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NRG 10-52, NRG 16-52 - USA - Installation & Operating Manual -

850696-00

Installation example with dimensions

Fig. 6

Level pot for external use

1

Flange

2

Perform preliminary inspection of standpipe and flange during the boiler inspection

3

Protective foam tube/level pot

4

Reducer

5

Pressure relief hole

6

High water HW

7

Low water LW

8

Electrode tip

9

Electrode spacing

≥

0.55 in (

≥

14 mm) (air gap and creepage path)

CD Center distance

Key

Pipe diameter
(DN)

CD

1" - 11.5 NPT

1

7

6

3

2

≥

0.55 in

(

≥

14 mm)

8

9

4

Pipe diameter
(DN)

≥

Pipe diameter/2

(

≥

DN/2)

≥

Pipe diameter/2

(

≥

DN/2)

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Содержание NRG 10-52

Страница 1: ...Level Electrode NRG 10 52 NRG 16 52 Original Installation Operating Manual 850696 00 EN USA English ...

Страница 2: ...y information 9 Required personnel qualifications 10 Notes on product liability 10 Function 11 Technical data 12 Rating plate identification 12 Overall view 13 Dimensions 14 Preparing for installation 15 Installation 16 Installing the NRG 10 52 NRG 16 52 step 1 17 Functions table 17 Installing the NRG 10 52 NRG 16 52 step 2 18 Installation example with dimensions 19 Electrical connection 21 Five p...

Страница 3: ...G 16 52 USA Installation Operating Manual 850696 00 Contents Bringing into service fault indications and troubleshooting 23 Taking out of service 23 Disposal 24 Returning decontaminated equipment 24 UL components 24 ...

Страница 4: ...696 00 08 2021cm Copyright All rights reserved Any misuse particularly reproduction and dissemination to third parties is not permitted The General Terms Conditions of GESTRA AG apply Scope of supply product package NRG 10 52 1 Level electrode NRG 10 52 1 Installation Operating Manual NRG 16 52 1 Level electrode NRG 16 52 1 Installation Operating Manual ...

Страница 5: ... full and follow all instructions Please also read the instructions for use of any accessories The Installation Operating Manual is part of the product package Keep it in an easily acces sible location Availability of this Installation Operating Manual Make sure this Installation Operating Manual is always available to the operator If you pass on or sell the equipment to a third party please also ...

Страница 6: ...rous situation that results in death or serious injury WARNING Warning of a dangerous situation that may possibly result in death or serious injury CAUTION Warning of a situation that may result in minor or moderate injury ATTENTION Warning of a situation that results in damage to property or the environment ...

Страница 7: ...g point of the plant The operating point describes the operating parameters within which a plant or boiler is operated in its nominal range In a steam boiler for example these parameters would be output pressure and temperature The design data may be a lot more stringent however A boiler that is operated at 145 psi 10 bar and 356 F 180 C may be designed to withstand a pressure of 870 psi 60 bar an...

Страница 8: ...owing level switch NRS 1 56 Improper use There is a danger of death due to explosion if the equipment is used in potentially explosive atmospheres Do not use the equipment in potentially explosive atmospheres Do not bring any equipment into service that does not have its own specific rating plate The rating plate indicates the technical features of the equipment Applicable directives and standards...

Страница 9: ... the plant is not carrying live voltage before commencing work Danger to life Hot steam or hot water can suddenly escape from a faulty NRG 10 52 NRG 16 52 level electrode Shocks and impacts during transport or installation can result in damage to or leaks in the level electrode causing pressurized hot steam or hot water to escape through the pressure relief hole To prevent damage during transport ...

Страница 10: ...and brought into service by qualified and competent staff Operation Boiler service technician Staff trained by the plant operator Maintenance work Specialist staff Fitting and maintenance work may only be performed by authorized staff who have undergone specific training Refits Specialist staff Persons trained by the plant operator to work with pressure and temperature Notes on product liability T...

Страница 11: ... For internal installation a protective tube provided on site ensures reliable function see section Installation examples on p 19 The level electrode can be installed in a single protective tube or level pot together with a GESTRA level electrode for water level limitation or for use as a high level alarm Safety information The equipment may only be installed wired and brought into service by qual...

Страница 12: ...cording to EN 60529 NEMA type 1 according to NEMA 250 Admissible ambient temperature Max 158 F 70 C Weight Approx 3 53 lb 1 6 kg NRG 16 52 L 39 37 in 1000 mm Transport temperature 4 F 176 F 20 C 80 C 100 hours only switch on after a defrosting period of 24 hours Storage temperature 4 F 158 F 20 C 70 C only switch on after a defrosting period of 24 hours Other information Incorporated Type 1 action...

Страница 13: ...G 10 52 NRG 16 52 USA Installation Operating Manual 850696 00 1 2 3 Overall view of the NRG 10 52 NRG 16 52 Fig 1 A B C Key A Five pole connector B Cover tube C Electrode thread D Electrode rods E Spacer D E ...

Страница 14: ...nual 850696 00 Dimensions Fig 3 NRG 1 52 with five pole connector 10 24 in 260 mm 1 2 3 4 0 8 in 20 mm Thermal insulation provided on site 1 11 5 NPT 1 2 in 30 mm 1 35 in 50 mm 0 55 in 14 mm 2 55 2 75 in 65 70 mm 39 37 in 1000 mm 59 05 in 1500 mm Size 41 ...

Страница 15: ...dmissible ambient conditions in the technical data see page 12 Do not operate the equipment if the temperature is below freezing At temperatures below freezing use a suitable heat source e g control cabinet heater etc Connect all parts of the plant to a central grounding point to prevent equalizing currents Use a cover to protect the equipment from direct sunlight condensation and heavy rain Use U...

Страница 16: ...ation n Avoid subjecting electrode rods to hard impacts n Ensure a minimum of 1 2 in 30 mm for the electrode tip insulation n Do not install the upper part of the level electrode cover tube B in the boiler s thermal insulation n Do not coat the electrode thread with conductive paste or grease n Make sure there is a creepage path of at least 0 55 in 14 mm between the electrode tips and ground flang...

Страница 17: ... the NRG 10 52 NRG 16 52 step 1 1 Determine the measured lengths of the electrode tips enter the dimensions in the Functions table and mark with a scriber 2 Cut electrode tips 1234with a bolt cutter 2 Deburr the end faces of the electrode tips 3 Strip off 1 95 in 50 mm of the PTFE insulation from the lower end of the electrode tip Make sure that the remaining insulation measures at least 1 2 in 30...

Страница 18: ...ble The electrode body does not sit on the flange i e the underside of the hexagon is not in contact with the flange also see Fig 4 If it is in contact the internal thread is outside tolerance In this case the flange must be replaced After the electrode has been installed with PTFE sealing tape you must ensure there is adequate electrical contact between the electrode and the boiler wall To do thi...

Страница 19: ...al 850696 00 Installation examples with dimensions Fig 5 Protective tube provided on site if electrode is used as an internal water level limiter 0 8 in 20 mm 0 8 in 20 mm 0 8 in 20 mm NPS 2 DN 50 1 11 5 NPT 90 0 39 in 10 mm 0 55 in 14 mm 1 2 5 6 8 7 9 4 3 ...

Страница 20: ...ction of standpipe and flange during the boiler inspection 3 Protective foam tube level pot 4 Reducer 5 Pressure relief hole 6 High water HW 7 Low water LW 8 Electrode tip 9 Electrode spacing 0 55 in 14 mm air gap and creepage path CD Center distance Key Pipe diameter DN CD 1 11 5 NPT 1 7 6 3 2 0 55 in 14 mm 8 9 4 Pipe diameter DN Pipe diameter 2 DN 2 Pipe diameter 2 DN 2 ...

Страница 21: ...ector of the NRG 10 52 NRG 16 52 i Level electrode NRG 10 52 NRG 16 52 j Retaining bracket k Lower part of connector l Contact block m Screw n Sealing ring Key o Upper part of connector p Gasket q Ring r Cable gland s Control cable Tools n Flat blade screwdriver 3 32 in 2 4 mm i j k l m n o p q r s Fig 7 ...

Страница 22: ...control cabinet Attention 1 Swing the retaining bracket j up and detach the upper part of the connector o from the level electrode 2 Undo the screw m and press the contact block l out of the upper part of the connector o Take care not to lose the sealing ring n 3 Unscrew the cable gland r 4 Pull the cable s through the cable gland r ring q gasket p and upper part of the connec tor o 5 Connect the ...

Страница 23: ...r pressure Reduce the boiler pressure to 0 psi 0 bar and check the pressure before unscrewing the level electrode Only remove the level electrode at 0 psi 0 bar boiler pressure WARNING The hot level electrode can cause severe burns The level electrode gets very hot during operation Always let the level electrode cool down before performing installation and maintenance work Only remove level electr...

Страница 24: ...on of decontamination The return confirmation and declaration of decontamination must be attached to the outside of the return package as processing will otherwise be impossible and the products will be returned to the sender at their expense Please proceed as follows 1 Let GESTRA AG know about the return beforehand by e mail or phone 2 Wait until you have received the return confirmation from GES...

Страница 25: ...25 NRG 10 52 NRG 16 52 USA Installation Operating Manual 850696 00 For your notes ...

Страница 26: ...26 NRG 10 52 NRG 16 52 USA Installation Operating Manual 850696 00 For your notes ...

Страница 27: ...27 NRG 10 52 NRG 16 52 USA Installation Operating Manual 850696 00 For your notes ...

Страница 28: ...42 00 GESTRA AG Bremen GESTRA AG Münchener Straße 77 28215 Bremen Germany Tel 49 421 3503 0 Fax 49 421 3503 393 e mail info de gestra com Web www gestra com You can find our authorized agents around the world at www gestra com ...

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