Section: 8000 I.O.M.: 8906 Issued: 05/06 Replaces: 12/02 PENBERTHY Installation, Operation and Maintenance for Penberthy Electronic Water Level Gauge Model 12B Part No.: Enclosure Type : Input Power : Electrode Output : Alarm & Trip Relay Contact Rating: Serial No.
TABLE OF CONTENTS Product Warranty . . . . . . . 1.0 Description . . . . . . . 2.0 Supply & Installation . . . . . . 2.1 Packing . . . . . . . 2.2 Wiring Requirements . . . . . 2.3 Location of Electronics . . . . . 2.4 Water Column . . . . . . 2.5 Probes . . . . . . . 2.6 Wiring . . . . . . . 2.6.1 At The Probes . . . . . 2.6.2 At the Electronic Module . . . 2.6.3 Display Panel . . . . . 2.6.3.1 Flash Programming . . . 2.6.4 Control Output . . . . . 2.6.5 Electronic Fault Output . . . . 2.6.
PENBERTHY PRODUCT WARRANTY Tyco Valves & Controls Prophetstown warrants its Penberthy products as designed and manufactured by TV&C Prophetstown to be free of defects in the material and workmanship for a period of one year after the date of installation or eighteen months after the date of manufacture whichever is earliest. TV&C Prophetstown will, at its option, replace or repair any products which fail during the warranty period due to defective material or workmanship.
INSTALLATION, OPERATION and MAINTENANCE MANUAL FOR PENBERTHY Model 12B 1.0 Description The Penberthy Model 12B is an accurate and ultra-reliable instrument for detection of steam/water presence in subcritical pressure steam generators. The unit provides up to 12 channels per unit (cascadable) for steam/water indication and is complete with control outputs and internal system fault monitoring, Local and Remote indication and Level Fault output.
all enclosures should be specified as metallic or with a conductive coating rather than the basic polymer enclosures. Wiring shields should be terminated on both ends to the enclosures’ ground lugs – not to circuit common. TV&C – Prophetstown recommends that all wiring be enclosed in electrical metallic tubing (EMI) and that drip loops are established at each enclosure entry point. Spiral wrap cable conduits (e.g. Greenfield, BX) should not be used. 2.
2.5 Probes The Model 12B is supplied with either of two probe styles. For applications below 525°F [274°C] / 850 psi [58 bar], an economical probe is available with a PTFE wetted insulator. It can not be used if either parameter (525°F [274°C] or 850 psi [58 bar]) is exceeded. For all other applications, probes with the zirconium oxide (ceramic) insulators must be used. The high pressure (HP) probes are easily recognized by the brazing between the insulator and the body (fig 1).
2.5.1 2.5.2 Probes are supplied fully assembled. Probe receptacles on the water column are ½” swaged fittings. To ensure the probes remain clean, mount the receptacles so the probes are exposed to mild fluid circulation. Do not locate the probes in high velocity steam or water. Probes may be located horizontally or vertically with the electrical connection up. 2.5.3 Ensure that the receptacle and probe retaining nut threads and sealing surfaces are clean.
the same manner. Cascaded Electronic Modules (more than 12 channels) may be installed with probe wiring in numerical series or interleaved. If interleaving is used, make certain that the low Electronic Module Probe 1 terminal block location is wired to the lowest probe or the level fault logic will not work. The wiring method used must be specified so the level fault logic can be properly programmed at the factory.
Follow the connections above for mains 1 using TB28. Fuse positions are F3 and F4 for mains 2. Earth bonding should be to the earthing lug on the mounting plate. Mains power is MOV protected. Although the Model 12B uses jumper set dual primary toroidal transformers, do not attempt to change factory set mains voltage level unless the MOV’s are also changed to the proper value. If a door mounted local display or 4-20 mA loop output was specified, a ribbon cable connects it to the connector at fig 6, loc 14.
2.6.3.1 Flash Programming (refer to fig 6, loc 17) For operationally critical point indication – any green (water) or red (steam) LED on all displays may be user programmed to flash. As supplied all LED’s are programmed steady state. There are two columns each three pins wide. Red LED control is the left three pin columns; green, the right three pin columns. If the shorting link is placed on the right two pins in a color column, that LED color/channel will be steady state.
2.6.7 Probe Wiring (refer to fig 6, loc 4) Each electronic module will support a maximum of twelve probes. Each probe input to the module may have two wires. These are probe wire (electrode marked “E” = minimum wiring required with all systems) and a open/short sense wire, marked “S” (optional). Wiring at the probe is via the crimp type eyelet supplied with each probe. If the eyelet is not used intermittent operation may result. At least two ground wires must be connected to the water column ground.
(8) Visually check all the probes for any sign of leaks. Replacement of the probe cover using the ¼” socket head cap screws will complete the commissioning of the water column. (9) The metallic sensing tip of any probe may self-passivate or the probe insulator may retain a slightly conductive film from processing. A “hot start” as outlined above will clear any residual passivation or coating.
3.3.1 Power Supply Fault Two separate power supplies provide detection power for the Model 12B. The output of both power supplies are diode shared such that if one supply fails the remaining supply will carry 100% of the system load. Each supply has its own full bridge rectifier, filter and a regulator. For the basic unit, the low voltage transformer with fused input is shared by the two DC supplies.
3.3.3 Continuity Monitoring (if open / short option was ordered) When two wires are connected to each probe, cable continuity testing is continuously performed. Connect one wire from the “E” (electrode) terminal to the probe and another wire from the “S” (sense) terminal to the probe.
to verify all pressure has been relieved. The metal-to-metal sealing surface initially may cause the probe to stick, so carefully free the joint by tapping the probe on the metal body. Do not strike the zirconia insulator and do not use a wrench to turn the probe hex nuts. (3) After the probe becomes free, loosen the probe retaining nut fully and remove the probe. (4) The threads on the probe receptacle and probe retaining nut should be relubricated each time the probe is reinserted (refer to section 2.
5.0 Maintenance Each boiler installation is subject to varying operating and water conditions. Generally, the higher operating pressure units (>1800 psi [125 bar]) have improved water treatment and, as such, maintenance is minimized. 5.1 Water Column A specific maintenance program is difficult to detail but the following outlines the minimum required: (1) The water column should be blown down periodically and visually inspected for leaks every 3 months.
(4) The integrity of the probe can be checked by using an ohmmeter. Resistance measurement across the insulator of 10 MΩ or greater indicates the probe is performing satisfactorily. If the system is selected for detection of high conductivity water (greater than 25 μS), a probe resistance measurement of 1 MΩ or greater may be considered satisfactory. For the ultra high sensitivity system option (<1μS conductivity), 20 MΩ is minimum.
(4) Restore power to the unit. If the continuity monitoring option was ordered, the shorted wire detection is factory set to indicate fault condition upon the detection of the equivalent of ≈1000 μS water. If the water conductivity sense resistors are changed, the three short-circuit resistors should be changed at the same time. Refer to figure 6, location 7 and use the procedure outlined above. 6.
Wiring Specification: Junction Box to Electronic Module: Electronic Module To Remote Display: 300V, 221°F [105°C] 18-24 AWG or larger shielded PVC, 14 or 26 conductor 300V, 221°F [105°C] 16-20 AWG or larger PVC 28 conductor Dimensions/Weights: Electronic Module (Up to 12 Probe System) 16” [40.6 cm] H x 16” [40.6 cm] W x 8” [20.3 cm] D Single Transformer 20 lbs [ 9 kg] Dual Transformer 22 lbs [10 kg] Manufacturing Standards: Column: Electronics: ASME Section 1, ASME B31.1 CSA 22.
*Specifications and descriptions are subject to change without notice. 8.0 Troubleshooting Water Column: Sensitivity/Conductivity: Probes: Probe Wiring: Line Power/Fuses: Power Supplies: S/W discrimination: Clock Fault/Backup: Electric Fault: Level Fault: Continuity (Open/Short): Control Relay: Display Module Wiring: LED Flash: Refer to section 5.1 Refer to sections 2.2 and 3.2 Refer to sections 2.4, 3.5 and 5.2 Refer to sections 2.2, 2.5.1, 2.5.2, 2.5.7 and fig 4, 5 & 6 Refer to section 2.5.2 and 3.3.
10.0 Telephone Assistance / Factory Repair If you are having difficulty with your Model 12B, contact your local Tyco / Penberthy distributor. You may also contact the factory direct at (815) 537-2311 and ask for an applications engineer. So that we may assist you more effectively, please have as much of the following information available when you call: Model # Serial # Name of the company from whom you purchased the Model 12B Invoice # and date Process conditions (pressure, temperature, cycle rate, etc.
Figure 2 – Standard Enclosure (up to 12 Probes) 19 Serial No. Enclosure Type : Part No.
Figure 3 – Standard Enclosure (13-24 Probes) 20 1592 1522 1466 1403 1340 1277 1214 1151 1088 1025 962 899 836 773 710 641 584 521 458 395 332 269 206 143 Serial No. Enclosure Type : Part No.
Figure 4 – Wiring Diagram (up to 12 Probes) 21
Figure 5 – Wiring Diagram (13-24 Probes) 22
Figure 6 – Motherboard Layout 23
Figure 7 – Full-Size Panel Mount Display (up to 12 Probes) 24
Figure 8 – Full-Size Display in NEMA 4X Enclosure (up to 12 Probes) 25
Figure 9 – Mini Display in NEMA 4X Enclosure (up to 12 Probes) 26
Figure 10 – Mini Panel Mount Display (up to 12 Probes) 27
Figure 11 – Full-Size Panel Mount Display (13-24 Probes) 28
Figure 12 – Mini Panel Mount Display (13-24 Probes) 29
TV&C – Prophetstown ≈ DECLARATION of CONFORMITY ≈ In conformance with ISO/IEC Guide 22 - 96 12B.DC r 0 Manufacturer's Name: Manufacturer's Address: Product: Type of Equipment: Equipment Class: Model Designation: Tyco Valves and Controls B Prophetstown, L.P. 320 Locust Street Prophetstown, IL 61277-1147 U.S.A.
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Tyco Valves & Controls, L.P. Prophetstown 320 Locust St., Prophetstown, Illinois 61277 Phone: 815-537-2311 FAX: 815-537-5387 Printed in USA Part No. 18LC6-019 © 2006 TV&C, L.P.
