PWM Water Control System—details

Energy saving

Test performed with a 1.1 kW electropump and prevalence set to 30 mH2O
Flow (l/min)	Statistic use of flow	Consumption with direct insertion (kW)	Consumption with PWM (kW)	Power difference (kW)	Energy saved in one year (8760 hours) (kW-h)
5	20%	1.295	0.185	1.110	1,945
10	40%	1.388	0.555	0.833	2,917
20	20%	1.480	0.740	0.740	1,296
40	9%	1.573	1.110	0.463	365
70	6%	1.794	1.570	0.224	118
100	5%	1.850	1.850	1.000	0
Total yearly saving (kW-h)					6.641

 

Models

Model	PWM 230 1-Basic/4.3	PWM 230 1-Basic/8.5	PWM 230 3-Basic/4.5	PWM 230 D/9.3	PWM 400 D/7.5	PWM 400 D/13.3
Power supply	1 phase x 220 V				3 phase x 380 V
Pump motor type	1 phase × 220 V		3 phase × 220 V		3 phase x 380 V
Max. current	4.3 A rms	8.5 A rms	4.5 A rms	9.3 A rms	7.5 A rms	13.3 A rms
Motor power (approx.)	0.55 kW	1.1 kW	1 kW	2.2 kW	3 kW	5.5 kW
Installation position	Any	Any	Any	Any	Vertical flow	Vertical flow
Max. temperature	50°	50°	50°	45°	45°	45°
Max. pressure	8 bar	16 bar	16 bar	16 bar	16 bar	16 bar
Set pressure range	1—3.6 bar	1—6 bar	1—9 bar	1—15 bar	1—15 bar	1—15 bar
Hydraulic joint inlet	1¼" male	1¼" male	1¼" male	1¼" male	1¼" male	1¼" male
Hydraulic joint outlet	1½" female	1½" female	1½" female	1½" female	1½" female	1½" female
Protection degree	IP55	IP55	IP55	IP55	IP55	IP55
Output relay (potential free contact)	No			2 (fault; pump running)
Set point	1			2
Digital input (optocoupled)	No			1: Float switch 2: Select for 2nd set point 3: Enable
Connectivity	No			Serial interface RS485
Protection	Dry running Over current Over temperature			Dry running Over current Over temperature Voltage drop

PWM description

For more information, contact Les Cotton Pumps Ltd:

Email:
International	U.K. Local Rate
Tel: +44 1395 519664	Tel: 0845 458 2892
FAX: +44 1395 516261	Tel: 0845 458 2903
Mail: Les Cotton Pumps Ltd., 5 Bennetts Hill, Sidmouth, Devon, EX10 9XH, U.K.