Boiler room components 0459EN February 2018 Manual reset safety pressure switch

Transcription

1 0459EN February 08 Manual reset safety pressure switch K374Y00 Device intervention The device is activated when the preset locking pressure is reached; the heat generator stops when the electric contacts open. Reset The system can be restarted only by pushing the special reset button on the lower side of the case when the pressure drops by 0,5 bar below the setting value. Use Always avoid the following: Exceeding the expected room temperature (50 C) Exceeding the expected fluid temperature (0 C) Using unclean water Use in rooms with highly corrosive air Description Manual reset safety pressure switch to cut off the heat from the heat generator when reaching the system preset limit of maximum pressure (locking pressure). Device complying with directive PED 04/68/UE. Versions and product codes Product code Connection Control range K374Y00 /4 F 4,5 bar Technical data Fluid temperature range: 0 0 C Fluid class: Compatible fluids: water and glycol-based solutions (max. 50 %) Room temperature range: 0 50 C (RH 85 % max) Max. working pressure: 5 bar Control range: 4,5 bar Factory setting: 3 bar Reset min. differential: 0,5 bar Construction tolerance: ± 0,5 bar Nominal current: 6 A (resistive load) / 0 A (inductive load) Max. voltage: 50 V, 50/60 Hz Section of electric wires used: 0,75 4 mm² Protection class: IP44 Operation Setting The default locking pressure value is 3 bar. The value can be reset using a tool by turning the adjustment nut in the upper part of the case which includes a graduated scale on the side. CONENCTION /LOAD ADJUSTMENT NUT L N K374Y00 GRADUATED SCALE Installation The safaty pressure switch must be installed by qualified operators. The pressure switch is a device able to cut off the heat generator electric system. However, it cannot limit any pressure increase caused by heat inertia that may occur after the pressure switch is engaged. For such reason, devices preventing the pressure value from dropping below the maximum value admitted of 5 bar (es. safety valve) and the fluid temperature from dropping below 0 C (thermostat) must also be installed, in compliance with the safety standards. The pressure switch can be installed both horizontally and vertically screwing it on a /4 M (R, EN 06) threaded pipe or fitting after properly preparing the latter with oakum + putty, or PTFE, or anaerobic sealant (such materials guarantee sealing of the coupling when applied properly). The pipe connecting the pressure switch and the system must have a min. internal diameter of 8 mm if the pipe is shorter than a meter; 5 mm if the pipe is longer than a meter; 0 mm if it also serves other devices, whatever its length. The pressure switch must be installed with a n 7 wrench (recommended torque: 35 Nm). When the theoric short circuit current is greater than the max. nominal flow of the electric contacts, an electric current protection with intervention value lower or equal to 8 A must be installed before the pressure switch. Electric connections The K374Y00 pressure switch includes two electric contacts normally closed and insulated one from the other. Both contacts remain closed when the system is pressurized and both open when reaching the maximum locking pressure. LINE LINE L 50 V max. 6 (0) A N MANUAL RESET BUTTON

2 0459EN February 08 Manual reset safety pressure switch K374Y00 Start up Once installed, apply the anti-tampering seal on the adjustment screw to prevent modifications of the setting value by unauthorized people. Product specifications K374Y00 Manual reset safety pressure switch. /4 F connection. Locking pressure factory setting 3 bar. Control range: 4,5 bar. Manual reset button (differential 0,5 bar; tolerance ± 0,5 bar). Two contacts normally closed (wire section 0,75 4 mm²). Graduated scale visible from the outside. Nominal current 6 A (resistive load); 0 A (inductive load). Nominal voltage 50 V. Protection class IP44. Dimensions 04x00x60 mm (LxHxD). Room temperature range: 0 50 C. Fluid temperature range: 0 0 C. Max. working pressure: 5 bar. Complying with directive PED 04/68/UE. Before starting the pressure switch make sure: - Proper current protections have been installed where required - Electric connection has been executed in compliance with the applicable regulations - There are no water leaks from the hydraulic connection (pressure switch-system) Maintenance and inspections Every year: visual inspection to identify fluid leaks and/or corrosion. Every three years: verify proper contact opening. After every pressure switch intervention, verify there are no leaks both inside and outside the pressure switch, also removing the case. Also perform periodical mandatory inspections in compliance with the rules in force in the Country of installation. Every modification and/or repair performed on K374Y00 must be authorized in writing by Giacomini S.p.A. Failure to comply with any of the instructions above shall hold Giacomini S.p.A harmless from any civil and criminal responsibility. Dimensions B A C A [mm] B [mm] C [mm] Certifications Complying with directive PED 04/68/UE CE mark Additional information For more information, go to or contact our technical assistance service: ' * consulenza.prodotti@giacomini.com This document provides only general indications. Giacomini S.p.A. may change at any time, without notice and for technical or commercial reasons, the items included herewith. The information included in this technical sheet do not exempt the user from strictly complying with the rules and good practice standards in force. Giacomini S.p.A. Via per Alzo, San Maurizio d Opaglio (NO) Italy

3 0460EN February 08 Manual reset minimum pressure switch K374Y00 Device intervention The device is activated when the preset locking pressure is reached; the heat generator stops when the electric contacts open. Reset The system can be restarted only by pushing the special reset button on the lower side of the case when the pressure drops by 0,5 bar above the setting value. Use Always avoid the following: Exceeding the expected room temperature (50 C) Exceeding the expected fluid temperature (0 C) Using unclean water Use in rooms with highly corrosive air Description Manual reset minimum pressure switch to cut off the heat from the heat generator when reaching the system preset limit of minimum pressure (locking pressure). Device complying with directive PED 04/68/UE. Versions and product codes Product code Connection Control range K374Y00 /4 F 0,5,7 bar Technical data Fluid temperature range: 0 0 C Fluid class: Compatible fluids: water and glycol-based solutions (max. 50 %) Room temperature range: 0 50 C (RH 85 % max) Max. working pressure: 5 bar Control range: 0,5,7 bar Factory setting: 0,9 bar Reset min. differential: 0,5 bar Construction tolerance: ± 0,0 bar Nominal current: 6 A (resistive load) / 0 A (inductive load) Max. voltage: 50 V, 50/60 Hz Section of electric wires used: 0,75 4 mm² Protection class: IP44 Operation Setting The default locking pressure value is 0,9 bar. The value can be reset using a tool by turning the adjustment nut in the upper part of the case which includes a graduated scale on the side. ADJUSTMENT NUT MANUAL RESET BUTTON K374Y00 Installation The minimum pressure switch must be installed by qualified operators. The pressure switch is a device able to cut off the heat generator electric system. However, it cannot limit any pressure increase caused by heat inertia that may occur after the pressure switch is engaged. For such reason, devices preventing the pressure value from dropping below the maximum value admitted of 5 bar (es. safety valve) and the fluid temperature from dropping below 0 C (thermostat) must also be installed, in compliance with the safety standards. The pressure switch can be installed both horizontally and vertically screwing it on a /4 M (R, EN 06) threaded pipe or fitting after properly preparing the latter with oakum + putty, or PTFE, or anaerobic sealant (such materials guarantee sealing of the coupling when applied properly). The pipe connecting the pressure switch and the system must have a min. internal diameter of 8 mm if the pipe is shorter than a meter; 5 mm if the pipe is longer than a meter; 0 mm if it also serves other devices, whatever its length. The pressure switch must be installed with a n 7 wrench (recommended torque: 35 Nm). When the theoric short circuit current is greater than the max. nominal flow of the electric contacts, an electric current protection with intervention value lower or equal to 8 A must be installed before the pressure switch. Electric connections The K374Y00 pressure switch includes two electric contacts normally opened and insulated one from the other. Both contacts remain closed when the system is pressurized and both opened when reaching the minimum locking pressure. LINE LINE GRADUATED SCALE

4 0460EN February 08 Manual reset minimum pressure switch K374Y00 Start up Once installed, apply the anti-tampering seal on the adjustment screw to prevent modifications of the setting value by unauthorized people. Product specifications K374Y00 Manual reset safety pressure switch. /4 F connection. Locking pressure factory setting 0,9 bar. Control range: 0,5,7 bar. Manual reset button (differential 0,5 bar; tolerance ± 0,0 bar). Two contacts normally closed (wire section 0,75 4 mm²). Graduated scale visible from the outside. Nominal current 6 A (resistive load); 0 A (inductive load). Nominal voltage 50 V. Protection class IP44. Dimensions 04x00x60 mm (LxHxD). Room temperature range: 0 50 C. Fluid temperature range: 0 0 C. Max. working pressure: 5 bar. Complying with directive PED 04/68/UE. Before starting the pressure switch make sure: - Proper current protections have been installed where required - Electric connection has been executed in compliance with the applicable regulations - There are no water leaks from the hydraulic connection (pressure switch-system) Maintenance and inspections Every year: visual inspection to identify fluid leaks and/or corrosion. Every three years: verify proper contact opening. After every pressure switch intervention, verify there are no leaks both inside and outside the pressure switch, also removing the case. Also perform periodical mandatory inspections in compliance with the rules in force in the Country of installation. Every modification and/or repair performed on K374Y00 must be authorized in writing by Giacomini S.p.A. Failure to comply with any of the instructions above shall hold Giacomini S.p.A harmless from any civil and criminal responsibility. Dimensions B A C A [mm] B [mm] C [mm] Certifications Complying with directive PED 04/68/UE CE mark Additional information For more information, go to or contact our technical assistance service: ' * consulenza.prodotti@giacomini.com This document provides only general indications. Giacomini S.p.A. may change at any time, without notice and for technical or commercial reasons, the items included herewith. The information included in this technical sheet do not exempt the user from strictly complying with the rules and good practice standards in force. Giacomini S.p.A. Via per Alzo, San Maurizio d Opaglio (NO) Italy

5 Components for boiler room 046EN March 07 Pressure switches for autoclaves K374Y003, K374Y004 Regulation range To make the regulation, observe the figure below and the minimummaximum setting diagrams. Fully loosen the differential nut (). Adjust the minimum gap nut () to establish the contact closure value (pump start); turn clockwise to increase the start pressure, or anticlockwise to reduce it. Tighten the differential nut () until you obtain the required stoppage pressure. K374Y003 K374Y004 Description Pressure switch for use with cold water in autoclave systems (e.g. fire protection systems). The switch automatically regulates the starting and stopping of the circulator, on the basis of the pressure values set. The electric contacts are of the normally closed type. Minimum-maximum setting diagrams 6 K374Y003 Versions and product codes Product code Connection Regulation range Set pressure (factory calibration) K374Y003 /4 5 bar,4,8 bar K374Y004 /4 3 bar 5 7 bar Technical data Fluid temperature range 4 55 C Ambient temperature range C Protection degree IP44 Nominal voltage 500 V /4 F connection Three NC electric contacts (in brass alloy with Ag - Ni weld beading) Nominal current 6 A (resistive load); 0 A (inductive load) Max. working pressure K374Y003: 5 bar K374Y004: bar Set pressure (factory calibration) K374Y003:,4,8 bar K374Y004: 5 7 bar Regulation range K374Y003: 5 bar K374Y004: 3 bar Minimum differential K374Y003: 0,6 bar K374Y004:,5 bar Maximum differential K374Y003:,5 bar K374Y004: 5 bar Maximum setting (bar) Maximum setting (bar) Minimum setting (bar) K374Y Minimum setting (bar)

6 Components for boiler room 046EN March 07 Pressure switches for autoclaves K374Y003, K374Y004 Electrical connections LINE LINE LINE Dimensions B A C A [mm] B [mm] C [mm] Certifications Low Voltage Directive (LVD) 04/35/EU ROHS 0/65/EU EC mark Product specifications K374Y003 Pressure switch for use with cold water in autoclave systems. Factory calibration,4,8 bar. Regulation range 5 bar. /4 F connection. Three NC contacts (in brass alloy with Ag - Ni weld beading). Nominal current 6 A (resistive load); 0 A (inductive load). Nominal voltage 500 V. Protection degree IP44. Dimensions 04x00x60 mm (LxHxW). Operating temperature range C. Fluid temperature range 4 55 C. Max. working pressure 5 bar. Compliance with Low Voltage Directive (LVD) 04/35/EU; ROHS 0/65/EU. EC mark. K374Y004 Pressure switch for use with cold water in autoclave systems. Factory calibration 5 7 bar. Regulation range 3 bar. /4 F connection. Three NC contacts (in brass alloy with Ag - Ni weld beading). Nominal current 6 A (resistive load); 0 A (inductive load). Nominal voltage 500 V. Protection degree IP44. Dimensions 04x00x60 mm (LxHxW). Operating temperature range C. Fluid temperature range 4 55 C. Max. working pressure bar. Compliance with Low Voltage Directive (LVD) 04/35/EU; ROHS 0/65/EU. EC mark. Additional information For additional information please check the website or contact the technical service: ' * consulenza.prodotti@giacomini.com This pamphlet is merely for information purposes. Giacomini S.p.A. retains the right to make modifications for technical or commercial reasons, without prior notice, to the items described in this pamphlet. The information described in this technical pamphlet does not exempt the user from following carefully the existing regulations and norms on good workmanship. Giacomini S.p.A. Via per Alzo, San Maurizio d Opaglio (NO) Italy