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MAINTENANCE INSTRUCTIONS for
HUMIDIFIER MODEL *HUMD500APA00B
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1. Humidifier Cover Assembly
2. Base Assembly
3. Evaporative Assembly
4. Distribution Tray
5. ”V” Notches
6. Humidifier Pad
7. Scale Control Insert
8. Drain Line
9. Power Cord
WARNING
Disconnect Electrical Power and Shut Off Water Supply Before
Servicing. Failure to follow this warning may cause property damage, personal injury or death.
CAUTION
Turn Humidifier Control to “OFF” or lowest setting before servicing.
Sudden operation may cause personal injury or property damage.
1. Note Humidifier Control setting and turn dial to the “OFF” position.
2. Disconnect electrical power and turn off water supply.
3. Unlatch humidifier front cover assembly (1) from base assembly (2) at the bottom of the cover,
lift, and set aside.
4. Pull out the evaporative assembly (3) by grasping at the top and tipping out.
5. Unsnap the distribution tray (4) from the scale control insert (7). Follow the instructions below
depending upon the type of distribution tray in your humidifier:
For trays with a synthetic fabric liner:
Lightly scrape out or brush off any mineral deposits,
being careful not to stretch or loosen the synthetic fabric liner. Soaking the tray in vinegar or
a lime-removing agent is helpful when trying to remove stubborn mineral deposits.
For trays with granular coating: Do not scrape off the granular coating,
but lightly scrape out
any mineral deposits and clean the “V” notches (5)
.
This textured surface helps ensure even
water flow for maximum performance. If the granular coating has been removed, replace
distribution tray.
6. Slide the Humidifier Pad (6) out from the scale control insert (7). Clean the scale control insert
of mineral deposits. Replace Humidifier Pad annually with a BAYPAD02A1310A Humidifier
Pad. Slide the Humidifier Pad back into the scale control insert with the colored spot up and
snap the distribution tray (4) back into place.
7. Inspect the plastic feed tube by gently flexing it and looking for cracks or signs of wear.
Replace tube if it is cracked, brittle, or has been damaged.
8. Reinstall the evaporative assembly (3) into the humidifier by fitting its drain into the round
receptacle at the base of the humidifier. Push the assembly in at the top between the
retaining ribs that hold the assembly in place in a vertical position.
9. Remove the drain line (8) from the bottom of the humidifier. If applicable, flex it to loosen any
mineral deposits or blockage. Then flush it with water under pressure. If it does not clear,
replace it. Slip drain line back onto the drain fitting. Make sure the drain line has a constant
downward slope and is not flattened or blocked.
10. Reinstall front cover assembly (1) by hooking at the top of the base assembly (2) and latching
at the bottom.
11. Reconnect electrical power (9) and turn on the water supply.
12. Check system operation:
Automatic Humidifier Control:
(Automatic or Manual mode) Check system operation and
reset Change Humidifier Pad indicator by setting the knob to “Test/Reset”. With furnace
blower operating and furnace calling for heat, humidifier will operate for one minute. DO NOT
LEAVE IN TEST MODE AS HUMIDIFIER WILL NOT OPERATE.
13. Set Humidifier Control to its original position.
NOTE: The motor is permanently lubricated and does not need to be oiled.
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90-1075
Date
Dealer Name
SERVICE AND HUMIDIFIER PAD REPLACEMENT RECORD
