Install Instructions

ManualsBrandsAprilaire ManualsHVAC SuppliesMaintenance Kit for 560, 560A, & 568

WARNING

120 Volts may cause serious injury from electrical shock. Disconnect power and shut off water supply before servicing.

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 – Models 350, 360, 700, 700A,

700M, 760 and 768) or Part No. 4231

(yellow – Models 560, 568, 600, 600A

and 600M) and reconnect the water

feed tube. Double Wrench to Prevent

Leaking.

10. Turn on water supply and reconnect

electrical power to the furnace.

90-1053

INLET

COMPRESSION

NUT

INLET

SOLENOID

VALVE

ORIFICE

OUTLET

COMPRESSION

NUT

IN-LINE

STRAINER

WATER

FEED TUBE

Aprilaire

Models 350 & 360

5 6

Aprilaire

Models 560 & 568

90-941

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

2. Turn off water supply. Move the integral bypass damper (10), if

present, to the SUMMER position.

3. At the side of the humidifier opposite the bypass duct, pull front cover

(1) off holding with both hands and set aside.

4. Carefully pull the feed tube (2) out of the nozzle (3) at the top of the

evaporative assembly (4). Pull this assembly out by grasping at top and

tipping out.

5. Remove the distribution tray (5) from the Water Panel evaporator

assembly (4) by unsnapping the plastic ends of the scale control insert

(8), from the tabs at the end of the tray. Follow the instructions below

depending upon the type of distribution tray in your humidifier:

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.

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

coating, but lightly scrape out any mineral deposits and clean the “V”

notches (6). 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.

6. Slide the Water Panel evaporator (7) out of the scale control insert (8).

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 (5) back into place.

7. Inspect 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. Reinstall the Water Panel evaporator assembly (4) into the humidifier

by fitting its drain into the round receptacle at the base of the

humidifier. Push the assembly in at the top against the beveled tabs

that will hold it in place. Push the end of the feed tube (2) firmly back

into the nozzle (3) and replace the front cover (1).

9. Remove the drain line (9) 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.

10. Turn on the water supply. Return integral bypass damper (10), if

present, to appropriate position.

11. Check system operation:

Manual Humidifier Control: With the furnace blower operating, turn

up manual humidifier control and check system operation.

Automatic Humidifier Control: (Automatic or Manual mode) Check

system operation by turning the knob to “Test”. With furnace blower

operating, humidifier will operate for one minute. DO NOT LEAVE IN

TEST MODE AS HUMIDIFIER WILL NOT OPERATE. For Controls with

Change Water Panel indicator light, turning knob to “Test/Reset” will

reset Change Water Panel indicator.

12. Set Humidifier Control to its original position.

1. Note manual humidifier control setting and turn dial to

the “OFF” position.

2. Disconnect electrical power (7) and turn off water supply.

3. Remove inlet grille (1) screws. Remove grille from

housing (8).

4. Lift the complete plastic framed evaporative section (9)

out of the humidifier housing.

5. Unsnap the distribution tray (2) from the scale control

insert (3). Follow the instructions below depending upon

the type of distribution tray in your humidifier. Gently pry

the distribution tray cover (4) from the tray.

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.

For trays with granular coating: Do not scrape off

the granular coating, but lightly scrape out any mineral

deposits and clean the “V” notches. 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.

6. Remove the Water Panel evaporator (5) from the scale

control insert (3). Clean the scale control insert of mineral

deposits. Install the new Water Panel evaporator. Snap

plastic cover (4) into tray and tray into scale control insert.

7. Inspect plastic 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.

8. Remove the drain line 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 (6). Make sure the drain line has a

constant downward slope and is not flattened or blocked.

9. Reinstall complete plastic framed evaporative section (9)

and inlet grille (1).

10. Reconnect electrical power (7).

11. Turn on water supply.

12. Turn up manual humidifier control and check system

operation.

13. Set manual humidifier control to its original position.

Aprilaire

Models 600,

600A & 600M

90-1076

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

2. Turn off water supply. Move the integral bypass damper (3) to the

SUMMER position.

3. Press the tabs in the latches on the top and bottom of front cover

(1) and pull cover off base with both hands. Set aside.

4. Pull the plastic feed tube (2) out of the distribution tray (5) at the

top of the Water Panel evaporator assembly (4). Pull this assembly

out by grasping at top and tipping out.

5. Unsnap the distribution tray (5) from the scale control insert (8).

Follow the instructions below depending upon the type of

distribution tray in your humidifier:

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.

For trays with granular coating: Do not scrape off the

granular coating, but lightly scrape out any mineral deposits and

clean the “V” notches (6). 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.

6. Slide the Water Panel evaporator (7) out of the scale control insert

(8). 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 (5) back into place.

7. Inspect the plastic feed tube (2) by gently flexing it and looking for

cracks or signs of wear. Replace tube if it is cracked, brittle, or has

been damaged.

8. Reinstall the Water Panel evaporator assembly (4) into the

humidifier by fitting its drain into the round receptacle at the base

of the humidifier. Push the assembly in at the top until it snaps into

place. Push the end of the feed tube (2) firmly back into the

distribution tray (5) and replace the front cover (1).

9. Remove the drain line (9) 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.

10. Turn on the water supply. Return integral bypass damper (3) to

appropriate position.

11. Check system operation:

Automatic Humidifier Control: (Automatic or Manual mode)

Check system operation by turning the knob to “Test”. With

furnace blower operating, humidifier will operate for one minute. DO

NOT LEAVE IN TEST MODE AS HUMIDIFIER WILL NOT OPERATE.

For Controls with Change Water Panel indicator light, turning knob

to “Test/Reset” will reset Change Water Panel indicator.

12. Set Humidifier Control to its original position.

90-1075

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

position.

2. Disconnect electrical power (9) and turn off water supply.

3. Unlatch humidifier front cover assembly (1) from base assembly

(2) at the bottom of the cover, lift, and set aside.

4. Pull out the water panel evaporator assembly (3) by grasping at

the top and tipping out.

5. Unsnap the distribution tray (4) from the scale control insert (7).

Follow the instructions below depending upon the type of

distribution tray in your humidifier:

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.

For trays with granular coating: Do not scrape off the

granular coating, but 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.

6. Slide the Water Panel evaporator (6) out from the scale control

insert (7). 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.

7. Inspect 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. Reinstall the Water Panel evaporator assembly (3) into the

humidifier by fitting its drain into the round receptacle at the

base of the humidifier. Push the assembly in at the top between

the retaining ribs that hold the assembly in place in a vertical

position.

9. Remove the drain line (8) from the bottom of the humidifier. If

applicable, 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.

10. Reinstall front cover assembly (1) by hooking at the top of the

base assembly (2) and latching at the bottom.

11. Reconnect electrical power (9) and turn on the water supply.

12. Check system operation:

Automatic Humidifier Control: (Automatic or Manual mode)

Check system operation by turning the knob to “Test”. With

furnace blower operating, humidifier will operate for one minute.

DO NOT LEAVE IN TEST MODE AS HUMIDIFIER WILL NOT

OPERATE. For Controls with Change Water Panel indicator light,

turning knob to “Test/Reset” will reset Change Water Panel

indicator.

13. Set Humidifier Control to its original position.

NOTE: The motor is permanently lubricated and does not

need to be oiled.

Aprilaire

Models 700,

700A, 700M,

760 & 768

No. 35 Water Panel Evaporator Installation Page 1

Summary of content (2 pages)

PAGE 1
No. 35 Water Panel Evaporator Installation Page 1 WARNING 120 Volts may cause serious injury from electrical shock. Disconnect power and shut off water supply before servicing. Aprilaire Models 350 & 360 Aprilaire Models 560 & 568 4 2 5 9 1 4 3 5 6 10 8 Aprilaire Models 600, 600A & 600M 1 4 7 3 8 7 7 6 1 1. Note manual humidifier control setting and turn dial to the “OFF” position. 2. Disconnect electrical power (7) and turn off water supply. 3. Remove inlet grille (1) screws.
PAGE 2
No. 35 Water Panel Evaporator Installation Aprilaire Models 600, 600A & 600M 4 6 8 1 7 2 8 6 7 1 ll front cover top of the ing at top and aporator control insert ctions below difier: out or brush osen the e-removing deposits. he granular clean the “V” er flow for removed, tribution tray. coating. trol insert (8). he new Water ored spot up oking for le, or has been e humidifier f the eveled tabs firmly back r. If applicable, ush it with it.