Fahrenheat 5000 Switch Install Wiring Check

[Lightyear68]

After a lot of research I want to add a switch to turn off the heating element to the Fahrenheat unit but allow the fan to continue running. Marley tech support advised to wire "the proper" switch [which I think is this 30 amp industrial switch]in series with the built-in thermostat at connection L1.

I'd appreciate it if those more knowledgeable than me would see my attached diagram and let me know if this is correct and safe.

10-2 from the panel to the switch at shop table height.
10/3 from the switch to the dryer outlet at ceiling height.
Dryer plug to heater wiring area at L1, L2, and T-Stat L1 connection--see attached image (courtesy of Anthony Watson)

I have basic electrical skills but am no electrician.

Thanks in advance,

 

[Falcon67]

Not sure what you're after - those unit have a temp switch that runs the fan for a while after the element turns off. If it's wired like my G73 (refer to your F5000 internal wiring diagram) it looks like you'd just need a switch to short across the fan control temp switch because the onboard t-stat switch is wired only to the heater element. With 240V power applied, you may be able to short across the fan control thermal switch and have the fan come on. If you don't want the heater element, turn the t-stat off.

Edit - yep, same wiring as a G73
http://www.northerntool.com/images/downloads/manuals/17303.pdf

 

[Lightyear68]

Not sure what you're after - those unit have a temp switch that runs the fan for a while after the element turns off. If it's wired like my G73 (refer to your F5000 internal wiring diagram) it looks like you'd just need a switch to short across the fan control temp switch because the onboard t-stat switch is wired only to the heater element. With 240V power applied, you may be able to short across the fan control thermal switch and have the fan come on. If you don't want the heater element, turn the t-stat off.

Thanks for the reply Falcon67.

What I'm trying to do is be able to switch the heater off from my shop table level (don't want to climb the ladder each time) while still allowing the cooling fan to run it's last cooling cycle.

Tech support tells me that the unit cannot be turned off unless I wire a switch--specifically at the L1 connection of the thermostat. Switching off will then cut power to heating elements but not the fan to allow cooling for it's last cycle.

I found a few threads with this process--some add an external thermostat and some just the disconnect switch.

What I need to know is whether my wiring as diagrammed in my OP works for this purpose.

Standing by for more input from the pros!

 

[Falcon67]

IF I read the wiring diagram right, I think it'll work. Make sure the switch is rated for 30A because the heater elements pull 21A at full power.

 

[Pantsfall_McFixit]

Edited: Just looked at the manual, apparently the 5k watt model does not have a contactor. Perhaps the thermostat is line voltage?

 

[Falcon67]

Yes, the t-stat is line voltage.