Powers Controls SW 786 Selector Switch
Contents
1. SIEMENS Technical Instructions Document No 155 062P25 SW 786 1 Rev 1 April 2000 Powers Controls SW 786 Selector Switch Description Features Product Numbers SW0010R1 The SW 786 Selector Switches are designed to deliver stop or redirect a pneumatic signal to air operated control devices The switch can be mounted on a panel at a remote location or close to the devices being controlled Four ports for 3 position selection Non exhausting Large Capacity LC switch available Surface or panel mounted Standard dial and nomenclature plates available Table 1 Standard Selector Switch 786 0500 Large Capacity LC Selector 786 0520 Switch Accessories Panel Mounting Kit 786 129 Surface Mounting Kit 786 130 Graphic Panel Mounting Kit 151 148 Dial Plates See Table 2 Nomenclature Plates See Table 3 Tubing Kit 786 062 Siemens Industry Inc Technical Instructions SW 786 Selector Switch Document Number 155 062P25 Rev 1 April 2000 Application The following are some typical selector switch applications The switch can be used to change the mode of control e g auto to manual day to night It can also be used for positive control e g on to off open to closed It can also be used for a combination of the two types of control e g heat to auto to cool Figure 1 shows an example of a selector used for auto manual control In the manual mode the positioning switch is used to manuall2. ber 155 062P25 Rev 1 April 2000 Operation See Table 4 and Figure 3 2 position Switch 3 position Switch Page 4 UP LEFT e RIGHT SWITCH ae a PORT CONNECTIONS ARE NUMBERED AND SHOWN WITH BROKEN LINES wo0012R1 Figure 3 Port Connections Table 4 Pointer Positions and Port Connections Knob Pointer Ports Position Connected Make tubing connections to Ports 1 2 and 3 Port 1 is the common port Knob rotation is 180 between the two switch positions Plug Port 4 to prevent a partial loss of signal in Port 1 when switching between Ports 2 and 3 If it is desirable to vent Port 1 when switching between Ports 2 and 3 leave Port 4 unplugged Turn knob approximately 90 knob pointing up this will connect Ports 1 and 4 Allow Port 1 to exhaust its signal before completing the knob rotation Make tubing connections to Ports 1 2 3 and 4 Port 1 is the common Port Knob rotation is 90 between adjacent ports Starting with the switch knob pointed to the left rotating the knob clockwise through 90 disconnects Port 1 from Port 2 and connects Port 1 to Port 4 Rotating the knob another 90 clockwise disconnects Port 1 from Port 4 and connects it to Port 3 This sequence is reversed when the knob is rotated counterclockwise The switch is non exhausting that is ports not connected are sealed off by the disc to prevent any leakage Siemens Industry Inc SW 786 Selector S
3. ev 1 April 2000 Dimensions 1 3 8 35 T oO gt DIMENSIONS IN INCHES n MILLIMETERS IN PARENTHESES Figure 9 Dimensions Information in this publication is based on current specifications The company reserves the right to make changes in specifications and models as design improvements are introduced Powers is a registered trademark of Siemens Industry Inc Product or company names mentioned herein may be the trademarks of their respective owners 2000 Siemens Industry Inc Siemens Industry Inc Your feedback is important to us If you have Document No 155 062P25 Building Technologies Division comments about this document please send them Printed in the U S A 1000 Deerfield Parkway to sbt_technical editor us sbt siemens com Page 9 Buffalo Grove IL 60089 1 847 215 1000
4. head screw 5 6 32 hex nut 6 Shake proof washer i EA 6 32 x 1 4 6 4 mm Ig screw DIMENSIONS IN INCHES MILLIMETERS IN PARENTHESES EAO a t 3 48 x 1 8 3 2 mm lg screw EO Figure 4 Surface Mounting Siemens Industry Inc Page 5 Technical Instructions SW 786 Selector Switch Document Number 155 062P25 Rev 1 April 2000 Panel Mounting Panel mounting kit 786 129 is required See Figures 5 and 6 and Table 6 1 Remove adjusting knob from switch shaft by loosening the set screw with a 5 64 inch 2 0 mm hex wrench 2 Fasten washer 2 and stop screws 1 to the mounting plate 3 3 Fasten the mounting plate to the panel with screws 4 If the panel is less than 0 106 inch 2 7 mm thick drill two 0 21 inch 5 3 mm diameter holes and use nut 5 and washer 6 4 Attach air fittings or plug to the thread ports at the rear of the switch body Port threads are 1 16 inch NPT on standard and 1 8 inch NPT on LC switch 5 Put switch shaft through the hole in the center of the mounting plate Fasten the switch to the mounting plate using screws 7 Stop screw heads must fit in recesses provided in the front surface of the switch body 6 Place dial and nomenclature plates in the recesses provided in the dial face plate 8 Attach it to the mounting plate using screws 9 7 Replace and tighten the adjusting knob to the switch shaft The installation is now complete Table 6 Panel Mo
5. ing plate Fasten the switch to the mounting panel using screws 4 Stop screw heads must fit in the recesses provided in the front surface of the switch body Tighten the clamping nut 5 Follow Step 7 of Panel Mounting If the switch knob positions don t match the markings on the panel relocate the drive screw The installation is now complete 052 1 3 DIA HOLE USE ITEM 3 AS TEMPLATE CLAMPING NUT t gt swo020R1 1 3 16 DIA MAX DIMENSIONS IN INCHES THICKNESS MILLIMETERS IN PARENTHESES 3 8 9 5 Figure 7 Graphic Panel Mounting Table 7 Graphic Panel Mounting Kit 151 148 CEE 1 Two 56 x 3 16 4 8 mm Ig screw e ET 3 mouningpas Ma 4 s ix 32 x 5 16 7 9 mm Ig screw Ez 6 Glampingnut a 6 No 11 x 1 8 3 2 mm lg drive screw EA Page 7 Technical Instructions Document Number 155 062P25 Rev 1 April 2000 SW 786 Selector Switch Construction CA SSS SW0021R1 Figure 8 Construction Table 8 Selector Switch Components em Description Quantity wara Backing disc Stainless steel 6 Disc standard switch Graphitar Disc LC switch 7 Switch body 1 Chrome plated brass pe Two 56 x 3 16 4 8 mm lg Nickel plated steel Shaft and flange assembly 1 I Page 8 Siemens Industry Inc SW 786 Selector Switch Technical Instructions Document Number 155 062P25 R
6. unting Kit 786 129 LE tem Description Two 56 x 1 4 6 4 mm Ig stop screw Mounting plate Six 32 x 1 2 13 mm Ig 100 flat head ADJUSTMENT KNOB 1 eZ AA Six 32 hex nut 6 Shake proof washer Six 32 x 1 4 6 4 mm Ig screw 8 Dial face plate 9 Three 48 x 1 3 3 2 mm lg screw SW0015R1 NOMENCLATURE PLATE Figure 5 Panel Mounting KNOB CENTER pa 2 716 gt 62 1 1116 43 3 7116 87 MINIUM CENTER TO CENTER DIMENTIONS SHOWN DIMENSIONS IN INCHES eee Re ae PANEL CUTOUT MILLIMETERS IN PARENTHESES SWO0016R1 DIMENSIONS IN INCHES MILLIMETERS IN PARENTHESES Figure 6 Panel Mounting Dimensions Page 6 Siemens Industry Inc SW 786 Selector Switch Graphic Panel Mounting PANEL CUTOUT 15 16 DIA 24 SWO019R1 Siemens Industry Inc Technical Instructions Document Number 155 062P25 Rev 1 April 2000 Graphic panel mounting kit 151 148 is required See Figure 7 and Table 7 1 2 Follow steps 1 2 and 4 of Panel Mounting Thread clamping nut 5 on the switch body Fasten the mounting plate 3 to the panel using drive screw 6 in 0 052 inch 1 3 mm diameter hole in the panel Put the switch shaft through the hole in the center of the mount
7. witch Technical Instructions Document Number 155 062P25 Rev 1 April 2000 Installation Before beginning the installation make sure you have a selector switch the appropriate mounting kit a dial plate and a nomenclature plate Surface Mounting Surface mounting kit 786 130 is required See Figure 4 and Table 5 1 8 Remove adjusting knob from switch shaft by loosening the set screw with a 5 64 inch 2 0 mm hex wrench Fasten washer 2 and stop screws 1 to the mounting plate 3 See Figure 5 for greater detail of the washer and stop screw Attach bracket 10 to the surface at the desired location Fasten the mounting plate to the panel with screws 4 nuts 5 and washers 6 Attach air fittings or plug to the thread ports at the rear of the switch body Port threads are 1 16 inch NPT on standard and 1 8 inch NPT on LC switch Put switch shaft through the hole in the center of the mounting plate Fasten the switch to the mounting plate using screws 7 Stop screw heads must fit in recesses provided in the front surface of the switch body Place dial and nomenclature plates in the recesses provided in the dial face plate 8 Attach it to the mounting plate using screws 9 Replace and tighten the adjusting knob to the switch shaft The installation is now complete al SW0018R1 14 2 56x 1 4 6 4 mm lg stop screw e e e Washer E n a ren 4 6 32 x 1 2 13 mm Ig 100 flat 124
8. y position the valve In auto mode the transmitter through the receiver controller positions the valve to maintain a set point 1 SW0011R1 l l RECEIVER CONTROLER O ied O boeeeseenees a 4 POSITIONING SELECTOR SWITCH SWITCH Figure 1 Auto Manual Application Specifications Medium Air Air Connections Standard Switch 1 16 inch NPT LC Switch 1 8 inch NPT Ambient Temperature 20 to 160 F 29 to 71 C Maximum Air Pressure 30 psig 207 kPa Air Capacity 20 psig supply and 1 psig drop Standard Switch 1200 scim 328 ml s LC Switch 2500 scim 683 ml s Materials See Table 8 Dimensions See Figure 9 Shipping Weight Standard amp LC 2 Ibs 0 91 kg Page 2 Siemens Industry Inc SW 786 Selector Switch Technical Instructions Document Number 155 062P25 Rev 1 April 2000 DIAL en PLATE As Te NOMENCLATURE Sa PLATE Accessories SW0014R1 Figure 2 Dial and Nomenclature Plates are Finished in Gray with White Letters Table 2 Dial Plates See Figure 2 i on e o on 706005 Treat f coor 76 006 Cow f ne 706 096 Cun 786 100 CLOSE AUTO OPEN 786 115 Side 1 OFF AUTO ON 786 115 Side 2 DAY AUTO NITE 786 116 Side 1 OCC AUTO UNOCC 786 116 Side 2 Table 3 Nomenclature Plates See Figure 2 Lettering On Plate Part Number Blank No Lettering 151 098 Siemens Industry Inc Page 3 Technical Instructions SW 786 Selector Switch Document Num
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