Page 6
HCWP2 REQUIRED MAINTENANCE
Refer to figure 6 for parts identification when reviewing
the following procedure. Bold text indicates components
that are identified in the illustration.
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
− Make sure the main power to furnace is
disconnected.
2 − Make sure the humidistat is in the
OFF
position.
3 − Disconnect electrical power to the humidifier and
make sure that the water supply is turned off.
4
− Pull the tab to release the control harness.
Disconnect the harness.
5 − Release the
front 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 humidifier
base
.
NOTE − It may be easier to remove the frame by
pulling on the
tabs
one at a time.
7 − Unsnap the
pad assembly frame
from the sides of
the
distribution tray
. Remove the
distribution tray
from the
pad assembly frame
. Remove the
tray
cover
by pulling it straight off of the
distribution tray
.
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 pa
d annually or more frequently if
necessary. Slide the pad into the frame with the black
mark facing up. Snap the
tray cover
onto the
distribution tray
. Snap the
distribution tray
back
into place.
9 − Position the
pad assembly frame
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
pad assembly frame
in the
base
.
Push the
pad assembly frame
in at the top until it
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
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. Check the humidifier for leaks during
operation. Adjust, if necessary.
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. Check the humidifier for leaks during
operation. Adjust, if necessary.
15− Set manual humidistat or universal humidistat to its
original position.
FIGURE 6
HCWP2 Humidifier Parts Identification
FRONT COVER
BASE
HUMIDIFIER
PAD
(Black mark
facing up)
SOLENOID
VALVE
DISTRIBUTION
TRAY
PAD ASSEMBLY
FRAME
DRAIN HOSE
POWER CORD
TABS
DRAIN SPUD
LATCH
CONTROL HARNESS TAB
TRAY COVER
