Annual Summer Shutdown; Periodic Preventative Maintenance - Aprilaire 360 Owner's Manual

ANNUAL SUMMER SHUTDOWN

1. For Models 400A, 500A, 500M, 600A and 600M close the bypass
damper, which is a part of the humidifier, with the use of the small
damper handle.
2. Shut off the water supply to the humidifier by fully closing the saddle
valve.
Humidifier Control:
Automatic Digital Humidifier Control in Automatic Mode (see Figure A):
No adjustment is necessary.
Automatic Digital Humidifier Control in Manual Mode (see Figure B):
Set the knob to the "OFF" position.
Manual Humidifier Control (see Figure C): Set the knob to the "OFF"
position.
DEALER INSTRUCTIONS FOR PREVENTATIVE MAINTENANCE
NOTE: Annual inspection and preventative maintenance of your total
heating system is important for efficient and safe operation. Call your
Aprilaire dealer for humidifier service and maintenance inspection.
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PERIODIC PREVENTATIVE MAINTENANCE

NOTE: Periodic inspection and preventative maintenance of your total
heating system is important for efficient and safe operation. Your heating
contractor should include humidifier service at the same time.
All models are equipped with a water delivery system that includes a water
feed tube, in-line water strainer and orifice as shown below. These parts
should be inspected and/or cleaned periodically to assure continued proper
humidifier performance. Inspect more often if seeing "white dust".
WATER LINE INSPECTION AND SERVICE INSTRUCTIONS
1. Disconnect electrical power to the furnace
WATER
FEED TUBE
2. Disconnect the water line at the inlet
OUTLET
COMPRESSION
NUT
3. Remove the in-line strainer from inside
ORIFICE
4. Flush the in-line strainer clean or replace
SOLENOID
VALVE
5. Reconnect the inlet water line. Double
INLET
6. Disconnect the water feed tube at the
IN-LINE
STRAINER
7. Inspect the water feed tube by gently
INLET
COMPRESSION
NUT
8. Remove the orifice from the copper or
90-1053
9. Replace the orifice and reconnect the water feed tube. Double Wrench
to Prevent Leaking.
10. Remove the drain line from the bottom of the humidifier. If applicable, flex it
to loosen any mineral deposits or blockages. Flush the drain line with water
under pressure to clear it of any debris, and slip it back onto the drain fitting.
If drain line does not clean properly, replace it. Inspect the drain line to make
sure it has a constant downward slope and is not flattened or blocked.
11. Turn on water supply and reconnect electrical power to the furnace.
and shut off water supply.
compression nut.
the inlet side of the valve by using a small
nail or wire.
with a new strainer, Service Department,
Part No. 4004.
Wrench to Prevent Leaking.
outlet compression nut.
flexing it and looking for cracks or signs of
wear. Replace tube if it is cracked, brittle,
or has been damaged.
plastic water feed tube and make sure
this small opening is unplugged.
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