Aprilaire 440 Caractéristiques techniques

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Maintenance Instructions:

Aprilaire Models 440, 445 & 445A

1. Note Humidifier Control setting and turn dial to the “OFF” position.

2. Disconnect electrical power and turn off water supply.

3. Remove two aluminum knobs (1). Swing top cover up and remove from

humidifier.

4. Place finger under white feed nozzle (3) at top of water distribution tray (4).

Lift up to pop feed nozzle loose from hole and notch in distribution tray.

5. Pull out the water panel evaporator assembly by grasping at the top and

tipping out.

6. Unsnap the distribution tray (4) from the scale control insert. Follow the

instructions below depending upon the type of distribution tray in your

humidifier:

a. For trays with a synthetic fabric liner: Lightly scrape out or brush off

any mineral deposits being careful not to stretch or loosen the

synthetic fabric liner. Soaking the tray in vinegar or a lime-removing

agent is helpful when trying to remove stubborn mineral deposits.

b. For trays with granular coating: Do not scrape off the granular

coating. Lightly scrape out any mineral deposits and clean the “V”

notches (5). This textured surface helps ensure even water flow for

maximum performance. If the granular coating has been removed,

place several drops of liquid dishwashing soap on the distribution tray.

This will only need to be done once if there is no granular coating.

7. Slide the Water Panel evaporator out from the scale control insert. Clean the

scale control insert of mineral deposits. Slide the new Water Panel evaporator

into the scale control insert with the colored spot up and snap the

distribution tray (4) back into place.

8. Inspect 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.

9. Reinstall the Water Panel evaporator assembly into the humidifier (with the

whole in the distribution tray toward you) by fitting its drain directly over the

round receptacle at the base of the humidifier. Push the assembly in at the

top to a vertical position. Pop feed nozzle (3) on the end of the feed tube into

hole and notch in distribution tray (4).

10. Replace top cover (2) hooking back of cover under lip of metal frame (5) and

tighten two knobs (1).

11. Remove the drain line (if applicable) from the bottom of the humidifier. Flex it

to loosen any mineral deposits or blockage. Then flush it with water under

pressure. If it does not clear, replace it. Slip drain line back onto the drain

fitting. Make sure the drain line has a constant downward slope and is not

flattened or blocked.

12. Reconnect electrical power and turn on the water supply.

13. Check system operation:

a. Manual Humidistat: With the furnace blower operating and the

furnace calling for heat, turn up humidistat and check system

operation.

b. Humidifier Control: (Automatic or Manual mode) Check system

operation and reset Change Water Panel indicator by turning the knob

to “Test/Reset.” With furnace blower operating and furnace calling for

heat, humidifier will operate for one minute. DO NOT LEAVE IN TES T

MODE AS HUMIDIFIER WILL NOT OPERATE.

14. Set humidifier Control to its original position.