Williams 2903512 Installation Instructions And Owner's Manual page 14

HUMIDIFIER: For better comfort this furnace is equipped with a humidifier. It is very
easy to use. Using a funnel, periodically add water to the small tank located on the
top left side of the furnace. Normally, the tank needs to be refilled after 4 - 5 days.
NOTE: The use of water low in limestone or distilled is advisable in order to prevent
any possible calcareous sedimentation that may be difficult to remove.
Anticalcareous tablets for humidifiers are commercially available. The humidifier
capacity is 11.8 fluid ounces (0.35 liters).
USING THE FEATURES OF YOUR
FURNACE
GREEN LAMP : It is lit when the flame is ON.
RED LAMP : In case the flame disappears, the gas flow will be shut off and the red
lamp will be lit. The furnace is locked-out. To reset the furnace, follow the instructions
above, "WHAT TO DO IF THE RED LAMP IS LIT."
MANUAL/PROGRAM BUTTON: When the button is down, the furnace keeps the
temperature set by the thermostat according to the clock's program. When the
button is up, the furnace thermostat maintains the temperature.
THERMOSTAT: Turn clockwise to increase the temperature, turn counterclockwise
to decrease it.
SUMMER/WINTER: When the button is up, the furnace will operate in heating mode
according to the thermostat and/or clock's program. When the button is down, the
appliance will provide ventilation.
MIN/MAX BUTTON: For faster heating, keep this button up. For soft heating and
silent operation, keep this button down.
HUMIDIFIER:
water filling hole
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