Question about Hayward H-series Electronic Gas Pool Heater H250

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Does hayward hdn250 have a firemans switch? - Hayward H-series Electronic Gas Pool Heater H250

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I upgraded my Jandy RS controller to run Jandy epumps and installed a new Pentair Mastertemp 400HD heater. Prior to connecting the pool heater thermostat all worked perfect. all instructions stated to...

bad info firemans switch is continuity only if hooked up to firemans switch run new wire from each end of firemans switch to pins 1 and 2 of long plug along top of PCB board make sure to read inside schematic for dip switch positions firemans switch to control heater on and off you will have to turn heater all the way up max setting for temp

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Does a hayward gas heater have filters within the unit?

there are no filters in these units. there is a thermostat, low limit switches, high limit switches, pressure switch (1-5lbs), fireman switch etc. because it is a propane unit, fires and runs, i would suggest checking the supply pressure for the propane. if there is less than 30lbs in the tank, the system may not run properly. if it was plumbed with the wrong size supply pipe, that could be an issue.

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How to install firemans switch entire 400hd

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Pentair MinMax NT Fireman's switch connection

The connection point is not critical as long as the fireman's switch is connected in series with the safety loop. For instance you may cut a wire connected to the pressure switch and use two wire nuts to connect the wires from the fireman's switch, one to each side of the cut wire.

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1) T101P201 timer does not have a separate manual yet

2) However typical T101P201 timer is ordinary T101 timing mechanism inside Nema 3R beige-colored outdoor plastic enclosure, with additional fireman's switch.
Wiring for T101 shows on following link, and shows on door of timer enclosure:
Check that your timer terminals match illustrations because many timers can fit inside Intermatic enclosures.

3) Fireman switch wiring:
T101P201 has a fireman's switch that wires directly to the pool heater thermostat.
If you are not using the timer for pool heater, or if heater does not have connection for fireman's switch, then do not connect fireman switch wires, and just tape them out of the way.

Add a comment for more information

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I've installed a intermatic t101p201 which has a heater delay circuit - but can't get power to the heater through the delay switch when i turn the switch manually on - i haven't checked yet to...

Check that your pool heater supports optional fireman's switch
Black wires on firemans switch connect to pool heater. Power to fireman switch comes from pool equipment and not the timer.
If pool equipment does not support fireman, then cap off the wires.

Fireman switch turns off heater 15-20 minutes before turning off pump.
The purpose is so pool equipment lasts longer.

You can buy the fireman's switch separately, but if this is new timer, then switch is probably good.
Open following link to identify fireman's switch and related parts for the timer:

Upvote the help.
And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

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Where do I attach wires from heater (fireman switch??)

The Fireman Switch wires will attach to a micro switch inside yout timer housing ... it is a separate switch on a attached cam. Takes a special timer.

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Pool heater was running and pump shut off - appears the heater overheated and many of the tags and labels inside the panel melted or charred. The heater will now not restart - what can I do or look for to...

The "Fusible Link" in the electrical circuit/loop did as adverstised and failed, thereby cutting off the heater. I found the trouble shooting steps on the Jandy website, and followed them to solve the issue.

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