Specifications

34
Sereis WT
Water Meter Feed & Bleed Control
The Series WT was designed to control the feed and bleed cycle in an open-
air cooling tower. The feed and bleed cycle is initiated and controlled by input
from a water meter. The Series WT combines everything you need to bleed
off the tower and feed inhibitor into one unique, compact package to create a
simple and cost effective metering and control system.
Principal of Operation
The Series WT includes a water meter input with program-
mable pulse timers that control the feed and bleed relays.
When the water level in the cooling tower drops, the make-up water
is turned on creating flow through the water meter. As make-up water
passes through the water meter, it generates a series of pulses based on
the volume of flow.
The Series WT has two pulse counters with independent set points that moni-
tors output of the water meter. One controls the pump and one controls the
bleed relay. When the count exceeds the set point, the counter is reset and
the control function is activated for the run-time specified at set-up.
Features
 120VAC or 250VAC @ 50/60 HZ, 5A max
 Relay rated to 5A at 240VAC
 Isolated dry contact flow switch input
 Isolated dry contact water meter input
 4 Digit LED, 9 key membrane keypad
 Single-button function keys
 Pump and bleed timers, pump and bleed counters
 Stroke rate adjusts 0-100% in 1% increments, turndown ratio 100:1
Pressure and Flow Rate Capacity
LQ02 LQ03 LQ04 LQ64
Capacity GPH 0.25 0.50 1.00 1.25
nominal GPD 6 12 24 30
(max.) LPH 0.9 1.9 3.8 4.7
Pressure PSIG 150 150 100 100
(max.) BAR 10 10 7 7
MODEL
Electronic Metering Pumps with
Integrated Controller
CM
CM
CM
CM
Engineering Data
Reproducibility:
+/- 2% at maximum capacity
Controls:
9 key membrane keypad, Single button function keys
Conductivity Sensor:
4 electrode
Conductivity Range:
0-6000 µS/cm +/- 1%, Temperature Compensated
Input:
Isolated Dry Contact Flow Switch
Isolated Dry Contact Water Meter
Functions:
Pump and Bleed Timers, Pump and Bleed Counters
Status Display:
4 Digit LED
Stroke Frequency Turn-Down Ratio:
100:1
Stroke Length Turn-Down Ratio:
100:1
Relay Ratings:
5A at 240 VAC
Power Input:
115 VAC/50-60 HZ/1 ph
230 VAC/50-60 HZ/1 ph
5 Amp max
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