Honeywell VK 8525 M 1502 U gas block

VK8525M(R) MODULATING GAS CONTROL “GASTEP” INSTRUCTION SHEET Main gas connection Connections with G 1/2” external thread fitted with nuts according to ISO 228-1 in combination with applicable sealing(s) withstand the torsion and bending stress of EN 161 group 1 Capacity Natural gas versions: 3,12 m3/h air minimum at 5 mbar pressure drop LPG versions without regulator: 1,8 m3/h air minimum at 5 mbar pressure drop LPG versions with regulator (specials): 1,2 m3/h air at specific conditions: - inlet pressure 50 mbar (nominal) - outlet pressure 16 mbar See also capacity curves on page 3. In the capacity curves, min. and max. are specified. APPLICATION Operating pressure ranges The Gastep gas control has been developed for modulating Natural gas: 15 ... 30 mbar gas fired appliances. LP gas: 25 ... 60 mbar The application of the Gastep gas control requires specific control electronics in order to fulfil the safety requirements. Maximum inlet pressure 60 mbar DESCRIPTION Timing opening time : < 1 second The Gastep gas control comprises: closing time : < 1 second - an electrically operated on/off safety valve class B - an electrically operated steppermotor based modulating Valve classification main valve Safety valve: class B - an optional integrated gas pressure regulator in Main valve: class B * accordance with class C requirement of EN 88. The Gastep gas control meets the EN 161 and the EN 88 *) The main valve is classified as safety valve class B only, if used in combination with a specific electronic system, Subject to change without notice. All rights reserved requirements. performing additional safety checks to the judgement of the notified body and meeting the requirements for safety SPECIFICATIONS electronics according EN298 ! Model VK8525M: modulating gas control without pressure Electrical data regulator Safety valve operator VK8525MR: modulating gas control with pressure regulator Opening voltage: 22 Vdc ± 1.5 Vdc Dimensions Hold voltage (regulated): 12 Vdc ± 1.5 Vdc See fig. 1. Power consumption: 4 W maximum Connection: 2.8 x 0.8 mm tabs Ambient temperature -5 ... 70°C Main valve steppermotor Supply voltage: 24 Vdc - 4/+6Vdc Power consumption: 6 W maximum Connection: JST XHDP-06V-1 1 EN1R-9184 0903RA-NE  Outlet G 1/2" Stepper motor Pressure test points Cap screw 12 hex Adjustment screw 7 hex Pressure regulator Safety operator Inlet G 1/2" Fig. 1. Dimensional drawing EN1R-9184 0903RA-NE 2  6 Qmax. 3200 L/h delta p 5 mbar Qmin. 500L/h air 5 4 Delta p in mbar Qmin. 500L/h 3 2 1 0 0 500 1000 1500 2000 2500 3000 3500 Q in L /h (air) Fig. 2. Nominal capacity curve Natural Gas (regulated versions) 6 Qmax. 1200 L/h delta p 5 mbar Qmin. 300 L/h air 5 4 Delta P in mbar Qmin. 300L/h 3 2 1 0 0 200 300 400 600 800 1000 1200 1400 Q in L /h (air) Fig. 3. Nominal capacity curve LP Gas (regulated versions) 3 EN1R-9184 0903RA-NE  • INSTALLATION With the main burner in operation, paint all pipe joints (including adapters) and gas control inlet and outlet with a rich soap and water solution or an approved leak IMPORTANT detection fluid. Take care that installer is a trained experienced • If another gas leak is detected, tighten adapter screws, service person. joints and pipe connections. Turn off gas supply before starting installation. • Replace the part if gas leak can not be stopped. Disconnect power supply to prevent electrical shock and/or equipment damage. Take care that dirt cannot enter the gas control…