55
STS INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Outdoor Enclosure
MAINTENANCE
Access to the humidifi er side cleanout plate is through the Outdoor Enclosure
electrical service door.
• Clean vent screens annually.
• Check for proper operation of strip heaters and ventilation fans annually.
• Refer to instructions for complete humidifi er maintenance, beginning on
Page 49.
WARNING
Electric shock and hot surfaces hazards
When performing maintenance on the
humidifi er:
1. Always switch the keypad control
mode to Standby.
2. Place all power disconnects in OFF
position and lock in OFF position.
3. Close the fi eld-installed manual
supply water shut-off valve.
4. Close the manual shut-off valve on
the inlet steam supply.
Table 55-1:
Outdoor Enclosure troubleshooting guide
Symptom
Possible cause
Recommended action
Fans not operating
No power
Check for power to Outdoor Enclosure.
Loose connections
Reconnect wiring or tighten.
Broken fan
Replace fan.
Heaters not operating
No power
Check for power to Outdoor Enclosure.
Loose connections
Reconnect wiring or tighten.
Broken heater
Replace heater.
Doors not sealing
Loose handles
Adjust handle.
Bad gasket
Replace gasket.
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