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You searched for: ETI Snow Switch Model APS-4C. Automatic Snow/Ice Melting System Control integral GFEP
Results Displayed: 1 - 12 of 12

ETI Snow Switch Model APS-4C. Automatic Snow/Ice Melting System Control integral GFEP


Description


The APS–4C Snow Switch when used with one, or more, compatible sensors automatically controls snow/ice melting heaters for minimum energy costs. Applications include pavement, sidewalk, loading dock, roof, gutter and down spout snow/ice melting in commercial and industrial environments. The APS–4C is interchangeable with the earlier APS–4.

The adjustable hold-on timer continues heater operation for up to 10 hours after snow stops to ensure complete melting. The optional RCU–4 Remote Control Unit can be located where system operation can be conveniently observed. It duplicates many of the APS–4C front panel functions.

The APS–4C provides advanced patented and patent pending ground fault equipment protection (GFEP) as required by the USA and Canadian National Electric Codes. The GFEP automatically tests itself every time the heater contactors operate and once every 24 hours. The trip current can be set at 60 or 120 ma via a DIP an internal switch or retained at the 30 ma default value. As an aid to troubleshooting heater ground faults, the APS–4C provides an output that can indicate the ground current on a service person’s portable DVM.

The calibrated 40°F to 90°F (4°C to 32 °C) high limit thermostat prevents excessive temperatures when using constant wattage and MI heaters. It also permits safe testing at outdoor temperatures too high for continuous heater operation. The temperature sensor is included.

The APS–4C provides a complete interface for use in environments supervised by an energy management computer (EMC). This feature can also be used for general purpose remote control and annunciation.

All sensor and communications wiring is NEC Class 2. This simplifies installation while enhancing fire and shock safety. The APS–4C can interface up to six sensors from the CIT–1 product family. More sensors provides superior performance by better matching the controller to site performance requirements.


Specifications

General

Area of use
Nonhazardous locations

Approvals
cULus


Enclosure

Protection
NEMA 3R

Cover attachment
Hinged polycarbonate cover, lockable

Entries
1 × 1-1/16" entry (top) for NEC Class 2 connections
2 × 1-11/16" entries (bottom) for supply and load power, except 277 VAC single phase
2 × 1-1/16" entries (bottom) for supply and load power, 277 VAC single phase only

Material
Polycarbonate

Mounting
Wall mounted


Control

Supply
ETI PN 22472: 208-240 VAC, 35 VA, 3-phase 50/60 Hz
ETI PN 22473: 277 VAC, 45 VA, single phase 50/60 Hz
ETI PN 22475: 277/480 VAC, 45 VA, 3-phase 50/60 Hz
ETI PN 22476: 600 VAC, 50 VA, 3-phase 50/60 Hz

Load
ETI PN 22472: 208-240 VAC, 50 amp max. resistive
ETI PN 22473: 277 VAC, 40 amp max. resistive
ETI PN 22475: 277/480 VAC, 50 amp max. resistive
ETI PN 22476: 600 VAC, 50 amp max. resistive

Contact type
3 Form A

Maximum Ratings
Voltage: 600 VAC
Current: 50 amps

Heater hold-on timer
0 to 10 hours; actuated by snow stopping or toggle switch

System test
Switch toggles the heater contact on and off. If temperature exceeds high limit, heater cycles to prevent damage.


Ground Fault Equipment Protection (GFEP)

Set point
30 mA (default); 60 mA and 120 mA selectable by DIP switch

Automatic self-test
Mode A: Verifies GFEP function before contactors operate
Mode B: Verifies GFEP and heaters every 24 hours

Manual test/reset
Toggle switch provided for this function

Maintenance facility
DC output proportional to ground current provided for troubleshooting the heater system


Snow/Ice Sensors

Sensor type
Up to 6 sensor from the CIT–1 product family

Circuit type
NEC Class 2


Lead length
Up to 500' (152m) using 18 AWG 2-wire jacketed cable
Up to 1,000' (504m) using 12 AWG 2-wire jacketed cable


Energy Management Computer (EMC) Interface

Inputs
OVERRIDE ON (10 ma dry switch contact)
OVERRIDE OFF (10 ma dry switch contact)

Outputs
SUPPLY (10 ma dry switch contact)
SNOW (10 ma dry switch contact)
HEAT (10 ma dry switch contact)
HIGH TEMP (10 ma dry switch contact)
ALARM (10 ma dry switch contact)


Environmental

Operating temperature
-40°F to 160°F (-40°C to 71°C)

Storage temperature
-50°F to 180°F (-45°C to 82°C)
















Data Sheet
Item CodeDescriptionVendorQuantity
ETI10001
CIT-1 Aerial Snow Sensor
ETI (Environmental Technology Inc.) General Purpose Snow Sensor used with any APS or EUR series control panel
ETI (Environmental Tech.)
ETI11351
GIT-1 Gutter Ice Sensor
ETI (Environmental Technology Inc.) P/N 11351 - Gutter Mounted Ice Sensor. Automatic Gutter Deicing Controls Operating Costs with APS-3C or APS-4C Control Panel
ETI (Environmental Tech.)
ETI19272
19272 Temperature Sensor
ETI (Environmental Technology Inc.) Ambient High Temperature Sensor with 20 Foot Lead for use with SST-2, SST-3, EUR-5A, APS-4C, SC-40C, APS-3C & GPT-3
ETI (Environmental Tech.)
ETI21358
RCU-4 Remote Control Unit
ETI (Environmental Technology Inc.) Flush or surface mount remote control & indication of Snow/Ice Melting Controllers (for use w/ GF Pro,APS-4C,SC-40C)
ETI (Environmental Tech.)
ETI22472
APS-4C 208-240V Snow Melting Control
ETI (Environmental Technology Inc.) Snow Switch. Automatic Snow/Ice Melting System Control - 208-240 VAC Three Phase, UL / CSA - Order No. 22472
ETI (Environmental Tech.)
ETI22473
APS-4C 277V Snow Melting Control
ETI (Environmental Technology Inc.) Snow Switch. Automatic Snow/Ice Melting System Control, 277 VAC SinglePhase, UL / CSA
ETI (Environmental Tech.)
ETI22475
APS-4C 277/480V Snow Melting Control
ETI (Environmental Technology Inc.) Snow Switch. Automatic Snow/Ice Melting System Control, 277/480 VAC Three Phase, UL / CSA - Order No. 22475
ETI (Environmental Tech.)
ETI22476
APS-4C 600V Snow Melting Control
ETI (Environmental Technology Inc.) Snow Switch. Automatic Snow/Ice Melting System Control, 600 VAC Three Phase, U-L / CSA - Order No. 22476
ETI (Environmental Tech.)
ETI22477
SC-40C Satellite Contactor 208-240V
ETI (Environmental Technology Inc.) Snow/Ice Melting Satellite Contactor. Modular Snow/Ice Heater Control System - NEMA3R - modular control system - GFEP built in-208-240v 3phase-50 amp contacts
ETI (Environmental Tech.)
ETI22478
SC-40C Satellite Contactor 277v 1ph
ETI (Environmental Technology Inc.) Snow/Ice Melting Satellite Contactor. Modular Snow/Ice Heater Control System -277v-1ph-UL-csa listed
ETI (Environmental Tech.)
ETI22480
SC-40C Satellite Contactor 277/480V 3ph
ETI (Environmental Technology Inc.) Snow/Ice Melting Satellite Contactor. Modular Snow/Ice Heater Control System - U-L/CSA P/N 22480
ETI (Environmental Tech.)
ETI22481
SC-40C Satellite Contactor, 600 VAC
ETI (Environmental Technology Inc.) Snow/Ice Melting Satellite Contactor. Modular Snow/Ice Heater Control System - Three Phase, U-L / CSA
ETI (Environmental Tech.)