Watermill BP65D - Troubleshooting Common Issues; Pump Fails to Start Diagnosis; Pump Fails to Turn Off Diagnosis; Unstable Temperature or Noisy Pump

B. If the pump won’t turn off:
1. Ensure that the hot water outlet from the pump cannot flow back to the hot water
system.
2. Is the flow through the pump completely stopped?
3. Is air entrapped in the system, causing pulsing?
4. Is flow switch jammed in the up (on) position by dirt or debris?
C. Pump Pulses:
Use of other water supplies in the house can cause the pump to start momentarily. If this
is a problem contact the Watermill Helpline.
DO NOT OVERTIGHTEN RETAINING SCREWS.
D. Unstable water temperature/noisy pump.
A common cause of poor shower performance and control is air entering the pump, most
commonly from the hot water cylinder.
1. If problem persists, fit a Surrey Flange.
2. Reduce hot water temperature. The maximum recommended hot water temperature is
60°C (140°F).
3. Study the pipework layout. There should be no high points where air can collect.
4. Is debris caught in the impeller casing?
Model BP65S BP100S BP50D BP65D BP100D BP130D
ELECTRICAL
Volts/Phase/Frequency 230/1/50 230/1/50 230/1/50 230/1/50 230/1/50 230/1/50
Power Consumption (W) 400 435 525 640 850 920
Full Load Current (A) 1.7 1.9 2.3 2.8 4.0 4.3
Rating* Continuous Continuous Continuous Continuous Continuous Continuous
Enclosure IPX2 IPX2 IPX2 IPX2 IPX2 IPX2
Motor Induction Induction Induction Induction Induction Induction
MECHANICAL
Inlet Head (min-max) 1-20m 1-20m 1-20m 1-20m 1-20m 1-15m
Max Developed Pump Head 23m 31m 21m 24m 34m 41m
Max Working Pressure 6 bar 6 bar 6 bar 6 bar 6 bar 6 bar
Min starting flow rate 0.5lpm 0.5lpm 0.5lpm 0.5lpm 0.5lpm 0.5lpm
DIMENSIONS
Length (mm)
a
178 178 243 243 266 296
Width (mm) 145 145 145 145 145 145
Height (mm) 225 225 225 225 225 225
Weight (Kg) 6.1 6.1 7.5 7.5 9.5 13.7
*Recommended minimum flow rate 5lpm.
a
For pumps fitted with Y strainers add 8mm to a single ended pump and 16mm to a twin.
NOISE
The sound pressure level 1m from the pump is less than 70dbA.
TECHNICAL DATA
7
SERVICE HELPLINE Tel: (01883) 730339
WATERMILL PRODUCTS LTD
WATERMILL HOUSE, FAIRVIEW INDUSTRIAL ESTATE, HOLLAND ROAD, HURST GREEN, OXTED, SURREY, ENGLAND RH8 9BD
TEL: 01883 715425 FAX: 01883 716422
e-mail: info@watermillshowers.co.uk website: www.watermillshowers.co.uk
ML 752/A 7/04 Made in England