Specifications

DRI-STEEM CRUV Electric Humidifier Installation, Operation, and Maintenance Manual • Page 31
Start-up and operation:
LW series controller
Operation
Automatic drain and flush (tap/softened water)
The LW series controller employs an electronic timer that tracks
the humidifying time of the unit. The controller activates a drain/
flush cycle when a predetermined humidifying time has elapsed
(factory default is 40 hours), and the following sequence occurs:
1. Drain valve opens, draining mineral laden water from tank.
2. Draining continues until a predetermined time has elapsed
(factory default is 10 minutes).
3. Flushing occurs during the last 10% of drain period.
Test cycling drain/flush (tap/softened water)
The dip switches on the control board can be used to test the
drain/flush cycle as follows:
1. Slide dip switches 1, 2, and 3 to OFF position, which is self test
mode.
2. Set humidistat high, so call for humidity remains for at least 15
minutes.
The following sequence occurs:
a) Drain valve opens after about two minutes, and water level
drops.
b) When water level drops below middle probe (see Figure 3-1),
fill valve opens.
c) Fill valve and drain valve remain open for drain/flush period,
then drain valve closes.
d) Water level rises to top probe, and fill valve closes.
3. When drain/flush test cycle is complete, return dip switches 1, 2,
and 3 to desired operating mode (see Table 31-1). Failure to do
so will result in a drain/flush cycle every two minutes.
Table 31-1:
Autodrain settings
Switch
Drain
time
Interval
time
123
Self test Off Off Off 10 min. 2 min.
Disabled On Off Off - -
Option Off On Off 10 min. 20 hours
Option On On Off 30 min. 20 hours
Factory
settings
Off Off On 10 min. 40 hours
Option On Off On 30 min. 40 hours
Option Off On On 10 min. 80 hours
Option On On On 30 min. 80 hours
End-of-season drain
The end-of-season drain option drains the tank
after 72 hours of no call for humidity to minimize
microbial growth inside the humidifier. When
there is a call for humidity, the tank fills and the
unit runs when the operating level is reached.
LW series controller dip switches
Drain/flush intervals of 20 hours and 80 hours
are available (factory default is 40 hours) and can
be set via dip switches on the control board (see
Figure 32-1). See the wiring diagram(s) attached
to the unit for board location and instructions
for changing the dip switch settings, and see
Table 31-1.