Great Water, Inc.
14 Arsene Way, Fairhaven, MA 02719
207-729-8500
info@great-water.com
Carel IR33S Electronic Thermostat Instructions
Installation –Wiring Diagram
Wiring
• Power supply, normally the same as the compressor power supply, is connected to terminals
6 & 7. Polarity is not important 18 gauge wire may be used. The power supply must be
protected by a breaker or a fuse.
• The sensor wires are connected to terminals 8 & 10. Polarity is not important.
• Thermostat terminals 2 & 3 connect to terminals "C" & "T" on the compressor controller.
Thermostat Sensor mounting
The sensor must be mounted in the refrigerated cabinet so that it senses the average air
temperature. It does not attach to the evaporator like a mechanical thermostat. It is best
installed at mid height, on a wall or divider that does not have the evaporator mounted on it.
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