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Replace the canister annually and when prompted by the “Service” light.
Use only genuine Aprilaire Model 80 or Model 80LC canister.
1. Press “On/Off“ switch to turn humidifier off. Humidifier will drain for 4
minutes.
2. Allow humidifier to drain. When the green “Drain” LED stops flashing,
disconnect main electrical power to humidifier.
3. Remove front panel.
4. Pull 3 wires off posts on top of canister. (2 large electrode conductors
and 1 water level probe conductor.)
5. Loosen hose clamp at top of canister.
6. Slide hose off top of canister.
7. Slide canister up and out of drain assembly. Discard canister.
8. Remove O-ring from drain assembly using small screw driver.
9. Inspect drain assembly and remove any debris. See drain valve cleaning
procedure in Installation & Maintenance manual.
10. Insert new O-ring into slot in drain assembly. (O-ring is provided with
Model 80 canister.) Dampen O-ring with water before inserting canister.
Do not use oil, grease, or any lubricant besides water.
11. Make sure strainer is inserted into bottom of new canister.
12. Insert canister into drain assembly. Position canister with label facing
outward.
13. Slip steam hose over top of canister and tighten hose clamp.
14. Reattach and fully seat 3 wires to posts on top of canister. (Larger
electrode conductors are interchangeable.)
15. Replace front panel.
16. Inspect drain line to make sure it is not blocked and has constant
downward slope. Clean or replace if necessary.
17. Inspect steam hose to make sure it has no low spots and has constant
upward slope from humidifier to dispersion tube in duct. If dispersion
tube is mounted below humidifier, inspect drip tee drain.
18. Restore electrical power to humidifier.
19. Turn humidifier on and verify green “On/Off” light is illuminated.
20. See Start-up Procedure in the Installation & Maintenance Instructions.
TO REPLACE THE CANISTER TO SERVICE THE FILL VALVE
If water flow from fill valve is restricted, disconnect inlet fitting and remove
in-line strainer using small screw from inlet port. Clean or replace strainer.
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