Pure Humidifier EC Series Operation Manual

1
LOGIC CONTROLLER FOR THE
EC/ECDDR WALL UNIT
System Description
The UT2000 solid state logic control board is a multi-function controller used on PURE Humidifier Co.’s
“EC” & “ECDDR” Series Wall Mount Humidifiers. The controller features LED indicators for system
control monitoring and troubleshooting.
Water Level Control (“EC” Series only)
When used in conjunction with PURE Humidifier’s Tri-Probe Level Sensor, the UT2000 maintains water
level between the middle and top level probes by opening the water fill valve as necessary. The
“WATER LEVEL FULL” indicator will remain ON as long as this level is maintained. Power will be shut
off to the heaters if the water level falls below the bottom probe, and turned back on automatically when
water level reaches the top probe.
Automatic Drain Operation (“EC” Series only)
The UT2000 contains three programmable timer circuits. The Duration of the drain cycle is field-
adjustable from 2 to 30 minutes in 2 minute increments. The Interval between the drain cycles is field-
adjustable from 10 to 150 hours in 10 hour increments. Also, the amount of cold water Tempering can
be adjusted from 2 to 6 minutes in 2 minute increments. NOTE: A minimum of a 10 hour drain interval
must be selected for proper operation of the drain timer circuit.
User Function Switches (“EC” Series only)
1. (Normal/Standby/Flusher) Switch:
Normal Position: This position allows the humidifier to be automatically controlled by the humidifier
control system; this is the operating position.
Standby Position: This position shuts down the humidifier control system. NOTE: MAIN POWER
STILL EXISTS within the control panel.
Flusher Position: This position will automatically flush the humidifier by energizing the fill valve for
approximately 6 to 10 minutes. NOTE: The drain valve should be electrically or manually opened if
this position is selected.
2. (Auto Drain/Manual Drain) Switch:
Auto Drain Position: When “Auto” is selected, the humidifier will automatically drain after the
preset time interval has accumulated.
Manual Drain Position: When in the “Manual” position, the drain valve is electrically opened and
the power to the heaters is removed.
NOTE: Auto Drain feature is turned OFF by the removal of Factory Test Jumper “J1”.

Pure Humidifier EC Series Specifications

General

Brand	Pure Humidifier
Model	EC Series
Category	Humidifier
Language	English