Aprilaire 112 Installation

No. 12 Water Panel Evaporator Installation
120 Volts may cause serious injury from electrical shock. Disconnect power and shut off water supply before servicing.
(Serial number 84647 and higher)
6
2
4
3
1
1. Note humidistat setting and turn dial to the "OFF" position.
2. Disconnect electrical power and turn off water supply.
3. Disconnect: a) 120 volt electrical service.
b) Copper water supply line (1) and feed tube (2).
c) Drain line (7). d) 24 volt leads (8).
4. Turn two swing locks (3), one at either side of lower housing of
humidifier flange.
5. Lift humidifier straight up until bottom of humidifier clears lip of
lower housing. Pull humidifier out at bottom, lower and remove.
6. Slide off three closure clips (4 & 5) that hold 2 halves of humidifier
together.
7. Remove upper half of humidifier. Remove water distribution pan
cover (6) and remove any mineral deposits from the "V" notches.
DO NOT scrape off granular coating from the bottom. 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.
8. Remove Water Panel evaporator and scale control insert (if used).
9. Remove Water Panel evaporator from scale control insert (if used).
Clean scale control insert of mineral deposits. If scale control insert
is not used, contact your dealer about obtaining one.
10. Install a new Water Panel evaporator, with colored spot UP, in
scale control insert (if used), or directly into the humidifier if insert is
not used. IMPORTANT: When installing scale control insert and
Water Panel evaporator into the humidifier, the insert spout must
discharge directly into the drain.
11. Remove drain line (7) from the bottom of the humidifier. If applicable,
flex it to loosen any mineral deposits or blockages. Then flush it with
water under pressure. If it does not properly 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. Following Water Panel evaporator replacement and maintenance,
reassemble humidifier.
13. Reconnect electrical power.
14. Turn on water supply.
15. Check system operation: With the furnace blower operating and the
furnace calling for heat, turn up humidistat and check system
operation.
16. Set humidistat to its original position.
Aprilaire Model 112
5
7
WARNING
Aprilaire / Chippewa
6
1
2
4
3
8
1. Note humidistat setting and turn dial to the "OFF" position.
2. Turn off water supply.
3. Remove the three "Z" clips (1) that hold the top half of
humidifier to furnace plenum.
4. Slide off four closure clips (2 & 3) that hold the two humidifier
halves together.
5. Loosen compression fitting (4) on copper feed tube (5) and
remove.
6. Remove top screw holding sheet metal ductwork to humidifier.
7. Remove top half of humidifier (lift straight up). Remove water
distribution pan cover (6) and remove any mineral deposits
from the "V" notches. DO NOT scrape off granular coating
from the bottom. 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.
8. Remove Water Panel evaporator and scale control insert
(if used).
9. Remove Water Panel evaporator from scale control insert
(if used). Clean scale control insert of mineral deposits.
If scale control insert is not used, contact your dealer about
obtaining one.
10. Install a new Water Panel evaporator, with colored spot UP,
in scale control insert (if used), or directly into the humidifier if
insert is not used. IMPORTANT: When installing scale control
insert and Water Panel evaporator into the humidifier, the
insert spout must discharge directly into the drain.
11. Remove drain line (7) from the bottom of the humidifier. If
applicable, flex it to loosen internal mineral deposits or
blockages. Then flush it with water under pressure. If it does
not properly 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. Following Water Panel evaporator replacement and
maintenance, reassemble humidifier.
13. Turn on water supply.
14. Check system operation: With the furnace blower operating
and the furnace calling for heat, turn up humidistat and check
system operation.
15. Set humidistat to its original position.
Model 224
1
5
2
4
3
7
Page 1
2
1
1
1. Note Humidifier Con
and turn dial to the "
2. Disconnect electrica
3. Remove two alumin
4. Place finger under w
nozzle loose from ho
5. Pull out the water pa
6. Unsnap the distribut
depending upon the
For trays with a sy
being careful not to
lime-removing agen
For trays with gra
out any mineral dep
water flow for maxi
drops of liquid dishw
there is no granular
7. Slide the Water Pan
of mineral deposits.
colored spot up and
8. Inspect feed tube by
cracked, brittle, or h
9. Reinstall the Water
distribution tray tow
the humidifier. Push
end of the feed tube
10. Replace top cover (2
11. Remove the drain lin
mineral deposits or
it. Slip drain line bac
slope and is not flat
12. Reconnect electrica
13. Check system oper
Manual Humidist
turn up humidistat
Humidifier Contro
Change Water Pan
operating and furna
LEAVE IN TEST MO
14. Set Humidifier Cont
NOTE: For additional
Owner's Manual.