Aprilaire 110 Installation

No. 10 Water Panel Evaporator Installation
120 Volts may cause serious injury from electrical shock. Disconnect power and shut off water supply before servicing.
Aprilaire Model 110
(Serial number 89414 and higher)
6
2
4
3
7
1
1. Note manual humidifier control setting and turn
dial to the "OFF" position.
2. Disconnect electrical power. Turn off water supply.
3. Disconnect: a) 120 volt electrical service.
b) Copper water supply line (1) and feed tube (2).
c) Drain line. d) 24 volt leads.
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 insert (if
used) and clean insert by flexing or using putty
knife. 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, turn up manual humidifier control and
check system operation.
16. Set manual humidifier control to its original
position.
WARNING
Aprilaire / Chippewa
Model 220
6
1
2
4
3
5
7
1. Note manual humidifier control 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 insert (if
used) and clean insert by flexing or using putty
knife. 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, turn up manual humidifier
control and check system operation.
15. Set manual humidifier control to its original
position.
Aprilaire
Models 500,
500A & 500M
1
1
5
1
2
4
3
1. Note Humidifier Control setting and turn dial to
2. Turn off water supply. Move the integral bypass
SUMMER position.
3. Press the tabs in the latches on the top and bot
(1) and pull cover off base with both hands. Set
4. Pull the plastic feed tube (2) out of the distributi
top of the Water Panel evaporator assembly (4)
out by grasping at top and tipping out.
5. Unsnap the distribution tray (5) from the scale c
Lightly scrape out or brush off any mineral depo
not to stretch or loosen the synthetic fabric line
in vinegar or a lime-removing agent is helpful w
remove stubborn mineral deposits.
6. Slide the Water Panel evaporator (7) out of the
(8). Clean the scale control insert of mineral dep
new Water Panel evaporator into the scale con
colored spot up and snap the distribution tray (5
7. Inspect the plastic feed tube (2) by gently flexin
cracks or signs of wear. Replace tube if it is crac
been damaged.
8. Reinstall the Water Panel evaporator assembly
humidifier by fitting its drain into the round rece
of the humidifier. Push the assembly in at the to
into place. Push the end of the feed tube (2) firm
distribution tray (5) and replace the front cover (
9. Remove the drain line (9) from the bottom of the
applicable, flex it to loosen any mineral deposit
Then flush it with water under pressure. If it do
clear, replace it. Slip drain line back onto the dra
sure the drain line has a constant downward slo
flattened or blocked.
10. Turn on the water supply. Return integral bypas
appropriate position.
11. Check system operation:
Manual Humidifier Control: With the furnac
turn up manual humidifier control and check sys
Automatic Humidifier Control: (Automatic o
Check system operation and reset Change Wat
by turning the knob to "Test/Reset". With furna
operating, humidifier will operate for one minut
IN TEST MODE AS HUMIDIFIER WILL NOT OPE
12. Set Humidifier Control to its original position.
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
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Water Line Ins
WATER
FEED TUB