Also, define what you mean by using the term "Control Transformer". There is a difference between a "Control Power Transformer" and a standard "Dry Type Distribution Transformer". 3 phase transformers are generally Distribution Transformers, not CPTs. The difference is that CPTs are designed to be capable of delivering short duration high peak currents seen when energizing induction coils such as those found in contactors, solenoid valves etc. without saturating. If you use a DT on control loads such as that, you have to oversize the transformer much more generously than what is usually done for CPTs. If you don't, you run the risk if causing the transformer to saturate as it tries to supply the sharp increase in load, which, through a complex series of events*, causes a corresponding extreme current spike, which will incrementally damage the insulation. A 9kVA DT is capable of 16.6A FLC at 208V, you are using 14A, therefore I think if you are that loaded and turn something else on that has a coil, you are putting that transformer at risk for failure.
* That "complex series of events":
Current would increase as the transformer tries to deliver the required peak power. This would cause the core to saturate when the magnetic flux density reaches its maximum value. Once saturated, the inductive properties of the windings change. The windings don't act inductive anymore and start to look resistive. The current, which was previously controlled by the mutual induction of the windings, is now only limited by the copper wire resistance. The current would exponentially increase, overheat the windings and damage the insulation. CPTs are designed to handle this, standard 3 phase DTs are not.