Ideal for Pool Managers used to PPM (parts per million) Readings
	True PPM Readings for Free Chlorine in water at concentrations from 0.1 to 10.0 ppm
	Sensor not affected by stabilized chlorine (CYA) - Assuring True Readings all the Time!
	Easy to Read
	Simple to Operate

	Easy to Install
	Simple to Use
	All Control Functions on Front Panel
	Separate Adjustable Set Points & Alarms
	Acid / Base Selector
	Proportional Feed with Adjustable Bandwidth
	Separate Adjustable Overfeed Safety Timers
	Waterproof Cabinet with Clear Window Cover
	5-year Electronics Warranty

The CHEMTROL^® 255 PPM/pH Digital Controller automatically maintains both sanitizer PPM and water pH in pools and spas.

All operating functions are clearly labeled and accessible from the front panel, with many safety and easy-reset features not found on other controllers:

	pH Calibration from 7 to 8
	PPM setpoint from 0.1 to 10.0 ppm or mg/l (or 0.01 to 2.0 optional)
	pH setpoint from 7 to 8,
	Chlorine and pH feed modes: off, manual, automatic,
	PPM and pH proportional control bandwidth from 0 to 100% of the setpoint,
	Chlorine high and low alarms from 400 to 900 mV,
	pH high and low alarms from 4 to 10,
	Chlorine overfeed safety timer from 0 to 999 minutes,
	pH overfeed safety timer from 0 to 99 minutes.

To select a function, simply press PPM or pH and then the desired function.  The display shows the current function value.  Use the UP or DOWN arrows to adjust to the desired value.

CONTROL SETPOINTS

The standard factory-set Chlorine control level is 1.0 ppm or mg/l, based on WORLD HEALTH ORGANIZATION (WHO) and NATIONAL SPA AND POOL INSTITUTE (NSPI) values for prevention of germs and bacteria. A range of 0.01 to 2.0 is also available for low chlorine level applications.

The standard factory-set pH control level is 7.5. Below 7.4, the water causes eye irritation and corrosion of equipment. Above 7.6, it also causes eye irritation plus water cloudiness, scaling, stains and reduced sanitizer efficiency.

To change the control levels, the operator presses PPM or pH and then SETPOINT. Use the UP or DOWN arrows to adjust the PPM and pH setpoints. To save the new setpoint value and exit, press SETPOINT again.

The controller then automatically activates the chemical feeders for sanitizer and acid (or soda) feed, as required to maintain the set PPM and pH levels - regardless of fluctuations in bather load, contamination and weather.  Like a thermostat maintaining a constant temperature, it prevents overfeeding or underfeeding, both of which are detrimental to good water quality.

ALARMS

When there is an alarm condition, the corresponding display flashes the alarm value:

	PPM out-of-range
	pH out-of-range,
	PPM overfeed,
	pH overfeed.

The display stops flashing when the condition is corrected. To reset the overfeed timers, turn the feed mode to off & then back to Manual or Auto.

RESET

The ideal values are set as default values.  They can be adjusted by the operator at any time.  To reset all factory default values, press PPM and pH for 5 seconds.

PPM Control	Adjustable from 0.1 to 10.0 ppm (mg/l) or 0.01 to 2.0 (specify).
pH Control	Adjustable from 4.0 to 10.0
PPM Sensor	Solid state electrode with 10-ft (3 m) cable
pH Sensor	Glass electrode with 10-ft (3 m) cable
Readouts	PPM (3 digits) and pH (2 digits) LEDs
Feed Modes	Manual, automatic, proportional
Adjustments	Setpoint, calibration, limits, feed rate
Indicators	LEDs for feed mode, feed status, alarms
Safety	Audio, visual and remote alarms Out-of-range limits and overfeed safety timers
Cabinet	Polystyrene 9x7x4 in. (22x18x10 cm)
Electrical	110V, 230V or 24 VAC (specify)
Plumbing	PVC tees for 1-1/2" or 2" line
Warranty	5 years on electronic module 1 year on all other parts

The CHEMTROL^® 255 controller is based on 20+ years of experience in pool and spa automation with over 25,000 installations worldwide. Featuring a 5-year electronics warranty, it actually pays for itself in 1 to 2 years through cost savings in operating and maintenance expenses.

Savings continue to accrue from the more efficient use of chemicals, avoiding over- and underfeeding, and from lower labor costs for water testing and repairs of damaged equipment. In particular, commercial operators save on specialty chemicals, customer complaints and health department shutdowns.

	Residential Pools & Spas
	Commercial Pools & Spas
	- Hotels, Motels
	- Health Clubs
	- Apartment and Condo Pools

Part #	Description	Price	Order
Chem255	Chemtrol 255 pH and PPM Chemical Controller	3,169.00