Rent or borrow a generator. Many portable welders have power outlets 
also. Though I would be very reluctant to power it up without some 
assurance as to what is the needed power. Out of my expertise, but would 
seem would be able to measure the resistance of the heaters (assuming 
it's straight resistance heaters), calculate the amperage at different 
voltages, and compare wire size allowable amps. If there are no 
electronics, might be safe to power at 120 volts first. Check for local 
electrical repair, they might with a quick inspection determine what is 
appropriate for say a minimum service call charge.
> Not sure where else I can find 220V to test this.
>
> Cheers,
> -Neil.
>   
>   
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