Model SST–2
11/07 22804
(800) 234-4239
http://www.networketi.com
4 of 12
Environmental Technology, Inc.
Front Panel Interface
Status indicator
SUPPLY (green) power applied
SUPPLY (green, fl ashing) bad thermistor
HEAT (yellow) call for heat
GFEP (red) ground fault condition
GFEP (red, fl ashing) failed GFEP test
GFEP (red, fl ashing, rapid) GFEP test in progress
Remote Interface
Alarm relay
Isolated SPDT 1 AMP Class 2 contact
Summary alarms
No Power
Ground Fault Condition
GFEP function test failure
Bad or missing Thermistor
Control
Supply voltage
120, 208, 240 or 277 volts, single phase (automatically selected)
Contact type
Two Form A DPST
Maximum Ratings
Voltage: 277 VAC
Current: 30 amps
Temperature Sensor
Set point
40°F (4.4°C)
Dead band
2°F (1°C)
Sensor type
Thermistor network
Circuit type
NEC Class 2
Lead Length
Up to 2,000' (610m) using 12 AWG 2-wire jacketed cable
Up to 500' (152m) using 18 AWG 2-wire jacketed cable
Ground Fault Equipment Protection (GFEP)
Set point
30 mA
Automatic self test
Mode A: Verifi es GFEP function before contactors operate
Mode B: Verifi es GFEP function every 24 hours
Manual test/reset
TEST/RESET switch on front panel
Environmental
Operating temperature
−40°F to 130°F (−40°C to 55°C)
Storage temperature
−67°F to 167°F (−55°C to 75°C)
Installation
Unpacking
Immediately inspect the packing material for damage. Unpack the SST–2,
taking care not to damage the packaging material. Save the packaging material until
normal operation has been established. If the unit must be returned, take care to
ensure that it is repackaged as it was received.
Packing List
22744
SST–2 Freeze Protection Thermostat
19272
Temperature Sensor
22804
SST–2 Installation and
Operation Manual
