Hayward H-Series Millivolt Na Mv Pool Heater All models English - Page 26

SECTION 5. CONSUMER OPERATION & MAINTENANCE PROCEDURES ! Warning: Do not ingest alcohol or drugs during use or prior to using pool, spa or hot tub. Ingestion of such intoxicants can cause drowsiness which can lead to unconsciousness, and subsequently result in drowning. Do not heat pool, spa or hot tub water in excess of 102°F. A temperature of 100°F is considered safe for a healthy adult. Hotter water increases the risk of hyperthermia. Special caution is suggested for younger children. Pregnant women beware! Soaking in water above 102°F (39°C) can cause fetal damage during first three months of pregnancy (resulting in the birth of a brain-damaged or deformed child). Pregnant women should adhere to the 100°F (38°C) maximum rule. Before entering the spa or hot tub, users should check the water temperature with an accurate thermometer; spa or hot tub thermostats may err in regulating water temperatures by as much as four degrees Fahrenheit (2.2°C). Persons with medical history of heart disease, circulatory problems, diabetes, or blood pressure problems should obtain their physician's advice before using spas or hot tubs. Persons taking medications which induce drowsiness, such as tranquilizers, antihistamines or anticoagulants, should not use spas or hot tubs. If the pool/spa is used for therapy, it should be done with the advice of a physician. Always stir pool/spa water before entering the pool/spa to mix in any hot surface layer of water that might exceed healthful temperature limits and cause injury. Do not tamper with controls, because scalding can result if safety controls are not in proper order. Electronic Heaters Electronic heaters are provided with a digital temperature control that can be set to heat either the pool or spa. The digital temperature control is located on the control panel. The digital thermostat contains a mode key, up and down temperature adjustment keys, a LED display, and five status LED's. To turn the heater on, toggle the "MODE" key to "POOL:' or "SPA". The water temperature will be displayed. To display the "POOL" or "SPA" set point, press the UP or DOWN key. The set point will flash while being displayed. To adjust the set point, press the UP or DOWN key until the desired set point is displayed. The display will revert back to showing the water temperature after about 15 seconds. The temperature can be displayed in either Fahrenheit or Celsius. To change to Celsius, move the position of the #1 "Dip Switch" (located on the back of the circuit board) to "C". In the POOL or SPA modes, the actual water temperature is shown on the display. The Heating LED illuminates whenever the heater fires. If an abnormal condition is detected, the Service LED illuminates and a diagnostic code is displayed. Lists of the indicator LED's and diagnostic codes are shown below: LED STANDBY SPA POOL SERVICE HEATING Status LED Explanation Illuminates when the heater is "off". Illuminates when the heater is in the SPA mode. Illuminates when the heater is in the POOL mode. Illuminates when an abnormal condition has been detected. A diagnostic code will be shown on the display. Illuminates when the heating is in progress. Temperature Controls: Diagnostic Codes Millivolt Heaters Code Explanation Millivolt heaters are provided with a mechanical thermostat. SF The thermostat and system switch are mounted on the control HS panel. The thermostat controls the pool or spa temperature. The system switch allows one to turn the heater on or off. See LO Figure 41. IF Thermistore failure. Maximum water temperature exceeded. Limit string open. Ignition Failure The memory stop provides HF a manual means of locking the desired maximum temperature setting of the pool or spa. Once the desired temperature SET SCREW MIN IMUM setting of the knob has been KNOB determined, the memory stop is adjusted by loosening a set MEMORY STOP screw, rotating the memory stop to the knob setting, and retight- ening the set screw. The water temperature should be set and checked with an accurate MAXIMUM thermometer immersed in the pool or spa. Figure 41: Temperature Controls Flame sense failure Periodic inspection: The H-Series heater is designed and built for long performance life when installed and operated according to the manufacturer's directions. Regular inspection by qualified service personnel is recommended to keep the heater operating properly. The following inspection points are suggested to help maximize heater life: 24