SQN7... Actuators. Building Technologies HVAC Products
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1 7 84 ctuators SQN7... / SQN7... SQN74... / SQN75... SQN7... eversible electromotoric actuators for air dampers and valves of oil or gas burners of small to medium capacity. The SQN7... and this Data Sheet are intended for use by OEs which integrate the actuators in their products! Use and features ll types of actuators feature: The SQN7... actuators are designed for driving gas or air dampers of oil or gas burners of small to medium capacity, for load-dependent control of the fuel and combustion air volume: - n connection with P-P or PD controllers, such as the WF Directly via the different types of burner controls, such as LFL..., LE..., LG..., LO..., LO... - n connection with - or 2-wire control or 3-position controllers - mpact-proof and heat-resistant plastic housings - Screw terminals for the electrical connections - aintenance-free gear train, which can be disengaged - nternal position indication - Easy-to-adjust end and auxiliary switches for adjusting the switching points - ntegrated electronic circuits Holding torque: - SQN7... / SQN7... / SQN SQN74... unning time: - SQN7... / SQN7... / SQN SQN74... Direction of rotation: - SQN7... / SQN SQN7... / SQN Nm.7 Nm s 4 s counterclockwise clockwise SQN74... / SQN Fixing holes and cable entries - Equivalent to actuators of the same category made by Conectron and Berger HVC Products
2 Warning notes To avoid injury to persons, damage to property or the environment, the following warning notes should be observed! Do not interfere with or modify the actuators! ll activities (mounting, installation and service work, etc.) must be performed by qualified staff Before making any wiring changes in the connection area, completely isolate the plant from mains supply (all-polar disconnection). Ensure that the plant cannot be inadvertently switched on again and that it is indeed dead. f not observed, there is a risk of electric shock hazard Ensure protection against electric shock hazard by providing adequate protection for the connection terminals and by securing the housing cover Each time work has been carried out (mounting, installation, service work, etc.), check to ensure that wiring is in an orderly state Fall or shock can adversely affect the safety functions. Such actuators must not be put into operation, even if they do not exhibit any damage ounting notes Ensure that the relevant national safety regulations are complied with Standards and certificates Conformity to EEC directives - Electromagnetic compatibility EC (immunity) - Low-voltage directive 24/8/EC 26/95/EC SO 9: 2 Cert. 739 SO 4: 24 Cert Only valid for SQN7.xxxxx SQN7.xxxxx Disposal notes The actuators contain electrical and electronic components and must not be disposed of together with household waste. Local and currently valid legislation must be observed. 2/22
3 echanical design Housing - ade of impact-proof and heat-resistant plastic - The housing accommodates: The reversible synchronous motor with gear train, which can be disengaged The camshaft of the control section The relays, depending on the type of actuator The switches, connected to the terminals via the printed circuit board Color: SQN7... / SQN7...: Gear train housing dark-grey, cover light-grey SQN74... / SQN75...: Gear train housing black, cover black Drive motor Coupling - eversible and locking-proof synchronous motor - Drive shaft can be manually disengaged from the gear train and motor (by pressing pin «K») - utomatic reengagement djustment of switching points Position indication Electrical connections Gear train Drive shaft ounting and fixing - By means of adjustable cams - Scales beside the cams indicate the angle of the switching point - ssignment of cams to the end and auxiliary switches is color-coded (refer to «Connection diagrams») - Some of the cam feature fine adjustment; they can be adjusted with a standard screwdriver - The other cams can be adjusted manually or with the enclosed hook-spanner or a similar tool - nternally: Scale at the beginning of the camshaft on the gear train side - efer to «Technical data» - aintenance-free - ade of black-finished steel - eady fitted to the front of the gear train - Different versions available - Front of the gear train is used as the mounting surface - ctuator is secured via through-holes Special versions for fitting potentiometer Fitting a potentiometer Certain types of actuators are supplied ready prepared for fitting a potentiometer. These actuators differ from the basic type only in that the cover is higher. They are prepared for housing the potentiometer. ccessories are not required. With these types of actuators, the third digit after the dot in the actuator s type reference is an «8». Example: SQN7x.xx8xx version for fitting a potentiometer, mounted higher cover G34 With the other types of actuators which are suited for fitting a potentiometer, the higher cover G34 must be ordered (refer to «Ordering»). The required type of potentiometer is to be ordered as a separate item (refer to «Ordering»). 3/22
4 Type summary (other types of actuators available on request) Diagram Drive shaft unning time Nominal torque Holding torque S 7) elay Pot. 9) ) Length of housing ¹) Types for mains voltage / mains frequency SQN7... replaces No. ¹) No. 2) for 9 s 6) (max.) Nm Nm pcs. pcs. mm C 23 V 4) + % -5 % Hz C 5 V 3) + % -5 % Hz type ctuators SQN7 / counterclockwise rotation 8) SQN SQN SQN ) 8 SQN SQN SQN SQN SQN SQN SQN SQN ) 8 SQN ) 8 SQN SQN ) 8 SQN SQN ) 8 SQN SQN ctuators SQN7... / counterclockwise rotation 8) / UL «egistered» for use in U.S. and Canada ) SQN ctuators SQN7... / clockwise rotation 8) SQN SQN ) 8 SQN SQN SQN SQN SQN ) 8 SQN SQN ) 8 SQN SQN7.664 SQN ,5, ) 7 SQN SQN ctuators SQN7... / clockwise rotation 8) / UL «egistered» for use in U.S. and Canada ) SQN ) SQN ) SQN ) SQN ) SQN7.68 5) ) 84 SQN ) The UL-registered types of actuators also meet CE requirements are of the same basic design as the equivalent standard types The only difference between the standard versions and the UL-registered versions is the use of other materials, especially plastics. n addition, the UL-registered versions are supplied complete with an adapter for use in the U.S. and Canada (refer to «Dimensions»). 4/22
5 Type summary / cont d (other types of actuators available on request) Diagram Drive shaft ¹) No. No. unning Nominal Holding time torque torque 2) 6) S elay Pot. Length of 7) 9) ) housing ¹) for 9 (max.) s Nm Nm pcs. pcs. mm Types for mains voltage / mains frequency SQN7... replaces C 23 V 4) C 5 V 3) + % -5 % + % -5 % Hz Hz type ctuators SQN74... / counterclockwise rotation 8) 5 4,5, ) 5 SQN ) 5 SQN ) 5 SQN ctuators SQN75... / clockwise rotation 8) SQN SQN SQN SQN SQN ) 5 SQN ) 5 SQN F SQN75.2F F SQN75.4F SQN SQN ) 5 SQN SQN K ) 5 SQN75.6K42 SQN75.6K SQN ) 5 SQN ) 5 SQN Legend ¹) efer to «Dimensions» ²) t 6 Hz, running times are about 2 % shorter 3) C 5 V + % / -5 % possible, but in the case of undervoltage, torque is reduced by about 2 % 4) C 23 V + % / -5 % possible, but in the case of undervoltage, torque is reduced by about 2 % 5) On request 6) Under nominal conditions; under extreme conditions (e.g. +6 C, C 23 V 5 %) approx. 25 % 7) uxiliary switches (in addition to the 2 end switches) 8) When facing the drive shaft and when control voltage is supplied to end switch 9) Suited for direct fitting of potentiometer (refer to «Fitting a potentiometer») ) Suited for fitting potentiometer. Cover G34 to be ordered as a separate item 5/22
6 Ordering ctuator refer to «Type reference» Potentiometer SZ refer to Data Sheet N792 refer to ounting nstruction 792 ounting kit G7.3 - For mounting the SQN7... / SQN7... in place of the SQN Fitted to the SQN7... / SQN7... with a self-tapping screw (included as standard) Cover - For SQN7 / SQN7 backfitting with potentiometer SZxx.3x G34 6/22
7 Technical data General actuator data ctuator ains voltage C 23 V 5 % + % C 5 V 5 % + % ains frequency Hz ±6 % Drive motor Synchronous motor Power consumption 6 V ngular adjustment ax. 6, scale range...3 ounting position Optional Degree of protection - ll types P4 to DN 45, provided adequate cable entries and fixing screws are used - SQN74... / SQN75... Safety class - SQN7... / SQN SQN74... / SQN75... Cable entry - SQN7... / SQN SQN74... / SQN75... P2 to DN 45, provided lateral knockout hole for cable is used to DN EN 673 to DN EN 673 nsertable threaded cable gland holder for 2 x Pg9, no locknut required Openings for locknut for fixing cable glands x Pg9 x Pg Type of locknut Pg9 DN 4632 S Pg DN 4632 S Cable connections Ferrules Direction of rotation Nominal and holding torque unning times Weight (average) On time Backlash between drive motor and drive shaft - s supplied - fter 25, cycles dditional lateral knockout hole for loose introduction of 2 cables with a maximum dia. of 6 mm, cable strain relief to be provided by the user (also refer to «Degree of protection») Pg glands and locknuts are not part of the delivery Screw terminals for min..5 mm² and max. 2.5 mm² cross-sectional area atching the dia. of the stranded wire efer to «Type summary» efer to «Type summary» efer to «Type summary» pprox. 5 g 6 % max. 3 min. continuous operation.2 ±.3.5 ±.3 7/22
8 Technical data (cont d) End and auxiliary switches Number of end switches 2 Number of auxiliary switches efer to «Type summary» ctuation Via camshaft, color-coded cams (refer to «Connection diagrams») Switches with fine adjustment - SQN7... / SQN7... : and - SQN74... / SQN75... : and V Breaking voltage C V djustment of cams - Without fine adjustment - With fine adjustment nfinitely Perm. amperage at cos ϕ =.9: (values in parentheses: short-time peaks for max..5 s) Connection diagram Terminals, 2, 3, 4 Terminals 5, 6, 7 Connection diagram Terminals, 2, 6, 7 Terminals 3, 4 Connection diagram Terminals, 2, 3, 8 Terminal 4, 5 Terminal 6, 7 Connection diagram Terminals, 2, 3, 8, Terminals 4, 5, 7, Connection diagram Terminals, 3, 8 Terminal 4, 5 Terminal 6, 7 Connection diagram Terminals, 2, 3, 8 Terminal 4, 5 Terminal 6, 7 Connection diagram Terminals, 2, 3, 4, 5 Terminal 6, 7, 8 Connection diagram Terminals, 2, 3, 4, 5, 8 Terminal 6, 7 Connection diagram F Terminals Terminals, 8, 9 Connection diagram K Terminals, 2 Terminals 3, 4, 5, 6, 7, 8.5 (7 ).5 (7 ).5 2 (4 ) (7 ).5 (7 ).5 3 (4 ) (7 ).5 2 (4 ) (7 ).5 (7 ).5 (7 ).5 (7 ).5 (7 ) 8/22
9 Technical data (cont d) Environmental conditions Storage DN EN Climatic conditions Class K3 echanical conditions Class 2 Temperature range C Humidity <95 % r.h. Transport DN EN Climatic conditions Class 2K2 echanical conditions Class 22 Temperature range C Humidity <95 % r.h. Operation DN EN Climatic conditions Class 3K5 echanical conditions Class 32 Temperature range C Humidity <95 % r.h. Condensation, formation of ice and ingress of water are not permitted! Function eplacement of SQN3... / SQN3... synchronous motor drives the camshaft via a gear train. The camshaft actuates the end and auxiliary switches. Using the associated cam, the switching position of each end and auxiliary switch can be adjusted within the working range. Some of the actuator versions are equipped with electronic modules, which perform auxiliary functions in connection with the end and auxiliary switches, or with external devices, such as controllers (refer to «Connection diagrams»). The functions and technical data of both lines of actuators SQN7... / SQN7... and SQN74... / SQN75... are nearly identical. The «Type summary» contains actuators type SQN3..., which can be replaced by SQN7... / SQN7... with the help of a mounting kit (refer to «Ordering»). The SQN3... and SQN3... contained in the «Type summary» efer to the SQN7... C 23 V versions are versions with no facility for fitting a potentiometer (refer to Data Sheet N788) echanical adaptations are not normally required. To be noted are the different terminal assignments used with the 2 lines of actuators. 9/22
10 Connection diagrams The following connection diagrams show the start position as supplied: - End switch position «Closed» - Dead No. LGB22... / LGB32... / LE22... / LE23... / LG stage or modulating operation prepurging at nominal load position «NL» LGB22... / LGB32... / LE22... / LE23... / LG GP L EK2 LP L 2 Z ON Thermostat or similar unit with changeover contact (2-wire control), or 3-position controller for «on / off» positioning pulses and neutral position HS N N L Si a b2 b a2 784a4/27 SQN7x.x24xxx B V 2 V ed Blue Orange Black GP/ /W B C D Sequence diagram shows 2-stage operation LP L tw t FS 9 784d3/35 S V P NL KL Zu V V t /22
11 Connection diagrams (cont d) No. LO24... / LO25... / LO26... / LO28... / LO36... / LO24... / LO stage operation prepurging at low-fire position «KL» LO24... / LO25... / LO26... / LO28... / LO36... LO24... / LO ) ) 2) QB... OW GP OH Z ) 2) 3) Without oil preheater efer to Data Sheet N78 LO... / LO... with oil preheater: f «OW» contact opens during operation, a new start will be made L L Thermostat or similar unit with NO contact (-wire control) HS N N L Si a c b2 784a/85 B SQN7x.x44xxx b a2 C V 4 V ed Blue Orange Black GP /W B C D OH t4 OW tw t L FS 784d2/35 P S NL 4) equired position is approached 4) V V KL V 4) 4) Zu t from only one side to eliminate switching differential (compensation of backlash) /22
12 Connection diagrams (cont d) No. LGB2... / LE2... / LG stage operation prepurging at low-fire position «KL» LGB2... / LE2... / LG EK * LP Z 5 ON * Only required with LGB2... L GP L Thermostat or similar unit with NO contact (-wire control) HS N N L Si a c b2 b a2 784a2/27 B SQN7x.x44xxx C V 4 V ed Blue Orange Black GP/ /W L Z B C t D FS 784d2/35 S V P NL KL Zu V ) V ) t ) equired position is approached from only one side to eliminate switching differential (compensation of backlash) 2/22
13 Connection diagrams (cont d) No. LE22... / LE23... / LGB22... / LGB32... / LG stage operation prepurging at nominal load position «NL» LGB22... / LGB32... / LE22... / LE23... / LG GP L EK2 LP L Z ON Thermostat or similar unit with NO contact (-wire control) HS N N L Si a c b2 b a2 784a3/27 C SQN7x.x54xxx B V 5 V ed Blue Orange Black GP /W B C D LP tw t 2 L 2 FS 9 784d4/35 S V P NL KL Zu V V t 3/22
14 Connection diagrams (cont d) No. LFL... / LGK6... / LL... / LOK stage or modulating operation prepurging at nominal load position «NL» LFL... / LGK6... / LL... / LOK L Thermostat or similar unit with changeover contact or 3-position controller for «on / off» positioning pulses and neutral position * * n the case of modulating operation, fuel valve is replaced by a gas control valve «V» HS N Si N L SQN7x.x64xxx V 6 784a6/85 V ed Blue Orange Black B C D 2 Z L t Program sequence diagram shows modulating operation. V** FS 784d6/35 S ** V** V P NL KL Zu t 4/22
15 Connection diagrams (cont d) No. LO... / LO24... / LO stage operation prepurging at low-fire position «KL» LO... / LO24... / LO OW ) QB... ) efer to Data Sheets N78 and N73 GP OH Z L L Thermostat or similar unit with NO contact (-wire control) HS N N L Si c 784a7/85 C V 9 V ed Blue Orange Black SQN7x.x94xxx GP /W t t4 B C D Program sequence without oil preheater L FS ) ) 784d2/35 n the case of burner OFF, the air damper will stop at position «KL». To be noted are the heat losses that normally occur during off times. S V P NL KL Zu V V t 5/22
16 Connection diagrams (cont d) No. LFL... / LGK6... / LL... / LOK stage operation prepurging at nominal load position «NL» LFL... / LGK6... / LL... / LOK L Thermostat or similar unit with NO contact (-wire control) HS N Si N L c C SQN7x.x94xxx V 9 784a5/85 V ed Blue Orange Black B C D 2 Z L FS t 784d5/35 S V P NL KL Zu V V t 6/22
17 Connection diagrams (cont d) No. F LL... / LFL... 3-stage operation prepurging at nominal load position («ST.3») LFL... / LL W ϑ ST...3 Stage...3 ST.2 ST. LP C External auxiliary relay ϑ ST.3 C HS c BV3 N N L Si B b a 784a4/85 b2 a2 V V V F V V V ed Blue Orange Yellow Black Green SQN75.2F6xxx W B C D 2 Z ST. ST.2 S V V V ST.3 BV3 FS P ST.3 ST.2 ST. ZU t V ) ) ) V BV3 t 784d9/55 ) equired position is approached from only one side to eliminate switching differential (compensation of backlash) 7/22
18 Connection diagrams (cont d) No. Universal use N a/85 SQN7x.x3xxx ed Blue Orange No. K Universal use N N a/85 SQN7x.xK4xxx V K ed Blue Orange V Black 8/22
19 Connection diagrams (cont d) No. TG74 / TO72 2-stage operation prepurging at nominal load position «NL» TG74 / TO ) ) TO72 terminal no. 6 TG74 terminal no. 2 NL L2 N B b b a a a2 784a9/35 b SQN74.x5xxx SQN75.x5xxx a b a 2) V V 2) Cams of auxiliary switches and V rigidly connected ed Blue Orange V Orange V Black P NL KL V zu entspr. 6 * V V V 784d6/9 V V t TG... / TO... are burner controls of other manufacture. The user must check with the supplier of the TG... / TO... the proposed combination with the actuator from a safety point of view and with regard to the type of burner control used. The user will assume full responsibility for this application. Connection diagram no. corresponds to connection diagram no. of the SQN3... 9/22
20 Legend No. Number of internal diagram. ppears at the second position after the dot in the type reference / End switches / V / V uxiliary switches L emote indication of lockout (alarm) Fuel valve stage Fuel valve stage 2 BV3 Fuel valve stage 3 EK2 External remote reset button ON onization probe FS Flame signal GL Gas / air ratio controller GP Gas pressure switch HS ain switch KL Low-fire L Live conductor ir damper P ir damper position LP ir pressure switch L Load controller Burner or fan motor ctuator s synchronous motor Without postpurge 2 With postpurge N Neutral conductor NL Nominal load OH Oil preheater OW Oil preheater s readiness contact QB... Photoresistive flame detector Temperature or pressure controller elay V Control valve S ctuator Si External primary fuse, as specified in the Data Sheet of the relevant burner control Safety limiter ST... Stage t... / T... Program times (refer to the Data Sheet of the relevant burner control) TS Safety time esistance Z gnition transformer CLOSED Damper fully closed Direction of rotation OPEN Direction of rotation CLOSE Program sequence diagrams Burner ON B Startup of burner B C Burner operation / load control operation (modulating or 2-stage) C Burner OFF C D Overrun time D End of program, burner control ready for new start 2/22
21 Dimensions SQN7... / SQN7... Dimensions in mm 6 G , 6 T ø 5.3 9, me/85 6 ø 2xPg9 3) > = 65 x 3/8" adapter (Connector) for US and Canada 4) ) 84 ) 7 ) > = Drive shaft versions Side view Drife shaft versions Cross-section Drife shaft no. (refer to "Type summary" 7 8 h h9 5 +,5 6.5 h9 3 2) js ) ll drive shafts shown in end switch position «Closed» as supplied. ) Housing length depending on the type of actuator Fixing positions matched to the SQN3... (refer to «Type summary») (for -to- replacement by SQN7... / SQN7...) 2) Center groove: 6.3 mm deep requiring G7.3 Hole 5. mm dia.: 6.5 mm deep Through-hole 5.3 mm dia. (incl. center groove depth) T Knockout hole 5.3 mm dia. 3) Not included in supply 4) Supplied with actuators type SQN7x.xxxxx 5) Groove does not serve for transmission of force 2/22
22 Dimensions (cont d) SQN74... / SQN Dimensions in mm 3.5 ) Pg ) Pg ø m2e/ > = Drive shaft version Side view Drive shaft versions Cross-section Drive shaft no. (refer to "Type summary") h Drive shafts shown in «Closed» position (end switch ) Knockout hole for loose cable entry Through-hole 5.3 mm dia. Fixing positions matched to Conectron S 6 and Berger ST Pg nuts (not included in supply; for type reference, refer to «Technical data») ) Not included in supply 22/22 28 Siemens HVC Products GmbH Subject to change!
Actuators SQN7... Siemens Building Technologies HVAC Products. for air dampers and control valves of oil or gas burners
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