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The temperature range of a thermostatic drain valve is normally adjustable between 43°F and 79°F.

The temperature range of a thermostatic drain valve is normally adjustable between 43°F and 79°F.

Scale is caused by ___.

Boiler ___ is a condition that occurs when a boiler is operating at or above its maximum allowable working pressure.

A(n) ___ sensor is a flame sensor that senses light frequencies that are higher than those visible to the eye.

Boiler ___ is a condition that occurs when a boiler is operating at or above its maximum allowable working pressure.

A(n) ___ test is the most accurate method of testing a low water fuel cutoff.

Additional components that may be encountered with cooling systems are liquid receivers, accumulators, and purge units.

A pressure control must be mounted in a vertical position to ensure accurate operation.

An ammonia-water chiller system commonly includes a generator, condenser, evaporator, and absorber.