Installation and Maintenance
EHU-600 Series Humidifiers
21
19. Reconnect the high limit stat (if used) to terminals 3 and 23. Verify
that the high limit stat is wired so that it opens at the high limit
setpoint and is closed below this point (normally open).
20. Inspect the steam outlet piping. Verify that there are no untrapped
low spots.
21. If the dispersion tube is equipped with a drain fitting, verify that it
is working. Look at the tube mounting plate, there is an Armstrong
"A" Logo or "UP" sticker which should be pointing up. If not, the
tube will not drain properly (See Figure 21-1).
22. When using EHF-2 Fan Package units, the fan must be turned on
for steam to be generated. The fan will stay on when the humidity
demand is satisfied. See IB-96 for complete installation instructions
of the EHF-2 Fan Unit.
23. Turn power off, if humidification is not needed now.
24. Close and lock the doors, and store the key away from the unit.
Figure 21-1: Tube Mounting Plate
Dispersion
Tube
Tube
Mounting Plate
