Will a gas heater operate at the low speed of a dual speed motor?
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Probably not - Most gas heater will shut off at low GPM levels (20-40) to keep the heater cores from overheating - 20 for 200 BTUs, 40 for 400 BTUs. Depending on your pool system you might get these GPM levels at the low speed but generally these heaters must be run at the motor's high speed.
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What size pump would I need for this heater? Is 3/4 hp enough. Also is this big enough for an 18x36 inground?
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I would suggest a 1hp pump ( depending on the size of the filter you have ) The filter has a max Gallons Per Minute. The heater would work with a 3/4, but you may not get the water turn-over required for that many gallons. Also, the larger the BTU's, the quicker the water will heat. 300,000 is plenty, as long as you have some form of heat retention - like a solar blanket of a liquid solar blanket call Cover Free. It works as good as a solid blanket without the hassle.
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Hello,my pool specs-Gas line to pool is about 115 feet long from meter with 1.5 inch pipe to pad and 1 inch to old heater.
WhisperFlo pump w/1.5 HP AO Smith B842 motor (WPE -6). 47 feet head
Power available is 230 v to the old heater
Pool is 16x36 avg depth 5 feet
Filter is Aquatec - FNSP 48
Do you see any required flow, power, or natural gas that would limit replacing my burnt out Rheem with this system.
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Johnny, You'll need to have a 1.5" pipe size for the gas supply to the unit and a manual bypass installed in order to have the MasterTemp Heater 300,000 BTU, NG w/ Electric Ignition, Low NOx installed. You can find all this information in the Pentair Heater Mastertemp Owners Manual.
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I keep my pool set to 95 degrees during the winter. we swim everyday. every three or four days the heater shuts down and says to service. I shut it off and then back on and it fires right back up and runs for several days. then does the same thing?????????? any help there. all pentair equipment heater is a 460734 300 mastertemp date made 5/3/14 i have had several pool companies out to look at it and nobody can figure it out... HELP
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Hi Shane, Have you given Pentair a call, it sounds like an electrical part has gone bad?
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