Sears 303.147012 - Manual (Page 9)

SPLASH INSIDE HUMIDIFIER:
This humidifier depends on the difference of air pressure between
the suppiy air pienum and the return air pienum to propel air
through the humidifier. Some furnaces have higher pressures than
others. This could result in air traveiing at high speed through the
humidifier. This can cause dropiets of water to be picked up and
splashed against the inside of the humidifier case. Eventuaily a
coating of lime will build up. It could, in extreme cases, cause
leaking of water from the humidifier.
TO REDUCE SPLASH:
Partially close the damper located in the collar on the return air
plenum. Some experimenting may be necessary to find the proper
setting.
maintenance
CLEANING AND SERVICE INSTRUCTIONS:
CAUTION: Before performing service, inspection, or
maintenance:
П
1
□ 2
□ 3
Turn off electricity at furnace, humidifier, and humidistat.
Turn off water at humidifier saddle valve.
Wear safety glasses.
This humidifier is an appliance that evaporates water in large quan­
tities. The dissolved minerals normally found in tap water in vary­
ing degrees are left as lime deposits on the media pad and other
parts in contact with the water. Deposit build-up will reduce hu­
midifier output. Annual cleaning and replacement of the media
pad is recommended. Since water conditions vary, it may be nec­
essary to service more or less often. Establish your own service
schedule. Ease of service has been foremost in the design of this
humidifier following the steps below:
servicing the media pad
n 1 Lift off front panel.
l
1 2
Remove media pad by lifting bottom edge up slightly
and pivoting out. Inspect and replace If badly blocked with mineral
deposits. (Media Pad available from Sears, Stock No. 42-14711.)
□ 3
If necessary, clean inside of humidifier case (especially
lower drain area) with water and vinegar solution, detergent and
water, or Sears All-Purpose Humidifier Cleaner, Stock No. 42-14713.
ni 4
Install media pad by sliding top edge up and pivot­
ing bottom edge into position.
□ 5
Replace front panel.
Q 6 Turn on water and electricity and test operation by
observing if water is flowing to drain while furnace is running and
humidistat is set to “test” position.
n 7
Set humidistat according to outdoor temperature as
instructed on operating instruction label. Unit is back in operation.
periodic preventative
maintenance
Periodic inspection and preventative maintenance of these com­
ponents is important for continued, efficient operation of the hu­
midifier. Refer to exploded view for location of components.
CAUTION: Be sure water and electricity are turned off
as advised above.
distribution trough
n 1
Lift off front panel.
n 2
Loosen the (2) #6 outer screws on top of the hu­
midifier. Remove and clean the distribution trough and pad set.
Replace pad set
(R. No. 35587901) if badly soiled.
n 3
Reassemble pad set and distribution trough and se­
cure with the (2) #6 screws.
drain tube
□ 1
Using spring hose clamp pliers, expand hose clamp
and remove drain tube.
n 2
Clear internal lime and calcium deposits by flexing
or striking on hard surface.
n 3
Flush with water under pressure.
n 4
Reinstall drain tube and hose clamp.
solenoid water filter
□ 1
Remove water line at solenoid.
n 2
Remove nylon elbow inlet fitting filter/orifice assem­
bly from solenoid valve by unscrewing (turn counter-clockwise).
[
3
Check for clogging by blowing through one end. If
clogged, replace with new fitting assembly. Part No. 05291201.