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No. 45 Water Panel Evaporator Installation
10010437 6.13
P.O. Box 1467 • Madison, WI 53701-1467 • Phone: 800/334-6011 • Fax: 608/257-4357 • www.aprilaire.com
B2206152A
Water Line Inspection and Service
Instructions for All Models
The humidifier is equipped with an
in-line water strainer. See the following
instructions for strainer cleaning.
90-1053
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 (plastic only) 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 with Part No. 4231 (yellow) and
reconnect the water feed tube. Double Wrench to
Prevent Leaking.
10. Turn on water supply and reconnect electrical power to
the furnace.
WATER
FEED TUBE
OUTLET
COMPRESSION
NUT
ORIFICE
SOLENOID
VALVE
INLET
IN-LINE
STRAINER
INLET
COMPRESSION
NUT
Page 2
Aprilaire Models
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1. Front Cover
2. Feed Tube
3. Integral Bypass Damper
4. Water Panel Evaporative Assembly
5. Distribution Tray
6. "V" Notches
© 2013 Aprilaire – A division of
Research Products Corporation
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