Watson-Marlow 505Di - Manual (Page 9)

9
Care and maintenance
The only scheduled maintenance required on the 505Di is to inspect the motor brushes and to replace them before their
length is less than 6mm 1/4". The life of the brushes will depend on the duty of the pump, which is expected to be at
least 10,000 hours at maximum speed. When the pump needs cleaning, remove the pumphead and use a mild solution
of detergent in water. Do not use strong solvents.
If the gearbox is rebuilt you should use 15 ml of the recommended lubricant, which is RD105, this is a SAE 30 mineral oil
loaded with molybdenum disulphide to form a soft fluid grease.
Specification
Maximum rotor speeds 220rpm, 350rpm
Voltage/frequency 100-120/220-240V 50/60Hz
Control range 220rpm; 220:1, 350rpm 175:1
Power consumption 100VA
Shaft Torque 2.2Nm
Operating temperature range 5 to 40C
Storage temperature range -40C to 70C
Weight 505Di/RL 7.5kg
Weight 505Di/L 8.9kg
Noise <70dBA at 1m
Standards IEC 335-1, EN60529 (IP31)
Machinery Directive 98/37/EC EN60204- 1
Low Voltage Directive 73/23/EEC EN61010- 1
EMC Directive:89/336/EEC EN50081-1 / EN50082-1
Specific drive performance details such as loaded drive speed variation against mains supply voltage fluctuation and drive
stability from a cold start to normal operating temperature are available on request. For further information please contact
Watson-Marlow Technical Support Department.
501RL Pumphead
The 501RL pumphead has two spring-loaded working rollers, which automatically compensate for minor variations in
tubing wall thickness, giving extended tube life. The 501RL is set during manufacture to accept tubing with wall
thicknesses of between 1.6mm and 2.0mm, and internal diameters of up to 8.0mm. It is equipped with a "tool lockable"
guard for increased safety. This should be locked shut whilst the pump is in use.
The pumphead can be run clockwise for extended tube life, or anti-clockwise to operate against higher pressures.
Flow rates
Flow rates for the 505Di were obtained using silicone tubing with the pumphead rotating clockwise, pumping water at 20C
with zero suction and delivery pressures. For critical applications determine flow rates under operating conditions.
501RL Installation
Fit the track in any one of three orientations, over the drive shaft and locating boss. Secure the track with the locating
screw. Ensure the drive shaft is degreased before locating the rotor onto the shaft via the split collet. Rotate the rotor until
its guide rollers are alligned flush to the front edge of the track. Tighten the rotor screw to a torque of 3Nm to prevent the
collet slipping during operation.
To reposition the track, swing out the crank handle to expose the rotor retaining screw. Turn the screw anticlockwise one
turn to release the collet, and withdraw the rotor from the shaft. Loosen the track locating screw, and pull the track clear.
Rotate the track to its new position and tighten the track locating screw. Use this method of removal and fitting in case
cleaning is required.
Tube loading
Isolate pump from mains supply. Unlock and open the hinged guard and swing out the rotor crank handle until it locks
into position. Select the length of tubing required, noting that approximately 240mm is required for the pumphead.
Fit one end of the tubing into one of the spring loaded clamps, and then, whilst rotating the rotor with the crank handle,
feed the tubing between the rollers and the track, aligning it within the rotor tube guides. The tubing must lie naturally
against the track and must not be twisted or stretched.