72492 High Limit Sensor 2002-Current

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72492
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72492 High Limit Sensor 2002-Current
72492 High Limit Sensor 2002-Current 72492 High Limit Sensor 2002-Current

Each spa is equipped with a thermistor that is used as temperature sensor. The thermistor is a semiconductor that changes resistance with temperature changes (as the temperature goes up, the resistance goes down). A comparitor circuit then compares the voltage to the set point voltage. If the voltage differs the heating circuit is sent a signal to energize the heater system or teminate the system if voltage is equal to the set point. The set point is the spas default temperature (102°F) unless reset at the control panel's up or down temperature set buttons.

NOTE: BYPASSING A THERMISTOR OR SHORTING THE TERMINALS WILL CAUSE THE SPA HEATER TO SHUT DOWN. NEVER ATTEMPT TO BYPASS OR ELIMINATE A THERMISTOR FROM THE CIRCUIT. TO CHECK THE THERMISTOR COMPARE THE RESISTANCE TO THE THERMISTOR CHART. THE WATER TEMPERATURE AND THERMISTOR SHOULD BE THE SAME.

Cold Weather Start-ups.

In below-freezing climates, technicians and delivery personnel occasionally run into symptoms of electronic high limit tripping when trying to start up a new spa (or a spa that has been stored empty). In the high limit tripped condition, only the circulation pump will operate (the heater, lamp, and jet pump will not operate).

High limit tripping at start up is most common in spas that have been stored outside or in unheated areas. This is because thermistors installed in empty spas are sensitive to very cold weather (in filled spas the warm water keeps the thermistor in its normal operating range). If the temperature of the high limit thermistor is near or below 45 degrees F, its resistance increases significantly. The very high resistance of the cold thermistor is outside of the normal operating range, so the high limit circuit shuts down the spa. A second set of thermistors kept in a warm Envioronment Can be switched out prior to powering up the spa. This will keep the system running until the original thermistor warm up.

HIGH LIMIT SENSOR – Removal:
1. Disconnect power to the spa.
2. Remove the front access panel.
3. Open the control box lid.
4. Unplug the high limit sensor from the control box high limit terminal and remove it from the control box.
5. Trim any zip ties that hold the cords in place.
6. Remove the hi-limit sensor from the clip on the heater.
Installation:
Reverse the removal procedure to install the control sensor in the equipment compartment taking special care to apply insulation to the backside of the control sensor. Failure to replace the insulation around the high limit and heater will result in the possibilities of the spa shutting down during the winter months.
Note: After installation, switch the jet pump to high speed and check spa functions.

72492 High Limit Sensor 2002-Current is for the following models.       

 

Make Model Date Range
Caldera Tahitian 2002-Current
Caldera Niagara 2002-Current
Caldera Geneva 2002-Current
Caldera Cantabria 2009-Current
Caldera Hawaiian 2002-2010
Caldera Kauai 2013-2015
Caldera Moorea 2006-2010
Caldera Salina 2011-2015
Caldera Makena 2013-2015
Caldera Martinique 2013-2015
Caldera Aspire 2004-2008
Caldera Elation 2003-2010

 

 

Specifications

 

 

 

Item Description Part #
1 Kit CBA Advent Orca Cal 76288
2 Kit Control Head Cal 76269
3 Clamp Romex 3/4" 30105
4 Plug Hole 0.875" 36043
5 Bushing Strain Releif 3/8" 30099
6a Kit Pump Cord 14/4 2SPD STRS 72461
6b Kit Pump Cord 14/3 1SPD STRS 72462
7 Strain Releif 3/8" 7k-2 30098
8 Cord Circ Pump 71434
9 Ozone Receptacle 72474
10 Thermistor Hi-Limit 72492
11 Thermistor Control 72493
12 Kit Heater Board Replacement 76071
13 Fuseholder 34506
14 Fuse 2 AMP 250V 34934
15 Program Jumper Shunt .100 36021
16 Kit 12C Comm Hub 8 Port 74150
17 Power Jumper 2 Pin 39192
18 Power Jumper 3 Pin 39193

 

 

Item Decsription Part #
1 Kit CBA Advent Cal 73181
2 Clamp Romex 3/4 30105
3 Plug Hole 0.3/8" 36043
4 Bushing Strain Relief 3/8" 30099
5a Cord Assy Pump 14/4 Flag 60" 72461
5b Cord Assy Pump 14/3 Flag 60" 72462
6 Strain Releif 3/8" 7K-2 30098
7 Cord Circ Pump Replacement 71434
8 Receptacle Assy Ozone 72474
9 Plug Hole 0.50" 36044
10 Thermostor Hi-Limit 72492
11 Thermistor Control 72493
* Kit Heater Board Replacemnet 74618
* Fuse Sloblo 1/2A 250V 5MM X 20MM 37089
* Program Jumper Sgunt .100 36021
* Kit Cable Assy Press Switch 72639
* Fuseholder 34506
* Fuse 2 Amp 250V 34934
* Kit 12C Comm Hub 8 Port 74150

 Item  Description  Part #
 1  CONTROL BOARD,ADVENT ORCA 60HZ  77656
 2  JUMPER, POWER 2-PIN T-BLOCK  39192
 3  JUMPER, POWER 3-PIN T-BLOCK  39193
 4  HEATER RELAY BOARD, ORCA 50/60  77118
 5  STRAIN RELIEF, METAL CLAMP  30105
 6  PLUG, 0.875" HOLE  36043
 7

 STRAIN RELIEF, SMALL CIRC PUMP

STRAIN RELIEF, MEDIUM JET PUMP

30098

30099 

 8  FUSE, 2A 250V SLO BLO  34934
 9  FUSE HOLDER, CONTROL BOX 60HZ  34506
 10  I2C COMM, 5-PORT  74150
 11  THERMISTOR, CONTROL BULLET  72493
 12  THERMISTOR, HI LIMIT ADVENT  72492
 13  JUMPER, PROGRAM 2-PIN  36021
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