A method for channeling hot/warm working fluid includes coupling a first fluid supply path in flow communication with an inlet of a first transparent fluid reservoir to a fluid inlet valve, coupling an outlet of the first transparent fluid reservoir in flow communication to a fluid outlet supply path, coupling a second fluid reservoir in flow communication with the first transparent fluid reservoir, and coupling a second fluid supply path in flow communication with an outlet of the second fluid reservoir to a fluid outlet valve. The method also includes directing working fluid of a temperature that is above a minimum threshold temperature from the fluid inlet valve to the fluid outlet supply path through the first transparent fluid reservoir, and directing working fluid of a temperature that is below the minimum threshold temperature from the first transparent fluid reservoir to the fluid outlet valve through the second fluid reservoir.