Assessments - 1, GPA: 5 ( )

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You may inject diluted liquid chlorine and muriatic acid as long as each are diluted with 75 % water in the supply tank. The feeders must be adjusted to a slow enough rate to prevent the water in the surge tank from dropping below 7.6 pH and or chlorine levels above 5 p.p.m. You can test the surge tank water while the feeders and circulation pump is running just as you would the pool water. Then adjust the solution or rate of feed accordingly. The circulation pump usually moves the water through the surge tank rapidly enough to keep chemical concentrations down. Never place chlorine tablets in the surge tank. CAUTION Never allow a tablet type chlorinator to inject solution into the surge tank, under any circumstances. Also note: Electric type feeders must be electrically relayed to the circulation pump, so the feeders will shut off when the pump does. CHEMICAL APPLICATION FOR SPAS Spas require some special attention due to their small water volume and high heat compared to a normal swimming pool. A spas water balance fluctuates more rapidly than a pool. The following are suggestions that we feel will prolong the life of the heat exchanger used for a spa heater. 1. Test the water frequently to prevent drastic fluctuations in pH and sanitizer levels especially after usage. Keep total alkalinity at 100 p.p.m. to 120 p.p.m. 2. Spas react quickly to chemicals when added. Use small amounts and retest the water until you reach the desired chemical values. 3. Some chlorine tablets are very acetic and will lower the pH of the spa water as the solution is fed. Make sure the spa water does not drop below 7.4 pH, see page 20 and 21 for more information. 4. Bromine has a more neutral pH value and works well in spa water if pH is maintained at 7.8-8.0. It is a form of chlorine widely used for spas. Do not install a brominator on the suction side of the filtering system. WARNING Working with muriatic acid can be dangerous. When cleaning elements always wear rubber gloves and eye protection. Add acid to water, do not add water to acid. Splashing or spilling acid can cause severe personal injury and/or property damage. 5. Using muriatic acid right from the bottle at the same strength as packaged may drastically lower the pH uncontrollably. There are some dry powdered forms of acid that work better for spas and are somewhat milder and are easier to handle. 6. All the same rules of chemical application and chlorinator placement that apply in the previous chemical section also apply to spas. Always consult a professional pool builder or service and follow the chemical manufacturers directions. 24 SHUT DOWN & FREEZE PROTECTION PROCEDURES When shutting the unit down for the end of the swimming season you must consider some items to protect the unit from inclement weather. It is best in most situations to shut the unit off by turning the thermostat all the way down, to the "left". Leave power ,(circuit breaker), to the unit “on” unless the pool or spa water temperature drops below 50 degrees F. If you shut off the main power supply due to freezing conditions, be sure to preheat the compressor for 8 hours before attempting to start the heater. SHORT TERM FREEZE PROTECTION PROCEDURES When the outside air temperature is forecast to drop below 32 degrees F for a short time: You should set the circulation pump timer to run 24 hours per day in order to circulate water through the unit and filtration system. Standing water inside the unit will freeze and damage the units heat exchanger and refrigerant system. Shut the heat pump off and do not try to heat the pool during freezing temperatures. If the unit is left running it may ice up and the compressor will stop running. The defrost control inside the unit will shut the compressor off but allow the fan to run. The fan will circulate air through the unit to help defrost the evaporator air coil. If you know that the temperatures are going to be below 36 degrees F, you should eliminate the possibility of icing and just shut the unit off. Do not use the circuit breaker as the “on”/“off” switch, but keep the water pump running. LONG TERM FREEZE PROTECTION / DRAIN VALVE INSTALLATION If you live in a climate that has a seasonal swim season due to winter, you should follow these long term freezing precautions. Spigot Type Drain Valves IN OUT Shut Off Valves Shut the water pump off. Close both shut off valves. Open both drains and allow water to exit. Use pressurized air on the water in spigot only, to force the rest of the water out the other spigot. If you live in an area that experiences freezing temperatures, the heat exchanger/water coil and bypass plumbing must have all water removed to prevent damage to the heat pump system. This procedure should be done prior to the first freeze along with your other pool winterizing routine. When you drain the filter system and piping you should include the heat pump as well. There should be two spigot type drains plumbed into the heaters water in and w...

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