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Wet Process Heating and Cooling Equipment |
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THE PROTECTOR I SERIES
The Protector I over temperature control system utilizes a heat sensitive fuse to detect overheat conditions. The fuse, placed inside a thermowell, positioned in contact with the heater sheath, will cut power to the heater in the event of low liquid level.
THE PROTECTOR II AND III SERIES
The Protector II and Protector III systems provide the same reliable over temperature protection as the Protector I; however, the control systems feature a heat sensing thermostat. Should the tank’s liquid level drop to a preset overheat point, the thermostat will trip and an audible alarm will sound, cutting power to the heater. This eliminates dangerous operating conditions. After filling the tank, the immersion heater can be quickly made operational by pushing the reset button on the control to restore power. Protector III is designed for flexible lead or high temperature fluoropolymer (PTFE) heater applications only. DO NOT wire PIII or PTIII devices directly to power or heater load as a dangerous short circuit will result with irreparable damage to the heater. Please refer to wiring diagrams for proper installation.
HEATER THERMAL PROTECTION CHART
| PROTECTOR TYPE | TEMP
TANK °F (°C) |
METAL OVER-THE-SIDE AND FLANGED |
METAL L-SHAPED |
METAL FLEX RISER |
QUARTZ | OVER-THE-SIDE FLUORO- POLYMER |
L-SHAPED FLUORO- POLYMER |
FLEX RISER FLUORO- POLYMER |
| Replaceable | to
180°F (82°C) |
PI (White, 3936) |
PLI (White, 3710) |
--- | PQI (White, 3936) |
PTI* *(to 190°F) |
PTLI* *(to 190°F) |
--- |
| 180-230°F (82-110°C) |
PIM (Blue, 2924) |
PLIM (Blue, 3712) |
--- | PQIM (Blue, 2924) |
--- | --- | --- | |
| 230-300°F (110-150°C) |
PIH (Red, 3714) |
PLIH (Red, 3713) |
--- | --- | --- | --- | --- | |
RESETTABLE PROTECTORS REQUIRE ADDITIONAL CONTROL COMPONENTS (CONSULT FACTORY) |
||||||||
| Resettable | to
180°F (82°C) |
PII (White, 3804) |
PLII (White, 3804) |
PLII (White, 3804) |
PQII (White, 3804) |
PTII* *(to 190°F) |
PTLII* *(to 190°F) |
PIII |
| 180-230°F (82-110°C) |
PIIM (Blue, 4047) |
PLIIM (Blue, 4047) |
PLIIM (Blue, 4047) |
PQIIM (Blue, 4047) |
PTIII (190-210°F) (88-99°C) |
PTLIII (190-210°F) (88-99°C) |
PIII | |
| 230-300°F (110-150°C) |
PIIH (Red, 2805) |
PLIIH (Red, 2805) |
PLIIH (Red, 2805) |
--- | PIII (210-250°F) (99-121°C) |
PIII (210-250°F) (99-121°C) |
PIII | |
Color designations indicate lead wire color. Four digit numbers indicate PCN.
Lowest temperature replaceable style Protector standard unless otherwise designated.
VOLTAGE AVAILABLE (MOST HEATERS AND
CONTROLS)
Voltages are designated in Process Technology model numbers as follows:
1=120
volt 208=208 volt
2=240 volt 380-380 volt
4=480 volt 415=415 volt
600=600 volt
Please specify voltage and single or three phase when ordering. Consult factory for other voltages.
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