outdoor
Te mperature
Probe

Power
Distribution
Panel

Heating Cable Load In

DTC120-S

Wired to Enclosed
Contactor Panel

DTC120-S is designed to detect
snow or ice, and automatically
activate contactors for snow melting
cables or mats.

DTC120-S INCLUDES:

DTC Control Panel1.

MS Slab Sensor (1 or 2)2.

OTS-F1 Ambient Thermostat3.

OPTIONAL ITEMS:

RID (Remote Indicator and 4.

Activation Timer)

Enclosed Contactor Panel 5.

1

3

2

5 (Optional)

4 (Optional)

WARNING: This device must be installed by a qualified electrician. All assembly, installation, and test instructions must be followed. Improper

installation can result in property damage, serious injury, and/or death due to electric shock. Call Delta-Therm at 1-800-526-7887 with any
installation or operating questions.

Finished
Install

Enclosed
Contactor
Panel

5 Optional 1 4 Optional

3

2

NOTE: The National Electrical

Code (NEC) requires 30mA
Ground Fault Protection Equip­ment (GFPE) on this system.
Check with all local codes
prior to installation.

DELTA-THERM Corp., P.O. Box 345, Wauconda, IL 60084 [phone] Fax [phone]

Snow Melting Q.I.G. [phone]

MS

1

2

5

4

3

6

1

4

325

TBTBTATA

MS

1

2

5

4

3

6

1

4

325

TBTBTATA

MS

1

2

5

4

3

6

1

4

3

2

5

TBTBTATA

Mounting Points (4)

1

Installing the
DTC120-S
Control Panel

The DTC (NEMA 1) Control
Panel must be installed by a
qualified electrician.

Use as
Ground
with PVC
Pipe

Mounting
Points

2

Installing the
MS Sensors

3/4” Conduit
Back To DTC

Locate the MS slab sensors in
an area most indicative of snow
and moisture exposure. Do not
locate sensors in an area which
may be blocked by snow, or in
the direct path of tires, due to
moisture that can cause false
system activation.

Unroll sensor wire and pull from
sensor housing to DTC
or dry location junction box.

Side View (MS)

3/4” Conduit
Back To DTC

Wire two MS sensors in parallel.

MI Cable

5”

MI Cable

Plan View (MS)

Slab Temp Sensor

6”

Slab Temp Sensor
Inside 3/4” Nipple

3”

3”

Min.
Distance
From
Cable To
Conduit

1

2

5

4

3

6

1

4

325

TBTBTATA

MS

1

2

5

4

3

6

1

4

325

TBTBTATA

MS

3

Wiring the
MS Sensor

black

red

yellow
green

4

Wiring
OTS-F1

TB3

TB4

TB5
TB6

Black
Red
White

Green

3/4” Conduit
Back To DTC

Side View MS

Slab Temp Sensor

Wire two MS sensors in parallel.

Outdoor
Temperature
Probe

leaders in engineered heat trace

Quick Install Guide

OTS-F1

TIMER ON

SYSTEM ON

RESET

TIMER

DELTA-THERM

START

1

2

5

4

3

6

1

4

325

TBTBTATA

MS

MS

OTS-F1

1

2

5

4

3

6

1

4

3

2

5

TBTBTATA

Parking

Clearance 9'-6"

Contactors

RID

OTS-F1

Heating Cable Line In

3-wire

Switched

120 V

120 V Control Line Voltage
From Power Distribution Panel

2-wire

4-wire

Low Voltage Wiring from DTC

MS Sensor(s)
Mount Flush
With Pavement Surface

DTC-120

Outdoor
Te mperature
Probe

Power
Distribution
Panel

Heating Cable Load In

5

Wiring DTC120-S
to Enclosed
Contactor Panel

Neutral TA2, Neutral

Switchleg, TA4

Jumper
TA1 -TA3
(Field
Installed)

Line, TA1

Black
Red
White
Green

OTS-F1

Outdoor
Temperature
Probe

6

Installing and
Wiring RID

Switchleg, (TA4)

Neutral (TA2)

Line (TA1)

OTS-F1

Black
Red
White
Green

Outdoor
Temperature
Probe

Rid

C_DTC_S_Contactor_1009_QIG

DELTA-THERM.COM Toll Free [phone] [e-mail]