46 -- INSTALL PULSE POWERED WATER TREATMENT SYSTEMS

Notice Date

June 28, 2001

Contracting Office

Department of Veterans Affairs, Va Medical Center, 1011 Honor Heights Drive, Muskogee, OK 74401

ZIP Code

74401

Solicitation Number

RFQ 623-24-01

Response Due

July 6, 2001

Point of Contact

Kris Kelly 918-680-3841

Description

This is a modification to a previous notice that was issued on June 28th, 2001 for the same job. The system must include the following characteristics: PULSED POWER WATER TREATMENT SYSTEM FOR BOILERS. .The System shall include: Pulsed power transformer that uses alternating current of 60 cycles per second to create a harmonic "ringing" signal of increasingly higher frequency until the decreasingly lower amplitude of this echo signal is damped down to zero. This effect imparts high frequency electromagnetic fields into the flowing water that includes frequencies in the kilohertz and megahertz range.1" thru 6": 120 VAC, 60 Hz, 1 ph, primary service. 8" thru 12": 220 VAC, 60 Hz, 1 ph, primary service. 11 to 40 VAC secondary (depending on size). 110 to 240 VAC primary (depending on size). (a) hard wired to electrical service. (b) Wall mounted. (c)Female locking connector for connecting the transformer to the pipe assembly depending on unit size. (d) Modified NEMA 12 metal enclosure (alternative NEMA 3R metal enclosure). (e) LED indicators for power and coil status. (f) Fuse assembly. (g) Convection or fan ventilation (depending on size). (h) Optional module and connection for building management system. Pipe section with coil assembly (a)The use of coils wound on job site or "wrap around" coils on existing pipe is not acceptable. (b)1" thru 2" is Sch. 40 316 stainless steel with NPT connection. 3" is Sch. 10 316 stainless steel with ANSI 150# flanged connection. (c)The coils and circuitry are contained in a larger diameter PVC collar around the pipe and has PVC end caps. (d) High temperature coil bobbin assemblies are secured by circular PVC clamps. (e) Locking power cables supplied between the power source and the transformer are 9.5 ft. to 16.5 ft. depending on unit size. (f) Built in thermal protection that will automatically turn coil assembly off if operating temperature exceeds 266 F for stainless steel. 1.1.1 Pulsed Power System (PPS) Parameters: Conductivity range of 350 to 8000 mS/cm. Total dissolved solids (TDS) of 100 to 4000 ppm. No water softener to be used with this system. pH range of 6.8 to 12.0 (typical 10 to 11 or per boiler manufacturer's recommendation) optimum for boilers. The recommended conductivity setting of 1500 mS/cm for automatic blow-down system (advantageous for scale inhibition and corrosion inhibition while saving water and sewage cost) may have to be adjusted to achieve the desired pH level allowing the TDS to follow. Local environmental regulations may dictate the highest pH permitted for blowdown. Boiler operator can raise or lower pH by the balancing of fresh make-up water and the amount of blowdown. Pulsed Power System (PPS) Functions: To change from superficial to colloidal nucleation by lowering activation energy of colloidal nucleation. Keep system free from mineral scale (e.g. surface forming precipitate) on heat transfer surfaces, pipes, heat exchangers, valves and other components in the system. Prevents new deposits of scale and removes old scale on boiler, piping and heat exchangers. The PPS permits higher total dissolved solids and lower blowdown quantity resulting in water and energy savings.Blowdown contains no added chemicals conforming to sewer discharge regulations. Installation: Power supply and coil assembly must be installed at least 3 ft. from any motor, pump or high voltage equipment which might influence the high frequency electromagnetic field. The water treatment supplier will supervise and direct all piping and electrical hook-ups associated with the PPS treatment program and will give directions to the contractor as to the various sampling, monitoring and blowdown required to ensure water chemistry of the system. Immediately after hydrostatic testing of piping is completed, closed systems shall be drained, flushed and cleaned. Subsequent to the cleaning process, each system shall be re-filled with clean water prior to the PPS being placed into operation. Optional Building Management System Interface: The Optional PPS Module will be designed to interface with building automation management systems. The interface to the building management system will be through either a FORM "A" or FORM "B" dry relay contact. The PPS Module will verify the following operating status conditions: (a) Primary Power Status -- E.g. Loss of utility power, tripped circuit breaker, blown fuse or unit unplugged. (b) Secondary Power Status -- E.g. Severed or removed coil assembly cable connection, defective transformer. (c) Power Tube Operation Status -- E.g. Power tube over heated, electronic failure. In the event of one of the above anomalies, the PPS Module will change relay status. Relay Contact Rating (MAX>): 10 VA res. (load) Switching Current (MAX>): 0.5A Contact Resistance: 0.2 OHMS The buildings automated management systems is interfaced to the water treatment system via a 2-connector conductor cable to a terminal block located within the PPS power supply. Installation and Startup Services: The PPS should initially be operated under pre-existing blowdown settings or protocol. In a new system, a nominal blowdown suggested by the boiler manufacturer should be used. After 1 week of operation, the pH will be monitored by the manufacturer's representative and compared to a target of 10.5. If the pH were below the target, the blowdown will be reduced, and if the pH is above the target, the blowdown will be increased. This process may require two or three iterations in order to stabilize at the desired pH value. When pH is stabilized, the conductivity reading or the blowdown protocol will be noted and used as the target control point. This stabilization of pH values using blowdown is considered part of the installation process, and is performed by the manufacturer's representative at no charge to the customer. The visits from the manufacturer's representative will also include the following: Inspection of the PPS for functionality Inspection of the blowdown system for functionality (a)Calibration and cleaning of conductivity probes or other instrumentation related to blowdown (b)Visual inspection of overall system condition (service visits may be timed to coincide with the opening of certain system components such as a boiler vessel or chiller). In addition to testing pH as described above, an analysis of the following water chemistry parameters will be performed within 90 days of installation at no charge to the customer: Total Dissolved Solids (a) Conductivity GUARANTEE The Manufacturer will provide the PPS with a 180-day Unconditional Guarantee. Expected Performance: New mineral scale: Absolutely none. pH of boiler water: Minimum of 9.0. The percent of feedwater that is condensate return may vary from 0% to nearly 100%, and therefore the speed of pH rise will vary. Most boilers can operate well at pH 10 11.5, and thereby produce a magnetite passive surface with good corrosion properties. Some boilers, where steam loss and mineral concentration are low, will operate in the range of pH 9 10, with insignificantly more corrosion. pH of condensate return: Range of 7.0 8.4. Calcium carbonate powder precipitation will consume alkalinity ions such as -2CO3 and -HCO3 thus reducing CO2 generation in the boiler. This CO2 would otherwise dissolve in the condensate and form carbonic acid, thereby lowering the pH. Conductivity or Total Dissolved Solids: Stable at the customer's preferred level (probably between 1000 mS/cm and 3000 mS/cm). PART 2 EXECUTION INSTALATION Install treatment equipment level and plumb. CONNECTIONS Install piping adjacent to equipment to allow service and maintenance. Ground Equipment. Tighten electrical connectors and terminals according to manufacturer's published torque-tightening values. If manufacture's torque values are not indicated, use those specified in UL 486A and UL 486B. FIELD QUALITY CONTROL Engage a factory-authorized service representative to perform startup service. Inspect field-assembled components and equipment installation, including piping and electrical connections. Report results to customer in writing. Inspect piping and equipment to determine that systems and equipment have been cleaned, flushed, filled with water, and are fully operational before turning on electrical power. Place Boiler water-treatment system into operation and calibrate controls during primary phase of Boiler water-treatment system's startup procedures. DEMONSTRATION Engage a factory-authorized service representative to train Owner's maintenance personnel to adjust, operate, and maintain Boiler water-treatment system and equipment. Train Owner's maintenance personnel on procedures and schedules for starting and stopping, troubleshooting, servicing, and maintaining equipment and water testing procedures and schedules. Review data in maintenance manuals, especially data on recommended parts inventory and supply sources and on availability of parts and service. Schedule at least four hours of training with Owner with at least seven days' advanced notice. END OF SPECIFICATION PULSED POWER WATER TREATMENT SYSTEM FOR COOLING TOWERS Furnish and install a Pulsed Power water treatment system on condenser water, cooling tower and recirculating system specified. Devices that inject chemicals use electrodes in the water, magnets, UV light, Ozone, copper or silver ions will not be accepted. The Pulsed Power system shall be properly sized by the manufacturer to provide for complete water treatment without the use of any additional chemicals or biocides. The System shall include: Pulsed power transformer that uses alternating current of 60 cycles per second to create a harmonic "ringing" signal of increasingly higher frequency until the decreasingly lower amplitude of this echo signal is damped down to zero. This effect imparts high frequency electromagnetic fields into the flowing water that includes frequencies in the kilohertz and megahertz range. (a)1" thru 6": 120 VAC, 60 Hz, 1 ph, primary service. 8" thru 12": 220 VAC, 60 Hz, 1 ph, primary service. (b) 11 to 40 VAC secondary (depending on size). (c)110 to 240 VAC primary (depending on size). (d)hard wired to electrical service. (e) Wall mounted. (f)Female locking connector for connecting the transformer to the pipe assembly depending on unit size. (g)Modified NEMA 12 metal enclosure (alternative NEMA 3R metal enclosure). (h)LED indicators for power and coil status. (i)Fuse assembly. (j)Convection or fan ventilation (depending on size). (k)Optional module and connection for building management system. Pipe section with coil assembly The use of coils wound on job site or "wrap around" coils on existing pipe is not acceptable. (a)1" thru 2" is 316 stainless steel Sch. 40 with NPT connections. 3" is 316 stainless steel Sch. 10 with ANSI 150# flanged connections. 4" thru 12" is PVC Sch. 80 with ANSI 150# flanged connections. Larger sizes or special materials as specified. (b)The coils and circuitry are contained in a larger diameter PVC collar around the pipe and has PVC end caps. (c)High temperature coil bobbin assemblies are secured by circular PVC clamps. (d)Locking power cables supplied between the power source and the transformer are 9.5 ft. to 16.5 ft. depending on unit size. (e)Built in thermal protection that will automatically turn coil assembly off if operating temperature exceeds 266 F for stainless steel or 212 F for PVC. The 212 F thermal protection for PVC units protects the internal circuitry from internally generated heat. The PVC unit shall not be used in environments with application temperatures above 140 F due to degradation of PVC's mechanical properties. Pulsed Power System (PPS) Parameters: Conductivity range of 350 to 8000 mS/cm. Total dissolved solids (TDS) of 100 to 4000 ppm. pH range of 6.8 to 9.5 (typical 8.5 for galvanized towers 9.0 for non-galvanized) or per cooling tower manufacturer's recommendation. The recommended conductivity setting of 1500 mS/cm for automatic blow-down system (advantageous for scale inhibition and corrosion inhibition while saving water and sewage cost) may have to be adjusted to achieve the desired pH level allowing the TDS to follow. Local environmental regulations may dictate the highest pH permitted for blowdown. Cooling tower operator can raise or lower pH by the balancing of fresh make-up water and the amount of blowdown. Total bacteria count (TBC) of less than 10,000 CFU's/ml. The bacteria count is expected to range from 2000 to 4000 under most normal blowdown schedules. However, if extremely low blowdown is used for water conservation the TBC will remain under 10,000. Pulsed Power System (PPS) Functions: To change from superficial to colloidal nucleation by lowering activation energy of colloidal nucleation. Keep system free from mineral scale (e.g. surface forming precipitate) on the fill material, pipes, heat exchangers, valves and other components in the system. Control the population of microorganisms such as bacteria, algae and protozoa by incorporation into colloidal precipitates (encapsulation) regardless of what species are present and how they may have mutated. 10,000 CFU's/ml or below. Typically the total bacteria count (TBC) is in the range of 2000 -- 4000 CFU's/ml. The PPS permits higher total dissolved solids and lower blowdown quantity resulting in water and energy savings. Blowdown contains no added chemicals conforming to sewer discharge regulations. Installation: Power supply and coil assembly must be installed at least 3 ft. from any motor, pump or high voltage equipment which might influence the high frequency electromagnetic field. The water treatment supplier will supervise and direct all piping and electrical hook-ups associated with the PPS treatment program and will give directions to the contractor as to the various sampling, monitoring and blowdown required to ensure water chemistry of the system. Immediately after hydrostatic testing of piping is completed, closed systems shall be drained, flushed and cleaned. Subsequent to the cleaning process, each system shall be re-filled with clean water prior to the PPS being placed into operation. Optional Building Management System Interface: The Optional PPS Module will be designed to interface with building automation management systems. The interface to the building management system will be through either a FORM "A" or FORM "B" dry relay contact. The PPS Module will verify the following operating status conditions: Primary Power Status -- E.g. Loss of utility power, tripped circuit breaker, blown fuse or unit unplugged. Secondary Power Status -- E.g. Severed or removed coil assembly cable connection, defective transformer. Power Tube Operation Status -- E.g. Power tube over heated, electronic failure. In the event of one of the above anomalies, the PPS Module will change relay status. Relay Contact Rating (MAX>): 10 VA res. (load) Switching Current (MAX>): 0.5A Contact Resistance: 0.2 OHMS The buildings automated management systems is interfaced to the water treatment system via a 2-connector conductor cable to a terminal block located within the PPS power supply. Installation and Startup Services: The PPS should initially be operated under pre-existing blowdown settings or protocol. In a new system, a nominal blowdown suggested by the cooling tower manufacturer should be used. After 1 week of operation, the pH will be monitored by the manufacturer's representative and compared to the following targets: Cooling Tower (galvanized) pH 8.5 Cooling Tower (not galvanized) pH 9.0 If the pH were below the target, the blowdown will be reduced, and if the pH is above the target, the blowdown will be increased. This process may require two or three iterations in order to stabilize at the desired pH value. When pH is stabilized, the conductivity reading or the blowdown protocol will be noted and used as the target control point. This stabilization of pH values using blowdown is considered part of the installation process, and is performed by the manufacturer's representative at no charge to the customer. The visits from the manufacturer's representative will also include the following: (a) Inspection of the PPS for functionality (b)Inspection of the blowdown system for functionality (c)Calibration and cleaning of conductivity probes or other instrumentation related to blowdown (d) Visual inspection of overall system condition (service visits may be timed to coincide with the opening of certain system components such as a boiler vessel or chiller). In addition to testing pH as described above, an analysis of the following water chemistry parameters will be performed within 90 days of installation at no charge to the customer: (a) Total Dissolved Solids (b)Conductivity (c)Total Bacteria Count GUARANTEE The Manufacturer will provide the PPS with a 180-day Unconditional Guarantee. Expected Performance: Total Bacteria Count: 2000-3000 CFU/ml (Colony Forming Units per milliliter). [During periods when pre-existing bio-film is breaking down, there may be brief excursions to 15,000 CFU/ml or more.] Algae: None in floating colonies or large patches. Small patches at water inlet, spay area, and fan housing may occur. Brief submerged blooms can occur on a silt layer in the spring. Conductivity or Total Dissolved Solids: Stable at the customer's preferred level (probably between 800 mS/cm and 3000 mS/cm). Conductivity will determine the cycles of concentration and therefore water savings. These settings and values will determine the level of suspended particle fouling (if any occurs) of heat exchangers, which in turn depends on water quality in the area, and solids removal features built into the existing system. Encrustation on the fill material: None. Light powdery residue that may adhere to the fill material can be ignored or removed with a garden hose. pH: 7.5-9.0. A new galvanized tower should be conditioned by operation below a pH of 8.3 for six weeks. PART 2 EXECUTION INSTALATION Install treatment equipment level and plumb. CONNECTIONS Install piping adjacent to equipment to allow service and maintenance. Ground Equipment. Tighten electrical connectors and terminals according to manufacturer's published torque-tightening values. If manufacture's torque values are not indicated, use those specified in UL 486A and UL 486B.FIELD QUALITY CONTROL Engage a factory-authorized service representative to perform startup service. Inspect field-assembled components and equipment installation, including piping and electrical connections. Report results to customer in writing. Inspect piping and equipment to determine that systems and equipment have been cleaned, flushed, filled with water, and are fully operational before turning on electrical power. Place Cooling Tower water-treatment system into operation and calibrate controls during primary phase of Cooling Tower water-treatment system's startup procedures. DEMONSTRATION Engage a factory-authorized service representative to train Owner's maintenance personnel to adjust, operate, and maintain Cooling Tower water-treatment system and equipment. Train Owner's maintenance personnel on procedures and schedules for starting and stopping, troubleshooting, servicing, and maintaining equipment and water testing procedures and schedules. Review data in maintenance manuals, especially data on recommended parts inventory and supply sources and on availability of parts and service. Schedule at least four hours of training with Owner with at least seven days' advanced notice. END OF SPECIFICATION

Record

Loren Data Corp. 20010702/46SOL003.HTM (W-179 SN50Q465)