User's Manual

- 9 -
1. Disconnect electrical power to the furnace
and shut off water supply.
2. Disconnect the water line at the inlet
compression nut.
3. Remove the in-line strainer from inside
the inlet side of the valve by using a small
nail or wire.
4. Flush the in-line strainer clean or replace
with a new strainer, Service Department,
Part No. 4004.
5. Reconnect the inlet water line. Double
Wrench to Prevent Leaking.
6. Disconnect the water feed tube at the
outlet compression nut.
7. Inspect the water 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. Remove the orifice from the copper or
plastic water feed tube and make sure
this small opening is unplugged.
9. Replace the orifice and reconnect the water feed tube. Double Wrench
to Prevent Leaking.
10. Remove the drain line from the bottom of the humidifier. If applicable, flex it
to loosen any mineral deposits or blockages. Flush the drain line with water
under pressure to clear it of any debris, and slip it back onto the drain fitting.
If drain line does not clean properly, replace it. Inspect the drain line to make
sure it has a constant downward slope and is not flattened or blocked.
11. Turn on water supply and reconnect electrical power to the furnace.
WATER LINE INSPECTION AND SERVICE INSTRUCTIONS
NOTE: Periodic inspection and preventative maintenance of your total
heating system is important for efficient and safe operation. Your heating
contractor should include humidifier service at the same time.
All models are equipped with a water delivery system that includes a water
feed tube, in-line water strainer and orifice as shown below. These parts
should be inspected and/or cleaned periodically to assure continued proper
humidifier performance. Inspect more often if seeing “white dust”.
TABLE OF CONTENTS
PERIODIC PREVENTATIVE MAINTENANCE
INLET
COMPRESSION
NUT
INLET
SOLENOID
VALVE
ORIFICE
OUTLET
COMPRESSION
NUT
IN-LINE
STRAINER
WATER
FEED TUBE
90-1053