Data Sheet

ManualsBrandsDanfoss ManualsHydronic ControlsSnow Melting System Controller, 24V Low Voltage

Data sheet ETS

Controller For Snow Melting Systems

VDRKA122 © Danfoss 12/10

ETS is a 24 volt snow melting controller capable

of switching an outdoor heating system on/oﬀ

based on temperature and precipitation. Snow

melt controller applications can include snow

removal in walkways, steps, driveways, garage

entrances, gutters, loading platforms or other

locations where ice and snow accumulation is

a problem. ETS detects outdoor temperature,

ground temperature, and moisture, and

energizes electrical relays when snow or ice

occurs. The system’s heat source can be either

hydronic or electric heating cables (with the use

of an external relay).

Features:

• Electronic on/oﬀ control

• Detects moisture and temperature, or

temperature only

• Choice of ground, gutter, or outdoor sensor

• Several sensors can be connected to the

controller

• Selection of either temperature or

temperature/moisture activation of

controller

Application:

Ordering Information:

Code No. Description

ETS-3551 ETS-3551 Snow melting system controller, 24V low voltage version

ETOG-550 ETOG-550, Ground sensor for detection of slab temperature and moisture,

33ft (10m) cable

ETSR5500 ETSR5500, Gutter sensor for detection of moisture, 33ft (10m) cable

ETF-744/99 ETF-744/99, Outdoor sensor for detection of temperature

Summary of content (4 pages)

PAGE 1
Data sheet ETS Controller For Snow Melting Systems ETS is a 24 volt snow melting controller capable of switching an outdoor heating system on/oﬀ based on temperature and precipitation. Snow melt controller applications can include snow removal in walkways, steps, driveways, garage entrances, gutters, loading platforms or other locations where ice and snow accumulation is a problem. ETS detects outdoor temperature, ground temperature, and moisture, and energizes electrical relays when snow or ice occurs.
PAGE 2
Data sheet Technical Data: ETS Controller For Snow Melting Systems ETS-3551 Snow/Ice Melting Controller Mounting Interior wall surface Dimensions 3.4” x 2.1” x 2.3” (L x W x D) Supply voltage 24 Vac ±10% Output relays 1 relay: 10-A, (potential free contacts) On/Oﬀ diﬀerential 0.6°F (0.
PAGE 3
Data sheet ETS Controller For Snow Melting Systems Function: The diﬀerent sensors ETOG, ETSR and ETF sensors are wired to the controller to provide the feedback for the controller Settable Temperature for Activation of Controller: The large adjustable knob sets the temperature at which the controller would start the system. This scale adjustment is adjustable from 32° to 41°F (0° to 5°C).
PAGE 4
Data sheet Dimensions: ETS Controller For Snow Melting Systems ETOG Sensor 2.4” Green Yellow Brown Grey White Screen 1.25” ETSR Sensor 4.15” 1.2” Green Yellow Brown White Screen 1.2” 3.4” (86mm) 2.4” (62mm) 1.8” (45mm) ETS Controller 2.3” (58mm) 1.1” (29mm) 0.7” (19mm) 0.4” (10mm) 2.3” (58mm) Danfoss can accept no responsibility for possible errors in printed materials and reserves the right to alter its products without notice.