WARNING
ELECTRIC SHOCK HAZARD.
Disconnect main electrical
power to the humidifier at the circuit breaker and drain the
water from unit before servicing. Hot surface inside.
NOTICE
• Service should be performed by an HVAC technician.
• Use only genuine replacement parts.
INSPECT HUMIDIFIER WHEN SERVICING
• Replace canister and O-ring annually
• Clean drain valve and fill valve screen annually
• Replace electrode wires every 3 years or as needed (see step 3 of
CANISTER REPLACEMENT AND DRAIN VALVE SERVICE
)
SERVICE SHUTDOWN PROCEDURE
1 . Press
On/Off
button to turn humidifier off (see
FIGURE 16
) .
2 . Allow humidifier to drain .
3 . When the green
Drain
light (see
FIGURE 16
) stops flashing,
disconnect main electrical power to humidifier at the circuit breaker .
4 . Allow the unit to cool .
5 . Shut off water supply to unit .
CANISTER REPLACEMENT AND DRAIN VALVE SERVICE
1 . Remove front panel (see
FIGURE 16
) .
2 . Pull three wires off posts on top of canister (two electrode wires
and one water level probe wire, shown in
FIGURE 17A
and
FIGURE 17B
) .
3 . Inspect the two electrode wires (see
ELECTRODE WIRE
REPLACEMENT
section for detailed instructions) .
Replace them if they are:
• Not tightly fitting
• Damaged
• Over 3 years old or age is unknown
• Have D shaped connectors (see
FIGURE 18A
)
J8
J10
CANISTER ELECTRODES
POWER
RELAY
WATER LEVEL
PROBE
ONE WIRE MUST GO THROUGH
CURRENT-SENSING TOROID
ELECTRODE
POST
90-2352
90-2736
FIGURE 16 – Steam Humidifier
FIGURE 17A –
Two Circuit Boards
FIGURE 18A –
“D” Shaped Connector
FIGURE 18B –
“O” Shaped Connector
FIGURE 17B –
One Circuit Board
1
On/Off button
and light
2
Drain light
3
Front panel
4
Side panel
5
Service light
3
4
1
2
5
MAINTENANCE
21
