Nortec SE Series - Manual (Page 72)

69 | Maintenance and Servicing
Maintenance Shutdown and Extended Shutdown
The following procedure should be followed to shut down the humidifier for maintenance or
should it be required to disconnect power to the humidifier for a period of extended shut-down.
When performing maintenance, the SETC models include a Tank Pre-Clean feature. Tank Pre-
Clean will activate the drain pump to flush out some of minerals in the bottom of the tank, then
refill partially with cold water to cool the tank, and finally drain the contents of the tank. This
cycle will cool the tank, as well as flush out some deposits.
1 SETC - Activate Tank Pre-Clean as described in Tank Pre Clean on page 50 or press and
release the drain button to simply drain the tank. SEP - Turn the On/Off/Drain switch to
Drain.
2 SETC - If preclean was activated wait until the LCD display indicates the preclean is
complete otherwise wait until no water is coming out from the drain. SEP wait until there is
no water coming out from the drain.
3 When the tank has completed draining, turn the main power switch to “Off”. Also, shut off
the electrical power at the disconnect.
4 Close the manual shut-off valve on the steam supply.
5 Close the manual shut-off valve on the water supply line.
6 Briefly open the manual valve on the auxiliary drain line (if applicable) to drain any remaining
water.
7 The unit can now be serviced (if maintenance is being performed), or “stored” in this state
until the next humidification season. Alternatively, SETC models can be left in 3 day drain
state during an “off-season”.
8 To restart the unit follow Start Up Procedure on page 36.
Note: As long as the SETC is powered, it will automatically drain the tank when there
has not been a call for humidity for an extended period of time. This feature will
reduce or prevent the possible accumulation of algae and bacteria growing in the
tank. The tank will remain empty until there is a call for humidity at which time the fill
valve will open and refill the humidifier tank. The unit will go through its normal
process for optimum operation.