Trane EHUMD800ASM00BA - Page 21

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 ELECTRO DES
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
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