Water Line Inspection and Service Instructions for All Models
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.
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. 4232 (blue- Model 440) or Part No. 4021 (red-Models 112 and 224) and reconnect the water feed tube. Double Wrench to Prevent Leaking.
10. Turn on water supply and reconnect electrical power to the furnace.