43
Installation
Note: It is good practice to use a power line filter or to connect the controller to a different branch
circuit to reduce the chance of electrical transients.
4.9.1.1 AWRS power connections
Danger
Electrocution hazard. If installed outdoors or in any wet or potentially wet location,
a Ground Fault Circuit Interrupter (GFCI) is required for the sampler. If the sampler
is installed outdoors, over-voltage protection is required.
Important Note: This product is not intended for use with a split-phase (3-wire, single-phase,
mid-point neutral) AC power system. Use this product only with a 3-wire (Hot/Neutral/Ground)
polarized AC power system. Be sure that access to the power cord plug is not blocked or obstructed.
The AWRS sampler is not provided with a power switch. The cord plug serves as the local
disconnect.
• The AWRS sampler is suitable for outdoor use. The 900MAX controller gets its power
directly from the AWRS sampler.
• The mains power cord for 115VAC samplers is equipped with a NEMA 5 15P plug for
standard North American outlets. The mains power cord for 230VAC samplers is
equipped with an EU 1-16P plug for standard CEE-7/7 European outlets. If you have
other types of outlets that supply compatible AC power, contact a trained electrical
technician to connect the power cord with a locally-purchased plug, in accordance
with the local safety requirements.
• All AC mains power connections require a 15A (max) circuit breaker and a good earth
ground for safety and performance.
• Check the power source to make sure that it satisfies the AC power requirements of
the sampler.
Figure 21 Sampler pump–time on vs. time off at 50 ºC (122 ºF)
1 Time (in minutes) when the pump must stay off 3 Time (in minutes) when the pump is on continuously
2 Example—if the pump is on for 5 minutes, the pump must stay off for 15 minutes before the next sample cycle
Goodnal STP ST041 Pre Treatment (Sigma 900 MAX All Weather Refrigerated Sampler) Vendor Manual
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