Question about Hayward H Series Millivolt 250,000 Btu Pool Heater H2501

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I HAVE A HAYWARD H1501 POOL HEATER THAT IS LEAKING WATER FROM THE CENTER OF THE BULB WELL THAT IS MOUNTED ON THE LEFT SIDE OF THE FRONT HEADER. HOW CAN I STOP THE LEAK?

I HAVE A HAYWARD H1501 POOL HEATER THAT IS LEAKING WATER FROM THE CENTER OF THE BULB WELL THAT IS MOUNTED ON THE LEFT SIDE OF THE FRONT HEADER. HOW CAN I STOP THE LEAK?

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Teflon tape the threads about 4 turns of tape. If this won't stop it you'll have to replace the header

Posted on Jun 23, 2009

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How to replace the Thermostat in Hayward pool heater


go to pool store and spend the money on
Alladin or Magic Lube. It is a bit expensive and a good sized tube but its designed for your pool system. use it on all your gaskets and threads. DO NOT USE PETROLEUM BASED (vaseline)

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Location of drain plug on Hayward H series heater ?


There should be two. Remove the metal cover on opposite side of plumbing side and the "Return" heater will be exposed. There is normally a plug there. On "Header/Plumbing" side, there should be a plug on bottom of the in/out header, below the plumbing.

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Where is the temp sensor on a Hayward H300 ED2 pool heater


Hayward H series with ED option have electronic ignition with one or two dial thermostats. Along with thermostats, there are other temperature safety switches to shutdown the heater in case of over temperature, both for water temperature and for interior cabinet temperature.

CAUTION: Always turn off power, gas and the water pump whenever repairing your Hayward H series pool heater.

CAUTION: The Hayward H series pool heater is essentially a gas furnace. Only a qualified technician with proper training and tools should make repairs of your heater.

I'm assuming you are seeking the location for the thermostat sensor rather than the temperature switches, and I'm assuming you have dial-style thermostat(s). Incoming water temperature is measured at the inlet of the water heat exchanger. For most H series models, provision is made for two thermowells. If your unit has dual thermostats, both of these wells will have a bulb-style sensor inserted directly into the thermowells. If only one thermostat, then one of the thermowell ports will be sealed with a plug. The factory orientation of the water inlet and outlet is on the right side of the heater (as you face the front), but the installer has the option to locate the inlet/outlet on the left side with a field modification. Check your particular inlet/outlet orientation for either right or left side.

The heat exchanger thermowells and the thermostat sensors are located directly behind a two metal access plates that surrounds the heat exchanger inlet and outlet ports. Several Phillips-style screws secure the access plates to the heater cabinet. After several years of outside operation, these screws will likely be corroded and need some anti-rust oil to aid in their removal. When you have completed your examination of the thermowells and thermostat bulbs, I recommend applying some grease to the screws before re-assembly.

Once the access plates have been removed, the thermo-wells can be seen on the left side of the heat exchanger, which is the inlet side. Use the arrows on the top of the heat exchanger as a guide for inlet an outlet. The thermostat sensor bulb is directly inserted into the thermowell without any securing mechanism other than a copper or brass friction strip. I have seen some situations where a small amount of fiberglass has been inserted behind the bulb. The bulb should be inserted all the way into the thermowell until it touches the back. The copper or brass strip is used to keep the bulb in contact with the sides of the thermowell.

(For non-dial thermostat systems, the inlet water temperature measurement is made in the same location, but with a different device.)

CAUTION: The thermostat sensor is a liquid-filled thermo-expansion sensor. It relies on the thermo-expansion properties of a non-compressible fluid to operate the thermostat switch. Take care to not crush or kink the capillary tube between the sensor bulb and the dial thermostat switch.

If you remove the sensor bulb, take care to capture the copper/brass strip in order to use during re-insertion.

NOTE: Thermowells are sized to the particular thermostat sensor bulb. If you replace the thermostat sensor be sure to use the same size sensor bulb as the one being removed. If this is not possible, the thermowell may also need to be replaced.

Check your manual for verification of part numbers. The H series dial thermostat part number is CHXTSW1931. The matching thermowell is CHXTBW1930.

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1 Answer

How do you winterize a inground pool heater? model# H200ed2 serial# 21130507102557001


Drain it using the drain valve on the bottom-side of the inlet/outlet header; make sure the heater sits level or slightly tilted down on the header side. You also need to drain the water tube that feeds the pressure switch inside the heater cabinet. Turn off the gas and power off the circuit and you are done. If you cover it DO SO LOOSLY! Wrapping it tightly and not allowing air to flow thru will lead to rapid rusting of all the sheet metal.

John

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1 Answer

My pool Heater is leaking


You will need to take the top off the heater to see exactly what is leaking. It could be something as simple as a header gasket, or as bad as holes in the heat exchanger.

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2 Answers

I have A hayward heater H100IDEVERYTIME the heater kicks on it makes A clunking noise and the inlet hose shakes


Check your water flow and make sure your by-passes are set to send water threw the heater. That is to say shut off. The water in the heater is over heating and the clunking is the water turning to steam.

Jun 26, 2010 | Hayward H Series Pool & Spa Heater 400k...

1 Answer

Fixing our hotel's Hayward CSPAXI55 spa heater.


You can probally get a manuel on line if you go through Hayward.
When he took the old one out he probally just wired the circut together where the temp assembly goes into the cabnet in the top right front of cabnet in the upper panel. Then the temp probe runs around the side to the water header or manifold. If this is in the orignal spot it is on the right of the heater and easy to find. I'm not sure but if the exchanger has been turned then it will be around the back side of the header and it will be on the left side of the heater. Geting a manuel for this is a good idea anyway, good luck.

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1 Answer

I'm getting an 'SF' error message on my H series pool heater. Something I can fix myself?


SF is a thermistor or hear sensor error. If the heater is not reseting it self after a few minutes then you may need to replace the sensor. Yes you probally can do this. On the left side of the water header their is a small tube like thing that slides into the header. It will have two wires comeing from it and you will follow these into the heater and around to the front panel. When they get to the circut board you just un plug them and string a new one in it's place. Good luck.

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Pilot light on pool heater is on but heat exchanger not kicking in?? model h1501


check for 24 ac at the brow wire if 24 change the valve if zero change the ignition control

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