FLOAT SWITCH OPERATING INSTRUCTIONS Please leave this instruction booklet with the pump as it contains maintenance and safety information (Original Instructions)
MODELS F1 20/8 INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page No Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Limits of Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PRODUCT DESCRIPTION The switch consists of a polypropylene casing, brass counterbalance weights, nylon float cord and polystyrene float. The electrical contact is made using mechanical micro switches which are suitable for operation on voltages up to 250V AC. The switch operation is achieved by the rocking motion of the arm caused by the rise and fall of the float.
TYPICAL SWITCH INSTALLATIONS High level cut out (tank filling) Fig. 1 Low level cut out (tank emptying) Fig. 2 NOTE : Different positions of float and counter balance, relevant to the operation the switch is required to carry out. Cont ...
Two switch installation (providing low level cut out protection) FLOAT SWITCH 2 NOTE:D.O.L. SWITCHING RECOMMENDED FOR MOTORS UP TO 370 WATT THAT ARE PROTECTED BY AN INTEGRAL THERMAL TRIP Fig. 3 FLOAT SWITCH 2 FLOAT SWITCH 1 N2 N1 L2 L1 N2 N1 L2 L1 FUSE L N E MOTOR SUPPLY 220/240-1PH-AC WATER SUPPLY OUTLET FLOAT SWITCH 1 WATER SUPPLY INLET Fig. 4 For installations where an erratic water supply can be a problem, two switches can be used as illustrated.
PRE-ASSEMBLY OF WEIGHTS The switch assembly includes three weights, the position of which relative to the switch assembly is important for correct functionality of the switch. a) Counterbalance weight This is the heaviest of the three (approx 112 g) and is pre-fitted at the factory as shown in Fig. 6. If ever there is a need to remove or replace this weight, it must be re-fitted with the chamfer upwards as shown in Fig. 7. Counterbalance weight (112 g) Chamfer Float weight (90 g) Fig. 6 b) Fig.
SITING OF THE SWITCH & INSTALLATION WARNINGS: When used on a sump, make sure that it is kept clean. Aggressive mediums such as concrete dust and cinders may cause damage. When installing the main float switch casing ensure the mounting holes (to suit M4 screws) are used. Do not drill the switch casing as water ingress may subsequently occur which will damage the switch.
To set switch for sump emptying: For draining a sump (low level cut out) assemble the float on the left hand side of the operating lever (as shown in Fig. 11). Float Switch Upper level stop Counterbalance weight Float weight Float Cord Stop weight Lower level stop Fig. 11 To set switch for sump filling: Assemble the float on the right hand side of the operating lever (as shown in Fig. 12). The pump will switch off when the tank is full.
To change function of switch: To change the function of the switch from sump emptying to sump filling or vice versa, proceed as follows:- Switch lever Counterbalance weight support clip Fig. 13 Float cord support clip The counterbalance weight and float assembly must be interchanged. This is done by manoeuvring both component support clips to the position where easy exit is provided on the switch lever. Re-assembly is the reversal of this procedure.
Earthing WARNING: Earthing continuity between the supply cords to and from the switch must be maintained. The switch is provided with internal earthing terminals which are suitable for the connection of the earthing conductors within the flexible supply cords. Wiring The switch is provided with a set of terminals which allow the connection of flexible supply cords. The supply cords should be of the PCP rubber insulated type (HO5RN-F) which is suitable for a wet environment.
Wiring Diagrams WIRING DIAGRAM OF F1 MK4 FLOAT SWITCH D.O.L. SWITCHING OF SINGLE PHASE MOTOR Fig. 16 WIRING DIAGRAM OF F1 MK4 FLOAT SWITCH C/W STARTER AND SINGLE PHASE MOTOR Fig. 17 Cont ...
Wiring Diagrams Cont. WIRING DIAGRAM OF F1 MK4 FLOAT SWITCH C/W STARTER AND THREE PHASE MOTOR Fig. 18 MAINTENANCE 1. No routine maintenance of the switch unit is required, although dependent upon conditions, a periodical clean of the float and cord should ensure trouble free operation. 2. Isolate electricity supply before attempting maintenance. STORAGE If this product is not installed immediately on receipt, ensure that it is stored in a cool dry place.
YOUR 1 YEAR GUARANTEE Stuart Pumps are guaranteed by Stuart Turner Limited to be free from defects in materials or workmanship for the applicable guarantee period from the date of purchase. The applicable guarantee period is stated in the installation booklet supplied with the pump. Within the guarantee period we will repair, free of charge, any defects in the pump resulting from faults in material or workmanship, repairing, exchanging parts or exchanging the whole unit as we may reasonably decide.
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DECLARATION OF CONFORMITY 2006/95/EC BS EN 60335-1, BS EN 60204-1 1999/519/EC BS EN 62233 2011/65/EU IT IS HEREBY CERTIFIED THAT THE STUART FLOAT SWITCH COMPLIES WITH THE ESSENTIAL REQUIREMENTS OF THE ABOVE E.E.C. DIRECTIVE AND STANDARDS. RESPONSIBLE PERSON AND MANUFACTURER Signed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . STUART TURNER LIMITED HENLEY-ON-THAMES, OXFORDSHIRE RG9 2AD ENGLAND.
