Have a ecolab dishwasher 480v line voltage, how do you wire a roof top exhaust fan 120v?

Try calling Ecolab service and see if they can offer a manual:

1-800-352-5326

Intermatic T174 wires exactly like the T104 240Volt timer.
Only difference between T174 ans T104 is the day skipper wheel on T174.
http://waterheatertimer.org/How-to-wire-T104-Intermatic-timer.html#T104

These timers are very versatile and can be wired many ways, and changed to control different voltages by changing clock motor wires, or changing clock motor.
Voltages include typical 240Volt. But also 277V, 480V, 120V, 208V and 24Volt

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Unknown if this is new installation, or old installation that went bad.
Old install, then check voltage is correct for rating plate, check that line power is not under-voltage, check that photo control receives enough light by shining 120Volt light bulb onto photo eye, replace photo eye
New install, check wiring. Photo cell has 3 wires, For example Black White and Red.
Black and White connect to power source, and Red goes to load.
http://waterheatertimer.org/How-to-install-and-troubleshoot-photo-eye.html

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

A 2 pole circuit breaker is for 240 volt appliances such as ranges, dryers, water heaters, large air conditioners, and some motors. The breaker is designed so that _all_ conductors are de-energized when one turns OFF the breaker, or it trips due to overload or short circuit. If one used two individual breakers to supply a 240 volt load (which is not permited by National Electric Code), one could turn OFF just one breaker and render the equipment nonfunctional, yet the other breaker would still be supplying 120 volts to the equipment. Anyone working on that equipment, thinking that the equipment is turned OFF because it's not functioning could be killed by that energized 120 volt line under the right conditions. That's why it's important to always check for voltage on equipment that has been "turned OFF".

Most Baxter BXA ovens have separate power supplies, usually 120v for the controls and lights, a 120v output on a circuit breaker for the roof fan, and a 208VAC 3 phase supply for your convection motor. Older Baxter ovens may have a 3 phase service disconnect inside the electrical/burner compartment, if I recall correctly the BXA models do not and the only way to shut it off is via the 3 pole breaker at the service panel.

From what I found, 480 volt, 3-phase is 480 volts from leg to leg.
It is also 277 volts from each leg to neutral.
One can use a step down transformer to reduce the 480, 3-phase to 208 v, 3-phase and then each leg of the transformed voltage would be 120 volts to neutral. Try to locate the transformer in or near the chiller control cabinet.

If the jumper has been removed, then the control is working in the low voltage circuit. Black should be 120v in, White the 120 going out to the fan, and the red or limit wire is (should be) in the low voltage control circuit. Have you looked at the wiring diagram for the F and L Control? If not I will provide a link for you. https://customer.honeywell.com/techlit/pdf/69-0000s/69-0117.pdf

Hope this helps

You havent indicated what voltage of phase. Is it single phase or 3 phase. 120V or 480V? Bacically you need some type of fuseable disconnect (breaker or fuses) a motor starter (contactor with overloads) and something to control the starter (either manual starter or coil energized starter controlled remotly. A good source of info is: www. Mikeholt.com

Check for 120V (breaker). Look for loose/shorted wiring connection at the dishwasher's junction box. Check all wiring connections to the control panel, electronic control and thermal fuse. Test the continuity of the thermal fuse (part # 8193762). If that's ok, you should replace the control panel or the problem is likely with the electronic control board (part # 8564546).

Good luck.

You will need to take the cover off of the breaker panel. Find the three lugs that the incoming hot wires are hooked to. With three phase you will have three hot lines. Check the voltage between the phases. L1 - L2- L2- L3- and L1 - L3 Also check the voltage from each line to ground. If you havw 120/208 three phase current you will have 208 +or- a few voltage between the phases and 120 or so from each line to ground. If you have 120/240 three phase you will have 240v across the phases and 120 to ground on two legs and 208 to ground on one leg, this is called a "wild" or high leg. You may also have 480v into the shop and you will know that very quickily if you get 480v between phases. No matter if you have another voltage, you can buy a trandformer that can convert whatever you have to 208/120 3 phase for your unit.