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9. Remove the drain line (9) from the bottom of the humidifier. If applicable, flex
it to loosen any mineral deposits or blockages. Then flush it with water under
pressure. If it does not properly clear, replace it. Slip drain line back onto the
drain fitting. Make sure the drain line has constant downward slope and is not
flattened or blocked.
10. Turn on the water supply. Return integral bypass damper (10), if present, to
appropriate position.
11. Check system operation:
a. Manual Humidifier Control: With the furnace blower operating, turn
up manual humidifier control and check system operation.
b. Automatic Humidifier Control: (Automatic or Manual mode) Check
system operation by turning the knob to "Test." With furnace blower
operating, humidifier will operate for one minute. DO NOT LEAVE IN
TEST MODE AS HUMIDIFIER WILL NOT OPERATE. For controls with
Change Water Panel indicator light, turning knob to "Test/Reset" will
reset Change Water Panel indicator.
12. Set Humidifier Control to its original position.
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