Aprilaire 800 Series Maintenance Instruction

NOTICE
• Service should be performed by an HVAC technician.
• Use only genuine AprilAire replacement parts.
SERVICE SHUTDOWN PROCEDURE
1. Press On/Off button to turn humidier off (see FIGURE 1).
2. Allow humidier to drain.
3. When the green Drain light (see FIGURE 1) stops ashing,
disconnect main electrical power to humidier at the circuit
breaker.
4. Allow the unit to cool.
5. Shut off water supply to unit.
MAINTENANCE INSTRUCTIONS
Series 800
Steam Humidier
FIGURE 1: STEAM HUMIDIFIER
4
3
1
2
5
1 - On/Off button and light
2 - Drain light
3 - Front panel
4 - Side panel
5 - Service light
90-2736
FIGURE 3A:
“D” SHAPED
CONNECTOR
FIGURE 3B:
“O” SHAPED
CONNECTOR
90-2352
WATER LEVEL PROBE
J8 J10
CANISTER ELECTRODES
90-2352
SINGLE PC BOARDPOWER RELAY
POWER
RELAY
J8 J10
CANISTER ELECTRODES
90-2352
SINGLE PC BOARDPOWER RELAY
POWER
RELAY
ELECTRODE
POST
FIGURE 2A: TWO
CIRCUIT BOARDS
FIGURE 2B: ONE
CIRCUIT BOARD
ONE WIRE MUST GO THROUGH
CURRENT-SENSING TOROID
WARNING
ELECTRIC SHOCK HAZARD. Disconnect main electrical power
to the humidier at the circuit breaker and drain the water
from unit before servicing. Hot surface inside.
Humidifier
CANISTER REPLACEMENT AND DRAIN VALVE SERVICE
1. Remove front panel (see FIGURE 1).
2. Pull three wires off posts on top of canister (two electrode
wires and one water level probe wire, shown in FIGURE 2A
and FIGURE 2B).
3. Inspect the two electrode wires (see ELECTRODE WIRE
REPLACEMENT section for detailed instructions). Replace
them if they are:
• Not tightly tting
• Damaged
• Over 3 years old or age is unknown
• Have D shaped connectors (see FIGURE 3A)
4. Loosen hose clamp at top of canister. Slide steam hose off
top of canister (see FIGURE 4).
INSPECT HUMIDIFIER WHEN SERVICING
• Replace canister and O-ring annually
• Clean drain valve and ll valve screen annually
• Replace electrode wires every 3 years or as needed (see step
3 of CANISTER REPLACEMENT AND DRAIN VALVE SERVICE)

Aprilaire 800 Series Specifications

General

Type	Steam Humidifier
Installation	Professional installation recommended
Warranty	5-Year Limited Warranty
Coverage Area	Up to 6, 200 sq. ft.
Control	Automatic or manual control
Capacity	11.5, 16.0, 23.3, or 34.6 gallons per day (depending on model)
Voltage	120V or 240V (depending on model)