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MODELS EHUMD200ABM00B, EHUMD300ABA00B
MAINTENANCE INSTRUCTIONS for HUMIDIFIER
MODELS EHUMD200ABM00B, EHUMD300ABA00B
CAUTION
Turn Humidifier Control to “OFF” or lowest setting before servicing.
Sudden operation may cause personal injury or property damage.
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1. Note Humidifier Control setting and turn dial to the “OFF” position.
2. Turn off water supply. Turn the integral bypass damper (3) to the SUMMER position.
3. Press the tabs in the latches on the top and bottom of front cover (1) and pull cover off base
with both hands. Set aside.
4. Carefully pull the plastic feed tube (2) out of the distribution tray (5) at the top of the
evaporative assembly (4). Pull this assembly out by grasping at top and tipping out.
5. Unsnap the distribution tray (5) from the scale control insert (8). 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.
6. Slide the Humidifier Pad (7) out from the scale control insert (8). Clean the scale control
insert of mineral deposits. Replace the Humidifier Pad annually with a BAYPAD01A1010A
Humidifier Pad for Model EHUMD200ABM00B and BAYPAD02A1310A Humidifier Pad for
Model EHUMD300ABA00B. Slide the Humidifier Pad back into the scale control insert with
the colored spot up and snap the distribution tray (5) back into place.
7. Inspect the plastic feed tube (2) 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 (4) into the humidifier by fitting its drain into the round
receptacle at the base of the humidifier. Push the assembly in at the top until it snaps into
place. Push the end of the feed tube (2) back firmly into the distribution tray and replace the
front cover (1).
9. Remove the drain line (9) 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 properly
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. Turn on the water supply. Return integral bypass damper (3) to appropriate position.
11. Check system operation:
Manual Humidifier Control (EHUMD200ABM00B):
With the furnace blower operating and the
furnace calling for heat, turn up Control and check system operation.
Automatic Humidifier Control (EHUMD300ABA00B):
(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.
12. Set Humidifier Control to its original position.
1. Front Cover
2. Feed Tube
3. Integral Bypass
Damper
4. Evaporative Assembly
5. Distribution Tray
6. “V” Notches
7. Humidifier Pad
8. Scale Control Insert
9. Drain Line
90-1169
MAINTENANCE INSTRUCTIONS for
HUMIDIFIER MODEL EHUMD500APA00C
MODEL EHUMD500APA00C
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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