Looking for help with a simple time delay relay.

Hello,

I have a Dayton 1EJE9 (Grainger part number) DPDT time delay relay that I am looking to wire into a heater circuit to control a fan and electric louver. What I want is, when the heaters come on the fan and louvers come one. When the heaters go off, the fan and louvers will stay on for a set period of time.

Wiring the fan and louver in I understand fine. Its the control power that I am having trouble with. In the attached image I will be using function "D", Off Delay. My fan will be wired into terminals 25 & 28 and my louvers will be on terminals 15 & 18. My control power of my heater unit is 208 3phase. So my question is;

Would I use one line of the constant three phase on terminal A1 a ground connection on A2 and line of the switched 3 phase on terminal S? Or would that be incorrect.

I tested this using setup using +24VDC on A1 -24VDC on A2 and switched +24VDC on and off on terminal S and the relay worked as it should for function "D" I just am not an electrician and have little experience with 3 phase power.

Any help would be greatly appreciated.

Thanks,
Chris

Need a datasheet

Some diagrams would also be helpfull


Thats the specs below always helps if you upload these as well
Item Time Delay Relay
Type Time Delay
Contact Form DPDT
Base Type DIN Rail
Number of Contacts 2
Function Multifunction
Contact Amp Rating (Resistive) 15
Contact Amp Rating (Inductive) 7
Contact Material Silver Alloy
HP @ 120V 1/2
HP @ 240V 1
Coil Volts 12-240VAC/DC
Coil VA Rating 3
Hz 50/60
Min. Time Setting 0.1 sec.
Max. Time Setting 240 hrs.
Display LED
Standards E49375
Green Environmental Attribute Programmable Timer Enables Reduced Energy Consumption
Green Certification or Other Recognition RoHS Compliant

Thank you. I attached the documents that I have on the relay and a schematic that I put together. As I said, I am not an electrician, so I hope the schematic makes sense. Let me know if I can provide any more information.

Thanks again,
Chris

Cheers Chris that does help alot I can away go now and attempt to provide an reasonable answer

Your diagram is correct Chris Cant see any problems with what your doing

The only question i would ask is where is your trigger coming from A mechanical switch ? Or a heater thermostat and is this wired into the heater element as well or does this operate as a separate entity

Example I use a independent thermostat This would be powered by a separate 120vac in your case isolation transformer which produces five/ 12volts volts for CPU control operating a further relay or opt coupled trigger from a 12 volts supply which is the way I would interpret this

Or

If this is conventional stat that is wired to the heater I can see what your doing with the switch so I’m assuming its independent which I sincerely hope it is

See upload for my own suggestion to this as How I would interpret this

Re draw image below "Safest way of doing this no mistakes No electric shocks this way"

S is simply the input Picture this as a gated switch there is no direct conection to the permanant live that is must be fed to the coil contacts to pull in the switch for D function OR SHOULDNT BE HMMM !!

Or you can make this 24 volt out switched from the Micro controlled thermostat Easy to do this or put this together

However I see they dont tell you what S trigger voltage should be ??

NB !!!! Not good check this with manufacturer first !!

Ask "What should S highest voltage(Tigger Voltage be ) and is this directly coupled to the contactor coil Normally this is rated at 24 volts for the contactor coil The trigger voltage may be the same or it may be rated lower

Find this out first if nessary check this on a dc power supply with no connections at all for your heater and louver connections See next diagram

Next Diagram showing what I think you must check before proceeding

This is not documented clearly in the PDF datasheet

Beg your pardon it is so 12 to 240 volts into coil max 3VA rated H

owever No mention of what S MAX / MIN volts in should be

Thats a bit disturbing !! In fact is quite worrying that they havent memtioned this

Double check what is S max trigger voltage

And

Important !!

Is S isolated from the coil Should be !! I would have thought to have S isolated its probably Triac controlled So i would use opto coupler device to ensure isolation btw Stat and contactor trigger with direct coupled 12Ovac into coil

May be that if you use 24Vac in then trigger must be 24 vac in

If 120vac in then may be you have to have 120vac S trigger voltage Thats what you MUST check

FIND OUT IN ALL CASES WHAT S SHOULD BE WITH RESPCET TOP DC AND AC INPUT TO CONTACTOR COIL AND IF S IS ISLOLATED

One final point I see no mention of trigger current I would have thought that was important as well Still such is the data made available today Appauling !!

Make a point of pointing this out to them at the same time and mention this too and above all Demand the answers from them