snow switch APS-3C
Automatic Snow and Ice Melting System Control
The APS-3C Snow Switch when used with compatible sensors automatically controls snow/ice melting heaters, ensuring minimum operating costs. Typical applications include pavement, sidewalk, loading dock, roof, gutter and down spout snow/ice melting. The APS-3C is interchangeable with earlier APS–3 models. The adjustable hold-on timer continues heater operation for up to 10 hours after snow stops to ensure complete melting. The optional RCU–3 Remote Control Unit can be located where system operation can be conveniently observed. It duplicates many of the controls and indicators on the APS-3C front panel. It is used to clear tracked and drifting snow that may not land on a sensor.
- High limit thermostat
- Relay closure interface
APS-3C Data Sheet
C Series Manual
Snow and Ice Sensor Data Sheet
FEATURES
- Automatic snow/ice melting control
- Operates electrically- and mechanically held contactors
- Energy management computer (EMC) interface
- Accommodates MI, constant wattage and self-limiting heaters
- Multiple sensor capability
- Heater hold-on and test capability
- C-UL-US
- Simple to install and operate
- Low energy costs
- Minimum energy costs
APS-3C | SPECIFICATIONS
| General | |
|---|---|
| Area of use | Nonhazardous locations |
| Approvals |  |
| Enclosure | |
|---|---|
| Protection | NEMA 3R |
| Cover attachment | Hinged polycarbonate cover, lockable |
| Entries | 3 × 1-1/16″ entries |
| Material | Polycarbonate |
| Mounting | Wall mounted |
| Control | |
|---|---|
| Supply | ETI PN 22470: 120 VAC, 50/60 Hz, 35 VA ETI PN 22471: 208-240 VAC, 50/60 Hz, 35 VA |
| Load | ETI PN 22470: 120 VAC, 24 amp max. inductive ETI PN 22471: 240 VAC, 24 amp max. inductive |
| Contact type | Form C |
| Maximum Ratings | Voltage: 240 VAC Current: 24 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. |
| 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 3-wire jacketed cable Up to 2,000′ (609m) using 12 AWG 3-wire jacketed cable |
| High Limit Thermostat | |
|---|---|
| Adjustment range | 40°F to 90°F (4°C to 32°C) |
| Dead band | 1°F (0.6°C) |
| Sensor type | Thermistor network |
| 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) |
ORDERING INFORMATION
| Order Number | Description |
|---|---|
| 22470 | APS–3C Control Panel, 120 VAC |
| 22471 | APS–3C Control Panel, 208/240 VAC |
| Accessories | |
| 21357 | RCU–3 Remote Control (Optional) |
| 19272 | High Temperature Sensor w/ 20′ (6m) lead (Qty 1 included) |
| 22690 | PTS–100 Embedded Temperature Sensor (Optional) |
We're dedicated to our customers
From the front office to the production floor, we go above and beyond to help make your project successful.
We're dedicated to our customers
From the front office to the production floor, we go above and beyond to help make your project successful.