Adding a Fireman Switch to Intermatic timer

[Woody007]

I discovered that a switch can be added to mechanical timer that will shutdown heater 20min before pool pump. Sounds like a good idea, and I'd also like to put my SWG in that circuit as well.
Is there any problem in connecting SWG and heater to same switch? The two have combined 3 amp draw, and the switch is rated for 10a, so it seems like it would be ok. I'd just need to connect one lead from switch to load side of timer, and the other switch leg to one leg of heater and swg, correct?
Are there any wi-fi pump switches that have multiple timed outputs?

 

[ajw22]

I discovered that a switch can be added to mechanical timer that will shutdown heater 20min before pool pump.

The T101 or 104 timers can have an optional 156T4042A Heater Control Switch Kit that will open the fireman's switch on the heater 20 minutes before the timer, usually controlling the filter pump, will shut off.

Timers - Further Reading

www.troublefreepool.com

Sounds like a good idea, and I'd also like to put my SWG in that circuit as well.
Is there any problem in connecting SWG and heater to same switch? The two have combined 3 amp draw, and the switch is rated for 10a, so it seems like it would be ok.

It will work fine.

I'd just need to connect one lead from switch to load side of timer, and the other switch leg to one leg of heater and swg, correct?

Is the heater and SWG wired for 120V or 240V?

Are there any wi-fi pump switches that have multiple timed outputs?

Yes, but I have not seen any WiFi timers with heater cool down connection.

 

[Woody007]

Is the heater and SWG wired for 120V or 240V?

I haven't got my meter out yet, but they appear to be 220 and share terminals on the timer with the pump.

 

[ajw22]

I haven't got my meter out yet, but they appear to be 220 and share terminals on the timer with the pump.

So the pump, heater, and SWG power all get connected to the LOAD screws.

Best practice is to not put more then 2 wires under a screw. So you should wire nut together the three wires with a short pigtail and put the pigtail on the LOAD screw.

 

[Woody007]

So the pump, heater, and SWG power all get connected to the LOAD screws.

Best practice is to not put more then 2 wires under a screw. So you should wire nut together the three wires with a short pigtail and put the pigtail on the LOAD screw.

One leg of fireman switch and pump on load screw. Other leg of fireman switch in wire nut with heater and SWG that were on load screw, right?
That way the heater and SWG shutoff while pump runs, then pump shuts off as normal from timer peg.

 

[ajw22]

One leg of fireman switch and pump on load screw. Other leg of fireman switch in wire nut with heater and SWG that were on load screw, right?

NO, NO, NO! Fireman switch does not connect to power LOAD screws.

Fireman switch connects to 156T4042A Heater Control Switch.

That way the heater and SWG shutoff while pump runs, then pump shuts off as normal from timer peg.

No, you just want the heater to shutoff before the pump.

SWG power connects to same screws as pump power and SWG turns on and off with pump.

 

[1poolman1]

Which heater? The actual fireman's switch connects to the low voltage part of the heater control, or the "remote" connection found in the owner's manual. It is just a micro switch that is actuated by a cam that is placed behind the "off" tripper unless the design changed and the tripper is enough. With all the automation in place they are very seldom seen anymore. It can't control a SWG in the way you intend.

 

[Woody007]

NO, NO, NO! Fireman switch does not connect to power LOAD screws.

Fireman switch connects to 156T4042A Heater Control Switch.

Isn't that part number the Fireman Switch? My thoughts were to have the fireman switch toggle power to the heater just like the power switch on the heater front panel and just turn it off 20 mins before pump.

SWG power connects to same screws as pump power and SWG turns on and off with pump.

That's the way I have it now but thinking that letting the water flow without the SWG on would flush out the pipes.

 

[Woody007]

Which heater? The actual fireman's switch connects to the low voltage part of the heater control, or the "remote" connection found in the owner's manual. It is just a micro switch that is actuated by a cam that is placed behind the "off" tripper unless the design changed and the tripper is enough. With all the automation in place they are very seldom seen anymore. It can't control a SWG in the way you intend.

Rheem heater. One of these Find product information, documents, videos, and installation assistance for the Rheem Digital and Millivolt PoolSpa Heaters
I get what you guys are saying in that the Fireman switch would be connected to the control board of the heater and not cut power to the heater but would control it like the soft buttons.
My current heater power is supplied via timer so that the heater (and SWG) has no power until the timer kicks in. I just wanted to let the pump run for a while after heater and/or SWG were turned off.

 

[1poolman1]

Rheem heater. One of these Find product information, documents, videos, and installation assistance for the Rheem Digital and Millivolt PoolSpa Heaters
I get what you guys are saying in that the Fireman switch would be connected to the control board of the heater and not cut power to the heater but would control it like the soft buttons.
My current heater power is supplied via timer so that the heater (and SWG) has no power until the timer kicks in. I just wanted to let the pump run for a while after heater and/or SWG were turned off.

Is this digital or millivolt? Just follow the instructions for remote control of the heater. While not controlling temperature, the fireman's switch will become the remote control. The connection would be on the back of the board for a digital heater, it doesn't matter whether you use the "pool" or "spa" wiring. The heater then placed in bO mode after the required temperature is set with the power on. Done.