SIT Minisit gas block 0710221

9955881-02_710_minisit_02 11-11-2003 15:56 Pagina 1 710 MINISIT MULTIFUNCTIONAL GAS CONTROL Application Main features The 710 MINISIT is suitable for Thermoelectric flame supervi- use with stoves, boilers, catering sion device. equipment and room heaters. Pressure regulator. Subject to change without notice Temperature control. Normative Reference EN 126 Multifunctional devices for gas burning appliances. 9.955.881 03 w w w . s i t g r o u p . i t 9955881-02_710_minisit_02 11-11-2003 15:56 Pagina 2 VALVE DESCRIPTION 710 MINISIT is a multi-functional control incor- PR TH GAS INLET MAIN porating thermoelectric flame supervision device BURNER FL MS GM with restart interlock, pressure regulator or flow PILOT BURNER adjuster, modulating thermostat with snap FLP RQP Fig. 1: version with pressure regulator. acting on-off function. With reference to the schematic blocks in Fig. 1 and Fig. 2: RQ TH GAS INLET MAIN • FL is the inlet filter. BURNER FL MS GM PILOT • MS is the operation push button. BURNER FLP RQP • GM is the thermoelectric flame supervision Fig. 2: version with flow adjuster. device. • FLP is the pilot filter. • RQP is the pilot flow adjuster. • PR is the pressure regulator. • RQ is the main gas flow adjuster. • TH is the modulating thermostat with on/off function with temperature selecting knob. 1 Ignition button 9 Inlet pressure test point 2 Shut-down button 10 Outlet pressure test point 3 Piezo-electric ignition button 11 Thermocouple connection (optional) 12 Pilot outlet 4 Temperature setting knob 13 Gas inlet 5 Pilot flow setting screw 14 Main gas outlet 6 Minimum flow setting screw 15 Bottom gas outlet 7 Maximum flow setting screw 16 Flange fixing holes (versions with flow adjuster) 17 Mounting holes 8 Oulet pressure setting screw 18 Thermostat bulb (versions with pressure regulator) 5 8 17 10 14 9 18 2 13 14 16 15 7 11 12 1 4 6 3 Fig. 3: version with pressure regulator Fig. 4: version with flow adjuster and piezo-electric igniter. and piezo-electric igniter. 2 9955881-02_710_minisit_02 11-11-2003 16:34 Pagina 3 GENERAL DATA CONSTRUCTION CHARACTERISTICS • Aluminium alloy body • Pressure regulator or as an alternative flow adjuster • Inline inlet and outlet (straight and elbow flange • Inlet and outlet pressure test points (optional) available) • Inlet and pilot filters • Bottom outlet (optional) • Piezo-electric igniter (optional) • Pilot gas rate adjuster • Four mounting holes USE SPECIFICATIONS • Mounting position any • Gas families I, II and III • Ambient temperature 0...80 °C • Maximum inlet pressure 50 mbar • Bending and torsion resistance Group 2 MECHANICAL CONNECTIONS • Gas inlet and outlet Rp 1/2 or Rp 3/8 ISO 7 • Pilot outlet M10x1 for tube ø6, ø4 mm, ø1/4 • Thermocouple connection M9x1 or M10x1 • Pressure test point ø9 mm • Flange fixing holes M4 x 7 mm • Mounting holes ø6.5 mm FUNCTIONS FLAME SUPERVISION • Number of cycles expected 5.000 • Ignition time (*) < 10 s • Shut-off time (*) < 60 s (*) using SIT series 200 or 290 thermocouple. PRESSURE REGULATION • Direct pressure regulator Class B • Outlet pressure setting range (optional) 3...18 mbar (15...30 mbar) • Built-in cutout device to exclude the pressure regulator (if necessary) 3 9955881-02_710_minisit_02 11-11-2003 16:36 Pagina 4 THERMOSTAT DATA A-B a b c ▲ MIN position MAX position rated flow rate 8 - 33 3 3 2 13 - 31 2 2 2 b b 13 - 38 3 3 2 13 - 48 4 4 3 ▲ ▼ ▲ ▼ 21 - 46 3 3 2 A B ▲ 30 - 100 9 9 5 sensor temperature 40 - 72 5 5 3 c a c a 40 - 80 5 5 3 100 - 340 30 30 10 Data refer EN 126 standard: a: temperature differential All the values are expressed in °C b: foot Other ranges are available on request c: modulating band CAPACITY FLOW RATE Q AS A FUNCTION OF PRESSURE DROP ∆P Q [m3/h d=0.6] 6 Gas family Q ∆P 4 I d=0.45 3.9 m /h3 5 mbar II d=0.6 3.5 m3/h 5 mbar 2 III d=1.7 4.4 m3/h 5 mbar 0 5 10…