49
XT SERIES INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
Maintenance:
SCHEDULED MAINTENANCE
At 1000-hour intervals or when “Service interval reached”
appears in the Messages Log, inspect the steam cylinder,
fi ll and drain valves, steam hose, condensate piping,
water supply piping, drain piping, drain, and all other
parts for proper operation and cleaning requirements.
Verify proper operation of the high limit humidistat, relays,
and airfl ow proving switch.
STEAM CYLINDER SERVICE LIFE
Steam cylinder service life depends on operating hours
and water hardness. If “Check cylinder” appears in
the Messages Log during and shortly after start-up, the
message can be cleared and will stop repeating after a
few drain and fi ll cycles.
When “Check cylinder” appears in the Messages Log
after extended operation, the humidifi er will continue
to run, but the cylinder must be replaced to ensure
optimum output. Sure signs that a cylinder needs to be replaced are when it
is approximately one-third full of minerals, or minerals have bridged between
electrodes.
To replace the steam cylinder, fi rst follow the cool-down procedure below.
COOL-DOWN PROCEDURE
1. In Vapor-logic keypad/display Main menu, select Tank Status, and press
Enter.
2. Select Mode, and press Enter.
3. Select Drain, and press Enter.
4. Let steam cylinder drain for 5 to 10 minutes (drain water is automatically
tempered when drain water tempering is selected).
5. Close field-installed manual supply water shut-off valve, and allow cylinder
to continue draining.
WARNING
Shutdown procedure
To prevent severe personal injury or death from electrical
shock, follow this shutdown procedure before performing
service or maintenance procedures on this humidifi er (after
cylinder is drained and cooled):
1.
Use Vapor-logic keypad/display to drain cylinder.
2.
Use Vapor-logic controller keypad/display to change
control mode to Standby.
3.
Shut off all electrical power to humidifi er using fi eld-
installed fused disconnect, and lock all power disconnect
switches in OFF position.
Note:
Two-cylinder XT Series humidifi ers have two power
supply connections.
4.
Close fi eld-installed manual water supply shut-off valve.
WARNING
Hot water system
Cylinder and any undrained water may
be hot. To avoid injury from hot water,
follow the cool-down procedure before
proceeding with maintenance.
MAINTENANCE
Shutdown and cool-down procedures