Features:

•Multifunction Keypad
•Display - Backlit LCD
•Visual and audible alarms
•Monitoring via PC
•Programmable time delays and setpoints
•All readings are field programmable for Metric or US values
•Write protected set points
•High / low pressure automatic reset
•Alarm silence
•Nonmetallic NEMA 4X enclosure
•Panel or frame mount
•Plug in terminal strips

Standard functions of the ROTrol II are to monitor and / or control:

•RO and auxiliary pump control relays
•Feed water solenoid valve
•Low feed pressure switch
•High pump pressure switch
•Permeate TDS / Conductivity
•Permeate temperature
•Membrane flush solenoid valve
•RO storage tank full switch
•RO storage tank low switch
•Pretreatment lockout
•Operating hours
•RO tank full override

Optional End Devices and Accessories:

•IEC motor starters and control transformers for motors above 1 HP.
•Pressure sensors allowing display on LCD of pressures and differential pressure with programmable setpoint for high, low, and differential pressure alarms
•Feed TDS / Conductivity sensor with TDS / Conductivity and % rejection displayed, with alarm setpoints
•Flow sensors for permeate, reject, and recirculate flow in GPM, LPM, with gallons and % recovery displayed, and alarm setpoints for low or high flow rates
•pH sensor with pH displayed, with alarm setpoints

•Relay output for permeate divert or *external alarm

•UL and C-UL listed

*Serial communication port for data acquisition, remote monitoring, and remote alarms

**Computer link for monitoring via PC

* An external alarm relay is NOT required if the ROTrol II is connected to the R&D Specialties RA-1 or one channel of the RA-6 Remote Alarm (see Remote Alarms / Annunciators)

** See the ROTrol II Communications page for details concerning data acquisition, remote display, and computer monitoring options.

Specifications

Power:
120 VAC, Optional 240 VAC, -15 + 10%, 50 / 60 Hz, 6 Watts

Environment:
-22 F to 140 F, 0 - 95% RH, Noncondensing

Enclosure:

12" x 10" x 6" (305 mm x 254 mm x 152 mm) NEMA 4X
For RO pumps requiring larger than 1 HP, a larger enclosure is offered to accept motor starters and control transformers

Display:

4 line x 20 character Backlit LCD

Switch inputs:

•Low feed pressure
•High pump pressure
•Tank full / pump OFF
•Tank full / pump ON
•Tank low
•Pretreat lockout

TDS / Conductivity Sensor:

•Permeate, 0-250 PPM or 0-250 uS, temperature compensated (other ranges available)

•Wetted parts ABS and 316 SS, 300 PSI Max, 3/4" NPT

•Permeate temperature 0-150 F / 0-65 C

Control Relays:

•RO pump control, 1 HP Max, 120/240 VAC

•Auxiliary pump control, 1 HP Max, 120/240 VAC

•Inlet Valve, 5 AMP Max, 120/240 VAC

•Flush Valve, 5 AMP Max, 120/240 VAC

Time Delays:

User programmable

Optional Sensor Inputs:

•Feed TDS / Conductivity standard range 0-2500 (other ranges available)
•Feed pressure, 0-125 PSI , ABS / 316 SS, 1/4" NPT
•Pump pressure, 0-400 or 0-1500 PSI, ABS / 316 SS, 1/4" NPT
•Pre-filter differential pressure, 0-125 PSI
•Membrane differential pressure, 0-400 or 0-1500 PSI
•pH, range 0-12, ABS, 150 PSI, 3/4" NPT
•Permeate, reject, re-circulate flow sensors (per specification)