Specifications

10
START-UP AND OPERATION
Introduction
After the system has been properly installed and con-
nected to both electrical and water supplies, it may then
be started.
Start-up and Checkout Procedures
Mounting
Check mounting to see that the unit is level and securely
supported before filling with water.
Piping
Verify that all piping connections have been completed
as recommended and that water pressure is available.
Electrical
Verify that all wiring connections have been made in
accordance with all governing codes and the enclosed
VAPORMIST
®
wiring diagram.
Caution: Only qualified electrical personnel
should perform start-up procedure.
A simple three-probe conductivity sensor cycles a
solenoid-operated water fill valve to maintain the proper
water levels.
LW415
When the power is first turned on, the solenoid-operated
water fill valve will open, filling the evaporating chamber.
Filling will continue until water reaches level A, then after
a two-second delay the fill valve will close. To ensure
that a water seal is created in the overflow hose, discon-
nect probe plug and cable from probe rod assembly
(located on cover,) allowing the fill valve to re-energize
and overfill humidifier tank. This process will take only
Figure 10-1: Electronic Probe Control for
Maintaining Proper Water Level (VAPORMIST
®
Only)
B
A
OM-211
C
seconds; probe plug and cable must then be recon-
nected. A call for humidity will then energize the heating
element.
Water Refill
During operation, the water line will drop to level B. At
this time the fill valve will open, and will remain open
until the water line returns to level A.
Heater Protection
Should the water line ever drop below level C, the
heaters are de-energized and remain OFF until the
water level has been restored to level C. This feature
provides heater protection in the event of a low-water
condition.
Adjustable Surface Skimmer
Each time the evaporating chamber refills, the upper 1/
4" of water is immediately drained off through the
skimmer. This carries away the mineral residue formed
during the previous evaporating cycle. This skimming
action effectively removes most of the mineral concen-
tration in much the same way as the surface blowdown
does in a steam boiler. This simple device greatly
reduces the frequency of cleaning the evaporating
chamber.
Drain/Flush Feature
This control module contains an integral electronic timer
which tracks the humidifying time of the unit. When this
accumulated time reaches what has been set in the
timer, the drain/flush cycle is activated.
Upon activation, the following sequence occurs:
1. The drain valve opens and begins to drain water and
minerals from the evaporating chamber.
2. When the height of the water drops to the “REFILL”
level, the fill valve opens.
3. The drain and fill valves remain open for ten more
minutes, thus flushing the chamber.
4. The drain valve then closes, the chamber refills, and
the fill valve closes. The timer begins to track the
time as the unit resumes normal operation.
The electronic timer comes factory-set for drainage after
40 hours of operation time. Alternate settings of 20
hours and 80 hours can be made. See wiring
diagram(s) attached to the unit for timer board location
and instructions for changing the timer setting.
VM-IOM-1996 Scan.pdf 10 11/19/2009 9:57:23 AM