I personally guess he meant, they were wired in series. 3 220Ohm in parallel would be about 73Ohms. In series with the primary, a maximum of about 145mA through the primary would be achievable, which is really almost nothing?!?
BTW: I think it's funny, that the three resistors happen to have the same value as the three coils together

.
But I'm still puzzled by the overall figures. Namely, if the circuit was made like that, the voltage of one coil should never exceed the PIV of the diode, which is 600Volts. So if the circuit would develop any higher voltage, it would kill the diode. Sure the diode can usually withstand a bit more voltage, but not much. The voltage ratings are usually quite tight in semiconductors.
Actually Stan claimed the same in his patent description of this WFC circuit:
The diode, of course, is selected in accordance with the
maximum voltage encountered in the pulsing circuit. A 600
PIV fast switching diode, such as an NVR 1550 high speed
switching diode, has been found to be useful in the
circuit herein.
(As we know, the NVR 1550 is probably a text recognition error. Don told it was a MUR1560)
Or another statement in the same patent:
In a typical operation of the cell with a
representative water capacitor described below, at a
frequency of about 5 KHz at unipolar pulses from 0 to 650
volts at a sensed resonant condition into the resonant
cavity, conversion of about 5 gallons of water per hour
into a fuel gas will occur on average.
(in this sentence I'm still puzzled by the claim of conversion of 5 gallons of water in one hour in one such small cell. For if really that much could have been converted, he wouldn't have needed 10 WFCs of this size to power his car?!? And I would have my doubts if it's actually physically possible to generate that much gas and have the cell still working, as you would actually also have to get this gas out of the cell again. If he meant 5 gallons of gas, this would also be strange, for this, even with 10WFCs would never be enough to power a car. Maybe this was a hypothetical value, which he came upon by measuring the gas output when he just let the cell work for a short time. This would mean, it would be theoretically possible, but not be really practical, therefore he needed more cells.)
Now, if we look at the figures, you have given: A primary to sec/choke ratio of about 1:5, and a switching transistor (TIP120) which can only withstand 60Volts, you get some quite strange results. A 1:5 ratio would mean (without resonance), only 60volts (at 12v input) on the coils. With my circuits I get about a voltage magnification of 1:5 (on resonance), which would result in 300volts on the coils. Maybe by a good design you get higher here, say 10:1. Then you would have 600volts. And this would then also be the maximum of the diode. So in this relation the figures seem to fit. But this would really mean, that there was absolutely no "high" voltage in the circuit!?!?
Additionally, if we look again at the driving transistor: If the resonance-voltage-magnification-ratio would have been more than 1:4, then you would have had to protect the transistor. E.g. with a freewheeling diode, like in the patent circuit.
BTW: If there wouldn't be any resonance (capacities), the coils would now, due to the freewheeling diode also simply have this voltage ratio. E.g. if the voltage drop on the freewheeling diode would be 1.2V, then each coil would have -6Volts on it during off phase. Only due to the capacities in resonance this could be circumvented, and the freewheeling diode would then just draw quite some power again out of the resonator, which would decrease your attainable Q.
It's interesting, that the TIP120 does have an additional diode in reverse, similar to a Power-FET. This means, that an additional diode in series, like in his patent circuit would be needed, not to limit resonance during primary on.
From these figures I can only draw this conclusion: Either he didn't use high voltages in this circuit, but only to about 600volts (maybe a bit more), or he used another circuit-layout. What would have really interested me, would be, how the circuit card for the steam resonator looked alike. If the connectors were also just made for lower voltages, or if there HV-connectors were used?