Frigidaire FEC180WH00 Owner's Manual page 14

FILLING WATER
When you use the cooling and humidifying function, please add
water to the water tank. Before filling the tank with water, you
must first open the knob on the tank lock, remove the tank and
slowly fill the tank with water. Once the tank is full, place it in the
original position and then re-lock the knob on the tank lock.
1. Don not let water exceed the maximum level or fall below the
minimum level.
2. Use clean tap water to fill the water tank.
There may be a slight odor or discoloration in the water tank
during first usage. This is a normal and harmless to your health.
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