Hayward Aqua Solar GL-235 Model: GL-235 - Page 2

Description The GL-235 is a differential temperature control for solar heating of pools, spas, and hot tubs. It provides differential temperature control with an adjustable, calibrated water temperature high limit. Automatic nocturnal cooling (for pools that overheat in hot climates) and recirculate freeze protection functions can be enabled/disabled via internal jumpers. Input power can be either 115 or 240 VAC. The output controls a 24VAC automatic valve actuator. For older systems with 12VAC valves, an internal jumper can be moved to select 12VAC output operation. The GL-235 also has a high voltage output for controlling a filter pump or booster pump. Specifications Power: 105-130VAC, .5A 50/60Hz. or 195-250VAC, .3A 50/60Hz Output: Selectable low voltage 24VAC, 20VA, .85A or 12VAC, 20VA, 1.7A SPST-NO isolated contact 115VAC 1HP 240VAC 2HP Sensors: 2 required (thermistor, 10Kohm @ 25C/77ºF). Differential: on at 4ºF, off at 1.5ºF Desired Pool Temp.: 70-104ºF calibrated scale or Solar Off, 75 (24ºC) 104ºF (40ºC) on some models Recirculate freeze: Onat 42ºF (5.5ºC), Enabled via jumper Nocturnal cooling: On when collector 8ºF less than pool and pool hotter than limit, off when collector 3ºF less than pool or pool cooler than high limit. Enabled via jumper Installation Mounting The GL-235 is designed for outdoor use. Mount the box vertically with the knockouts facing downward. For safety, the GL-235 must be a minimum of 5 feet (horizontally) from the pool or spa. Power input Turn off power at circuit breaker before wiring. Remove the internal panel to expose the wiring connections. Either 115VAC or 240VAC can be used. Refer to the input wiring diagram (Figure 1) on next page. WARNING: Applying 240VAC to the 120VAC input terminals will cause permanent damage to the control. Grounding Refer to NEC and local codes for specific grounding requirements. In general, a separate ground conductor must be run to the ground terminal on the pool service panel. Low Voltage (LV) output: Solar Valve The GL-235 controls a single valve. In most applications this is the solar valve, which diverts water through the collector panels or through the normal pool loop depending on conditions. All controls are shipped with the output voltage set to the industry standard 24VAC. To use the GL-235 with older 12VAC valves, move jumper J4, located on the right side of the circuit board. 2 With the sensor disconnected from the unit, measure the resistance of the sensor using an ohmmeter. At room temperature (25ºC/77ºF) the sensor should measure approximately 10K ohms (10,000 ohms ± 1%). For other resistance measurements at different temperatures, consult the table at back of manual. If the sensor is not returning the correct value, it is defective and will need to be replaced. If the sensor is returning approximately the correct value, reconnect it to the terminals marked "SOLAR SENSOR". If the "CHECK SENSOR" indicator remains on, the unit is defective and needs to be replaced. If FREEZE PROTECTION is enabled: When a sensor is disconnected from the unit and freeze protection has been enabled, the GL-235 will recognize this as a freeze condition and activate freeze protection. Temperature/Resistance/Voltage All Hayward controls use 10K thermistor sensors. When disconnected from the control the sensor will read 10K ohms at 25ºC/77ºF. Refer to the chart below for the resistance at other temperatures. For a given temperature, the resistance reading should be accurate to ±1%. For a given resistance reading, the temperature reading should be accurate to ±0.5ºF. Voltage measurements should be accurate to ± 2%. Ohm measurements made with sensor disconnected from unit. Voltage measurements made with sensor connected to unit and power applied. Sensor voltages are DC volts. °F Oh m s V olts °F Oh m s V olts °F Ohm s V olts °F Ohm s V o lts 1 82,719 4.46 41 25,391 3.59 81 9,076 2.38 121 3,679 1.34 2 80,142 4.45 42 24,704 3.56 82 8,861 2.35 122 3,602 1.32 3 77,656 4.43 43 24,037 3.53 83 8,651 2.32 123 3,527 1.30 4 75,255 4.41 44 23,391 3.50 84 8,447 2.29 124 3,454 1.28 5 72,937 4.40 45 22,764 3.47 85 8,249 2.26 125 3,382 1.26 6 70,698 4.38 46 22,156 3.45 86 8,056 2.23 126 3,312 1.24 7 68,535 4.36 47 21,566 3.42 87 7,867 2.20 127 3,244 1.22 8 66,447 4.35 48 20,993 3.39 88 7,684 2.17 128 3,177 1.21 9 64,428 4.33 49 20,438 3.36 89 7,506 2.14 129 3,112 1.19 10 62,479 4.31 50 19,900 3.33 90 7,333 2.12 130 3,049 1.17 11 60,595 4.29 51 19,377 3.30 91 7,164 2.09 131 2,987 1.15 12 58,774 4.27 52 18,870 3.27 92 6,999 2.06 132 2,926 1.13 13 57,014 4.25 53 18,377 3.24 93 6,839 2.03 133 2,867 1.11 14 55,313 4.23 54 17,899 3.21 94 6,683 2.00 134 2,809 1.10 15 53,669 4.21 55 17,435 3.18 95 6,530 1.98 135 2,752 1.08 16 52,078 4.19 56 16,985 3.15 96 6,382 1.95 136 2,697 1.06 17 50,541 4.17 57 16,548 3.12 97 6,238 1.92 137 2,643 1.05 18 49,054 4.15 58 16,123 3.09 98 6,097 1.89 138 2,591 1.03 19 47,616 4.13 59 15,711 3.06 99 5,960 1.87 139 2,539 1.01 20 46,225 4.11 60 15,310 3.02 100 5,827 1.84 140 2,489 1.00 21 44,879 4.09 61 14,921 2.99 101 5,697 1.81 141 2,440 0.98 22 43,577 4.07 62 14,543 2.96 102 5,570 1.79 142 2,392 0.97 23 42,318 4.04 63 14,176 2.93 103 5,446 1.76 143 2,345 0.95 24 41,099 4.02 64 13,820 2.90 104 5,326 1.74 144 2,299 0.93 25 39,919 4.00 65 13,473 2.87 105 5,208 1.71 145 2,254 0.92 26 38,777 3.97 66 13,136 2.84 106 5,094 1.69 146 2,210 0.90 27 37,671 3.95 67 12,809 2.81 107 4,982 1.66 147 2,167 0.89 28 36,601 3.93 68 12,491 2.78 108 4,873 1.64 148 2,125 0.88 29 35,565 3.90 69 12,182 2.75 109 4,767 1.61 149 2,084 0.86 30 34,561 3.88 70 11,882 2.72 110 4,664 1.59 150 2,044 0.85 31 33,590 3.85 71 11,589 2.68 111 4,563 1.57 151 2,005 0.84 32 32,648 3.83 72 11,305 2.65 112 4,464 1.54 152 1,966 0.82 33 31,737 3.80 73 11,029 2.62 113 4,368 1.52 153 1,929 0.81 34 30,853 3.78 74 10,761 2.59 114 4,274 1.50 154 1,892 0.80 35 29,998 3.75 75 10,500 2.56 115 4,183 1.47 155 1,856 0.78 36 29,169 3.72 76 10,246 2.53 116 4,094 1.45 156 1,821 0.77 37 28,365 3.70 77 9,999 2.50 117 4,007 1.43 157 1,787 0.76 38 27,587 3.67 78 9,758 2.47 118 3,922 1.41 158 1,753 0.75 39 26,832 3.64 79 9,525 2.44 119 3,839 1.39 159 1,720 0.73 40 26,100 3.61 80 9,297 2.41 120 3,758 1.37 160 1,688 0.72 11