Page 5
HCWB2 REQUIRED MAINTENANCE
Refer to figure 5 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 − Make sure the water supply is turned off.
4 − Slide the
latch
to release the
front cover
. Swing the
cover open, then lift it away from the assembly.
5 − Turn the
damper handle
to one of the SUMMER"
positions. 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.
6 − 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
.
7 − 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 into the frame with the black
mark facing up. Snap the
tray cover
onto the
distribution tray
. Snap the
distribution tray
back
into place.
8 − 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
humidifier pad assembly frame
in the
base
. Push the
pad assembly frame
in at the
top until it snaps into place. Replace the
front cover
.
Turn the damper handle to the WINTER" position.
9 − Remove the
drain hose
from the bottom of the
humidifier. Bend and flex the hose to loosen any
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.
10− Turn on water supply.
11− Check humidifier operation:
Manual Humidistat −
Adjust humidistat to highest
setting and make sure the furnace blower is
operating. Humidifier will operate if RH is less than
50%. Check the humidifier for leaks during operation.
Adjust, if necessary.
Universal Humidistat −
Check system operation by
setting the knob to
TEST
position. 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.
12− Set manual humidistat or universal humidistat to its
original position.
FIGURE 5
HUMIDIFIER BASE
HUMIDIFIER PAD
ASSEMBLY FRAME
(with frame tabs
pointing outward
and black mark
facing up)
SOLENOID
VALVE
DRAIN HOSE
DISTRIBUTION
TRAY
DAMPER HANDLE
WINTER/SUMMER
ADJUSTMENT LEVER
(Close damper during
summer operation)
LATCH
TABS
FRONT COVER
TRAY COVER
HCWB2 Bypass Humidifier Parts Identification
(Right side discharge orientation shown)
DRAIN SPUD
DAMPER
