14
EASYTOUCH
®
PL4/PSL4 Control System Installation Guide
Temperaturevs.ResistanceData
The EasyTouch PL4/PSL4 Control System use 10k Ohm thermistor sensors. When the solar
sensor is disconnected from the control system, the sensor will read 10k Ohm at 77º F (25ºC). Refer
to the following table for the resistance at other temperatures. An accurate reading should give a
temperature setting that is accurate
Temperature Resistance Temperature Resistance
°C°F Ohm°C°FOhm
-26 -15 139,300 16 60 15,310
-25 -13 130,300 18 65 13,480
-23 -10 118,000 21 70 11,880
-21 -5 100,200 24 75 10,500
-20 -4 97,000 25 25 77 10,000
-18 0 85,350 27 27 80 9,298
-15 5 72,910 29 29 85 8,250
-12 10 62,480 30 30 86 8,056
-9 15 53,640 32 32 90 7,331
-10 14 55,300 35 35 95 6,530
-7 20 46,230 38 38 100 5,826
-5 23 42,300 40 40 104 5,326
-4 25 39,910 41 41 105 5,209
-1 30 34,560 43 43 110 4,663
0 32 32,600 45 45 113 4,367
2 35 30,000 49 49 120 3,757
4.7 40 26,100 50 50 122 3,602
5 41 25,400 52 52 125 3,381
7 45 22,760 54 54 130 3,047
10 50 19,900 55 55 131 2,985
13 55 17,440 57 57 135 2,750
15 59 15,700
3. Run 22 AWG two-conductor cable (included in kit) between the sensor and the enclosure.
Route the cable up through the low voltage raceway to the circuit board.
4. Cut off the excess conductor and the strip conductors ¼ inch. Use waterproof connectors
(provided) to connect the sensor to cable. Insert the conductors into the AIR screw
terminals (J21) on right side of the circuit board. For sensor circuit board screw terminal
location (see diagram below).
J21
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