Page 6
HCWP2 REQUIRED MAINTENANCE
Component identification for the following procedure is
listed in Figure 4.
Electric shock hazard. Can cause injury
or death. Disconnect all electrical power
supplies before servicing. Shut off wa-
ter supply before disconnecting or tap-
ping into any water supply line.
WARNING
!
1 − Disconnect main power to furnace.
2 − Make a note of the humidistat setting and turn
humidistat to the
OFF
position.
3 − Disconnect electrical power and turn off water supply.
4
− Pull the tab to release the control harness.
Disconnect the harness.
5 − Release the humidifier cover latch at the bottom of
the humidifier assembly. Swing the cover open, then
lift it away from the assembly.
6 − Grasp the tabs on the pad assembly frame and lift the
assembly out of the humdifier cabinet.
7 − Unsnap the pad assembly from the tabs on the sides
of the distribution tray. Remove the distribution tray
from the pad assembly. Lightly scrape off any mineral
deposits from the surface of the distribution tray.
8 − Slide the humidifier pad out of the frame. Twist and
flex the frame to loosen the calcium deposits on the
frame or use a putty knife to clean the frame. Replace
the humidifier pad annually or more frequently if
necessary. Slide the pad back into the frame with the
black mark facing up. Snap the distribution tray back
into place.
9 − Position the pad frame assembly so that the tabs are
pointing outward. Align the drain extension on the
pad assembly with the drain spud in the humidifier
base. Reinsert the humidifier pad assembly in the
base. Push the pad assembly in at the top until the
assembly snaps into place.
10 −Remove the drain hose from the bottom of the
humidifier. Bend and flex the hose to loosen the
internal calcium deposits. Flush the hose with water
under pressure and slip it back onto the drain spud.
The drain hose should have a constant downward
slope and must not be flattened or blocked.
11− Reinstall the front cover by hooking at the top of base
assembly and latching at the bottom.
12− Reconnect the control harness. Make sure that the
plug snaps into place.
13− Reconnect electrical power and turn on water supply.
14− Check humidifier operation:
Manual Humidistat −
Adjust humidistat to highest
setting and make sure the furnace blower is
operating.
Universal Humidistat −
Check system operation by
setting the knob to
TEST
. With furnace blower
operating and furnace calling for heat, humidifier will
operate for one minute. Press the
RESET
button on
the side of the control to reset the Change Humidifier
Pad" indicator.
13. Set manual humidistat or universal humidistat to its
original position.
FIGURE 5
HCWP2 Humidifier Parts Identification
FRONT COVER
HUMIDIFIER
BASE
HUMIDIFIER
PAD
SOLENOID
VALVE
DISTRIBUTION
TRAY
PAD ASSEMBLY
FRAME
DRAIN HOSE
POWER CORD
