MODEL 851 AIR COMPRESSOR & MODEL 855 AIR COMPRESSOR WITH WATER SEPARATOR INSTRUCTION MANUAL Sherwood Scientific Limited 1 The Paddocks Cherry Hinton Road Cambridge CB1 8DH Tel: +44 (0) 1223 243444 Fax: +44 (0) 1223 243300 Email info@sherwood-scientific.com 851 91 855 Issue 5 21 st January 2010 ECN 589 G:\DOCUMENT CONTROL\Manuals\Compressors\851 & 855 operator manual Issue 5.DOC
Contents 1.0 Introduction 3 1.1 Introduction 3 1.2 Technical Specification 3 2.0 Installation 4 2.1 Installation 4 3.0 Maintenance 5 3.1 General 5 3.2 Equipment Required 5 3.3 Inlet Filter 5 3.4 Valves and Diaphragm 6 3.5 Pressure Release Valve (M855 only) 7 3.6 Water Separator (M855 only) 7 4.0 Spares 8 4.1 Ordering Information 8 4.2 Spares 8 Warranty Statement 9 851 91 855 Issue 5 21 st January 2010 ECN 589-2 -
1 1.1 Introduction Introduction These pumps are precision units, which will give many years of service provided that the instructions on installation and operation are followed. 1.2 Technical Specification Pump Operational performance M851 6 litres/min. at 0.7 kg/cm 2 (10 lbs/in 2 ) M855 6 litres/min. at 0.7 kg/cm 2 (10 lbs/in 2 ) Free air displacement 14 litres/min (0.5ft 3 /min) 17 litres/min (0.6ft 3 /min) Maximum output pressure 1.54 kg/cm 2 (22psi) 1.9 kg/cm 2 (27psi) controlled by pressure release valve) Output connector 6.3mm (0.25 ) 6.3mm (0.25 ) Motor rating 0.2 h.p. (150W) 0.2 h.p. (150W) Speed Approx. 1400 r.p.m. Approx. 1400 r.p.m. Total weight 6.1 kg (13.5 lbs) 6.6 kg (14.6 lbs) Dimensions Height Width Length Environment Temperature Humidity 195mm (7.7 ) 135mm (5.3 ) 245mm (9.6 ) Operation 10 C to 35 C Transportation - 40 C to 45 C Operation up to 90% at 35 C Transportation 95% at 45 C 195mm (7.7 ) 225mm (8.9 ) 265mm (10.4 ) Operation 10 C to 35 C Transportation - 40 C to 45 C Operation up to 90% at 35 C Transportation 95% at 45 C 851 91 855 Issue 5 21 st January 2010 ECN 589-3 -
2 2.1 Installation Installation 2.1.1 Upon receipt, the compressor should be removed from its carton and inspected for damage. If it is damaged, contact your Sherwood Distributor. 2.1.2 Check that the voltage (V) and frequency (Hz) shown on the serial plate are suitable for the local supply. If they are not, do not use the compressor, but contact your Sherwood Distributor. 2.1.3 Connect a suitable length of 6.3mm (0.25 ) internal diameter Air Tubing (00172043) from the air outlet of the compressor to the Flame Photometer. Use the Unex Clips (00108718) supplied to secure the tubing. NOTE. Do not use rubber tubing to connect the compressor to your Flame Photometer. Rubber tubing is likely to contain French chalk and other foreign matter, which will block the atomiser. Suitable tubing is available from Sherwood Scientific; refer to Section 4. 2.1.4 A three-core mains cable with IEC plug is required to connect the compressor IEC socket to the a.c. mains supply. Fit a suitable fuse in the plug before connecting to the a.c. supply. 230V 1A HBC type 110V 2A HBC type Switch on at the mains supply socket. Adjust the Flame Photometer as necessary. 2.1.5 For the M855 connect the water inlet on the water separator to a suitable cold water supply and connect the outlet to waste, using the Unex clips supplied. Turn on the water supply so that a flow rate of approximately 0.5 litre/minute is obtained. 851 91 855 Issue 5 21 st January 2010 ECN 589-4 -
3 3.1 General Maintenance The following maintenance procedures should be carried out every 6 months. Turn off compressor and disconnect from the electrical supply and the Flame Photometer before carrying out any maintenance procedure. 3.2 Equipment Required Spanner (wrench), 1/2 (13mm) AF Adjustable spanner (wrench), 1 (25mm) AF Screwdriver, flat bladed, 7mm blade (M855) Screwdriver, cross-head (M851) 3.3 Inlet Filter 3.3.1 M851 To check the inlet filter, remove it from the circuit and note the difference, if any, in pump performance. If it is creating a severe restriction proceed as described in 1 to 4 below: - 3.3.2 M855 To check the inlet filter, switch on compressor, remove filter assembly and note the increase in output pressure on pressure gauge. If the output pressure increases by 0.21kg/cm 2 (3psi) switch off compressor and fit a replacement filter assembly as described below: - 1. Carefully remove the bottom of the filter chamber by pull down on the two tabs to overcome the friction of an O ring seal. 2. Remove the filter element noting the orientation then clean or replace as necessary. 3. To reassemble the inlet filter place the filter element inside the chamber and push the base into the end. 851 91 855 Issue 5 21 st January 2010 ECN 589-5 -
Maintenance Continued. 3.4 Valves and Diaphragm To clean or replace the valves or diaphragm proceed as follows: - 3.4.1 M851 - Remove the two screws securing the diaphragm cover and the two screws securing the filter assembly. M855 - Remove the two screws securing the diaphragm cover, the screw securing the inlet filter and the screw securing the water separator. 3.4.2 Remove the filter assembly including valve covers and water separator as appropriate. 3.4.3 Remove valves from both inlet and outlet, replace if rubbers are worn. 3.4.4 To replace the diaphragm, remove the screw in the centre of the diaphragm. 3.4.5 Remove the diaphragm and separate from the top plate and lower support. 3.4.6 Fit a new diaphragm and re-assemble following 3.4.4 and 3.4.5 in reverse order. 3.4.7 Re-assemble the compressor, replacing the valves, rubber cap up on inlet side. 3.4.8 Re diaphragm cover, filters and water separator as appropriate. 3.4.9 Connect the compressor to the Flame Photometer and then to the a.c. supply. Switch on and check the operation. 851 91 855 Issue 5 21 st January 2010 ECN 589-6 -
Maintenance Continued. 3.5 Pressure Release Valve (M855 only) 3.5.1 Slacken pressure release valve locknut. 3.5.2 With a flat bladed screwdriver unscrew adjuster and remove compression spring and ball. If the ball is difficult to remove, cover the orifice, pinch the air tube and switch on the compressor. The air pressure should move the ball. Switch off the compressor. 3.5.3 Clean the spring and ball with a soap solution. 3.5.4 Clean the valve seat with a soft cloth soaked in soap solution. CAUTION Do not use a metal probe to clean valve seat as it could damage the seat and prevent the compressor working properly. 3.5.5 Rinse valve seat, ball and spring with deionised water. 3.5.6 Replace ball, compression spring and adjuster then re tighten locknut. 3.6 Water Separator (M855 only) 3.6.1 Remove lower nut from the bottom of the water separator. 3.6.2 Ensure the orifice in the sealing plate of this nut is clear, if necessary wash with a dilute detergent solution. Exercise care when cleaning the orifice, as it must not be enlarged. 3.6.3 Withdraw the plastic filter element from the recess in the bottom of the glass bowl, wash it with a dilute detergent solution and rinse with deionised water. 3.6.4 Replace filter element and nut. 3.6.5 Remember to replace drain receptacle where necessary. 851 91 855 Issue 5 21 st January 2010 ECN 589-7 -
4.0 Spares 4.1 Ordering Information When ordering spares please give the following information to your Sherwood Distributor: - Serial Number Catalogue Number of part required Description Quantity required This will ensure that your order is dealt with quickly and efficiently. 4.2 Spares Catalogue Number Description Qty 00108595 Compressor valve kit comprising: 1 x Diaphragm 2 x Valves 2 x Valve cover gaskets 1 85008001 Inlet Filter Element 1 00172043 Air tubing, 6.3mm (0.25 ) internal diameter per metre 00108718 Unex tubing clamp 1 851 91 855 Issue 5 21 st January 2010 ECN 589-8 -
Sherwood Scientific Limited Product Warranty Statement Warranty Term: 12 Months Sherwood Scientific Ltd (Sherwood) warrants, subject to the conditions itemised within this document, through either Sherwood personnel or personnel of its authorised distributors, to repair or replace free of all charges, including labour, any part of this product which fails within the warranty time specified above, appertaining to this particular product. Such failure must have occurred because of a defect in material or workmanship and not have occurred as a result of operation of the product other than in accordance with procedures described in the instructions furnished with this product. Conditions and specific exceptions that apply to the above statement are as follows: 1. End-user warranty time commences on the date of the delivery of product to end-user premises. 2. Free of all charges statement applies only in areas recognised by Sherwood as being serviced either directly by its own personnel, or indirectly through personnel of an authorised distributor. Products purchased outside these areas requiring service during the warranty period will incur charges relative to the travel/transit costs involved. However, products purchased in such areas will be serviced during the warranty period free of all charges providing they are returned, carriage paid, to either Sherwood or by pre-arrangement to an authorised Sherwood distributor. 3. All maintenance (other than operator maintenance as described in the instructions), repairs or modifications have been made by Sherwood or Sherwood authorised personnel. 4. This product has where applicable been operated using Sherwood specified supplies and reagents. 5. Sherwood reserves the right to make any changes in the design or construction of future products of this type at any time, without incurring any obligation to make any changes whatsoever to this particular product. 6. Reagents, supplies, consumables, accessories and user maintenance items are not included in this warranty. 851 91 855 Issue 5 21 st January 2010 ECN 589-9 -
Product Warranty Statement (continued) 7. Repairs or replacement of any part failing due to abnormal conditions including the following, are excluded from this warranty: a. Flood, lightning, earthquake, tornado, hurricane, or any other natural or man-made disaster. b. Fire, bombing, armed conflict, malicious mischief or sprinkler damage. c. Physical abuse, misuse, sabotage or electrical surge. d. Damage incurred in moving the product to another location. 8. User agrees to permit Sherwood personnel or personnel of its authorised distributor to make changes in the product which do not affect results obtained, but do improve product reliability. Representations and warranties purporting to be on behalf of Sherwood made by any person, including distributors and representatives of Sherwood, which are inconsistent or in conflict with the terms of this warranty (including but not limited to the limitations of the liability of Sherwood as set forth above), shall not be binding upon Sherwood unless reduced to writing and approved by an officer of Sherwood Scientific Ltd. Except for the obligations specifically set forth in this warranty statement, in no event shall Sherwood be liable for any direct, indirect, special, incidental, or consequential damages, whether based on contract, tort or any other legal theory and whether advised of the possibility of such damages. Neither Sherwood nor any of its third party suppliers makes any other warranty of any kind, whether expressed or implied, with respect to Sherwood Products. Sherwood Scientific Ltd., 1 The Paddocks, Cherry Hinton Road, Cambridge, CB1 8DH, England 851 91 855 Issue 5 21 st January 2010 ECN 589-10 -